Federal Capture Intelligence

Top GSA environmental consulting services contractors (NAICS 541620)

Contract actions: October 1, 2021 – October 12, 2026 Updated October 13, 2026 General Services Administration agency guide NAICS 541620 · Environmental Consulting Services
Latest 12 months
$9.3M
Net obligations · Up $4.1M vs. $5.3M preceding
Prime contractors
18
With positive obligations in the latest 12 months

Research the GSA federal contracting market for environmental consulting services 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 Services at the General Services Administration

Federal records show $51.1M in net obligations across 428 awards in Environmental Consulting Services at the General Services Administration from Oct 1, 2021 through Oct 12, 2026. This market accounts for 0.14% of $36.3B in agency-wide net prime contract obligations over the period shown. Latest 12-month net obligations increased 77.9% from $5.3M to $9.3M. 5 prime contractors accounted for at least 80% of positive obligations in that latest period.

Fiscal-year activity

FY27 is year-to-date through Oct 12, 2026; earlier years show complete fiscal-year totals.

FY27 year-to-date: >−$1 versus −$1K through the same date in FY26 (Not comparable).
Net obligations · complete fiscal yearNet obligations · FY27 YTDContract actions
View fiscal-year data table
Fiscal yearNet obligationsContract actionsCoverage
FY2022$11.7M321Complete
FY2023$13.2M283Complete
FY2024$11.4M265Complete
FY2025$5.4M209Complete
FY2026$9.3M75Complete

Market at a glance

All reported prime contract awards
All-period net obligations
$51.1M
428 awards · 95 prime contractors
Latest 12-month movement
+77.9%
$9.3M vs. $5.3M
Leading eight prime share
93.3%
Share held by the eight leading prime contractors in the latest 12 months
View agency share, denominators, and set-aside reporting
Agency context
0.14% of $36.3B in agency-wide net obligations.
Set-aside share when reported
60.0% of 130 awards with reported set-aside status.
Set-aside reporting
78 set aside · 52 no set-aside · 298 not reported

What changed in the last 12 months?

Oct 13, 2025–Oct 12, 2026, compared with Oct 13, 2024–Oct 12, 2025.

Competitive shifts

MECA CONSULTING INC gained the most market share
0.5%→46.0%+45.5 percentage points
The contractor now ranks #1 by positive obligations, based on 3 reported actions.

Market structure

Top-five contractor share increased
63.53%→81.86%+18.3 percentage points
Contractors outside the top five now account for 18.1% of positive obligations.
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 Oct 12, 2026.

45.9% of positive obligations were attributed to PBS CENTRALIZED ACQUISITION SERVICES - CUSTOMER CONTRACTING BRANCH A. That represents $4.3M, up $4.3M from the preceding 12 months.

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

  1. PBS CENTRALIZED ACQUISITION SERVICES - CUSTOMER CONTRACTING BRANCH A45.9% · $4.3M · up $4.3M
  2. PBS PROJECT DELIVERY WEST - BRANCH E10.7% · $999K · up $999K
  3. PBS R7 PROG SUPPORT - REGIONAL SUPPORT8.5% · $792K · up $1.1M
  4. PBS R5 ACQUISITION MANAGEMENT DIVISION7.7% · $722K · up $752K
  5. PBS R8 ACQUISITION MANAGEMENT DIVISION6.3% · $593K · down $891K
  6. All other reported offices20.9% 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

    PBS CENTRALIZED ACQUISITION SERVICES - CUSTOMER CONTRACTING BRANCH A

    #1New to the positive-obligation ranking

    Latest 12 months

    $4.3M

    45.9% of positive obligations

    Versus preceding 12 months

    +$4.3M

    1 active prime contractor · 1 award

    View office comparison and evidence

    Reported obligations rose from $0 to $4.3M. The office’s share of positive obligations moved from 0% to 45.9%, a change of +45.9 percentage points.

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

    Leading award-level changes

  2. Reported funding office

    PBS PROJECT DELIVERY WEST - BRANCH E

    #2New to the positive-obligation ranking

    Latest 12 months

    $999K

    10.7% of positive obligations

    Versus preceding 12 months

    +$999K

    1 active prime contractor · 1 award

    View office comparison and evidence

    Reported obligations rose from $0 to $999K. The office’s share of positive obligations moved from 0% to 10.7%, a change of +10.7 percentage points.

