Top 100 Contractors in PSC B510: Environmental Studies and Assessments, FY2022

Name: Top 100 Contractors in PSC B510: Environmental Studies and Assessments, FY2022
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2021 – Sep 30, 2022 Code page on GovTribe

The top 10 won 45% of FY2022 PSC B510 contract dollars

Contract obligations: $180,439,770 Net of deobligations, by contracts coded PSC B510
Contractors: 317 Parent companies with an obligation
Largest contractor: Couvillion Group LLC $16.2 million, 8.3% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Couvillion Group LLC Top agencies DOI (Department of the Interior)	$16,223,580	8.3%	Rank history: not on the FY2021 list, not on the FY2023 list, #16 in FY2024 and not on the FY2025 list; new.
2	Tetra Tech, Inc. 5 awardees, including Tetra TECH EC, Inc. and Tetra TECH International Inc. Zweigniederlassung Deutschland Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior) Army (Department of the Army)	$14,285,204	7.3%	Rank history: #7 in FY2021, #1 in FY2023, #3 in FY2024 and #2 in FY2025; up 5 since FY2021.
3	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies DOI (Department of the Interior) DOT (Department of Transportation) EPA (Environmental Protection Agency)	$11,604,978	5.9%	Rank history: #5 in FY2021, #8 in FY2023, #26 in FY2024 and not on the FY2025 list; up 2 since FY2021.
4	Environmental Management & Planning Solutions LLC Top agencies DOI (Department of the Interior)	$11,447,962	5.9%	Rank history: #3 in FY2021, #2 in FY2023, #70 in FY2024 and not on the FY2025 list; down 1 since FY2021.
5	AECOM 3 awardees, including AECOM Technical Services, Inc. and AECOM Italia S.P.A. Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior) Army (Department of the Army)	$7,494,334	3.8%	Rank history: #22 in FY2021, #3 in FY2023, #12 in FY2024 and #30 in FY2025; up 17 since FY2021.
6	Pb&A / CSS JV, Llc. Top agencies EPA (Environmental Protection Agency)	$6,427,248	3.3%	Rank history: not on the FY2021 list, #7 in FY2023, #40 in FY2024 and not on the FY2025 list; new.
7	Jacobs Engineering Group Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior) EPA (Environmental Protection Agency)	$6,181,149	3.2%	Rank history: not on the FY2021 list, #9 in FY2023 and not on the FY2024–FY2025 lists; up 138 since FY2021.
8	WSP USA Solutions Inc. Top agencies DOE (Department of Energy) DOI (Department of the Interior)	$5,147,711	2.6%	Rank history: #8 in FY2021, #14 in FY2023, #21 in FY2024 and not on the FY2025 list; unchanged since FY2021.
9	Swca, Incorporated 3 awardees Top agencies DOI (Department of the Interior)	$5,001,846	2.6%	Rank history: #21 in FY2021, #5 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2021.
10	Kgsne JV II LLC Top agencies EPA (Environmental Protection Agency)	$4,300,000	2.2%	Rank history: not on the FY2021 list, #17 in FY2023, #22 in FY2024 and #11 in FY2025; new.
11	Ahtna, Incorporated 2 awardees, including Ahtna Global LLC Top agencies Army (Department of the Army)	$4,106,258	2.1%	Rank history: #17 in FY2021, #19 in FY2023, #91 in FY2024 and not on the FY2025 list; up 6 since FY2021.
12	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency) USDA (Department of Agriculture)	$3,786,807	1.9%	Rank history: #2 in FY2021, #13 in FY2023, #7 in FY2024 and #6 in FY2025; down 10 since FY2021.
13	D7, LLC 2 awardees Top agencies DHS (Department of Homeland Security)	$3,636,924	1.9%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
14	Consolidated Safety Services Incorporated Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior)	$3,631,140	1.9%	Rank history: #9 in FY2021, #15 in FY2023, #15 in FY2024 and #10 in FY2025; down 5 since FY2021.
15	The Clark Group. Llc Top agencies USDA (Department of Agriculture) DOJ (Department of Justice)	$3,176,859	1.6%	Rank history: #28 in FY2021, #29 in FY2023, #9 in FY2024 and not on the FY2025 list; up 13 since FY2021.
16	Rmec Environmental, LLC Top agencies Army (Department of the Army)	$2,765,846	1.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
17	Pact, Inc. Top agencies USAID (US Agency for International Development)	$2,650,000	1.4%	Rank history: #4 in FY2021, #57 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2021.
