Federal Capture Intelligence

Top DOI plumbing, heating, and air-conditioning contractors (NAICS 238220)

Contract actions: October 1, 2021 – September 10, 2026 Updated September 11, 2026 Department of the Interior agency guide NAICS 238220 · Plumbing, Heating, and Air-Conditioning Contractors
Latest 12 months
$34.0M
Net obligations · Up $11.6M vs. $22.5M preceding
Prime contractors
312
With positive obligations in the latest 12 months

Research the DOI federal contracting market for plumbing, heating, and air-conditioning under NAICS 238220. Compare top federal contractors and market share, reported contract obligations and spending trends, funding-office attribution, recent award activity, and contract types, competition, and procurement methods.

Contract obligation trends for Plumbing, Heating, and Air-Conditioning Contractors at the Department of the Interior

Federal records show $140.3M in net obligations across 1,601 awards in Plumbing, Heating, and Air-Conditioning Contractors at the Department of the Interior from Oct 1, 2021 through Sep 10, 2026. This market accounts for 0.54% of $25.8B in agency-wide net prime contract obligations over the period shown. Latest 12-month net obligations increased 51.5% from $22.5M to $34.0M. 69 prime contractors accounted for at least 80% of positive obligations in that latest period.

Fiscal-year activity

FY26 is year-to-date through Sep 10, 2026; earlier years show complete fiscal-year totals.

FY26 year-to-date: $24.1M versus $15.1M through the same date in FY25 (+59.7%).
Net obligations · complete fiscal yearNet obligations · FY26 YTDContract actions
View fiscal-year data table
Fiscal yearNet obligationsContract actionsCoverage
FY2022$34.1M538Complete
FY2023$18.2M543Complete
FY2024$38.8M600Complete
FY2025$25.0M605Complete
FY2026$24.1M598YTD through Sep 10, 2026

Market at a glance

All reported prime contract awards
All-period net obligations
$140.3M
1,601 awards · 907 prime contractors
Latest 12-month movement
+51.5%
$34.0M vs. $22.5M
Leading eight prime share
34.7%
Share held by the eight leading prime contractors in the latest 12 months
View agency share, denominators, and set-aside reporting
Agency context
0.54% of $25.8B in agency-wide net obligations.
Set-aside share when reported
64.8% of 1,560 awards with reported set-aside status.
Set-aside reporting
1,011 set aside · 549 no set-aside · 41 not reported

What changed in the last 12 months?

Sep 11, 2025–Sep 10, 2026, compared with Sep 11, 2024–Sep 10, 2025.

Competitive shifts

47 contractors were first observed in this market during the latest 12 months
$8.9MLatest 12-month obligations
Contractor-level obligations and first-observed dates appear below. “First observed” applies only to this market and the period shown.
View 47 contractors
ContractorLatest 12 months
KAIVA-SIGNATURE JV, LLC had no reported activity in the latest 12 months
$1.4M→$0No latest-period activity
It previously ranked #2 by positive obligations, based on 6 reported actions.
AXIOM BUILDERS INC lost the most market share
8.3%→3.5%−4.8 percentage points
The contractor now ranks #4 by positive obligations, based on 8 reported actions.
MCKENZIE CONSTRUCTION & SITE DEVELOPMENT LLC was the largest newly observed contractor
$1.6MLatest 12-month obligations
First observed in this market on Sep 26, 2025, the contractor now ranks #3 by positive obligations across 2 reported actions.

Buyer demand

Reported obligations through PWR PORE MABO (84000) increased
$272K→$4.0M+$3.7M
Latest-period activity spans 7 awards across 6 prime contractors.
Reported obligations through PWR LAME(81000) decreased
$1.4M→$387K−$1.0M
Latest-period activity spans 13 awards across 12 prime contractors.
How these findings are calculated

Findings are selected from matched-period changes in obligations, share, rank, funding offices, concentration, reported set-asides, material award actions, and agency-peer outliers. Related signals are combined, and only material evidence-backed changes are shown. Review the full methodology.

Federal contract obligations by funding office

See how positive obligations were attributed across funding offices in the 12 months ending Sep 10, 2026.

11.6% of positive obligations were attributed to PWR PORE MABO (84000). That represents $4.0M, up $3.7M from the preceding 12 months.

Latest 12-month share of positive obligations; the gray segment represents all other reported offices.

  1. PWR PORE MABO (84000)11.6% · $4.0M · up $3.7M
  2. NER SERVICES MABO (43000)10.3% · $3.5M · up $562K
  3. INDIAN EDUCATION ACQUISITION OFFICE8.8% · $3.0M · up $2.0M
  4. MWR MIDWEST REGION(60000)7.0% · $2.4M · up $1.9M
  5. NER SUPPLY MABO(45000)6.8% · $2.3M · up $1.3M
  6. All other reported offices55.5% of positive obligations
View reported office rankings, comparisons, and evidence

USAspending assigns each award to a funding office. That office may differ from the requiring activity, program office, contracting office, individual buyer, or actual customer.