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

  3. Reported funding office

    PBS R7 PROG SUPPORT - REGIONAL SUPPORT

    #3New to the positive-obligation ranking

    Latest 12 months

    $792K

    8.5% of positive obligations

    Versus preceding 12 months

    +$1.1M

    1 active prime contractor · 1 award

    View office comparison and evidence

    Reported obligations moved from $289K in net deobligations to $792K in net obligations. The office’s share of positive obligations moved from 0% to 8.5%, a change of +8.5 percentage points.

    The latest period contains 1 action across 1 award. The preceding period contained 1 active prime contractor and 10 awards.

  4. Reported funding office

    PBS R5 ACQUISITION MANAGEMENT DIVISION

    #4New to the positive-obligation ranking

    Latest 12 months

    $722K

    7.7% of positive obligations

    Versus preceding 12 months

    +$752K

    2 active prime contractors · 3 awards

    View office comparison and evidence

    Reported obligations moved from $29K in net deobligations to $722K in net obligations. The office’s share of positive obligations moved from 0% to 7.7%, a change of +7.7 percentage points.

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

  5. Reported funding office

    PBS R8 ACQUISITION MANAGEMENT DIVISION

    #5Down 4 from #1

    Latest 12 months

    $593K

    6.3% of positive obligations

    Versus preceding 12 months

    −$891K

    7 active prime contractors · 10 awards

    View office comparison and evidence

    Reported obligations decreased 60.1% from $1.5M to $593K. The office’s share of positive obligations moved from 25.5% to 6.3%, a change of −19.2 percentage points.

    The latest period contains 12 actions across 10 awards and 1 newly active prime contractor. The preceding period contained 8 active prime contractors and 17 awards.

    Leading award-level changes

  6. Reported funding office

    PBS R1 NATIONAL CONTRACTS TEAM

    #6Up 1 from #7

    Latest 12 months

    $383K

    4.1% of positive obligations

    Versus preceding 12 months

    +$74K

    2 active prime contractors · 2 awards

    View office comparison and evidence

    Reported obligations increased 23.9% from $309K to $383K. The office’s share of positive obligations moved from 5.3% to 4.1%, a change of −1.2 percentage points.

    The latest period contains 7 actions across 2 awards. The preceding period contained 5 active prime contractors and 10 awards.

  7. Reported funding office

    PBS PROJECT DELIVERY CENTRAL - BRANCH B

    #7New to the positive-obligation ranking

    Latest 12 months

    $311K

    3.3% of positive obligations

    Versus preceding 12 months

    +$311K

    1 active prime contractor · 3 awards

    View office comparison and evidence

    Reported obligations rose from $0 to $311K. The office’s share of positive obligations moved from 0% to 3.3%, a change of +3.3 percentage points.

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

  8. Reported funding office

    PBS R9 AMD CAPITAL PROJECTS

    #8Down 5 from #3

    Latest 12 months

    $260K

    2.8% of positive obligations

    Versus preceding 12 months

    −$614K

    1 active prime contractor · 1 award

    View office comparison and evidence

    Reported obligations decreased 70.3% from $873K to $260K. The office’s share of positive obligations moved from 15.0% to 2.8%, a change of −12.2 percentage points.

    The latest period contains 1 action across 1 award. The preceding period contained 2 active prime contractors and 3 awards.

  9. Reported funding office

    PBS R4 AMD CAPITAL/AE BRANCH

    #9Up 6 from #15

    Latest 12 months

    $239K

    2.6% of positive obligations

    Versus preceding 12 months

    +$234K

    1 active prime contractor · 1 award

    View office comparison and evidence

    Reported obligations increased 4967.7% from $5K to $239K. The office’s share of positive obligations moved from 0.080% to 2.6%, a change of +2.5 percentage points.

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

  10. Reported funding office

    PBS R11 BUILDING SERVICES DIVISION CENTER 3

    #10Down 2 from #8

    Latest 12 months

    $223K

    2.4% of positive obligations

    Versus preceding 12 months

    −$65K

    1 active prime contractor · 2 awards

    View office comparison and evidence

    Reported obligations decreased 22.6% from $288K to $223K. The office’s share of positive obligations moved from 5.0% to 2.4%, a change of −2.6 percentage points.

    The latest period contains 4 actions across 2 awards. The preceding period contained 1 active prime contractor and 2 awards.

