Federal Capture Intelligence

Top DOT environmental consulting contractors (NAICS 541620)

Contract actions: October 1, 2021 – September 10, 2026 Updated September 11, 2026 Department of Transportation agency guide NAICS 541620 · Environmental Consulting Services
Latest 12 months
$14.7M
Net obligations · Down $19.7M vs. $34.5M preceding
Prime contractors
32
With positive obligations in the latest 12 months

Research the DOT federal contracting market for environmental consulting under NAICS 541620. 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 environmental consulting at the Department of Transportation

Federal records show $94.1M in net obligations across 360 awards in environmental consulting at the Department of Transportation from Oct 1, 2021 through Sep 10, 2026. This market accounts for 0.22% of $42.9B in agency-wide net prime contract obligations over the period shown. Latest 12-month net obligations decreased 57.3% from $34.5M to $14.7M. 9 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: $10.1M versus $30.5M through the same date in FY25 (−66.8%).
Net obligations · complete fiscal yearNet obligations · FY26 YTDContract actions
View fiscal-year data table
Fiscal yearNet obligationsContract actionsCoverage
FY2022$11.9M158Complete
FY2023$13.4M172Complete
FY2024$23.5M176Complete
FY2025$35.1M190Complete
FY2026$10.1M139YTD through Sep 10, 2026

Market at a glance

All reported prime contract awards
All-period net obligations
$94.1M
360 awards · 118 prime contractors
Latest 12-month movement
−57.3%
$14.7M vs. $34.5M
Leading eight prime share
77.6%
Share held by the eight leading prime contractors in the latest 12 months
View agency share, denominators, and set-aside reporting
Agency context
0.22% of $42.9B in agency-wide net obligations.
Set-aside share when reported
40.5% of 111 awards with reported set-aside status.
Set-aside reporting
45 set aside · 66 no set-aside · 249 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

WESTON SOLUTIONS INC lost the most market share
13.90%→3.55%−10.3 percentage points
The contractor now ranks #10 by positive obligations, based on 7 reported actions.
PACIFIC WESTERN TECHNOLOGIES, LTD. gained the most market share
2.1%→10.7%+8.6 percentage points
The contractor now ranks #4 by positive obligations, based on 4 reported actions.
ABSG CONSULTING INC had no reported activity in the latest 12 months
$11.6M→$0No latest-period activity
It previously ranked #1 by positive obligations, based on 2 reported actions.

Market structure

Top-five contractor share decreased
79.6%→60.6%−19.0 percentage points
Contractors outside the top five now account for 39.4% of positive obligations.
This market declined more steeply than 99.0% of comparable agency NAICS markets
−57.3%Agency median +28.7%
The agency comparison covers 52 comparable NAICS markets.

Buyer demand

Reported obligations through 6973GH FRANCHISE ACQUISITION SVCS decreased
$2.8M→$534K−$2.3M
Latest-period activity spans 5 awards across 1 prime contractor.
View 1 additional material change

Buyer demand

Reported obligations through FHWA - TURNER-FAIRBANKS HIGHWAY increased
$194K→$1.9M+$1.7M
Latest-period activity spans 2 awards across 2 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.

15.3% of positive obligations were attributed to FAA. That represents $2.3M, up $410K from the preceding 12 months.

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

  1. FAA15.3% · $2.3M · up $410K
  2. FHWA OFFICE OF INFRASTRUCTURE14.9% · $2.2M · up $2.2M
  3. FHWA - EASTERN FEDERAL LANDS DIVISI12.8% · $1.9M · up $796K
  4. FHWA - TURNER-FAIRBANKS HIGHWAY12.5% · $1.9M · up $1.7M
  5. 693KA9 CONTRACTING FOR SERVICES7.7% · $1.1M · down $316K
  6. All other reported offices36.8% 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

    FAA

    #1Up 4 from #5

    Latest 12 months

    $2.3M

    15.3% of positive obligations

    Versus preceding 12 months

    +$410K

    8 active prime contractors · 32 awards

    View office comparison and evidence

    Reported obligations increased 22.1% from $1.9M to $2.3M. The office’s share of positive obligations moved from 5.3% to 15.3%, a change of +9.9 percentage points.

    The latest period contains 44 actions across 32 awards and 2 newly active prime contractors. The preceding period contained 8 active prime contractors and 26 awards.

  2. Reported funding office

    FHWA OFFICE OF INFRASTRUCTURE

    #2New to the positive-obligation ranking

    Latest 12 months

    $2.2M

    14.9% of positive obligations

    Versus preceding 12 months

    +$2.2M

    1 active prime contractor · 1 award

    View office comparison and evidence

    Reported obligations rose from $0 to $2.2M. The office’s share of positive obligations moved from 0% to 14.9%, a change of +14.9 percentage points.