18	Northland Research, Inc. Top agencies DHS (Department of Homeland Security)	$2,632,441	1.3%	Rank history: #33 in FY2021, #23 in FY2023, #27 in FY2024 and not on the FY2025 list; up 15 since FY2021.
19	State of California Controllers Office Through University of California, Davis Top agencies EPA (Environmental Protection Agency)	$2,283,666	1.2%	Rank history: #10 in FY2021, #11 in FY2023, #25 in FY2024 and not on the FY2025 list; down 9 since FY2021.
20	EA Engineering, Science, and Technology, Inc., PBC Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior)	$2,185,483	1.1%	Rank history: #13 in FY2021, #60 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2021.
21	The NDN Sundance JV LLC Top agencies Army (Department of the Army)	$1,911,883	1.0%	Rank history: #62 in FY2021, #56 in FY2023, #58 in FY2024 and not on the FY2025 list; up 41 since FY2021.
22	Stantec Incorporated 4 awardees, including Stantec Consulting Services Inc. Top agencies HHS (Department of Health and Human Services) GSA (General Services Administration)	$1,782,463	0.9%	Rank history: #1 in FY2021 and not on the FY2023–FY2025 lists; down 21 since FY2021.
23	Quaternary Resource Investigations, L.L.C. Top agencies GSA (General Services Administration) DOI (Department of the Interior) Army (Department of the Army)	$1,774,029	0.9%	Rank history: #91 in FY2021, #24 in FY2023, #43 in FY2024 and not on the FY2025 list; up 68 since FY2021.
24	Recon Environmental,Inc. Top agencies DHS (Department of Homeland Security)	$1,744,162	0.9%	Rank history: #46 in FY2021, #55 in FY2023, #14 in FY2024 and not on the FY2025 list; up 22 since FY2021.
25	Dawson Solutions, Inc. Top agencies DHS (Department of Homeland Security)	$1,460,578	0.7%	Rank history: #35 in FY2021 and not on the FY2023–FY2025 lists; up 10 since FY2021.
26	Land IQ, LLC Top agencies DOI (Department of the Interior)	$1,432,457	0.7%	Rank history: #19 in FY2021, #38 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2021.
27	Environmental Testing and Consulting, Inc. Top agencies Army (Department of the Army)	$1,381,297	0.7%	Rank history: not on the FY2021 list, #30 in FY2023, #30 in FY2024 and #21 in FY2025; up 143 since FY2021.
28	Anamar Environmental Consulting, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$1,312,599	0.7%	Rank history: #18 in FY2021, #32 in FY2023, #33 in FY2024 and #18 in FY2025; down 10 since FY2021.
29	Meca Consulting Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,240,547	0.6%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 190 since FY2021.
30	Sundance Consultants, LLC Top agencies Army (Department of the Army)	$1,209,836	0.6%	Rank history: not on the FY2021 list, not on the FY2023 list, #80 in FY2024 and not on the FY2025 list; up 220 since FY2021.
31	Salas O'brien Federal, LLC Top agencies Army (Department of the Army)	$1,126,712	0.6%	Rank history: #26 in FY2021 and not on the FY2023–FY2025 lists; down 5 since FY2021.
32	Industrial Economics Inc. Top agencies DOI (Department of the Interior) EPA (Environmental Protection Agency) DOE (Department of Energy)	$1,065,888	0.5%	Rank history: #15 in FY2021, #43 in FY2023, #93 in FY2024 and not on the FY2025 list; down 17 since FY2021.
33	Mabbett & Associates, Inc. Top agencies VA (Department of Veterans Affairs) EPA (Environmental Protection Agency) GSA (General Services Administration)	$1,050,039	0.5%	Rank history: #39 in FY2021, not on the FY2023 list, #55 in FY2024 and #59 in FY2025; up 6 since FY2021.
34	UIC Government Services LLC Through Bowhead Total Enterprise Solutions, LLC Top agencies Army (Department of the Army)	$1,036,810	0.5%	Rank history: not on the FY2021 list, #54 in FY2023 and not on the FY2024–FY2025 lists; new.
35	Southeastern Archaeological Research Inc. 2 awardees Top agencies Army (Department of the Army)	$1,024,914	0.5%	Rank history: #23 in FY2021, #48 in FY2023, #54 in FY2024 and #15 in FY2025; down 12 since FY2021.