  11. Reported funding office

    PBS R7 PROG SUPPORT - CAPITAL AND IDIQ

    #11Down 6 from #5

    Latest 12 months

    $179K

    1.9% of positive obligations

    Versus preceding 12 months

    −$372K

    1 active prime contractor · 1 award

    View office comparison and evidence

    Reported obligations decreased 67.6% from $551K to $179K. The office’s share of positive obligations moved from 9.5% to 1.9%, a change of −7.6 percentage points.

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

  12. Reported funding office

    PBS R11 SPECIAL PROGRAMS DIVISION ACQUISITION REGIONAL SUPPORT

    #14Down 12 from #2

    Latest 12 months

    $66K

    0.71% of positive obligations

    Versus preceding 12 months

    −$840K

    2 active prime contractors · 3 awards

    View office comparison and evidence

    Reported obligations decreased 92.7% from $906K to $66K. The office’s share of positive obligations moved from 15.6% to 0.71%, a change of −14.9 percentage points.

    The latest period contains 3 actions across 3 awards. The preceding period contained 5 active prime contractors and 16 awards.

  13. Reported funding office

    PBS R6 CONSTRUCTION ACQUISITION BRANCH

    No positive-obligation rank

    Latest 12 months

    $0

    0% of positive obligations

    Versus preceding 12 months

    −$645K

    2 active prime contractors · 3 awards

    View office comparison and evidence

    Reported obligations decreased 100.0% from $645K to $0. The office’s share of positive obligations moved from 11.1% to 0%, a change of −11.1 percentage points.

    The latest period contains 7 actions across 3 awards. The preceding period contained 3 active prime contractors and 10 awards.

Contract types, competition, and procurement methods

From Oct 13, 2025 through Oct 12, 2026, 27 awards had positive obligations totaling $9.4M. Mafo was the leading reported procedure, accounting for 59.0% of positive obligations. Awards with a reported parent IDV accounted for 98.8%.

Leading award type
69.2%
Delivery Order
Leading reported procedure
59.0%
Mafo
Reported parent IDV
98.8%
of positive obligations had a reported parent IDV
Median reported offers
1
19 of 27 awards reported offers

Buying method changes

Compared with Oct 13, 2024–Oct 12, 2025. Based on 27 current awards and 51 preceding awards with positive net obligations.

Median positive award obligations
$142K
Up from $49K in the preceding period
Reported full-and-open obligation share
36.3%
Down from 69.7% in the preceding period
Multiple-award parent obligation share
77.0%
Up from 59.9% 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 20.6 percentage points higher, reported full-and-open obligation share is 6.5 percentage points higher, delivery-order obligation share is 6.4 percentage points higher, and median positive award obligations are 2.4% higher.

MeasureThis marketPeer medianDifference
Parent-IDV obligation share98.8%78.2%+20.6 pts
Reported full-and-open obligation share36.3%29.8%+6.5 pts
Delivery-order obligation share69.2%62.8%+6.4 pts
Median positive award obligations$142K$138K+2.4%
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)14$6.5M69.2%
BPA Call(A)8$2.8M29.6%
Definitive Contract(D)3$79K0.84%
Purchase Order(B)2$35K0.37%

Reported parent-award types

Reported valueAwardsPositive obligationsShare
FSS(C)11$6.2M65.8%
BPA(E)8$2.8M29.6%
IDC(B)3$311K3.3%
Not reported5$114K1.2%

Single- or multiple-award parent structure

Reported valueAwardsPositive obligationsShare
Multiple Award(M)15$7.2M77.0%
Single Award(S)7$2.1M21.8%
Not reported5$114K1.2%

Solicitation procedures

Reported valueAwardsPositive obligationsShare
Mafo(SUBJECT TO MULTIPLE AWARD FAIR OPPORTUNITY)7$5.6M59.0%
Subject to Multiple Award Fair Opportunity(MAFO)11$3.4M36.3%
Negotiated Proposal/Quote(NP)3$311K3.3%
Sp1(SIMPLIFIED ACQUISITION)2$81K0.86%
Simplified Acquisition(SP1)2$31K0.33%
Sss(ONLY ONE SOURCE)2$22K0.23%

Extent competed

Reported valueAwardsPositive obligationsShare
A(FULL AND OPEN COMPETITION)7$5.6M59.0%
Full and Open Competition(A)11$3.4M36.3%
Full and Open Competition After Exclusion of Sources(D)3$311K3.3%
G(NOT COMPETED UNDER SAP)2$81K0.86%
Competed Under SAP(F)2$31K0.33%
C(NOT COMPETED)2$22K0.23%

