Top 100 Contractors in PSC F9: Natural Resources – Other Services, FY2022

Name: Top 100 Contractors in PSC F9: Natural Resources – Other Services, 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 F9 contract dollars

Contract obligations: $2,224,996,796 Net of deobligations, by contracts coded PSC F9 or a code under it
Contractors: 730 Parent companies with an obligation
Largest contractor: AECOM $534 million, 22.2% 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	AECOM 8 awardees, including Nuclear Waste Partnership LLC, Ucor LLC and AECOM Technical Services, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army) USAF (Department of the Air Force)	$533,879,700	22.2%	Rank history: #1 in FY2021, not on the FY2023–FY2024 lists and #53 in FY2025; unchanged since FY2021.
2	Sevenson Environmental Services, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$84,664,720	3.5%	Rank history: #8 in FY2021, #9 in FY2023, #4 in FY2024 and #10 in FY2025; up 6 since FY2021.
3	J.f. Brennan Company, Inc. Top agencies EPA (Environmental Protection Agency)	$78,846,700	3.3%	Rank history: not on the FY2021 list, #86 in FY2023 and not on the FY2024–FY2025 lists; new.
4	Hanford Laboratory Management and Integration LLC Top agencies DOE (Department of Energy)	$76,900,323	3.2%	Rank history: #9 in FY2021, #6 in FY2023, #5 in FY2024 and #5 in FY2025; up 5 since FY2021.
5	Ciri Development Corporation 2 awardees, including North Wind Site Services, LLC and North Wind Construction Services, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior)	$66,078,373	2.7%	Rank history: not on the FY2021 list, #78 in FY2023, #94 in FY2024 and not on the FY2025 list; new.
6	Environmental Restoration LLC Top agencies EPA (Environmental Protection Agency)	$59,458,381	2.5%	Rank history: #23 in FY2021, #12 in FY2023, #32 in FY2024 and #24 in FY2025; up 17 since FY2021.
7	Westinghouse Electric Company LLC Through Westinghouse Government Services LLC Top agencies Army (Department of the Army)	$55,974,188	2.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
8	Hydrogeologic, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$51,658,066	2.1%	Rank history: #4 in FY2021, #7 in FY2023, #10 in FY2024 and #8 in FY2025; down 4 since FY2021.
9	Cook Inlet Region Inc. 8 awardees, including North Wind Portage, Inc., North Wind Resource Consulting LLC and North Wind Site Services LLC Top agencies DOE (Department of Energy) Army (Department of the Army) DOI (Department of the Interior)	$39,530,116	1.6%	Rank history: #5 in FY2021, #93 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2021.
10	Seres Engineering & Services LLC 4 awardees, including Seres-Arcadis SB JV2 LLC, Seres-Arcadis 8(A) JV2 LLC and Seres-Arcadis 8(A) JV, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$38,384,182	1.6%	Rank history: #44 in FY2021, #47 in FY2023 and not on the FY2024–FY2025 lists; up 34 since FY2021.
11	EA Engineering, Science, and Technology, Inc., PBC Top agencies Army (Department of the Army) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$37,353,199	1.6%	Rank history: #10 in FY2021, #2 in FY2023, #15 in FY2024 and #13 in FY2025; down 1 since FY2021.
12	Cape Environmental Management Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$36,350,128	1.5%	Rank history: #11 in FY2021, #36 in FY2023, #29 in FY2024 and #30 in FY2025; down 1 since FY2021.
13	Navarro Research and Engineering, Inc. Top agencies DOE (Department of Energy)	$28,725,101	1.2%	Rank history: #12 in FY2021, #11 in FY2023, #14 in FY2024 and #12 in FY2025; down 1 since FY2021.
14	Parsons Corporation Through Parsons Government Services Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$27,316,846	1.1%	Rank history: not on the FY2021 list, #55 in FY2023, #38 in FY2024 and #29 in FY2025; new.
15	BWX Technologies, Inc. Through Nuclear Fuel Services Inc. Top agencies DOE (Department of Energy)	$26,082,986	1.1%	Rank history: not on the FY2021 list, #3 in FY2023, #8 in FY2024 and #7 in FY2025; new.