  1. Reported funding office

    PWR PORE MABO (84000)

    #1Up 22 from #23

    Latest 12 months

    $4.0M

    11.6% of positive obligations

    Versus preceding 12 months

    +$3.7M

    6 active prime contractors · 7 awards

    View office comparison and evidence

    Reported obligations increased 1356.7% from $272K to $4.0M. The office’s share of positive obligations moved from 1.2% to 11.6%, a change of +10.4 percentage points.

    The latest period contains 7 actions across 7 awards and 3 newly active prime contractors. The preceding period contained 7 active prime contractors and 8 awards.

    Leading award-level changes

  2. Reported funding office

    NER SERVICES MABO (43000)

    #2Down 1 from #1

    Latest 12 months

    $3.5M

    10.3% of positive obligations

    Versus preceding 12 months

    +$562K

    26 active prime contractors · 30 awards

    View office comparison and evidence

    Reported obligations increased 19.0% from $3.0M to $3.5M. The office’s share of positive obligations moved from 13.1% to 10.3%, a change of −2.8 percentage points.

    The latest period contains 43 actions across 30 awards and 17 newly active prime contractors. The preceding period contained 18 active prime contractors and 20 awards.

  3. Reported funding office

    INDIAN EDUCATION ACQUISITION OFFICE

    #3Up 4 from #7

    Latest 12 months

    $3.0M

    8.8% of positive obligations

    Versus preceding 12 months

    +$2.0M

    23 active prime contractors · 36 awards

    View office comparison and evidence

    Reported obligations increased 196.4% from $1.0M to $3.0M. The office’s share of positive obligations moved from 4.5% to 8.8%, a change of +4.3 percentage points.

    The latest period contains 63 actions across 36 awards and 11 newly active prime contractors. The preceding period contained 29 active prime contractors and 38 awards.

  4. Reported funding office

    MWR MIDWEST REGION(60000)

    #4Up 9 from #13

    Latest 12 months

    $2.4M

    7.0% of positive obligations

    Versus preceding 12 months

    +$1.9M

    8 active prime contractors · 9 awards

    View office comparison and evidence

    Reported obligations increased 391.1% from $482K to $2.4M. The office’s share of positive obligations moved from 2.1% to 7.0%, a change of +4.8 percentage points.

    The latest period contains 9 actions across 9 awards and 6 newly active prime contractors. The preceding period contained 7 active prime contractors and 8 awards.

  5. Reported funding office

    NER SUPPLY MABO(45000)

    #5Up 1 from #6

    Latest 12 months

    $2.3M

    6.8% of positive obligations

    Versus preceding 12 months

    +$1.3M

    15 active prime contractors · 15 awards

    View office comparison and evidence

    Reported obligations increased 125.1% from $1.0M to $2.3M. The office’s share of positive obligations moved from 4.6% to 6.8%, a change of +2.2 percentage points.

    The latest period contains 20 actions across 15 awards and 12 newly active prime contractors. The preceding period contained 5 active prime contractors and 5 awards.

  6. Reported funding office

    NCR REGIONAL CONTRACTING(30000)

    #6Down 3 from #3

    Latest 12 months

    $1.6M

    4.7% of positive obligations

    Versus preceding 12 months

    −$305K

    8 active prime contractors · 12 awards

    View office comparison and evidence

    Reported obligations decreased 15.9% from $1.9M to $1.6M. The office’s share of positive obligations moved from 8.5% to 4.7%, a change of −3.8 percentage points.

    The latest period contains 14 actions across 12 awards and 6 newly active prime contractors. The preceding period contained 4 active prime contractors and 11 awards.

  7. Reported funding office

    SER EAST MABO(51000)

    #7Up 18 from #25

    Latest 12 months

    $1.1M

    3.3% of positive obligations

    Versus preceding 12 months

    +$877K

    19 active prime contractors · 20 awards

    View office comparison and evidence

    Reported obligations increased 336.9% from $260K to $1.1M. The office’s share of positive obligations moved from 1.2% to 3.3%, a change of +2.2 percentage points.

    The latest period contains 24 actions across 20 awards and 14 newly active prime contractors. The preceding period contained 12 active prime contractors and 13 awards.

  8. Reported funding office

    PWR HONO MABO(82000)

    #8Up 7 from #15

    Latest 12 months

    $1.1M

    3.2% of positive obligations

    Versus preceding 12 months

    +$731K

    8 active prime contractors · 11 awards

    View office comparison and evidence

    Reported obligations increased 204.8% from $357K to $1.1M. The office’s share of positive obligations moved from 1.6% to 3.2%, a change of +1.6 percentage points.

    The latest period contains 24 actions across 11 awards and 3 newly active prime contractors. The preceding period contained 6 active prime contractors and 8 awards.

  9. Reported funding office

    PWR SF/SEA MABO(85000)

    #9Up 1 from #10

    Latest 12 months

    $1.1M

    3.1% of positive obligations

    Versus preceding 12 months

    +$313K

    13 active prime contractors · 17 awards

    View office comparison and evidence

    Reported obligations increased 41.3% from $757K to $1.1M. The office’s share of positive obligations moved from 3.4% to 3.1%, a change of −0.2 percentage points.