Fair-opportunity and limited-source reporting

Reported valueAwardsPositive obligationsShare
Fair Opportunity Given(FAIR)13$7.7M81.8%
Competitive Set Aside(CSA)3$989K10.5%
Only One Source - Other(ONE)2$278K3.0%
Not reported9$445K4.7%

Other-than-full-and-open reasons

Reported valueAwardsPositive obligationsShare
SAP Non-Competition (FAR 13)(SP2)2$81K0.86%
Only One Source-Other (FAR 6.302-1 Other)(ONE)1$18K0.19%
Unique Source (FAR 6.302-1(B)(1))(UNQ)1$4K0.040%
Not reported23$9.3M98.9%

Contract pricing types

Reported valueAwardsPositive obligationsShare
J(FIRM FIXED PRICE)11$5.7M60.1%
Firm Fixed Price(J)16$3.8M39.9%

Product or Service Codes

Reported valueAwardsPositive obligationsShare
Support- Professional: Engineering/Technical(R425)1$4.3M45.6%
Other Environmental Services(F999)5$2.0M20.8%
Special Studies/Analysis- Environmental Assessments(B510)4$1.4M15.2%
Environmental Systems Protection- Environmental Remediation(F108)2$460K4.9%
Inspection- Miscellaneous(H399)4$375K4.0%
Environmental Systems Protection- Environmental Consulting and Legal Support(F115)1$260K2.8%
Other reported values10$645K6.9%

Awarding subagencies

Reported valueAwardsPositive obligationsShare
Public Buildings Service(4740)27$9.4M100.0%

Awarding offices

Reported valueAwardsPositive obligationsShare
Pbs Centralized Acquisition Services - Customer Contracting Branch A(47PH53)1$4.3M45.6%
Pbs Project Delivery West - Branch E(47PD55)1$999K10.6%
Pbs R7 Prog Support - Regional Support(47PH10)1$792K8.4%
Pbs Project Delivery West - Branch C(47PD53)1$706K7.5%
Pbs R8 Acquisition Management Division(47PJ00)3$649K6.9%
Pbs R1 National Contracts Team(47PB01)1$383K4.1%
Other reported values19$1.6M16.9%

Reported parent IDVs

Reported valueAwardsPositive obligationsShare
GS10F0229U(4730)1$4.3M45.6%
47PJ0020A0007(4740)1$999K10.6%
47PH0819A0001(4740)1$792K8.4%
47PG1025A0001(4740)2$729K7.8%
47QRAA18D0074(4732)2$499K5.3%
47QRAA22D0037(4732)2$460K4.9%
47QRAA18D002R(4732)1$383K4.1%
47PM1122D0001(4740)3$311K3.3%
Other reported values9$835K8.9%
Not reported5$114K1.2%

Offers, award size, and timing

Median reported offers
1 median
19 reported · 8 not reported
Positive award obligations
$142K median
$18K–$260K middle 50%
Reported performance period
652 days (~21 months) median
27 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 Oct 12, 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
5 of 18prime contractors account for at least 80% of positive obligations in the last 12 months
Largest prime contractor
46.0%of positive obligations in the last 12 months
Leading four prime contractors
76.5%of positive obligations in the last 12 months
Leading eight prime contractors
93.3%of positive obligations in the last 12 months

Based on $9.4M in positive obligations during the 12 months ending Oct 12, 2026. Individual shares and movement appear in the searchable rankings below. Movement compares with Oct 13, 2024–Oct 12, 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

    $4.3M

    46.0%

    Dollar movement

    +$4.3M

    vs. prior 12 months

    Last 12mo awards

    3 awards

    3 actions

    Historical and award details for MECA CONSULTING INC
    Obligations: prior → latest
    $30K → $4.3M
    +14407.1%
    Share: prior → latest
    0.51% → 46.0%
    +45.5 percentage points
    All-period obligations
    $5.0M
    9.7% of all-period positive obligations · 12 awards
    Recorded activity
    Since Nov 4, 2021
    through Sep 29, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside10
    Reported no set-aside01
    Not reported23
    Reported small business34
    All-period set-aside types
    • 1 · Total small business
  2. #2

    Last 12mo obligations

    $1.3M

    14.3%

    Dollar movement

    +$252K

    vs. prior 12 months

    Last 12mo awards

    5 awards

    10 actions

    Historical and award details for WSP USA SOLUTIONS INC
    Obligations: prior → latest
    $1.1M → $1.3M
    +23.1%
    Share: prior → latest
    18.8% → 14.3%
    −4.5 percentage points
    All-period obligations
    $5.7M
    11.0% of all-period positive obligations · 18 awards
    Recorded activity
    Since Feb 22, 2022
    through Oct 6, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported512
    Reported small business00
    All-period set-aside types

    None reported.

