Federal Capture Intelligence

Top DOT environmental consulting contractors (NAICS 541620)

Contract actions: October 1, 2021 – October 12, 2026 Updated October 13, 2026 Department of Transportation agency guide NAICS 541620 · Environmental Consulting Services
Latest 12 months
$14.2M
Net obligations · Down $20.9M vs. $35.1M preceding
Prime contractors
28
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 $98.2M in net obligations across 366 awards in environmental consulting at the Department of Transportation from Oct 1, 2021 through Oct 12, 2026. This market accounts for 0.22% of $44.5B in agency-wide net prime contract obligations over the period shown. Latest 12-month net obligations decreased 59.5% from $35.1M to $14.2M. 6 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: $0 versus $0 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$11.9M158Complete
FY2023$13.4M172Complete
FY2024$23.5M176Complete
FY2025$35.1M190Complete
FY2026$14.2M148Complete

Market at a glance

All reported prime contract awards
All-period net obligations
$98.2M
366 awards · 118 prime contractors
Latest 12-month movement
−59.5%
$14.2M vs. $35.1M
Leading eight prime share
87.2%
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 $44.5B 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 · 255 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

TRC ENVIRONMENTAL CORPORATION gained the most market share
6.15%→31.94%+25.8 percentage points
The contractor now ranks #1 by positive obligations, based on 29 reported actions.
WESTON SOLUTIONS INC lost the most market share
13.7%→3.6%−10.1 percentage points
The contractor now ranks #6 by positive obligations, based on 6 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.

Buyer demand

Reported obligations through FAA increased
$1.9M→$5.1M+$3.2M
Latest-period activity spans 36 awards across 8 prime contractors.
Reported obligations through 6973GH FRANCHISE ACQUISITION SVCS decreased
$2.8M→$534K−$2.3M
Latest-period activity spans 5 awards across 1 prime contractor.
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.

35.1% of positive obligations were attributed to FAA. That represents $5.1M, up $3.2M from the preceding 12 months.

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

  1. FAA35.1% · $5.1M · up $3.2M
  2. FHWA - EASTERN FEDERAL LANDS DIVISI11.9% · $1.7M · up $433K
  3. FHWA OFFICE OF INFRASTRUCTURE9.1% · $1.3M · up $410K
  4. FHWA OFFICE OF OPERATIONS7.9% · $1.1M · up $384K
  5. 693JF7 DOT MARITIME ADMINISTRATION7.3% · $1.1M · up $521K
  6. All other reported offices28.7% 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

    $5.1M

    35.1% of positive obligations

    Versus preceding 12 months

    +$3.2M

    8 active prime contractors · 36 awards

    View office comparison and evidence

    Reported obligations increased 172.5% from $1.9M to $5.1M. The office’s share of positive obligations moved from 5.3% to 35.1%, a change of +29.8 percentage points.

    The latest period contains 47 actions across 36 awards and 1 newly active prime contractor. The preceding period contained 9 active prime contractors and 27 awards.

    Leading award-level changes

  2. Reported funding office

    FHWA - EASTERN FEDERAL LANDS DIVISI

    #2Up 5 from #7

    Latest 12 months

    $1.7M

    11.9% of positive obligations

    Versus preceding 12 months

    +$433K

    8 active prime contractors · 9 awards

    View office comparison and evidence

    Reported obligations increased 33.8% from $1.3M to $1.7M. The office’s share of positive obligations moved from 3.6% to 11.9%, a change of +8.3 percentage points.

    The latest period contains 16 actions across 9 awards and 2 newly active prime contractors. The preceding period contained 11 active prime contractors and 13 awards.

  3. Reported funding office

    FHWA OFFICE OF INFRASTRUCTURE

    #3Up 6 from #9

    Latest 12 months

    $1.3M

    9.1% of positive obligations

    Versus preceding 12 months

    +$410K

    1 active prime contractor · 1 award

    View office comparison and evidence

    Reported obligations increased 45.3% from $904K to $1.3M. The office’s share of positive obligations moved from 2.5% to 9.1%, a change of +6.5 percentage points.