16	Weston - Er Federal Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$24,758,210	1.0%	Rank history: #7 in FY2021, not on the FY2023 list, #72 in FY2024 and not on the FY2025 list; down 9 since FY2021.
17	Tetra Tech, Inc. 10 awardees, including Ard, Inc. and Tetra TECH EC, Inc. Top agencies USAID (US Agency for International Development) DOE (Department of Energy) EPA (Environmental Protection Agency)	$23,236,556	1.0%	Rank history: #15 in FY2021, #19 in FY2023, #19 in FY2024 and #18 in FY2025; down 2 since FY2021.
18	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$21,406,466	0.9%	Rank history: #27 in FY2021, #24 in FY2023, #20 in FY2024 and #14 in FY2025; up 9 since FY2021.
19	Environmental Chemical Corporation 2 awardees, including ECC Environmental LLC Top agencies Army (Department of the Army) GSA (General Services Administration)	$19,352,943	0.8%	Rank history: #13 in FY2021, #14 in FY2023, #16 in FY2024 and #20 in FY2025; down 6 since FY2021.
20	US Ecology, Inc. 3 awardees, including US Ecology Holdings, Inc., NRC Gulf Environmental Services Inc. and NRC Environmental Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$18,229,404	0.8%	Rank history: not on the FY2021 list, #38 in FY2023, #46 in FY2024 and not on the FY2025 list; new.
21	Aptim Federal Services LLC Top agencies EPA (Environmental Protection Agency) DOE (Department of Energy) Navy (Department of the Navy)	$16,763,047	0.7%	Rank history: #24 in FY2021, #5 in FY2023, #66 in FY2024 and not on the FY2025 list; up 3 since FY2021.
22	Skeo Solutions, Inc. Top agencies EPA (Environmental Protection Agency)	$16,557,431	0.7%	Rank history: #90 in FY2021, #33 in FY2023, #27 in FY2024 and #67 in FY2025; up 68 since FY2021.
23	Pika International, Inc. Top agencies Army (Department of the Army)	$15,985,131	0.7%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
24	Fluor Corporation Through Fluor Idaho LLC Top agencies DOE (Department of Energy)	$15,637,914	0.6%	Rank history: #2 in FY2021 and not on the FY2023–FY2025 lists; down 22 since FY2021.
25	Nuclear Waste Partnership LLC Top agencies DOE (Department of Energy)	$15,466,345	0.6%	Rank history: #6 in FY2021 and not on the FY2023–FY2025 lists; down 19 since FY2021.
26	BTP Services, LLC Top agencies DOE (Department of Energy)	$14,783,022	0.6%	Rank history: #25 in FY2021 and not on the FY2023–FY2025 lists; down 1 since FY2021.
27	Sol Solutions, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$13,887,434	0.6%	Rank history: #22 in FY2021, #32 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2021.
28	Weeks Marine Inc. Top agencies Commerce (Department of Commerce)	$13,602,481	0.6%	Rank history: #3 in FY2021, #26 in FY2023 and not on the FY2024–FY2025 lists; down 25 since FY2021.
29	Weston Solutions Holdings, Inc. 2 awardees, including Weston Solutions Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$13,210,417	0.5%	Rank history: #20 in FY2021, #49 in FY2023, not on the FY2024 list and #92 in FY2025; down 9 since FY2021.
30	ARS Aleut Remediation LLC Through Aleut Remediation LLC Top agencies Army (Department of the Army)	$13,046,293	0.5%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
31	Brice Engineering, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior)	$12,136,402	0.5%	Rank history: #76 in FY2021, #10 in FY2023, #24 in FY2024 and #25 in FY2025; up 45 since FY2021.
32	Hgl-Aptim Applied Science and Technology JV, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$12,081,439	0.5%	Rank history: #81 in FY2021, #67 in FY2023 and not on the FY2024–FY2025 lists; up 49 since FY2021.