    The latest period contains 22 actions across 17 awards and 7 newly active prime contractors. The preceding period contained 12 active prime contractors and 13 awards.

  10. Reported funding office

    MWR OHIO(64000)

    #10Down 1 from #9

    Latest 12 months

    $1.0M

    3.0% of positive obligations

    Versus preceding 12 months

    +$246K

    16 active prime contractors · 18 awards

    View office comparison and evidence

    Reported obligations increased 31.8% from $772K to $1.0M. The office’s share of positive obligations moved from 3.4% to 3.0%, a change of −0.4 percentage points.

    The latest period contains 21 actions across 18 awards and 9 newly active prime contractors. The preceding period contained 10 active prime contractors and 12 awards.

  11. Reported funding office

    ALASKA REGIONAL OFFICE(97000)

    #11Down 6 from #5

    Latest 12 months

    $1.0M

    2.9% of positive obligations

    Versus preceding 12 months

    −$336K

    10 active prime contractors · 13 awards

    View office comparison and evidence

    Reported obligations decreased 25.1% from $1.3M to $1.0M. The office’s share of positive obligations moved from 5.9% to 2.9%, a change of −3.0 percentage points.

    The latest period contains 15 actions across 13 awards and 5 newly active prime contractors. The preceding period contained 7 active prime contractors and 8 awards.

  12. Reported funding office

    NATIONAL OPERATIONS CENTER

    #12Down 10 from #2

    Latest 12 months

    $950K

    2.8% of positive obligations

    Versus preceding 12 months

    −$996K

    4 active prime contractors · 4 awards

    View office comparison and evidence

    Reported obligations decreased 51.2% from $1.9M to $950K. The office’s share of positive obligations moved from 8.6% to 2.8%, a change of −5.8 percentage points.

    The latest period contains 8 actions across 4 awards and 2 newly active prime contractors. The preceding period contained 2 active prime contractors and 2 awards.

  13. Reported funding office

    PWR LAME(81000)

    #21Down 17 from #4

    Latest 12 months

    $387K

    1.1% of positive obligations

    Versus preceding 12 months

    −$1.0M

    12 active prime contractors · 13 awards

    View office comparison and evidence

    Reported obligations decreased 72.4% from $1.4M to $387K. The office’s share of positive obligations moved from 6.2% to 1.1%, a change of −5.1 percentage points.

    The latest period contains 18 actions across 13 awards and 6 newly active prime contractors. The preceding period contained 12 active prime contractors and 13 awards.

    Leading award-level changes

  14. Reported funding office

    MWR NEKOTA(63000)

    #34Down 26 from #8

    Latest 12 months

    $166K

    0.49% of positive obligations

    Versus preceding 12 months

    −$668K

    9 active prime contractors · 10 awards

    View office comparison and evidence

    Reported obligations decreased 80.1% from $834K to $166K. The office’s share of positive obligations moved from 3.7% to 0.49%, a change of −3.2 percentage points.

    The latest period contains 12 actions across 10 awards and 6 newly active prime contractors. The preceding period contained 8 active prime contractors and 9 awards.

  15. Reported funding office

    FWS SOUTHWEST REGIONAL OFFICE

    #48Down 36 from #12

    Latest 12 months

    $87K

    0.25% of positive obligations

    Versus preceding 12 months

    −$481K

    7 active prime contractors · 7 awards

    View office comparison and evidence

    Reported obligations decreased 84.8% from $567K to $87K. The office’s share of positive obligations moved from 2.5% to 0.25%, a change of −2.3 percentage points.

    The latest period contains 8 actions across 7 awards and 6 newly active prime contractors. The preceding period contained 6 active prime contractors and 6 awards.

Contract types, competition, and procurement methods

From Sep 11, 2025 through Sep 10, 2026, 419 awards had positive obligations totaling $34.7M. Simplified Acquisition was the leading reported procedure, accounting for 35.4% of positive obligations. Awards with a reported parent IDV accounted for 1.8%.

Leading award type
59.5%
Definitive Contract
Leading reported procedure
35.4%
Simplified Acquisition
Reported parent IDV
1.8%
of positive obligations had a reported parent IDV
Median reported offers
2
404 of 419 awards reported offers

Same-NAICS comparison

Compared with the NAICS 238220 peer median, parent-IDV obligation share is 25.1 percentage points lower, reported full-and-open obligation share is 4.1 percentage points lower, delivery-order obligation share is 11.9 percentage points lower, and median positive award obligations are 51.7% lower.

MeasureThis marketPeer medianDifference
Parent-IDV obligation share1.8%26.8%-25.1 pts
Reported full-and-open obligation share0%4.1%-4.1 pts
Delivery-order obligation share1.2%13.2%-11.9 pts
Median positive award obligations$20K$41K-51.7%
Peer cohort and comparison limits

The peer median gives each of the 10 eligible agency markets equal weight. The included agency markets are:

Agency mission, scale, and acquisition context can differ. Peer position does not establish market attractiveness or predict a future procurement method.