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

  4. Reported funding office

    FHWA OFFICE OF OPERATIONS

    #4Up 6 from #10

    Latest 12 months

    $1.1M

    7.9% of positive obligations

    Versus preceding 12 months

    +$384K

    2 active prime contractors · 9 awards

    View office comparison and evidence

    Reported obligations increased 50.8% from $756K to $1.1M. The office’s share of positive obligations moved from 2.1% to 7.9%, a change of +5.8 percentage points.

    The latest period contains 10 actions across 9 awards. The preceding period contained 2 active prime contractors and 10 awards.

  5. Reported funding office

    693JF7 DOT MARITIME ADMINISTRATION

    #5Up 8 from #13

    Latest 12 months

    $1.1M

    7.3% 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 1.5% to 7.3%, a change of +5.8 percentage points.

    The latest period contains 5 actions across 2 awards. The preceding period contained 3 active prime contractors and 3 awards.

  6. Reported funding office

    693KA9 CONTRACTING FOR SERVICES

    #6Rank unchanged

    Latest 12 months

    $1.0M

    7.0% of positive obligations

    Versus preceding 12 months

    −$440K

    1 active prime contractor · 1 award

    View office comparison and evidence

    Reported obligations decreased 30.3% from $1.4M to $1.0M. The office’s share of positive obligations moved from 4.1% to 7.0%, a change of +2.9 percentage points.

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

  7. Reported funding office

    6982AF CENTRAL FEDERAL LANDS DIVISI

    #7Up 8 from #15

    Latest 12 months

    $774K

    5.4% of positive obligations

    Versus preceding 12 months

    +$513K

    2 active prime contractors · 8 awards

    View office comparison and evidence

    Reported obligations increased 196.7% from $261K to $774K. The office’s share of positive obligations moved from 0.74% to 5.4%, a change of +4.6 percentage points.

    The latest period contains 10 actions across 8 awards and 1 newly active prime contractor. The preceding period contained 2 active prime contractors and 6 awards.

  8. Reported funding office

    FHWA OF OF POLICY GOVERNMENTAL AF

    #8Up 3 from #11

    Latest 12 months

    $606K

    4.2% of positive obligations

    Versus preceding 12 months

    −$45K

    1 active prime contractor · 2 awards

    View office comparison and evidence

    Reported obligations decreased 6.8% from $651K to $606K. The office’s share of positive obligations moved from 1.8% to 4.2%, a change of +2.4 percentage points.

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

  9. Reported funding office

    6973GH FRANCHISE ACQUISITION SVCS

    #9Down 7 from #2

    Latest 12 months

    $534K

    3.7% 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 8.0% to 3.7%, a change of −4.3 percentage points.

    The latest period contains 6 actions across 5 awards. The preceding period contained 1 active prime contractor and 7 awards.

  10. Reported funding office

    VOLPE NATL TRANSPORTATION SYS CNTR

    #10Up 6 from #16

    Latest 12 months

    $414K

    2.9% of positive obligations

    Versus preceding 12 months

    +$187K

    11 active prime contractors · 13 awards

    View office comparison and evidence

    Reported obligations increased 82.3% from $227K to $414K. The office’s share of positive obligations moved from 0.64% to 2.9%, a change of +2.2 percentage points.

    The latest period contains 16 actions across 13 awards and 5 newly active prime contractors. The preceding period contained 9 active prime contractors and 10 awards.

  11. Reported funding office

    FHWA - TURNER-FAIRBANKS HIGHWAY

    No positive-obligation rank

    Latest 12 months

    $0

    0% of positive obligations

    Versus preceding 12 months

    −$2.1M

    2 active prime contractors · 2 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 5.8% to 0%, a change of −5.8 percentage points.