  3. #3

    Last 12mo obligations

    $792K

    8.4%

    Dollar movement

    +$1.1M

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for QUATERNARY RESOURCE INVESTIGATIONS, L.L.C.
    Obligations: prior → latest
    −$289K → $792K
    Not comparable
    Share: prior → latest
    0% → 8.4%
    +8.4 percentage points
    All-period obligations
    $5.7M
    11.0% of all-period positive obligations · 53 awards
    Recorded activity
    Since Oct 13, 2021
    through Jan 23, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported110
    Reported small business110
    All-period set-aside types

    None reported.

  4. #4

    Last 12mo obligations

    $729K

    7.8%

    Dollar movement

    +$514K

    vs. prior 12 months

    Last 12mo awards

    2 awards

    4 actions

    Historical and award details for OCCU-TEC INC
    Obligations: prior → latest
    $215K → $729K
    +238.6%
    Share: prior → latest
    3.7% → 7.8%
    +4.1 percentage points
    All-period obligations
    $944K
    1.8% of all-period positive obligations · 4 awards
    Recorded activity
    Since Dec 5, 2024
    through Jun 12, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported22
    Reported small business22
    All-period set-aside types

    None reported.

  5. #5

    Last 12mo obligations

    $499K

    5.3%

    Dollar movement

    −$492K

    vs. prior 12 months

    Last 12mo awards

    3 awards

    5 actions

    Historical and award details for POTOMAC-HUDSON ENGINEERING INC
    Obligations: prior → latest
    $991K → $499K
    −49.7%
    Share: prior → latest
    17.1% → 5.3%
    −11.8 percentage points
    All-period obligations
    $4.7M
    9.2% of all-period positive obligations · 13 awards
    Recorded activity
    Since Oct 26, 2021
    through Jul 16, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside12
    Reported no set-aside00
    Not reported23
    Reported small business35
    All-period set-aside types
    • 2 · Total small business
  6. #6

    Last 12mo obligations

    $460K

    4.9%

    Dollar movement

    +$43K

    vs. prior 12 months

    Last 12mo awards

    2 awards

    3 actions

    Historical and award details for S.S. PAPADOPULOS & ASSOCIATES, INC.
    Obligations: prior → latest
    $417K → $460K
    +10.4%
    Share: prior → latest
    7.2% → 4.9%
    −2.3 percentage points
    All-period obligations
    $5.1M
    9.9% of all-period positive obligations · 5 awards
    Recorded activity
    Since Oct 27, 2021
    through Sep 10, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported22
    Reported small business22
    All-period set-aside types

    None reported.

  7. #7

    Last 12mo obligations

    $386K

    4.1%

    Dollar movement

    −$251K

    vs. prior 12 months

    Last 12mo awards

    6 awards

    6 actions

    Historical and award details for MABBETT & ASSOCIATES, INC.
    Obligations: prior → latest
    $637K → $386K
    −39.4%
    Share: prior → latest
    11.0% → 4.1%
    −6.9 percentage points
    All-period obligations
    $4.5M
    8.8% of all-period positive obligations · 37 awards
    Recorded activity
    Since Oct 26, 2021
    through Sep 18, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside11
    Reported no set-aside12
    Not reported410
    Reported small business613
    All-period set-aside types
    • 1 · SDVOSB set-aside
  8. #8

    Last 12mo obligations

    $223K

    2.4%

    Dollar movement

    −$65K

    vs. prior 12 months

    Last 12mo awards

    2 awards

    4 actions

    Historical and award details for EASTERN RESEARCH GROUP INC
    Obligations: prior → latest
    $288K → $223K
    −22.6%
    Share: prior → latest
    5.0% → 2.4%
    −2.6 percentage points
    All-period obligations
    $1.4M
    2.6% of all-period positive obligations · 5 awards
    Recorded activity
    Since Nov 8, 2021
    through Sep 29, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported22
    Reported small business00
    All-period set-aside types

    None reported.