    The latest period contains 3 actions across 1 award and 1 newly active prime contractor. The preceding period contained 0 active prime contractors and 0 awards.

    Leading award-level changes

  3. Reported funding office

    FHWA - EASTERN FEDERAL LANDS DIVISI

    #3Up 5 from #8

    Latest 12 months

    $1.9M

    12.8% of positive obligations

    Versus preceding 12 months

    +$796K

    9 active prime contractors · 10 awards

    View office comparison and evidence

    Reported obligations increased 72.0% from $1.1M to $1.9M. The office’s share of positive obligations moved from 3.2% to 12.8%, a change of +9.6 percentage points.

    The latest period contains 19 actions across 10 awards and 2 newly active prime contractors. The preceding period contained 11 active prime contractors and 14 awards.

  4. Reported funding office

    FHWA - TURNER-FAIRBANKS HIGHWAY

    #4Up 9 from #13

    Latest 12 months

    $1.9M

    12.5% of positive obligations

    Versus preceding 12 months

    +$1.7M

    2 active prime contractors · 2 awards

    View office comparison and evidence

    Reported obligations increased 858.8% from $194K to $1.9M. The office’s share of positive obligations moved from 0.56% to 12.5%, a change of +11.9 percentage points.

    The latest period contains 3 actions across 2 awards and 1 newly active prime contractor. The preceding period contained 1 active prime contractor and 1 award.

  5. Reported funding office

    693KA9 CONTRACTING FOR SERVICES

    #5Up 2 from #7

    Latest 12 months

    $1.1M

    7.7% of positive obligations

    Versus preceding 12 months

    −$316K

    1 active prime contractor · 1 award

    View office comparison and evidence

    Reported obligations decreased 21.6% from $1.5M to $1.1M. The office’s share of positive obligations moved from 4.2% to 7.7%, a change of +3.5 percentage points.

    The latest period contains 6 actions across 1 award. The preceding period contained 1 active prime contractor and 1 award.

  6. Reported funding office

    693JF7 DOT MARITIME ADMINISTRATION

    #6Up 5 from #11

    Latest 12 months

    $1.1M

    7.2% of positive obligations

    Versus preceding 12 months

    +$521K

    2 active prime contractors · 2 awards

    View office comparison and evidence

    Reported obligations increased 96.4% from $540K to $1.1M. The office’s share of positive obligations moved from 1.6% to 7.2%, a change of +5.6 percentage points.

    The latest period contains 6 actions across 2 awards and 1 newly active prime contractor. The preceding period contained 2 active prime contractors and 2 awards.

  7. Reported funding office

    6982AF CENTRAL FEDERAL LANDS DIVISI

    #7Up 10 from #17

    Latest 12 months

    $991K

    6.7% of positive obligations

    Versus preceding 12 months

    +$946K

    2 active prime contractors · 9 awards

    View office comparison and evidence

    Reported obligations increased 2126.2% from $45K to $991K. The office’s share of positive obligations moved from 0.13% to 6.7%, a change of +6.5 percentage points.

    The latest period contains 11 actions across 9 awards and 1 newly active prime contractor. The preceding period contained 2 active prime contractors and 5 awards.

  8. Reported funding office

    FHWA OFFICE OF OPERATIONS

    #8Down 2 from #6

    Latest 12 months

    $895K

    6.0% of positive obligations

    Versus preceding 12 months

    −$874K

    2 active prime contractors · 8 awards

    View office comparison and evidence

    Reported obligations decreased 49.4% from $1.8M to $895K. The office’s share of positive obligations moved from 5.1% to 6.0%, a change of +0.9 percentage points.

    The latest period contains 10 actions across 8 awards and 1 newly active prime contractor. The preceding period contained 1 active prime contractor and 9 awards.

  9. Reported funding office

    693JK3 ACQUISITION SERVICES DIV.

    #9New to the positive-obligation ranking

    Latest 12 months

    $674K

    4.5% of positive obligations

    Versus preceding 12 months

    +$674K

    2 active prime contractors · 2 awards

    View office comparison and evidence

    Reported obligations rose from $0 to $674K. The office’s share of positive obligations moved from 0% to 4.5%, a change of +4.5 percentage points.

    The latest period contains 6 actions across 2 awards and 1 newly active prime contractor. The preceding period contained 1 active prime contractor and 1 award.