33	Four Rivers Nuclear Partnership LLC Top agencies DOE (Department of Energy)	$11,873,151	0.5%	Rank history: #36 in FY2021, #20 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
34	Arctic Slope Regional Corporation 2 awardees, including Environmental Quality Management, Inc. and EQM Services, LLC Top agencies Army (Department of the Army)	$11,226,660	0.5%	Rank history: not on the FY2021 list, #27 in FY2023 and not on the FY2024–FY2025 lists; up 72 since FY2021.
35	Paragon Professional Services LLC Top agencies DOE (Department of Energy) Army (Department of the Army)	$11,044,496	0.5%	Rank history: #34 in FY2021, #22 in FY2023, #28 in FY2024 and #16 in FY2025; down 1 since FY2021.
36	The Solution Foundry, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$10,550,292	0.4%	Rank history: #40 in FY2021, #40 in FY2023, #36 in FY2024 and #28 in FY2025; up 4 since FY2021.
37	Natives of Kodiak, Incorporated 4 awardees, including Koman Government Solutions LLC, Environmental Assessment Services, LLC and Trinity Analysis and Development Corp. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$9,995,252	0.4%	Rank history: #62 in FY2021, #43 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2021.
38	Waste Control Specialists LLC Top agencies DOE (Department of Energy)	$9,606,511	0.4%	Rank history: #35 in FY2021, #46 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2021.
39	Huntington Ingalls Industries, Inc. Through Newport News Nuclear Bwxt-Los Alamos LLC Top agencies DOE (Department of Energy)	$9,469,253	0.4%	Rank history: #51 in FY2021, #39 in FY2023, not on the FY2024 list and #44 in FY2025; up 12 since FY2021.
40	Oneida Nation 3 awardees, including Sustainment & Restoration Services, LLC and Oneida Total Integrated Enterprises LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$9,355,304	0.4%	Rank history: #53 in FY2021, #52 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2021.
41	Bay West-Ahtna Joint Venture, LLC Top agencies Army (Department of the Army)	$9,298,155	0.4%	Rank history: #14 in FY2021 and not on the FY2023–FY2025 lists; down 27 since FY2021.
42	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$9,261,818	0.4%	Rank history: #49 in FY2021, #25 in FY2023, #17 in FY2024 and #27 in FY2025; up 7 since FY2021.
43	GSI Mmrp JV LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$9,112,132	0.4%	Rank history: #71 in FY2021, #65 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2021.
44	Umyuaq Consulting Group, LLC Top agencies Army (Department of the Army)	$9,078,275	0.4%	Rank history: #75 in FY2021, #75 in FY2023, #84 in FY2024 and not on the FY2025 list; up 31 since FY2021.
45	SES Civil and Environmental LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$8,986,754	0.4%	Rank history: #54 in FY2021, #34 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2021.
46	Brice-Aecom JV1 Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$8,776,578	0.4%	Rank history: #17 in FY2021, #28 in FY2023 and not on the FY2024–FY2025 lists; down 29 since FY2021.
47	Environmental Rail Solutions Inc. Top agencies Army (Department of the Army)	$8,472,150	0.4%	Rank history: not on the FY2021 list, #31 in FY2023, #23 in FY2024 and #32 in FY2025; new.
48	Ahtna Solutions, LLC Top agencies USAF (Department of the Air Force)	$8,466,908	0.4%	Rank history: not on the FY2021 list, not on the FY2023 list, #83 in FY2024 and not on the FY2025 list; new.
49	Calista Corp Through Brice Environmental Services Corporation Top agencies Army (Department of the Army)	$8,249,464	0.3%	Rank history: #61 in FY2021 and not on the FY2023–FY2025 lists; up 12 since FY2021.
50	Lg2-Qri JV LLC Top agencies Army (Department of the Army)	$8,219,426	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 57 since FY2021.
51	Genwest Systems Inc. Top agencies Commerce (Department of Commerce)	$8,102,020	0.3%	Rank history: #43 in FY2021, #61 in FY2023, not on the FY2024 list and #75 in FY2025; down 8 since FY2021.