36	Environmental Science Corporation Top agencies Army (Department of the Army)	$1,015,831	0.5%	Rank history: #36 in FY2021, #46 in FY2023, #62 in FY2024 and #25 in FY2025; unchanged since FY2021.
37	Wood Environment & Infrastructure Solutions Inc. Through WSP USA Environment & Infrastructure Inc. Top agencies EPA (Environmental Protection Agency)	$990,853	0.5%	Rank history: #32 in FY2021, #62 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2021.
38	Swift River Versar JV Top agencies Navy (Department of the Navy)	$974,271	0.5%	Rank history: #45 in FY2021, #44 in FY2023, #24 in FY2024 and #81 in FY2025; up 7 since FY2021.
39	Ardl Inc. Top agencies Army (Department of the Army)	$948,559	0.5%	Rank history: not on the FY2021 list, #28 in FY2023, not on the FY2024 list and #32 in FY2025; new.
40	Potomac-Hudson Engineering Inc. Top agencies GSA (General Services Administration) DOS (Department of State) USAF (Department of the Air Force)	$939,764	0.5%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 97 since FY2021.
41	Horsley Witten Group, Inc. Top agencies EPA (Environmental Protection Agency)	$939,350	0.5%	Rank history: #12 in FY2021, #40 in FY2023, #32 in FY2024 and #38 in FY2025; down 29 since FY2021.
42	Gulf South Research Corp Top agencies DHS (Department of Homeland Security) Army (Department of the Army)	$891,332	0.5%	Rank history: #6 in FY2021 and not on the FY2023–FY2025 lists; down 36 since FY2021.
43	Truescape Limited Top agencies DOI (Department of the Interior)	$827,472	0.4%	Rank history: not on the FY2021 list, not on the FY2023 list, #48 in FY2024 and #51 in FY2025; new.
44	Environmental Science Associates Top agencies USDA (Department of Agriculture) DOI (Department of the Interior) DOT (Department of Transportation)	$804,819	0.4%	Rank history: not on the FY2021 list, #37 in FY2023 and not on the FY2024–FY2025 lists; new.
45	Louis Berger U.S. Inc. Through WSP USA Solutions Inc. Top agencies DOI (Department of the Interior)	$802,056	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
46	The Verification Research Training and Information Centre (Vertic) Top agencies DOS (Department of State)	$784,878	0.4%	Rank history: #97 in FY2021, #83 in FY2023 and not on the FY2024–FY2025 lists; up 51 since FY2021.
47	Hdr, Inc. Through HDR Environmental, Operations and Construction, Inc. Top agencies Navy (Department of the Navy)	$783,284	0.4%	Rank history: #83 in FY2021, #31 in FY2023, #4 in FY2024 and #4 in FY2025; up 36 since FY2021.
48	Dong Myung Enterprise Co., Ltd. Top agencies Army (Department of the Army)	$738,584	0.4%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #97 in FY2025; new.
49	Oneida Nation Through OCH JV Top agencies EPA (Environmental Protection Agency)	$722,805	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 66 since FY2021.
50	WSP USA Environment & Infrastructure Inc. Top agencies DHS (Department of Homeland Security)	$708,330	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
51	Bb&E, Inc. Top agencies DOI (Department of the Interior)	$700,890	0.4%	Rank history: not on the FY2021 list, #72 in FY2023 and not on the FY2024–FY2025 lists; up 67 since FY2021.
52	Neptune and Company, Incorporated Top agencies DOE (Department of Energy) Army (Department of the Army)	$655,000	0.3%	Rank history: #61 in FY2021, #18 in FY2023, #28 in FY2024 and #13 in FY2025; up 9 since FY2021.
53	Native Hawaiian Community Development Corporation Through GSI Pacific Inc. Top agencies Army (Department of the Army)	$654,332	0.3%	Rank history: not on the FY2021 list, #59 in FY2023 and not on the FY2024–FY2025 lists; new.
54	Bayside Engineering Construction Inc. Top agencies Army (Department of the Army)	$639,465	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
55	Seres Engineering & Services LLC Top agencies USAF (Department of the Air Force)	$635,260	0.3%	Rank history: not on the FY2021 list, not on the FY2023 list, #61 in FY2024 and not on the FY2025 list; up 192 since FY2021.