  10. Reported funding office

    6973GH FRANCHISE ACQUISITION SVCS

    #10Down 8 from #2

    Latest 12 months

    $534K

    3.6% of positive obligations

    Versus preceding 12 months

    −$2.3M

    1 active prime contractor · 5 awards

    View office comparison and evidence

    Reported obligations decreased 81.1% from $2.8M to $534K. The office’s share of positive obligations moved from 8.1% to 3.6%, a change of −4.5 percentage points.

    The latest period contains 7 actions across 5 awards. The preceding period contained 1 active prime contractor and 7 awards.

  11. Reported funding office

    693195 OFFICE OF ACQUISITION MGT

    #11Down 8 from #3

    Latest 12 months

    $455K

    3.1% of positive obligations

    Versus preceding 12 months

    −$2.0M

    1 active prime contractor · 4 awards

    View office comparison and evidence

    Reported obligations decreased 81.6% from $2.5M to $455K. The office’s share of positive obligations moved from 7.1% to 3.1%, a change of −4.0 percentage points.

    The latest period contains 5 actions across 4 awards. The preceding period contained 1 active prime contractor and 3 awards.

  12. Reported funding office

    6973GJ NON-FRANCHISE ACQ SVC

    No positive-obligation rank

    Latest 12 months

    $0

    0% of positive obligations

    Versus preceding 12 months

    −$2.1M

    0 active prime contractors · 0 awards

    View office comparison and evidence

    Reported obligations decreased 100.0% from $2.1M to $0. The office’s share of positive obligations moved from 6.0% to 0%, a change of −6.0 percentage points.

    The latest period contains 0 actions across 0 awards. The preceding period contained 1 active prime contractor and 4 awards.

  13. Reported funding office

    FHWA OFC OF PLANNING, ENVIRONMENT

    No positive-obligation rank

    Latest 12 months

    −$122K

    0% of positive obligations

    Versus preceding 12 months

    −$18.7M

    1 active prime contractor · 3 awards

    View office comparison and evidence

    Reported obligations moved from $18.6M in net obligations to $122K in net deobligations. The office’s share of positive obligations moved from 53.5% to 0%, a change of −53.5 percentage points.

    The latest period contains 3 actions across 3 awards. The preceding period contained 7 active prime contractors and 16 awards.

    Leading award-level changes

Contract types, competition, and procurement methods

From Sep 11, 2025 through Sep 10, 2026, 45 awards had positive obligations totaling $15.2M. Subject to Multiple Award Fair Opportunity was the leading reported procedure, accounting for 34.8% of positive obligations. Awards with a reported parent IDV accounted for 78.9%.

Leading award type
54.8%
Delivery Order
Leading reported procedure
34.8%
Subject to Multiple Award Fair Opportunity
Reported parent IDV
78.9%
of positive obligations had a reported parent IDV
Median reported offers
1
30 of 45 awards reported offers

Buying method changes

Compared with Sep 11, 2024–Sep 10, 2025. Based on 45 current awards and 72 preceding awards with positive net obligations.

Multiple-award parent obligation share
49.0%
Up from 6.5% in the preceding period
Reported full-and-open obligation share
52.9%
Down from 85.3% in the preceding period
How to read these changes

Directional color and the Up or Down labels show historical movement only. Green does not mean favorable and red does not mean unfavorable; neither predicts a future procurement method.

Same-NAICS comparison

Compared with the NAICS 541620 peer median, parent-IDV obligation share is 4.8 percentage points lower, reported full-and-open obligation share is 12.5 percentage points higher, delivery-order obligation share is 0.1 percentage points lower, and median positive award obligations are 25.3% lower.

MeasureThis marketPeer medianDifference
Parent-IDV obligation share78.9%83.7%-4.8 pts
Reported full-and-open obligation share52.9%40.3%+12.5 pts
Delivery-order obligation share54.8%54.9%-0.1 pts
Median positive award obligations$115K$154K-25.3%
Peer cohort and comparison limits

The peer median gives each of the 12 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
Delivery Order(C)20$8.3M54.8%
BPA Call(A)6$3.7M24.1%
Definitive Contract(D)4$1.9M12.5%
Purchase Order(B)15$1.3M8.6%

Reported parent-award types

Reported valueAwardsPositive obligationsShare
FSS(C)7$4.4M29.1%
IDC(B)13$3.9M25.7%
BPA(E)6$3.7M24.1%
Not reported19$3.2M21.1%

Single- or multiple-award parent structure

Reported valueAwardsPositive obligationsShare
Multiple Award(M)10$7.5M49.0%
Single Award(S)16$4.5M29.9%
Not reported19$3.2M21.1%