View buying-method details and data coverage

Award types

Reported valueAwardsPositive obligationsShare
Definitive Contract(D)77$20.7M59.5%
Purchase Order(B)317$13.5M38.8%
Delivery Order(C)15$424K1.2%
BPA Call(A)10$186K0.54%

Reported parent-award types

Reported valueAwardsPositive obligationsShare
IDC(B)15$424K1.2%
BPA(E)10$186K0.54%
Not reported394$34.1M98.2%

Single- or multiple-award parent structure

Reported valueAwardsPositive obligationsShare
Single Award(S)25$611K1.8%
Not reported394$34.1M98.2%

Solicitation procedures

Reported valueAwardsPositive obligationsShare
Simplified Acquisition(SP1)260$12.3M35.4%
Np(NEGOTIATED PROPOSAL/QUOTE)5$6.4M18.6%
Sp1(SIMPLIFIED ACQUISITION)75$4.8M13.9%
Only One Source(SSS)40$3.1M8.9%
Negotiated Proposal/Quote(NP)16$2.6M7.5%
Sb(SEALED BID)3$2.6M7.4%
Other reported values20$2.9M8.3%

Extent competed

Reported valueAwardsPositive obligationsShare
Competed Under SAP(F)201$10.1M29.2%
D(FULL AND OPEN COMPETITION AFTER EXCLUSION OF SOURCES)7$5.1M14.8%
Full and Open Competition After Exclusion of Sources(D)20$4.9M14.1%
F(COMPETED UNDER SAP)66$4.5M12.9%
A(FULL AND OPEN COMPETITION)1$3.9M11.1%
Not Competed Under SAP(G)59$2.2M6.3%
Other reported values65$4.0M11.6%

Fair-opportunity and limited-source reporting

Reported valueAwardsPositive obligationsShare
Not reported419$34.7M100.0%

Other-than-full-and-open reasons

Reported valueAwardsPositive obligationsShare
Authorized by Statute (FAR 6.302-5(A)(2)(I))(OTH)11$2.7M7.8%
SAP Non-Competition (FAR 13)(SP2)58$1.9M5.6%
Only One Source-Other (FAR 6.302-1 Other)(ONE)29$992K2.9%
Urgency (FAR 6.302-2)(URG)20$538K1.6%
Less Than or Equal to the Micro-Purchase Threshold(MPT)6$42K0.12%
Not reported295$28.5M82.1%

Contract pricing types

Reported valueAwardsPositive obligationsShare
Firm Fixed Price(J)318$20.0M57.6%
J(FIRM FIXED PRICE)98$14.2M41.0%
Time and Materials(Y)2$279K0.80%
Y(TIME AND MATERIALS)1$193K0.55%

Product or Service Codes

Reported valueAwardsPositive obligationsShare
Installation of Equipment- Refrigeration, Air Conditioning, and Air Circulating Equipment(N041)24$4.3M12.4%
Maintenance of Other Administrative Facilities and Service Buildings(Z1AZ)2$3.9M11.2%
Maint/Repair/Rebuild of Equipment- Plumbing, Heating, and Waste Disposal Equipment(J045)94$3.5M9.9%
Repair or Alteration of Office Buildings(Z2AA)23$3.0M8.7%
Fuel Burning Equipment Units(4530)14$2.5M7.2%
Maint/Repair/Rebuild of Equipment- Refrigeration, Air Conditioning, and Air Circulating Equipment(J041)49$2.1M6.0%
Other reported values213$15.5M44.6%

Awarding subagencies

Reported valueAwardsPositive obligationsShare
National Park Service(1443)214$24.4M70.2%
Bureau of Indian Affairs and Bureau of Indian Education(1450)51$4.1M11.8%
Bureau of Land Management(1422)28$2.2M6.3%
U.S. Fish and Wildlife Service(1448)79$1.5M4.2%
U.S. Geological Survey(1434)20$1.4M4.0%
Bureau of Reclamation(1425)19$612K1.8%
Other reported values8$575K1.7%

Awarding offices

Reported valueAwardsPositive obligationsShare
Pwr Pore Mabo (84000)(140P84)5$4.0M11.4%
Ner Services Mabo (43000)(140P43)27$3.8M10.9%
Indian Education Acquisition Office(140A23)28$3.0M8.6%
Mwr Midwest Region(60000)(140P60)8$2.4M6.8%
Ner Supply Mabo(45000)(140P45)14$2.3M6.7%
Ncr Regional Contracting(30000)(140P30)11$1.5M4.4%
Other reported values326$17.8M51.2%

Reported parent IDVs

Reported valueAwardsPositive obligationsShare
140P8525D0002(1443)2$109K0.31%
140P8525D0001(1443)3$105K0.30%
140P8525D0003(1443)1$98K0.28%
140R2026A0001(1425)1$88K0.25%
140FS224A0057(1448)2$45K0.13%
140R3020D0006(1425)4$42K0.12%
140P3023D0007(1443)2$34K0.10%
140P1225D0001(1443)2$32K0.090%
Other reported values8$58K0.17%
Not reported394$34.1M98.2%

Offers, award size, and timing

Median reported offers
2 median
404 reported · 15 not reported
Positive award obligations
$20K median
$10K–$64K middle 50%
Reported performance period
118 days (~4 months) median
419 reported · 0 not reported

Calculations group latest-period actions by award, retain awards with positive net obligations for share denominators, and use each award's latest reported USAspending procurement fields as of Sep 10, 2026. Blank competition, pricing, PSC, or parent-IDV values remain not reported; they are not inferred. Offer counts must be positive and below the FPDS 999 placeholder. Awarding organizations can differ from the funding agency that defines this page.