    The latest period contains 2 actions across 2 awards. The preceding period contained 2 active prime contractors and 2 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 5.9% to 0%, a change of −5.9 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

    693195 OFFICE OF ACQUISITION MGT

    No positive-obligation rank

    Latest 12 months

    −$84K

    0% of positive obligations

    Versus preceding 12 months

    −$1.1M

    1 active prime contractor · 4 awards

    View office comparison and evidence

    Reported obligations moved from $1.0M in net obligations to $84K in net deobligations. The office’s share of positive obligations moved from 2.9% to 0%, a change of −2.9 percentage points.

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

  14. Reported funding office

    FHWA OFC OF PLANNING, ENVIRONMENT

    No positive-obligation rank

    Latest 12 months

    −$122K

    0% of positive obligations

    Versus preceding 12 months

    −$18.5M

    1 active prime contractor · 3 awards

    View office comparison and evidence

    Reported obligations moved from $18.4M in net obligations to $122K in net deobligations. The office’s share of positive obligations moved from 51.8% to 0%, a change of −51.8 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 Oct 13, 2025 through Oct 12, 2026, 45 awards had positive obligations totaling $14.7M. Np was the leading reported procedure, accounting for 30.7% of positive obligations. Awards with a reported parent IDV accounted for 78.9%.

Leading award type
58.0%
Delivery Order
Leading reported procedure
30.7%
Np
Reported parent IDV
78.9%
of positive obligations had a reported parent IDV
Median reported offers
1
26 of 45 awards reported offers

Buying method changes

Compared with Oct 13, 2024–Oct 12, 2025. Based on 45 current awards and 70 preceding awards with positive net obligations.

Reported full-and-open obligation share
20.3%
Down from 88.8% in the preceding period
Parent-IDV obligation share
78.9%
Up from 41.9% 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 5.7 percentage points lower, reported full-and-open obligation share is 10.6 percentage points lower, delivery-order obligation share is 10.4 percentage points lower, and median positive award obligations are 24.5% lower.

MeasureThis marketPeer medianDifference
Parent-IDV obligation share78.9%84.5%-5.7 pts
Reported full-and-open obligation share20.3%30.8%-10.6 pts
Delivery-order obligation share58.0%68.4%-10.4 pts
Median positive award obligations$114K$151K-24.5%
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)21$8.5M58.0%
BPA Call(A)6$3.1M20.9%
Definitive Contract(D)4$1.8M12.3%
Purchase Order(B)14$1.3M8.8%

Reported parent-award types

Reported valueAwardsPositive obligationsShare
IDC(B)17$6.4M43.3%
BPA(E)6$3.1M20.9%
FSS(C)4$2.2M14.6%
Not reported18$3.1M21.1%

Single- or multiple-award parent structure

Reported valueAwardsPositive obligationsShare
Single Award(S)20$7.1M48.4%
Multiple Award(M)7$4.5M30.5%
Not reported18$3.1M21.1%

Solicitation procedures

Reported valueAwardsPositive obligationsShare
Np(NEGOTIATED PROPOSAL/QUOTE)9$4.5M30.7%
Subject to Multiple Award Fair Opportunity(MAFO)5$2.6M17.8%
Mafo(SUBJECT TO MULTIPLE AWARD FAIR OPPORTUNITY)4$2.6M17.7%
Only One Source(SSS)3$1.4M9.3%
Sss(ONLY ONE SOURCE)1$1.4M9.2%
Sp1(SIMPLIFIED ACQUISITION)6$793K5.4%
Other reported values17$1.5M10.0%

Extent competed

Reported valueAwardsPositive obligationsShare
A(FULL AND OPEN COMPETITION)15$7.6M51.4%
Full and Open Competition(A)11$3.0M20.3%
C(NOT COMPETED)1$1.4M9.2%
Not Available for Competition(B)1$1.0M6.9%
G(NOT COMPETED UNDER SAP)4$631K4.3%
Not Competed Under SAP(G)5$425K2.9%
Other reported values8$741K5.0%

Fair-opportunity and limited-source reporting

Reported valueAwardsPositive obligationsShare
Fair Opportunity Given(FAIR)6$4.7M31.8%
Only One Source - Other(ONE)3$549K3.7%
Not reported36$9.5M64.5%