Solicitation procedures

Reported valueAwardsPositive obligationsShare
Subject to Multiple Award Fair Opportunity(MAFO)9$5.3M34.8%
Mafo(SUBJECT TO MULTIPLE AWARD FAIR OPPORTUNITY)3$2.8M18.3%
Negotiated Proposal/Quote(NP)9$2.2M14.7%
Only One Source(SSS)4$1.4M9.0%
Sss(ONLY ONE SOURCE)1$1.1M7.5%
Sp1(SIMPLIFIED ACQUISITION)5$978K6.4%
Other reported values14$1.4M9.2%

Extent competed

Reported valueAwardsPositive obligationsShare
Full and Open Competition(A)20$8.0M52.9%
A(FULL AND OPEN COMPETITION)5$2.9M19.1%
C(NOT COMPETED)1$1.1M7.5%
Not Available for Competition(B)1$1.0M6.7%
G(NOT COMPETED UNDER SAP)3$816K5.4%
Not Competed Under SAP(G)6$540K3.5%
Other reported values9$747K4.9%

Fair-opportunity and limited-source reporting

Reported valueAwardsPositive obligationsShare
Fair Opportunity Given(FAIR)6$5.3M34.6%
Competitive Set Aside(CSA)2$2.0M13.4%
Only One Source - Other(ONE)4$766K5.0%
Not reported33$7.1M46.9%

Other-than-full-and-open reasons

Reported valueAwardsPositive obligationsShare
Authorized by Statute (FAR 6.302-5(A)(2)(I))(OTH)4$1.8M11.7%
Only One Source-Other (FAR 6.302-1 Other)(ONE)3$1.2M8.2%
SAP Non-Competition (FAR 13)(SP2)6$604K4.0%
Mobilization, Essential R&d (FAR 6.302-3)(MES)1$257K1.7%
Not reported31$11.3M74.5%

Contract pricing types

Reported valueAwardsPositive obligationsShare
Firm Fixed Price(J)32$9.8M64.2%
J(FIRM FIXED PRICE)9$3.3M21.9%
Y(TIME AND MATERIALS)1$1.1M7.5%
Z(LABOR HOURS)1$539K3.5%
Time and Materials(Y)1$408K2.7%
Labor Hours(Z)1$15K0.10%

Product or Service Codes

Reported valueAwardsPositive obligationsShare
Support- Professional: Engineering/Technical(R425)9$4.5M29.5%
Other Environmental Services(F999)4$2.4M16.1%
Support- Professional: Other(R499)2$2.3M15.0%
Support- Professional: Policy Review/Development(R406)1$1.1M7.5%
Inspection- Ship and Marine Equipment(H320)1$1.0M6.7%
Transportation R&d Svcs; Surface Transportation, Public Transit, & Rail; Experimental Development(AS13)2$813K5.3%
Other reported values26$3.0M19.8%

Awarding subagencies

Reported valueAwardsPositive obligationsShare
Federal Highway Administration(6925)14$8.1M53.2%
Federal Aviation Administration(6920)18$4.3M28.5%
Maritime Administration(6938)3$1.1M7.1%
Pipeline and Hazardous Materials Safety Administration(6957)1$674K4.4%
Federal Transit Administration(6955)1$539K3.5%
Immediate Office of the Secretary of Transportation(6901)8$493K3.2%

Awarding offices

Reported valueAwardsPositive obligationsShare
693jj3 Acquisition and Grants Mgt(693JJ3)5$5.0M32.7%
692m15 Acquisition & Grants, Aaq600(692M15)9$2.4M16.1%
693c73 Eastern Fed Lands Division(693C73)4$2.0M12.9%
693ka9 Contracting for Services(693KA9)1$1.1M7.5%
693jf7 Dot Maritime Administration(693JF7)2$1.1M7.0%
6982af Central Federal Lands Divisi(6982AF)4$999K6.6%
Other reported values20$2.6M17.2%

Reported parent IDVs

Reported valueAwardsPositive obligationsShare
DTFACT17D00008(6920)8$2.3M14.9%
693JJ324A000007(6925)1$2.2M14.6%
47QRAA18D008A(4732)1$1.9M12.2%
47QRAA21D005V(4732)1$1.6M10.6%
693JF722D000004(6938)1$1.0M6.7%
693JJ324A000009(6925)2$813K5.3%
47QRAA19D000Q(4732)3$742K4.9%
69319524A000011(6955)1$539K3.5%
Other reported values8$932K6.1%
Not reported19$3.2M21.1%