  9. #9

    Last 12mo obligations

    $190K

    2.0%

    Dollar movement

    +$6K

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for TRINITY CONSULTANTS INC
    Obligations: prior → latest
    $183K → $190K
    +3.4%
    Share: prior → latest
    3.2% → 2.0%
    −1.1 percentage points
    All-period obligations
    $613K
    1.2% of all-period positive obligations · 3 awards
    Recorded activity
    Since Jan 21, 2022
    through Sep 29, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported11
    Reported small business00
    All-period set-aside types

    None reported.

  10. #10

    Last 12mo obligations

    $179K

    1.9%

    Dollar movement

    −$372K

    vs. prior 12 months

    Last 12mo awards

    1 award

    3 actions

    Historical and award details for STANTEC CONSULTING SERVICES INC.
    Obligations: prior → latest
    $551K → $179K
    −67.6%
    Share: prior → latest
    9.5% → 1.9%
    −7.6 percentage points
    All-period obligations
    $503K
    0.98% of all-period positive obligations · 3 awards
    Recorded activity
    Since Nov 8, 2021
    through Jul 24, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported11
    Reported small business00
    All-period set-aside types

    None reported.

  11. #11

    Last 12mo obligations

    $108K

    1.1%

    Dollar movement

    +$67K

    vs. prior 12 months

    Last 12mo awards

    1 award

    3 actions

    Historical and award details for STANTEC CONSULTING SERVICES INC
    Obligations: prior → latest
    $41K → $108K
    +165.3%
    Share: prior → latest
    0.70% → 1.1%
    +0.5 percentage points
    All-period obligations
    $149K
    0.29% of all-period positive obligations · 1 award
    Recorded activity
    Since Nov 2, 2021
    through May 28, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported11
    Reported small business00
    All-period set-aside types

    None reported.

  12. #12

    Last 12mo obligations

    $88K

    0.94%

    Dollar movement

    +$88K

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for TERRACON CONSULTANTS, INC.
    Obligations: prior → latest
    $0 → $88K
    Not comparable
    Share: prior → latest
    0% → 0.94%
    +0.9 percentage points
    All-period obligations
    $96K
    0.19% of all-period positive obligations · 3 awards
    Recorded activity
    Since Oct 20, 2021
    through Jul 31, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported10
    Reported small business00
    All-period set-aside types

    None reported.

  13. #13

    Last 12mo obligations

    $18K

    0.19%

    Dollar movement

    +$18K

    vs. prior 12 months

    Last 12mo awards

    1 award

    4 actions

    Historical and award details for S & B ENVIRONMENTAL LLC
    Obligations: prior → latest
    $0 → $18K
    Not comparable
    Share: prior → latest
    0% → 0.19%
    +0.2 percentage points
    All-period obligations
    $18K
    0.030% of all-period positive obligations · 1 award
    Recorded activity
    Since Apr 16, 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.

  14. #14

    Last 12mo obligations

    $17K

    0.19%

    Dollar movement

    −$84K

    vs. prior 12 months

    Last 12mo awards

    1 award

    3 actions

    Historical and award details for ISLAND PUMP AND TANK, LLC
    Obligations: prior → latest
    $101K → $17K
    −82.8%
    Share: prior → latest
    1.7% → 0.19%
    −1.6 percentage points
    All-period obligations
    $156K
    0.30% of all-period positive obligations · 2 awards
    Recorded activity
    Since Dec 20, 2023
    through Sep 29, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside11
    Not reported00
    Reported small business00
    All-period set-aside types

    None reported.

  15. #15

    Last 12mo obligations

    $16K

    0.17%

    Dollar movement

    +$16K

    vs. prior 12 months

    Last 12mo awards

    2 awards

    2 actions

    Historical and award details for ENVIRONMENTAL CONSULTING GROUP, INC.
    Obligations: prior → latest
    $0 → $16K
    Not comparable
    Share: prior → latest
    0% → 0.17%
    +0.2 percentage points
    All-period obligations
    $369K
    0.72% of all-period positive obligations · 8 awards
    Recorded activity
    Since Oct 13, 2021
    through Jun 22, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported21
    Reported small business21
    All-period set-aside types
    • 1 · 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

+$4.3M

MECA CONSULTING INC

PBS CENTRALIZED ACQUISITION SERVICES - CUSTOMER CONTRACTING BRANCH A

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS (ASHRAE) 188 WATER MANAGEMENT PLAN DEVELOPMENT.