Other-than-full-and-open reasons

Reported valueAwardsPositive obligationsShare
Authorized by Statute (FAR 6.302-5(A)(2)(I))(OTH)4$1.5M10.0%
Only One Source-Other (FAR 6.302-1 Other)(ONE)2$1.5M9.8%
SAP Non-Competition (FAR 13)(SP2)6$604K4.1%
Mobilization, Essential R&d (FAR 6.302-3)(MES)1$257K1.7%
Not reported32$11.0M74.3%

Contract pricing types

Reported valueAwardsPositive obligationsShare
J(FIRM FIXED PRICE)20$7.8M52.6%
Firm Fixed Price(J)21$4.6M31.1%
Y(TIME AND MATERIALS)2$2.0M13.4%
Time and Materials(Y)1$408K2.8%
Labor Hours(Z)1$15K0.10%

Product or Service Codes

Reported valueAwardsPositive obligationsShare
Support- Professional: Engineering/Technical(R425)13$6.1M41.1%
Support- Professional: Other(R499)2$2.0M13.5%
Support- Professional: Policy Review/Development(R406)2$2.0M13.4%
Inspection- Ship and Marine Equipment(H320)1$1.0M6.9%
Transportation R&d Services; Surface Transportation, Public Transit, and Rail; Basic Research(AS11)2$738K5.0%
Other Environmental Services(F999)3$584K4.0%
Other reported values22$2.4M16.2%

Awarding subagencies

Reported valueAwardsPositive obligationsShare
Federal Aviation Administration(6920)21$7.0M47.6%
Federal Highway Administration(6925)12$5.8M39.2%
Maritime Administration(6938)3$1.1M7.3%
Immediate Office of the Secretary of Transportation(6901)8$493K3.3%
Pipeline and Hazardous Materials Safety Administration(6957)1$374K2.5%

Awarding offices

Reported valueAwardsPositive obligationsShare
692m15 Acquisition & Grants, Aaq600(692M15)13$4.9M33.4%
693jj3 Acquisition and Grants Mgt(693JJ3)5$3.1M20.8%
693c73 Eastern Fed Lands Division(693C73)3$1.8M12.1%
693ka9 Contracting for Services(693KA9)1$1.4M9.2%
693jf7 Dot Maritime Administration(693JF7)2$1.1M7.2%
6982af Central Federal Lands Divisi(6982AF)3$783K5.3%
Other reported values18$1.8M12.0%

Reported parent IDVs

Reported valueAwardsPositive obligationsShare
DTFACT17D00008(6920)12$4.7M32.2%
47QRAA21D005V(4732)1$1.6M10.9%
693JJ324A000007(6925)1$1.3M8.9%
693JF722D000004(6938)1$1.0M6.9%
693JJ322A000006(6925)2$738K5.0%
693JJ322A000017(6925)1$611K4.1%
6973GH21D00033(6920)3$535K3.6%
47QRAA19D000Q(4732)2$526K3.6%
Other reported values4$537K3.6%
Not reported18$3.1M21.1%

Offers, award size, and timing

Median reported offers
1 median
26 reported · 19 not reported
Positive award obligations
$114K median
$58K–$374K middle 50%
Reported performance period
366 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 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
6 of 28prime contractors account for at least 80% of positive obligations in the last 12 months
Largest prime contractor
31.9%of positive obligations in the last 12 months
Leading four prime contractors
70.3%of positive obligations in the last 12 months
Leading eight prime contractors
87.2%of positive obligations in the last 12 months

Based on $14.7M 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

    $4.7M

    31.9%

    Dollar movement

    +$2.5M

    vs. prior 12 months

    Last 12mo awards

    28 awards

    29 actions

    Historical and award details for TRC ENVIRONMENTAL CORPORATION
    Obligations: prior → latest
    $2.2M → $4.7M
    +112.6%
    Share: prior → latest
    6.2% → 31.9%
    +25.8 percentage points
    All-period obligations
    $13.9M
    14.1% of all-period positive obligations · 90 awards
    Recorded activity
    Since Dec 22, 2021
    through Sep 21, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported2822
    Reported small business00
    All-period set-aside types

    None reported.