Offers, award size, and timing

Median reported offers
1 median
30 reported · 15 not reported
Positive award obligations
$115K median
$58K–$405K middle 50%
Reported performance period
371 days (~12 months) median
45 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
9 of 32prime contractors account for at least 80% of positive obligations in the last 12 months
Largest prime contractor
15.3%of positive obligations in the last 12 months
Leading four prime contractors
53.0%of positive obligations in the last 12 months
Leading eight prime contractors
77.6%of positive obligations in the last 12 months

Based on $15.0M 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

    $2.3M

    15.3%

    Dollar movement

    −$81K

    vs. prior 12 months

    Last 12mo awards

    8 awards

    11 actions

    Historical and award details for WSP USA SOLUTIONS INC
    Obligations: prior → latest
    $2.4M → $2.3M
    −3.4%
    Share: prior → latest
    6.7% → 15.3%
    +8.5 percentage points
    All-period obligations
    $18.2M
    19.3% of all-period positive obligations · 18 awards
    Recorded activity
    Since Aug 16, 2022
    through Aug 18, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported813
    Reported small business00
    All-period set-aside types

    None reported.

  2. #2

    Last 12mo obligations

    $2.2M

    14.7%

    Dollar movement

    −$419

    vs. prior 12 months

    Last 12mo awards

    24 awards

    25 actions

    Historical and award details for TRC ENVIRONMENTAL CORPORATION
    Obligations: prior → latest
    $2.2M → $2.2M
    −0.0%
    Share: prior → latest
    6.2% → 14.7%
    +8.4 percentage points
    All-period obligations
    $11.4M
    12.1% of all-period positive obligations · 86 awards
    Recorded activity
    Since Dec 22, 2021
    through Aug 28, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported2422
    Reported small business00
    All-period set-aside types

    None reported.

  3. #3

    Last 12mo obligations

    $1.9M

    12.3%

    Dollar movement

    +$2.0M

    vs. prior 12 months

    Last 12mo awards

    1 award

    2 actions

    Historical and award details for NICHOLS CONSULTING ENGINEERS CHTD
    Obligations: prior → latest
    −$185K → $1.9M
    Not comparable
    Share: prior → latest
    0% → 12.3%
    +12.3 percentage points
    All-period obligations
    $2.7M
    2.8% of all-period positive obligations · 4 awards
    Recorded activity
    Since Nov 4, 2021
    through Feb 24, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside10
    Reported no set-aside00
    Not reported02
    Reported small business12
    All-period set-aside types
    • 2 · Total small business
  4. #4

    Last 12mo obligations

    $1.6M

    10.7%

    Dollar movement

    +$882K

    vs. prior 12 months

    Last 12mo awards

    1 award

    4 actions

    Historical and award details for PACIFIC WESTERN TECHNOLOGIES, LTD.
    Obligations: prior → latest
    $728K → $1.6M
    +121.1%
    Share: prior → latest
    2.1% → 10.7%
    +8.6 percentage points
    All-period obligations
    $4.4M
    4.7% of all-period positive obligations · 2 awards
    Recorded activity
    Since Feb 28, 2022
    through Jul 10, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported11
    Reported small business11
    All-period set-aside types

    None reported.

  5. #5

    Last 12mo obligations

    $1.1M

    7.6%

    Dollar movement

    −$145K

    vs. prior 12 months

    Last 12mo awards

    1 award

    7 actions

    Historical and award details for ICF INCORPORATED, L.L.C.
    Obligations: prior → latest
    $1.3M → $1.1M
    −11.2%
    Share: prior → latest
    3.6% → 7.6%
    +4.0 percentage points
    All-period obligations
    $5.3M
    5.6% of all-period positive obligations · 13 awards
    Recorded activity
    Since Jan 24, 2022
    through Sep 8, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside11
    Not reported04
    Reported small business00
    All-period set-aside types

    None reported.

  6. #6

    Last 12mo obligations

    $1.0M

    6.8%

    Dollar movement

    +$450K

    vs. prior 12 months

    Last 12mo awards

    1 award

    2 actions

    Historical and award details for SUSTAINABLE DESIGN CONSORTIUM, (SDC) INC
    Obligations: prior → latest
    $570K → $1.0M
    +78.9%
    Share: prior → latest
    1.6% → 6.8%
    +5.2 percentage points
    All-period obligations
    $4.8M
    5.1% of all-period positive obligations · 1 award
    Recorded activity
    Since Jul 13, 2022
    through Jul 9, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported11
    Reported small business11
    All-period set-aside types

    None reported.