Why it stands out

One action equaled more than a third of the market’s latest 12-month positive obligations.

The $4.3M action represented 45.8% of the market’s positive obligations over the latest 12 months.

Award net obligations
$4.3M
Share of 12-month positive obligations
45.8%
Supporting data
Prime contractor
#1 · 46.0% share
up 19 ranks · +45.5 percentage points · $4.3M net increase; action exceeded it by $9K
Funding office
#1 · 45.9% attributed share
+45.9 percentage points · $4.3M net increase; action accounted for 100.0%
Related:Largest share gain
PIID 47PH5326F0067
Base award

This action

+$999K

WSP USA SOLUTIONS INC

PBS PROJECT DELIVERY WEST - BRANCH E

ND0501AK AND 70 OTHER LOCATIONS IN FORMER R8, R9, R10 INCLUDING ENVIRONMENTAL, FIRE, AND OTHER HYGIENE SURVEYS FOR ALL FEDERAL FACILITIES

Why it stands out

One action represented 10.7% of the market’s latest 12-month positive obligations.

At $999K, the action was large enough to materially affect the latest 12-month market picture.

Award net obligations
$999K
Share of 12-month positive obligations
10.7%
Supporting data
Prime contractor
#2 · 14.3% share
down 1 rank · −4.5 percentage points · $252K net increase; action exceeded it by $747K
Funding office
#2 · 10.7% attributed share
+10.7 percentage points · $999K net increase; action accounted for 100.0%
PIID 47PD5526F0088
Base award

This action

+$706K

OCCU-TEC INC

PBS R5 ACQUISITION MANAGEMENT DIVISION

THE BANNISTER COMPLEX FY26 YEAR 1 PERMIT REQUIREMENTS WILL BE PERFORMED AT THE BANNISTER FEDERAL COMPLEX IN 2306-2312 BANNISTER ROAD KANSAS CITY, MISSOURI.

Why it stands out

The contractor climbed 5 positions in this market.

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

Award net obligations
$706K
Share of 12-month positive obligations
7.5%
Supporting data
Prime contractor
#4 · 7.8% share
up 5 ranks · +4.1 percentage points · $514K net increase; action exceeded it by $193K
Funding office
#4 · 7.7% attributed share
+7.7 percentage points · $752K net increase; action accounted for 94.0%
PIID 47PD5326F0078
Modification

This action

+$792K

QUATERNARY RESOURCE INVESTIGATIONS, L.L.C.

PBS R7 PROG SUPPORT - REGIONAL SUPPORT

THE PURPOSE OF THIS MOD IS TO ADD IN-SCOPE TASKS NECESSARY DUE TO INITIAL FINDINGS. THE PRICE WILL GO FROM: $250,240.00 TO: $1,042,166.00. THE MOD INCLUDES A TIME EXTENSION OF 284 DAYS. THE END DATE WILL GO FROM: 4/18/25 TO: 1/27/26

Why it stands out

The award grew alongside stronger contractor activity.

The modification added $792K while contractor obligations rose $1.1M overall.

Award net obligations
$1.0M
Share of 12-month positive obligations
8.4%
Supporting data
Prime contractor
#3 · 8.4% share
+8.4 percentage points · $1.1M net increase; action accounted for 73.3%
Funding office
#3 · 8.5% attributed share
+8.5 percentage points · $1.1M net increase; action accounted for 73.3%
PIID 47PH1023F0043 · Mod PS0005
Modification

This action

+$260K

POTOMAC-HUDSON ENGINEERING INC

PBS R9 AMD CAPITAL PROJECTS

RIGHT OF ENTRY TO EIS

Why it stands out

This award grew while spending attributed to its office declined.

The modification added $260K while office-attributed obligations fell $614K overall.