  2. #2

    Last 12mo obligations

    $2.7M

    18.1%

    Dollar movement

    +$790K

    vs. prior 12 months

    Last 12mo awards

    11 awards

    12 actions

    Historical and award details for WSP USA SOLUTIONS INC
    Obligations: prior → latest
    $1.9M → $2.7M
    +42.4%
    Share: prior → latest
    5.2% → 18.1%
    +12.9 percentage points
    All-period obligations
    $19.5M
    19.8% of all-period positive obligations · 20 awards
    Recorded activity
    Since Aug 16, 2022
    through Sep 24, 2026

    Award reporting

    Latest and prior 12-month award reporting
    Reported award evidenceLatestPrior
    Reported set-aside00
    Reported no set-aside00
    Not reported1114
    Reported small business00
    All-period set-aside types

    None reported.

  3. #3

    Last 12mo obligations

    $1.6M

    11.0%

    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
    2.0% → 11.0%
    +8.9 percentage points
    All-period obligations
    $4.4M
    4.5% 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.

  4. #4

    Last 12mo obligations

    $1.4M

    9.3%

    Dollar movement

    +$81K

    vs. prior 12 months

    Last 12mo awards

    1 award

    6 actions

    Historical and award details for ICF INCORPORATED, L.L.C.
    Obligations: prior → latest
    $1.3M → $1.4M
    +6.3%
    Share: prior → latest
    3.6% → 9.3%
    +5.7 percentage points
    All-period obligations
    $5.7M
    5.7% of all-period positive obligations · 13 awards
    Recorded activity
    Since Jan 24, 2022
    through Sep 14, 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.

  5. #5

    Last 12mo obligations

    $1.0M

    7.0%

    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% → 7.0%
    +5.4 percentage points
    All-period obligations
    $4.8M
    4.9% 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.

  6. #6

    Last 12mo obligations

    $534K

    3.6%

    Dollar movement

    −$4.4M

    vs. prior 12 months

    Last 12mo awards

    5 awards

    6 actions

    Historical and award details for WESTON SOLUTIONS INC
    Obligations: prior → latest
    $4.9M → $534K
    −89.1%
    Share: prior → latest
    13.7% → 3.6%
    −10.1 percentage points
    All-period obligations
    $8.6M
    8.8% 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.

  7. #7

    Last 12mo obligations

    $517K

    3.5%

    Dollar movement

    +$84K

    vs. prior 12 months

    Last 12mo awards

    7 awards

    8 actions

    Historical and award details for STANTEC CONSULTING SERVICES INC.
    Obligations: prior → latest
    $434K → $517K
    +19.3%
    Share: prior → latest
    1.2% → 3.5%
    +2.3 percentage points
    All-period obligations
    $2.1M
    2.1% 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 reported75
    Reported small business00
    All-period set-aside types

    None reported.

  8. #8

    Last 12mo obligations

    $408K

    2.8%

    Dollar movement

    +$3K

    vs. prior 12 months

    Last 12mo awards

    2 awards

    3 actions

    Historical and award details for CDM FEDERAL PROGRAMS CORPORATION
    Obligations: prior → latest
    $405K → $408K
    +0.9%
    Share: prior → latest
    1.1% → 2.8%
    +1.6 percentage points
    All-period obligations
    $813K
    0.83% 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 reported21
    Reported small business00
    All-period set-aside types

    None reported.

  9. #9

    Last 12mo obligations

    $374K

    2.5%

    Dollar movement

    +$74K

    vs. prior 12 months

    Last 12mo awards

    1 award

    4 actions

    Historical and award details for GSI HAWAII INC
    Obligations: prior → latest
    $300K → $374K
    +24.8%
    Share: prior → latest
    0.84% → 2.5%
    +1.7 percentage points
    All-period obligations
    $674K
    0.69% 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-aside11
    Not reported00
    Reported small business11
    All-period set-aside types

    None reported.