56	Panamerican Consultants Inc. Top agencies Army (Department of the Army)	$621,298	0.3%	Rank history: #30 in FY2021 and not on the FY2023–FY2025 lists; down 26 since FY2021.
57	LG2 Environmental Solutions, Inc. Top agencies Army (Department of the Army)	$616,460	0.3%	Rank history: #20 in FY2021, #49 in FY2023, #69 in FY2024 and #27 in FY2025; down 37 since FY2021.
58	Marstel-Day, LLC Top agencies DOI (Department of the Interior) USAF (Department of the Air Force)	$592,784	0.3%	Rank history: #88 in FY2021, #47 in FY2023, #77 in FY2024 and #49 in FY2025; up 30 since FY2021.
59	Hoolaulima Government Solutions, LLC Top agencies Army (Department of the Army)	$590,820	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
60	ERO Resources Corporation Top agencies USDA (Department of Agriculture) GSA (General Services Administration)	$574,150	0.3%	Rank history: not on the FY2021 list, #39 in FY2023, #46 in FY2024 and #64 in FY2025; up 117 since FY2021.
61	Summitec Corp Top agencies EPA (Environmental Protection Agency)	$560,942	0.3%	Rank history: #37 in FY2021 and not on the FY2023–FY2025 lists; down 24 since FY2021.
62	Aspen Environmental Group Top agencies DOI (Department of the Interior)	$545,880	0.3%	Rank history: #72 in FY2021 and not on the FY2023–FY2025 lists; up 10 since FY2021.
63	ASM Affiliates Inc. Top agencies DOI (Department of the Interior)	$545,000	0.3%	Rank history: not on the FY2021 list, not on the FY2023 list, #74 in FY2024 and not on the FY2025 list; new.
64	Harris Environmental Group Inc. 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$544,524	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 68 since FY2021.
65	DCR Services & Construction Inc. Top agencies DOI (Department of the Interior)	$516,666	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
66	Copperhead Environmental Consulting Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior) DOT (Department of Transportation)	$504,581	0.3%	Rank history: not on the FY2021 list, #63 in FY2023, #97 in FY2024 and not on the FY2025 list; new.
67	DHI Through DHI Water & Environment, Inc. Top agencies DOI (Department of the Interior)	$489,870	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
68	Meadows Cmpg, Inc. Top agencies Navy (Department of the Navy)	$460,990	0.2%	Rank history: #60 in FY2021 and not on the FY2023–FY2025 lists; down 8 since FY2021.
69	MBK Engineers Top agencies DOI (Department of the Interior)	$455,400	0.2%	Rank history: #58 in FY2021, #67 in FY2023, #13 in FY2024 and #53 in FY2025; down 11 since FY2021.
70	Environmental Solutions & Innovations, Inc. Top agencies USDA (Department of Agriculture)	$446,206	0.2%	Rank history: #79 in FY2021, #52 in FY2023, #56 in FY2024 and not on the FY2025 list; up 9 since FY2021.
71	Espinoza Cultural Services, LLC Top agencies DOE (Department of Energy) DOI (Department of the Interior)	$442,196	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
72	Blue World Research Institute Inc. Top agencies DOI (Department of the Interior)	$416,000	0.2%	Rank history: #24 in FY2021, #16 in FY2023, #38 in FY2024 and #40 in FY2025; down 48 since FY2021.
73	Global Consulting Inc. Top agencies HHS (Department of Health and Human Services)	$371,019	0.2%	Rank history: #67 in FY2021, #65 in FY2023, #53 in FY2024 and #41 in FY2025; down 6 since FY2021.
74	Apec Co., Ltd Top agencies Army (Department of the Army)	$362,000	0.2%	Rank history: #76 in FY2021 and not on the FY2023–FY2025 lists; up 2 since FY2021.
75	President and Fellows of Middlebury College Top agencies DOS (Department of State)	$350,000	0.2%	Rank history: not on the FY2021 list, #75 in FY2023 and not on the FY2024–FY2025 lists; up 29 since FY2021.
76	Bowhead Total Enterprise Solutions, LLC Top agencies Army (Department of the Army)	$331,282	0.2%	Rank history: #50 in FY2021 and not on the FY2023–FY2025 lists; down 26 since FY2021.
77	Cornell University Top agencies HUD (Department of Housing and Urban Development)	$326,001	0.2%	Rank history: not on the FY2021 list, #81 in FY2023 and not on the FY2024–FY2025 lists; new.