Top federal contractors

Latest 12-month market share, concentration, and complete prime contractor rankings across the period shown.

Prime contractor concentration
69 of 312prime contractors account for at least 80% of positive obligations in the last 12 months
Largest prime contractor
11.1%of positive obligations in the last 12 months
Leading four prime contractors
25.1%of positive obligations in the last 12 months
Leading eight prime contractors
34.7%of positive obligations in the last 12 months

Based on $34.6M in positive obligations during the 12 months ending Sep 10, 2026. Individual shares and movement appear in the searchable rankings below. Movement compares with Sep 11, 2024–Sep 10, 2025.

Last 12mo obligation volume: Highest positive obligations first; net deobligations follow by magnitude; contractors with no activity in the last 12 months follow by all-period obligations. Ranks use the complete contractor list and remain fixed when search narrows the results.

15 leading contractors
  1. #1

    Last 12mo obligations

    $3.9M

    11.1%

    Dollar movement

    +$3.9M

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for G1 CONSTRUCTION, INC.
    Obligations: prior → latest
    $0 → $3.9M
    Not comparable
    Share: prior → latest
    0% → 11.1%
    +11.1 percentage points
    All-period obligations
    $3.9M
    2.7% of all-period positive obligations · 1 award
    Recorded activity
    Since Sep 3, 2026
    through Sep 3, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside10
    Not reported00
    Reported small business10
    All-period set-aside types

    None reported.

  2. #2

    Last 12mo obligations

    $2.0M

    5.8%

    Dollar movement

    +$2.0M

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for DLJ MANAGEMENT SERVICES, LLC
    Obligations: prior → latest
    $0 → $2.0M
    Not comparable
    Share: prior → latest
    0% → 5.8%
    +5.8 percentage points
    All-period obligations
    $2.0M
    1.4% of all-period positive obligations · 1 award
    Recorded activity
    Since Sep 1, 2026
    through Sep 1, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside10
    Reported no set-aside00
    Not reported00
    Reported small business10
    All-period set-aside types
    • 1 · Total small business
  3. #3

    Last 12mo obligations

    $1.6M

    4.6%

    Dollar movement

    +$1.6M

    vs. prior 12 months

    Last 12mo awards

    1 award

    2 actions

    Historical and award details for MCKENZIE CONSTRUCTION & SITE DEVELOPMENT LLC
    Obligations: prior → latest
    $0 → $1.6M
    Not comparable
    Share: prior → latest
    0% → 4.6%
    +4.6 percentage points
    All-period obligations
    $1.6M
    1.1% of all-period positive obligations · 1 award
    Recorded activity
    Since Sep 26, 2025
    through Aug 24, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside10
    Reported no set-aside00
    Not reported00
    Reported small business10
    All-period set-aside types
    • 1 · Total small business
  4. #4

    Last 12mo obligations

    $1.2M

    3.5%

    Dollar movement

    −$722K

    vs. prior 12 months

    Last 12mo awards

    3 awards

    8 actions

    Historical and award details for AXIOM BUILDERS INC
    Obligations: prior → latest
    $1.9M → $1.2M
    −37.4%
    Share: prior → latest
    8.3% → 3.5%
    −4.8 percentage points
    All-period obligations
    $3.1M
    2.2% of all-period positive obligations · 3 awards
    Recorded activity
    Since Jul 28, 2025
    through Jun 17, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside32
    Reported no set-aside00
    Not reported00
    Reported small business32
    All-period set-aside types
    • 3 · Total small business
  5. #5

    Last 12mo obligations

    $1000K

    2.9%

    Dollar movement

    +$1000K

    vs. prior 12 months

    Last 12mo awards

    1 award

    2 actions

    Historical and award details for TAKOTA FLATS-SEG JV LLC
    Obligations: prior → latest
    $0 → $1000K
    Not comparable
    Share: prior → latest
    0% → 2.9%
    +2.9 percentage points
    All-period obligations
    $1000K
    0.71% of all-period positive obligations · 1 award
    Recorded activity
    Since Sep 26, 2025
    through Jul 15, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside10
    Reported no set-aside00
    Not reported00
    Reported small business10
    All-period set-aside types
    • 1 · 8(a) sole source
  6. #6

    Last 12mo obligations

    $893K

    2.6%

    Dollar movement

    +$893K

    vs. prior 12 months

    Last 12mo awards

    2 awards

    6 actions

    Historical and award details for ROCK GAP ENGINEERING LLC
    Obligations: prior → latest
    $0 → $893K
    Not comparable
    Share: prior → latest
    0% → 2.6%
    +2.6 percentage points
    All-period obligations
    $893K
    0.63% of all-period positive obligations · 2 awards
    Recorded activity
    Since Sep 15, 2025
    through Jul 27, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside20
    Reported no set-aside00
    Not reported00
    Reported small business20
    All-period set-aside types
    • 2 · Indian small business
  7. #7