  10. #10

    Last 12mo obligations

    $257K

    1.8%

    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% → 1.8%
    +1.8 percentage points
    All-period obligations
    $257K
    0.26% 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.

  11. #11

    Last 12mo obligations

    $185K

    1.3%

    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% → 1.3%
    +1.3 percentage points
    All-period obligations
    $185K
    0.19% 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.

  12. #12

    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
    0.15% 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.

  13. #13

    Last 12mo obligations

    $145K

    0.99%

    Dollar movement

    +$145K

    vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for QUINN EVANS ARCHITECTS INC
    Obligations: prior → latest
    $0 → $145K
    Not comparable
    Share: prior → latest
    0% → 0.99%
    +1.0 percentage points
    All-period obligations
    $145K
    0.15% of all-period positive obligations · 1 award
    Recorded activity
    Since Aug 28, 2026
    through Aug 28, 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.

  14. #14

    Last 12mo obligations

    $115K

    0.78%

    Dollar movement

    +$115K

    vs. prior 12 months

    Last 12mo awards

    1 award

    2 actions

    Historical and award details for UNIVERSITEIT HASSELT
    Obligations: prior → latest
    $0 → $115K
    Not comparable
    Share: prior → latest
    0% → 0.78%
    +0.8 percentage points
    All-period obligations
    $115K
    0.12% of all-period positive obligations · 1 award
    Recorded activity
    Since May 18, 2026
    through Sep 24, 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.

  15. #15

    Last 12mo obligations

    $90K

    0.61%

    Dollar movement

    $0

    no change vs. prior 12 months

    Last 12mo awards

    1 award

    1 action

    Historical and award details for ACOUSTICAL ANALYSIS ASSOCIATES, INC.
    Obligations: prior → latest
    $90K → $90K
    +0.0%
    Share: prior → latest
    0.25% → 0.61%
    +0.4 percentage points
    All-period obligations
    $419K
    0.43% of all-period positive obligations · 5 awards
    Recorded activity
    Since Apr 26, 2022
    through Feb 18, 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.

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

+$2.1M

TRC ENVIRONMENTAL CORPORATION

FAA

TRC TO 144 AREA Z PFAS REMEDIAL INVESTIGATION PHASE 1B

Why it stands out

The contractor climbed 3 positions in this market.

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

Award net obligations
$2.1M
Share of 12-month positive obligations
14.5%
Supporting data
Prime contractor
#1 · 31.9% share
up 3 ranks · +25.8 percentage points · $2.5M net increase; action accounted for 85.7%
Funding office
#1 · 35.1% attributed share
up 4 ranks · +29.8 percentage points · $3.2M net increase; action accounted for 66.3%
Related:Largest share gainFunding office gain
PIID 692M1526F00311
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 6 positions in this market.

It now ranks #3 by positive obligations over the latest 12 months.

Award net obligations
$5.2M
Share of 12-month positive obligations
12.1%
Supporting data
Prime contractor
#3 · 11.0% share
up 6 ranks · +8.9 percentage points · $882K net increase; action exceeded it by $886K
PIID 693C7322F000038 · Mod P00010
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 5 positions in this market.

It now ranks #5 by positive obligations over the latest 12 months.

Award net obligations
$4.8M
Share of 12-month positive obligations
3.9%
Supporting data
Prime contractor
#5 · 7.0% share
up 5 ranks · +5.4 percentage points · $450K net increase; action exceeded it by $120K
Funding office
#5 · 7.3% attributed share
up 8 ranks · +5.8 percentage points · $521K net increase; action exceeded it by $49K
PIID 693JF722F00082N · Mod P00006
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 3 positions in this market.

It now ranks #2 by positive obligations over the latest 12 months.