78	Asir LLC Top agencies DOI (Department of the Interior)	$314,428	0.2%	Rank history: #82 in FY2021, #79 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2021.
79	Ecosystem Research Group LLC Top agencies USDA (Department of Agriculture)	$306,948	0.2%	Rank history: #34 in FY2021 and not on the FY2023–FY2025 lists; down 45 since FY2021.
80	Agralytica, Inc. Top agencies USDA (Department of Agriculture)	$303,758	0.2%	Rank history: not on the FY2021 list, #76 in FY2023 and not on the FY2024–FY2025 lists; new.
81	ECO Analysts, LLC Top agencies Army (Department of the Army)	$281,869	0.1%	Rank history: not on the FY2021 list, #87 in FY2023 and not on the FY2024–FY2025 lists; up 82 since FY2021.
82	Dj&A, P.C. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$269,135	0.1%	Rank history: #69 in FY2021 and not on the FY2023–FY2025 lists; down 13 since FY2021.
83	Bluestone Environmental Group, Inc. Top agencies Army (Department of the Army)	$265,000	0.1%	Rank history: not on the FY2021 list, #73 in FY2023, not on the FY2024 list and #67 in FY2025; new.
84	First Environment Inc. Top agencies VA (Department of Veterans Affairs)	$258,777	0.1%	Rank history: not on the FY2021 list, not on the FY2023 list, #50 in FY2024 and not on the FY2025 list; new.
85	European Leadership Network Top agencies DOS (Department of State)	$252,782	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
86	Institute for Defense Analyses Top agencies DOS (Department of State)	$250,000	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
87	National League of Cities Institute Top agencies HUD (Department of Housing and Urban Development)	$249,720	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
88	Water & Air Research, Inc. Top agencies Army (Department of the Army)	$247,845	0.1%	Rank history: #59 in FY2021, #100 in FY2023, #71 in FY2024 and #58 in FY2025; down 29 since FY2021.
89	Lehigh University Top agencies DOS (Department of State)	$247,346	0.1%	Rank history: #56 in FY2021 and not on the FY2023–FY2025 lists; down 33 since FY2021.
90	Pacific Forum International Top agencies DOS (Department of State)	$242,404	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
91	DH Environmental, Inc. Top agencies USDA (Department of Agriculture)	$240,015	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 64 since FY2021.
92	OYO Corporation Top agencies Navy (Department of the Navy)	$236,825	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
93	Professional Environmental Engineers, Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$227,396	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 196 since FY2021.
94	GEO & GEO S.R.L. Top agencies Army (Department of the Army)	$227,317	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 22 since FY2021.
95	Credere Associates, LLC Top agencies Army (Department of the Army)	$225,138	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
96	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies DOI (Department of the Interior)	$220,801	0.1%	Rank history: not on the FY2021 list, #85 in FY2023 and not on the FY2024–FY2025 lists; up 26 since FY2021.
97	Environmental Cost Management, Inc. Top agencies DOI (Department of the Interior)	$216,616	0.1%	Rank history: not on the FY2021 list, not on the FY2023 list, #85 in FY2024 and #73 in FY2025; up 42 since FY2021.
98	Arcadis of New York, Inc. Top agencies DHS (Department of Homeland Security)	$214,782	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
99	RNA - Ricerca Natura API S.R.L. Top agencies Army (Department of the Army)	$211,778	0.1%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #98 in FY2025; up 31 since FY2021.
100	Toeroek Associates, Inc. Top agencies EPA (Environmental Protection Agency)	$205,990	0.1%	Rank history: not on the FY2021 list, #93 in FY2023, #86 in FY2024 and not on the FY2025 list; new.

Show 75 more

100 of 317 contractors listed here. See the rest on GovTribe.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $195 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2022 ran Oct 1, 2021 – Sep 30, 2022. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2021. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2021 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC B510 contractors in FY2022?

1. Couvillion Group LLC ($16.2M), 2. Tetra Tech, Inc. ($14.3M), 3. ICF International, Inc. ($11.6M), 4. Environmental Management & Planning Solutions LLC ($11.4M), 5. AECOM ($7.49M), 6. Pb&A / CSS JV, Llc. ($6.43M), 7. Jacobs Engineering Group Inc. ($6.18M), 8. WSP USA Solutions Inc. ($5.15M), 9. Swca, Incorporated ($5M), 10. Kgsne JV II LLC ($4.3M).

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