  7. #7

    Last 12mo obligations

    $813K

    5.4%

    Dollar movement

    +$813K

    vs. prior 12 months

    Last 12mo awards

    2 awards

    4 actions

    Historical and award details for CDM FEDERAL PROGRAMS CORPORATION
    Obligations: prior → latest
    $0 → $813K
    Not comparable
    Share: prior → latest
    0% → 5.4%
    +5.4 percentage points
    All-period obligations
    $813K
    0.86% of all-period positive obligations · 3 awards
    Recorded activity
    Since Sep 15, 2023
    through Apr 28, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported20
    Reported small business00
    All-period set-aside types

    None reported.

  8. #8

    Last 12mo obligations

    $734K

    4.9%

    Dollar movement

    +$517K

    vs. prior 12 months

    Last 12mo awards

    8 awards

    9 actions

    Historical and award details for STANTEC CONSULTING SERVICES INC.
    Obligations: prior → latest
    $217K → $734K
    +238.2%
    Share: prior → latest
    0.61% → 4.9%
    +4.3 percentage points
    All-period obligations
    $2.1M
    2.2% of all-period positive obligations · 15 awards
    Recorded activity
    Since Jan 19, 2022
    through Aug 5, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported84
    Reported small business00
    All-period set-aside types

    None reported.

  9. #9

    Last 12mo obligations

    $674K

    4.5%

    Dollar movement

    +$674K

    vs. prior 12 months

    Last 12mo awards

    1 award

    5 actions

    Historical and award details for GSI HAWAII INC
    Obligations: prior → latest
    $0 → $674K
    Not comparable
    Share: prior → latest
    0% → 4.5%
    +4.5 percentage points
    All-period obligations
    $674K
    0.72% of all-period positive obligations · 1 award
    Recorded activity
    Since Sep 29, 2025
    through Aug 7, 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.

  10. #10

    Last 12mo obligations

    $534K

    3.5%

    Dollar movement

    −$4.4M

    vs. prior 12 months

    Last 12mo awards

    5 awards

    7 actions

    Historical and award details for WESTON SOLUTIONS INC
    Obligations: prior → latest
    $4.9M → $534K
    −89.1%
    Share: prior → latest
    13.9% → 3.5%
    −10.3 percentage points
    All-period obligations
    $8.6M
    9.2% of all-period positive obligations · 29 awards
    Recorded activity
    Since Jan 28, 2022
    through Sep 8, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported510
    Reported small business00
    All-period set-aside types

    None reported.

  11. #11

    Last 12mo obligations

    $455K

    3.0%

    Dollar movement

    −$2.0M

    vs. prior 12 months

    Last 12mo awards

    4 awards

    5 actions

    Historical and award details for DEWBERRY ENGINEERS INC.
    Obligations: prior → latest
    $2.5M → $455K
    −81.6%
    Share: prior → latest
    7.0% → 3.0%
    −4.0 percentage points
    All-period obligations
    $3.4M
    3.6% of all-period positive obligations · 4 awards
    Recorded activity
    Since Aug 1, 2023
    through Sep 9, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported43
    Reported small business00
    All-period set-aside types

    None reported.

  12. #12

    Last 12mo obligations

    $257K

    1.7%

    Dollar movement

    +$257K

    vs. prior 12 months

    Last 12mo awards

    1 award

    2 actions

    Historical and award details for LANGAN ENGINEERING & ENVIRONMENTAL SERVICES, LLC
    Obligations: prior → latest
    $0 → $257K
    Not comparable
    Share: prior → latest
    0% → 1.7%
    +1.7 percentage points
    All-period obligations
    $257K
    0.27% of all-period positive obligations · 1 award
    Recorded activity
    Since Nov 19, 2025
    through Feb 23, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside10
    Not reported00
    Reported small business00
    All-period set-aside types

    None reported.

  13. #13

    Last 12mo obligations

    $187K

    1.2%

    Dollar movement

    +$187K

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for CULTURAL RESOURCE ANALYSTS, INC.
    Obligations: prior → latest
    $0 → $187K
    Not comparable
    Share: prior → latest
    0% → 1.2%
    +1.2 percentage points
    All-period obligations
    $187K
    0.20% of all-period positive obligations · 1 award
    Recorded activity
    Since Sep 19, 2025
    through Sep 19, 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 · Total small business
  14. #14

    Last 12mo obligations

    $185K

    1.2%

    Dollar movement

    +$185K

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for BRIDGENET INTERNATIONAL INC.
    Obligations: prior → latest
    $0 → $185K
    Not comparable
    Share: prior → latest
    0% → 1.2%
    +1.2 percentage points
    All-period obligations
    $185K
    0.20% of all-period positive obligations · 1 award
    Recorded activity
    Since Apr 13, 2026
    through Apr 13, 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.