Award net obligations
$1.1M
Share of 12-month positive obligations
2.8%
Supporting data
Prime contractor
#5 · 5.3% share
$492K net decline despite this positive action
Funding office
#8 · 2.8% attributed share
$614K net decline despite this positive action
PIID 47PK0125F0025 · Mod PS0001
Modification

This action

+$221K

EASTERN RESEARCH GROUP INC

PBS R11 BUILDING SERVICES DIVISION CENTER 3

MODIFICATION PO0003 EXERCISES OPTION YEAR 3 FOR THE PERIOD OF 10/1/2026 - 9/30/2027 FOR STORMWATER REGULATORY COMPLIANCE SUPPORT SERVICES AT 30 LOCATIONS IN WASHINGTON, D.C. UNDER BPA 47PM0323A0001 BPA CALL 47PM0323F0056

Why it stands out

This award grew while spending attributed to its office declined.

The modification added $221K while office-attributed obligations fell $65K overall.

Award net obligations
$941K
Share of 12-month positive obligations
2.4%
Supporting data
Prime contractor
#8 · 2.4% share
$65K net decline despite this positive action
Funding office
#10 · 2.4% attributed share
$65K net decline despite this positive action
PIID 47PM0323F0056 · Mod PO0003
View recent award activity by date (10)
  1. WSP USA SOLUTIONS INCDeobligation · PIID 47PJ0025F0197
    Action>−$1
    Award net obligations$355K
  2. MECA CONSULTING INCBase award · PIID 47PH5326F0067
    Action+$4.3M
    Award net obligations$4.3M
  3. TRINITY CONSULTANTS INCModification · PIID 47PJ0024F0209
    Action+$190K
    Award net obligations$570K
  4. EASTERN RESEARCH GROUP INCModification · PIID 47PM0323F0056
    Action+$2K
    Award net obligations$941K
  5. WSP USA SOLUTIONS INCModification · PIID 47PB0123F0030
    Action+$219K
    Award net obligations$1.7M
  6. TETRA TECH, INC.Base award · PIID 47PH5426F0279
    Action+$9K
    Award net obligations$9K
  7. WSP USA SOLUTIONS INCDeobligation · PIID 47PJ0025F0197
    Action−$42K
    Award net obligations$355K
  8. MABBETT & ASSOCIATES, INC.Modification · PIID 47PM1123C0010
    Action+$64K
    Award net obligations$302K
  9. S.S. PAPADOPULOS & ASSOCIATES, INC.Modification · PIID 47PJ0022F0508
    Action+$143K
    Award net obligations$2.1M
  10. S.S. PAPADOPULOS & ASSOCIATES, INC.Modification · PIID 47PJ0022F0508
    Action+$176K
    Award net obligations$2.1M

GSA environmental consulting services market FAQs

Answers based on reported federal contract data.

Who are the top GSA environmental consulting services contractors?

In the 12 months through October 12, 2026, MECA CONSULTING INC, WSP USA SOLUTIONS INC, and QUATERNARY RESOURCE INVESTIGATIONS, L.L.C. were the leading GSA environmental consulting services prime contractors by positive obligations.

  1. #1

    MECA CONSULTING INC

    $4,308,177 in positive obligations

  2. #2

    WSP USA SOLUTIONS INC

    $1,339,934 in positive obligations

  3. #3

    QUATERNARY RESOURCE INVESTIGATIONS, L.L.C.

    $791,926 in positive obligations

Rankings use reported USAspending award data.

Did GSA contract obligations increase in the environmental consulting services market?

Yes. Measured by net prime contract obligations, reported GSA activity in the environmental consulting services market increased 77.9% from $5,254,743 in the preceding 12 months to $9,347,549 in the 12 months through October 12, 2026.

Latest 12 months
$9,347,549
Net prime contract obligations
Preceding 12 months
$5,254,743
Net prime contract obligations
Change
+77.9%
Between matched 12-month periods

Reported contract actions, not outlays or a forecast.

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

Recent GSA contract award activity reported in the environmental consulting services market included actions for MECA CONSULTING INC, WSP USA SOLUTIONS INC, and OCCU-TEC INC during the 12 months through October 12, 2026.

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

Which procurement methods were reported for GSA contracts under NAICS 541620?

From October 13, 2025 through October 12, 2026, GSA reported 27 positive-obligation awards for environmental consulting services under NAICS 541620. The leading award type was delivery order. The leading reported procedure was mafo.

Positive-obligation awards
27
Leading reported procedure
Mafo
59% of positive obligations
Leading award type
Delivery Order
69.2% of positive obligations
Full and open
36.3%
of positive obligations
Reported parent IDV
98.8%
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 October 12, 2026. Set-aside and business-size fields reflect award records, not a contractor's current eligibility.

Review data methodology