    Last 12mo obligations

    $728K

    2.1%

    Dollar movement

    +$728K

    vs. prior 12 months

    Last 12mo awards

    1 award

    3 actions

    Historical and award details for K&G CONTRACTING SOLUTIONS, INC.
    Obligations: prior → latest
    $0 → $728K
    Not comparable
    Share: prior → latest
    0% → 2.1%
    +2.1 percentage points
    All-period obligations
    $728K
    0.52% of all-period positive obligations · 1 award
    Recorded activity
    Since Sep 25, 2025
    through Aug 5, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside10
    Reported no set-aside00
    Not reported00
    Reported small business10
    All-period set-aside types
    • 1 · Total small business
  8. #8

    Last 12mo obligations

    $687K

    2.0%

    Dollar movement

    +$687K

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for SUPERIOR STRUCTURES LLC
    Obligations: prior → latest
    $0 → $687K
    Not comparable
    Share: prior → latest
    0% → 2.0%
    +2.0 percentage points
    All-period obligations
    $687K
    0.49% of all-period positive obligations · 1 award
    Recorded activity
    Since Aug 24, 2026
    through Aug 24, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside10
    Reported no set-aside00
    Not reported00
    Reported small business10
    All-period set-aside types
    • 1 · SDVOSB set-aside
  9. #9

    Last 12mo obligations

    $649K

    1.9%

    Dollar movement

    +$649K

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for VEDANT CONSTRUCTION INC
    Obligations: prior → latest
    $0 → $649K
    Not comparable
    Share: prior → latest
    0% → 1.9%
    +1.9 percentage points
    All-period obligations
    $649K
    0.46% of all-period positive obligations · 1 award
    Recorded activity
    Since Aug 21, 2026
    through Aug 21, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside10
    Reported no set-aside00
    Not reported00
    Reported small business10
    All-period set-aside types
    • 1 · Total small business
  10. #10

    Last 12mo obligations

    $622K

    1.8%

    Dollar movement

    +$622K

    vs. prior 12 months

    Last 12mo awards

    1 award

    2 actions

    Historical and award details for DAP MANAGEMENT GROUP, LLC
    Obligations: prior → latest
    $0 → $622K
    Not comparable
    Share: prior → latest
    0% → 1.8%
    +1.8 percentage points
    All-period obligations
    $622K
    0.44% of all-period positive obligations · 1 award
    Recorded activity
    Since Mar 18, 2026
    through Apr 30, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside10
    Reported no set-aside00
    Not reported00
    Reported small business10
    All-period set-aside types
    • 1 · Indian small business
  11. #11

    Last 12mo obligations

    $583K

    1.7%

    Dollar movement

    −$52K

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for MASSILLON CONSTRUCTION AND SUPPLY LLC
    Obligations: prior → latest
    $635K → $583K
    −8.1%
    Share: prior → latest
    2.8% → 1.7%
    −1.1 percentage points
    All-period obligations
    $1.6M
    1.1% of all-period positive obligations · 3 awards
    Recorded activity
    Since May 21, 2024
    through Jun 9, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside12
    Reported no set-aside00
    Not reported00
    Reported small business12
    All-period set-aside types
    • 2 · Total small business
    • 1 · WOSB set-aside
  12. #12

    Last 12mo obligations

    $574K

    1.7%

    Dollar movement

    +$574K

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for PROFICIENT CONSTRUCTORS LLC.
    Obligations: prior → latest
    $0 → $574K
    Not comparable
    Share: prior → latest
    0% → 1.7%
    +1.7 percentage points
    All-period obligations
    $574K
    0.41% of all-period positive obligations · 1 award
    Recorded activity
    Since Sep 18, 2025
    through Sep 18, 2025

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside10
    Reported no set-aside00
    Not reported00
    Reported small business10
    All-period set-aside types
    • 1 · 8(a) sole source
  13. #13

    Last 12mo obligations

    $568K

    1.6%

    Dollar movement

    +$575K

    vs. prior 12 months

    Last 12mo awards

    2 awards

    5 actions

    Historical and award details for REAGENT WORLD, INC.
    Obligations: prior → latest
    −$7K → $568K
    Not comparable
    Share: prior → latest
    0% → 1.6%
    +1.6 percentage points
    All-period obligations
    $1.2M
    0.85% of all-period positive obligations · 11 awards
    Recorded activity
    Since Aug 12, 2022
    through Aug 11, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside22
    Reported no set-aside00
    Not reported00
    Reported small business22
    All-period set-aside types
    • 8 · Total small business
  14. #14