  15. #15

    Last 12mo obligations

    $150K

    1.0%

    Dollar movement

    +$150K

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for COW CREEK BAND OF UMPQUA TRIBE OF INDIANS
    Obligations: prior → latest
    $0 → $150K
    Not comparable
    Share: prior → latest
    0% → 1.0%
    +1.0 percentage points
    All-period obligations
    $150K
    0.16% of all-period positive obligations · 1 award
    Recorded activity
    Since Jun 26, 2026
    through Jun 26, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside10
    Not reported00
    Reported small business00
    All-period set-aside types

    None reported.

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

+$1.9M

NICHOLS CONSULTING ENGINEERS CHTD

FHWA - TURNER-FAIRBANKS HIGHWAY

NON-PERSONAL SERVICES ORDER TO PROVIDE A LONG TERM PAVEMENT PERFORMANCE (LTPP) MATERIALS REFERENCE LIBRARY (MRL)

Why it stands out

The funding office climbed 9 positions in attributed spending.

It now ranks #4 in attributed spending.

Award net obligations
$1.9M
Share of 12-month positive obligations
12.3%
Supporting data
Prime contractor
#3 · 12.3% share
+12.3 percentage points · $2.0M net increase; action accounted for 90.9%
Funding office
#4 · 12.5% attributed share
up 9 ranks · +11.9 percentage points · $1.7M net increase; action exceeded it by $194K
Related:Funding office gain
PIID 693JJ325F00236N
Modification

This action

+$1.8M

PACIFIC WESTERN TECHNOLOGIES, LTD.

FHWA - EASTERN FEDERAL LANDS DIVISI

ROAD INVENTORY PROGRAM - (RIP) THE PURPOSE OF THIS MODIFICATION IS TO: 1. EXERCISE THE OPTION FOR CONTRACT LINE-ITEM NUMBER (CLIN) 40101 IN THE TOTAL OBLIGATED AMOUNT OF $884,321.00 FOR WORK ASSOCIATED TO OPTION YEAR 4. 2. EXERCISE THE OPTION FOR

Why it stands out

The contractor climbed 4 positions in this market.

It now ranks #4 by positive obligations over the latest 12 months.

Award net obligations
$5.2M
Share of 12-month positive obligations
11.8%
Supporting data
Prime contractor
#4 · 10.7% share
up 4 ranks · +8.6 percentage points · $882K net increase; action exceeded it by $886K
Funding office
#3 · 12.8% attributed share
up 5 ranks · +9.6 percentage points · $796K net increase; action exceeded it by $973K
Related:Largest share gain
PIID 693C7322F000038 · Mod P00010
Modification

This action

+$1.2M

WSP USA SOLUTIONS INC

FHWA OFFICE OF INFRASTRUCTURE

FUNDS FOR THE IMPLEMENTATION SUPPORT OF FOUR EDC-8 INNOVATIONS

Why it stands out

The contractor climbed 4 positions in this market.

It now ranks #1 by positive obligations over the latest 12 months.

Award net obligations
$2.2M
Share of 12-month positive obligations
8.0%
Supporting data
Prime contractor
#1 · 15.3% share
$81K net decline despite this positive action
Funding office
#2 · 14.9% attributed share
+14.9 percentage points · $2.2M net increase; action accounted for 54.1%
PIID 693JJ325F00267N · Mod P00001
Base award

This action

+$1.3M

TRC ENVIRONMENTAL CORPORATION

FAA

AREA Z PFAS REMEDIAL INVESTIGATION PHASE 1A

Why it stands out

A new award added obligations despite weaker contractor activity.

The action represented 8.7% of the market’s latest 12-month positive obligations while the contractor’s obligations fell $419 overall.

Award net obligations
$1.3M
Share of 12-month positive obligations
8.7%
Supporting data
Prime contractor
#2 · 14.7% share
$419 net decline despite this positive action
PIID 692M1526F00087
Modification

This action

+$570K

SUSTAINABLE DESIGN CONSORTIUM, (SDC) INC

693JF7 DOT MARITIME ADMINISTRATION

THIS MODIFICATION ADDS ADDITIONAL FUNDING TO CLIN(S) 1 IN THE AMOUNT OF $50,000.00 AND CLIN 2 IN THE AMOUNT OF $520,000.00. THE TOTAL AMOUNT OF THIS ACTION IS $570,000.00.

Why it stands out

The contractor climbed 3 positions in this market.

It now ranks #6 by positive obligations over the latest 12 months.