Award net obligations
$2.2M
Share of 12-month positive obligations
8.2%
Supporting data
Prime contractor
#2 · 18.1% share
up 3 ranks · +12.9 percentage points · $790K net increase; action exceeded it by $410K
PIID 693JJ325F00267N · Mod P00001
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 4 positions in this market.

It now ranks #7 by positive obligations over the latest 12 months.

Award net obligations
$455K
Share of 12-month positive obligations
3.1%
Supporting data
Funding office
#7 · 5.4% attributed share
up 8 ranks · +4.6 percentage points · $513K net increase; action accounted for 88.6%
PIID 6982AF26F00081N
Modification

This action

+$450K

ICF INCORPORATED, L.L.C.

693KA9 CONTRACTING FOR SERVICES

PURPOSE OF THIS MOD IS TO ADD INCREMENTAL FUNDING.

Why it stands out

This award grew while spending attributed to its office declined.

The modification added $450K while office-attributed obligations fell $440K overall.

Award net obligations
$7.9M
Share of 12-month positive obligations
3.1%
Supporting data
Funding office
#6 · 7.0% attributed share
$440K net decline despite this positive action
PIID 693KA920C00018 · Mod P00024
View recent award activity by date (10)
  1. WSP USA SOLUTIONS INCDeobligation · PIID 693JJ323F00430N
    Action−$7K
    Award net obligations$174K
  2. TRC ENVIRONMENTAL CORPORATIONBase award · PIID 692M1526F00311
    Action+$2.1M
    Award net obligations$2.1M
  3. TRC ENVIRONMENTAL CORPORATIONBase award · PIID 692M1526F00310
    Action+$114K
    Award net obligations$114K
  4. TRC ENVIRONMENTAL CORPORATIONBase award · PIID 692M1526F00308
    Action+$45K
    Award net obligations$45K
  5. WSP USA SOLUTIONS INCBase award · PIID 693JJ326F00099N
    Action+$611K
    Award net obligations$611K
  6. TRC ENVIRONMENTAL CORPORATIONBase award · PIID 692M1526F00307
    Action+$197K
    Award net obligations$197K
  7. ICF INCORPORATED, L.L.C.Modification · PIID 693KA920C00018
    Action+$350K
    Award net obligations$7.9M
  8. WSP USA SOLUTIONS INCBase award · PIID 693JJ326F00093N
    Action+$657K
    Award net obligations$657K
  9. WESTON SOLUTIONS INCDeobligation · PIID 6973GH26F00352
    Action−$742
    Award net obligations$25K
  10. TERRAPHASE ENGINEERING INCModification · PIID 6991PE21P000011
    Action+$9K
    Award net obligations$289K

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 October 12, 2026, TRC ENVIRONMENTAL CORPORATION, WSP USA SOLUTIONS INC, and PACIFIC WESTERN TECHNOLOGIES, LTD. were the leading DOT environmental consulting prime contractors by positive obligations.

  1. #1

    TRC ENVIRONMENTAL CORPORATION

    $4,686,131 in positive obligations

  2. #2

    WSP USA SOLUTIONS INC

    $2,651,184 in positive obligations

  3. #3

    PACIFIC WESTERN TECHNOLOGIES, LTD.

    $1,610,662 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 59.5% from $35,101,030 in the preceding 12 months to $14,229,225 in the 12 months through October 12, 2026.

Latest 12 months
$14,229,225
Net prime contract obligations
Preceding 12 months
$35,101,030
Net prime contract obligations
Change
−59.5%
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 TRC ENVIRONMENTAL CORPORATION, PACIFIC WESTERN TECHNOLOGIES, LTD., and SUSTAINABLE DESIGN CONSORTIUM, (SDC) 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 DOT contracts under NAICS 541620?

From October 13, 2025 through October 12, 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 np.

Positive-obligation awards
45
Leading reported procedure
Np
30.7% of positive obligations
Leading award type
Delivery Order
58% of positive obligations
Full and open
20.3%
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 October 12, 2026. Set-aside and business-size fields reflect award records, not a contractor's current eligibility.

Review data methodology