    Last 12mo obligations

    $549K

    1.6%

    Dollar movement

    +$367K

    vs. prior 12 months

    Last 12mo awards

    4 awards

    5 actions

    Historical and award details for TAYLOR FIRE PROTECTION SERVICES LLC
    Obligations: prior → latest
    $182K → $549K
    +202.0%
    Share: prior → latest
    0.79% → 1.6%
    +0.8 percentage points
    All-period obligations
    $993K
    0.71% of all-period positive obligations · 6 awards
    Recorded activity
    Since Oct 25, 2021
    through Aug 6, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside42
    Reported no set-aside00
    Not reported00
    Reported small business42
    All-period set-aside types
    • 6 · Total small business
  15. #15

    Last 12mo obligations

    $467K

    1.4%

    Dollar movement

    +$203K

    vs. prior 12 months

    Last 12mo awards

    4 awards

    8 actions

    Historical and award details for AGAPE ENCOUNTERS, LLC
    Obligations: prior → latest
    $264K → $467K
    +76.7%
    Share: prior → latest
    1.1% → 1.4%
    +0.2 percentage points
    All-period obligations
    $1.2M
    0.83% of all-period positive obligations · 11 awards
    Recorded activity
    Since Dec 28, 2021
    through Feb 23, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside43
    Reported no set-aside00
    Not reported00
    Reported small business43
    All-period set-aside types
    • 11 · Total small business

Recent federal contract award activity

Recent contract actions with unusually large obligation changes or meaningful shifts in contractor and funding-office activity.

Base award

This action

+$3.9M

G1 CONSTRUCTION, INC.

PWR PORE MABO (84000)

REHABILITATE HVAC SYSTEM COMPONENTS AT PARK HEADQUARTERS (HQ) AND NORTH OPERATIONS CENTER (NOC), REDWOOD NATIONAL AND STATE PARKS, DEL NORTE COUNTY, CALIFORNIA.

Why it stands out

No activity for this contractor was reported in this market during the preceding 12 months.

The base action placed the contractor #1 in this market by positive obligations over the latest 12 months.

Award net obligations
$3.9M
Share of 12-month positive obligations
11.1%
Supporting data
Prime contractor
#1 · 11.1% share
Newly active in this market; no actions were reported in the preceding 12 months
Funding office
#1 · 11.6% attributed share
up 22 ranks · +10.4 percentage points · $3.7M net increase; action exceeded it by $168K
Related:Funding office gain
PIID 140P8426C0001
Base award

This action

+$2.0M

DLJ MANAGEMENT SERVICES, LLC

MWR MIDWEST REGION(60000)

JEFF REPLACE COOLING TOWER AND BOILER

Why it stands out

No activity for this contractor was reported in this market during the preceding 12 months.

The base action placed the contractor #2 in this market by positive obligations over the latest 12 months.

Award net obligations
$2.0M
Share of 12-month positive obligations
5.8%
Supporting data
Prime contractor
#2 · 5.8% share
Newly active in this market; no actions were reported in the preceding 12 months
Funding office
#4 · 7.0% attributed share
up 9 ranks · +4.8 percentage points · $1.9M net increase; action exceeded it by $139K
PIID 140P6026C0011
Base award

This action

+$1.6M

MCKENZIE CONSTRUCTION & SITE DEVELOPMENT LLC

NER SUPPLY MABO(45000)

140P4525C0029: REHABILITATE MECHANICAL SYSTEM, STEAMTOWN NATIONAL HISTORIC SITE, SCRANTON, PA

Why it stands out

No activity for this contractor was reported in this market during the preceding 12 months.

The base action placed the contractor #3 in this market by positive obligations over the latest 12 months.

Award net obligations
$1.6M
Share of 12-month positive obligations
4.6%
Supporting data
Prime contractor
#3 · 4.6% share
Newly active in this market; no actions were reported in the preceding 12 months
Funding office
#5 · 6.8% attributed share
up 1 rank · +2.2 percentage points · $1.3M net increase; action exceeded it by $305K
Related:Newly observed contractor cohortLargest newly observed contractor
PIID 140P4525C0029
Base award

This action

+$1000K

TAKOTA FLATS-SEG JV LLC

NCR REGIONAL CONTRACTING(30000)

NACE - REPAIR FIRE ALARM + SUPPRESSION A

Why it stands out

No activity for this contractor was reported in this market during the preceding 12 months.

The base action placed the contractor #5 in this market by positive obligations over the latest 12 months.

Award net obligations
$1000K
Share of 12-month positive obligations
2.9%
Supporting data
Prime contractor
#5 · 2.9% share
Newly active in this market; no actions were reported in the preceding 12 months
Funding office
#6 · 4.7% attributed share
$305K net decline despite this positive action
Related:Newly observed contractor cohort
PIID 140P3025C0021
Base award

This action

+$713K

ROCK GAP ENGINEERING LLC

INDIAN EDUCATION ACQUISITION OFFICE

INSTALL DIRECT DIGITAL CONTROLS

Why it stands out

No activity for this contractor was reported in this market during the preceding 12 months.

The base action placed the contractor #6 in this market by positive obligations over the latest 12 months.

Award net obligations
$713K
Share of 12-month positive obligations
2.1%
Supporting data
Prime contractor
#6 · 2.6% share
Newly active in this market; no actions were reported in the preceding 12 months
Funding office
#3 · 8.8% attributed share
up 4 ranks · +4.3 percentage points · $2.0M net increase; action accounted for 36.1%
Related:Newly observed contractor cohort
PIID 140A2325C0014
Base award

This action

+$574K

PROFICIENT CONSTRUCTORS LLC.