Award net obligations
$4.8M
Share of 12-month positive obligations
3.8%
Supporting data
Prime contractor
#6 · 6.8% share
up 3 ranks · +5.2 percentage points · $450K net increase; action exceeded it by $120K
PIID 693JF722F00082N · Mod P00006
Base award

This action

+$455K

STANTEC CONSULTING SERVICES INC.

6982AF CENTRAL FEDERAL LANDS DIVISI

2026 SEMIANNUAL SAMPLING EVENTS AND ENVIRONMENTAL CONSULTING SERVICES FOR THE MATERIALS LABORATORY SPILL CLEANUP PROJECT (MLSCP) AT THE DENVER FEDERAL CENTER

Why it stands out

The contractor climbed 5 positions in this market.

It now ranks #8 by positive obligations over the latest 12 months.

Award net obligations
$455K
Share of 12-month positive obligations
3.0%
Supporting data
Prime contractor
#8 · 4.9% share
up 5 ranks · +4.3 percentage points · $517K net increase; action accounted for 88.0%
Funding office
#7 · 6.7% attributed share
up 10 ranks · +6.5 percentage points · $946K net increase; action accounted for 48.0%
PIID 6982AF26F00081N
View recent award activity by date (10)
  1. WESTON SOLUTIONS INCDeobligation · PIID 6973GH26F00352
    Action−$742
    Award net obligations$25K
  2. TERRAPHASE ENGINEERING INCModification · PIID 6991PE21P000011
    Action+$9K
    Award net obligations$289K
  3. QUINN EVANS ARCHITECTS INCBase award · PIID 693C7326P000035
    Action+$145K
    Award net obligations$145K
  4. TRC ENVIRONMENTAL CORPORATIONBase award · PIID 692M1526F00286
    Action+$90K
    Award net obligations$90K
  5. THE PUBLIC ARCHAEOLOGY LABORATORY, INCORPORATEDDeobligation · PIID 693C7325F00107N
    Action−$32
    Award net obligations$47K
  6. WASHINGTON STATE UNIVERSITYBase award · PIID 6913G626P800043
    Action+$79K
    Award net obligations$79K
  7. WSP USA SOLUTIONS INCModification · PIID 693JJ325F00267N
    Action+$114K
    Award net obligations$2.2M
  8. GSI HAWAII INCModification · PIID 693JK325C000006
    Action+$15K
    Award net obligations$674K
  9. TRC ENVIRONMENTAL CORPORATIONBase award · PIID 692M1526F00087
    Action+$1.3M
    Award net obligations$1.3M
  10. R. CHRISTOPHER GOODWIN & ASSOCIATES, INC.Deobligation · PIID 693C7325F00095N
    Action−$20K
    Award net obligations$157K

DOT environmental consulting market FAQs

Answers based on reported federal contract data.

Who are the top DOT environmental consulting contractors?

In the 12 months through September 10, 2026, WSP USA SOLUTIONS INC, TRC ENVIRONMENTAL CORPORATION, and NICHOLS CONSULTING ENGINEERS CHTD were the leading DOT environmental consulting prime contractors by positive obligations.

  1. #1

    WSP USA SOLUTIONS INC

    $2,295,296 in positive obligations

  2. #2

    TRC ENVIRONMENTAL CORPORATION

    $2,204,202 in positive obligations

  3. #3

    NICHOLS CONSULTING ENGINEERS CHTD

    $1,857,959 in positive obligations

Rankings use reported USAspending award data.

Did DOT contract obligations decrease in the environmental consulting market?

Yes. Measured by net prime contract obligations, reported DOT activity in the environmental consulting market decreased 57.3% from $34,454,392 in the preceding 12 months to $14,716,489 in the 12 months through September 10, 2026.

Latest 12 months
$14,716,489
Net prime contract obligations
Preceding 12 months
$34,454,392
Net prime contract obligations
Change
−57.3%
Between matched 12-month periods

Reported contract actions, not outlays or a forecast.

What recent DOT contract award activity was reported in the environmental consulting market?

Recent DOT contract award activity reported in the environmental consulting market included actions for NICHOLS CONSULTING ENGINEERS CHTD, PACIFIC WESTERN TECHNOLOGIES, LTD., and WSP USA SOLUTIONS INC 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 DOT contracts under NAICS 541620?

From September 11, 2025 through September 10, 2026, DOT reported 45 positive-obligation awards for environmental consulting under NAICS 541620. The leading award type was delivery order. The leading reported procedure was subject to multiple award fair opportunity.

Positive-obligation awards
45
Leading reported procedure
Subject to Multiple Award Fair Opportunity
34.8% of positive obligations
Leading award type
Delivery Order
54.8% of positive obligations
Full and open
52.9%
of positive obligations
Reported parent IDV
78.9%
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