IMR SANTA FE(12100)

LYNDON B JOHNSON NHP - REPLACE HVAC CHILLER SBA REQUIREMENT #OO1749570443C

Why it stands out

No activity for this contractor was reported in this market during the preceding 12 months.

The base action placed the contractor #12 in this market by positive obligations over the latest 12 months.

Award net obligations
$574K
Share of 12-month positive obligations
1.7%
Supporting data
Prime contractor
#12 · 1.7% share
Newly active in this market; no actions were reported in the preceding 12 months
Funding office
#15 · 1.8% attributed share
up 43 ranks · +1.7 percentage points · $577K net increase; action accounted for 99.5%
PIID 140P1325C0003
View recent award activity by date (10)
  1. TANAUAN GLOBAL LLCBase award · PIID 140P4326C0028
    Action+$175K
    Award net obligations$175K
  2. ALDEVRA LLCModification · PIID 140D0425P0156
    Action+$98K
    Award net obligations$193K
  3. CHONG'S CORPORATIONBase award · PIID 140P8226P0032
    Action+$17K
    Award net obligations$17K
  4. CLASS CONTRACTING LLCBase award · PIID 140R3026F0090
    Action+$15K
    Award net obligations$15K
  5. WOLFGUARD SOLUTIONS LLCBase award · PIID 140A2326P0364
    Action+$169K
    Award net obligations$169K
  6. PATRICK'S PLUMBING & HEATING, INC.Base award · PIID 140P6426P0069
    Action+$48K
    Award net obligations$48K
  7. XION CONSTRUCTION COMPANY L.L.C.Base award · PIID 140L4326P0124
    Action+$32K
    Award net obligations$32K
  8. TECH O. R., LLCModification · PIID 140A1126P0046
    Action+$31K
    Award net obligations$71K
  9. AMERICAN CHILLER SERVICE, INC.Modification · PIID 140FS123P0236
    Action+$12K
    Award net obligations$49K
  10. TJ&B AIR CONDITIONING AND ELECTRIC, LLCBase award · PIID 140P5426C0017
    Action+$166K
    Award net obligations$166K

DOI plumbing, heating, and air-conditioning market FAQs

Answers based on reported federal contract data.

Who are the top DOI plumbing, heating, and air-conditioning contractors?

In the 12 months through September 10, 2026, G1 CONSTRUCTION, INC., DLJ MANAGEMENT SERVICES, LLC, and MCKENZIE CONSTRUCTION & SITE DEVELOPMENT LLC were the leading DOI plumbing, heating, and air-conditioning prime contractors by positive obligations.

  1. #1

    G1 CONSTRUCTION, INC.

    $3,853,908 in positive obligations

  2. #2

    DLJ MANAGEMENT SERVICES, LLC

    $2,024,048 in positive obligations

  3. #3

    MCKENZIE CONSTRUCTION & SITE DEVELOPMENT LLC

    $1,600,392 in positive obligations

Rankings use reported USAspending award data.

Did DOI contract obligations increase in the plumbing, heating, and air-conditioning market?

Yes. Measured by net prime contract obligations, reported DOI activity in the plumbing, heating, and air-conditioning market increased 51.5% from $22,458,404 in the preceding 12 months to $34,019,667 in the 12 months through September 10, 2026.

Latest 12 months
$34,019,667
Net prime contract obligations
Preceding 12 months
$22,458,404
Net prime contract obligations
Change
+51.5%
Between matched 12-month periods

Reported contract actions, not outlays or a forecast.

What recent DOI contract award activity was reported in the plumbing, heating, and air-conditioning market?

Recent DOI contract award activity reported in the plumbing, heating, and air-conditioning market included actions for G1 CONSTRUCTION, INC., DLJ MANAGEMENT SERVICES, LLC, and MCKENZIE CONSTRUCTION & SITE DEVELOPMENT LLC during the 12 months through September 10, 2026.

Action obligations are transaction-level amounts, not current award-level obligations.

Which procurement methods were reported for DOI contracts under NAICS 238220?

From September 11, 2025 through September 10, 2026, DOI reported 419 positive-obligation awards for plumbing, heating, and air-conditioning under NAICS 238220. The leading award type was definitive contract. The leading reported procedure was simplified acquisition.

Positive-obligation awards
419
Leading reported procedure
Simplified Acquisition
35.4% of positive obligations
Leading award type
Definitive Contract
59.5% of positive obligations
Full and open
0%
of positive obligations
Reported parent IDV
1.8%
of positive obligations

Percentages use positive obligations as the denominator.

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Related market research

Complete market indexes:

Same NAICS at other agencies:

Nearby NAICS at this agency:

Markets sharing leading prime records:

Leading-prime vehicle memberships:

Company memberships do not establish award-channel use.

Reported obligations include contract actions from October 1, 2021 through September 10, 2026. Set-aside and business-size fields reflect award records, not a contractor's current eligibility.

Review data methodology