52	Bhate Environmental Associates, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$7,984,259	0.3%	Rank history: #57 in FY2021, #68 in FY2023, #87 in FY2024 and #68 in FY2025; up 5 since FY2021.
53	Bay West LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$7,646,391	0.3%	Rank history: #47 in FY2021, #21 in FY2023, #22 in FY2024 and #19 in FY2025; down 6 since FY2021.
54	Native Hawaiian Community Development Corporation 2 awardees, including GSI North America Inc. and GSI Pacific Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$7,639,288	0.3%	Rank history: not on the FY2021 list, #29 in FY2023, #78 in FY2024 and not on the FY2025 list; new.
55	Bb&E, Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$7,325,828	0.3%	Rank history: #48 in FY2021, #60 in FY2023, #48 in FY2024 and #38 in FY2025; down 7 since FY2021.
56	ECO & Associates, Inc. Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense)	$6,805,083	0.3%	Rank history: #85 in FY2021 and not on the FY2023–FY2025 lists; up 29 since FY2021.
57	General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$6,717,433	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
58	EQ & CH Remediation Top agencies EPA (Environmental Protection Agency)	$6,635,994	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
59	Engineering / Remediation Resources Group, Inc. 2 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$6,511,529	0.3%	Rank history: not on the FY2021 list, #48 in FY2023 and not on the FY2024–FY2025 lists; up 65 since FY2021.
60	Seres-Arcadis SB JV, LLC Top agencies Army (Department of the Army)	$6,388,945	0.3%	Rank history: #70 in FY2021, #74 in FY2023, #30 in FY2024 and #60 in FY2025; up 10 since FY2021.
61	Global Science & Technology, LLC Top agencies Commerce (Department of Commerce)	$6,210,820	0.3%	Rank history: not on the FY2021 list, #56 in FY2023, #45 in FY2024 and #42 in FY2025; new.
62	Link Technologies Inc. Top agencies DOE (Department of Energy)	$6,134,572	0.3%	Rank history: #60 in FY2021, #62 in FY2023, #52 in FY2024 and #50 in FY2025; down 2 since FY2021.
63	Aerostar Environmental and Construction LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$6,003,006	0.2%	Rank history: not on the FY2021 list, #57 in FY2023, #39 in FY2024 and #43 in FY2025; up 48 since FY2021.
64	Dawson Solutions, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$5,863,997	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 37 since FY2021.
65	Ahtna, Incorporated 3 awardees, including Ahtna Global LLC, Ahtna Environmental, Inc. and Ahtna Engineering Services, LLC Top agencies Army (Department of the Army)	$5,836,492	0.2%	Rank history: #30 in FY2021, #45 in FY2023 and not on the FY2024–FY2025 lists; down 35 since FY2021.
66	Industrial Economics Inc. Top agencies Commerce (Department of Commerce) EPA (Environmental Protection Agency) DOI (Department of the Interior)	$5,805,886	0.2%	Rank history: #95 in FY2021, #51 in FY2023, #56 in FY2024 and #74 in FY2025; up 29 since FY2021.
67	Cti-Tpmc Environmental Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$5,707,499	0.2%	Rank history: #77 in FY2021, #70 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2021.
68	Bhate Zapata, LLC Top agencies Army (Department of the Army)	$5,631,479	0.2%	Rank history: #18 in FY2021, #37 in FY2023, #76 in FY2024 and not on the FY2025 list; down 50 since FY2021.
69	Aerostar SES LLC 2 awardees Top agencies Army (Department of the Army)	$5,567,893	0.2%	Rank history: #38 in FY2021, #41 in FY2023 and not on the FY2024–FY2025 lists; down 31 since FY2021.
70	Environmental Research Group, L.L.C. Top agencies Army (Department of the Army) Navy (Department of the Navy) DHS (Department of Homeland Security)	$5,412,808	0.2%	Rank history: #72 in FY2021 and not on the FY2023–FY2025 lists; up 2 since FY2021.
71	Oregon University System 2 awardees, including Portland State University and Oregon State University Top agencies DOI (Department of the Interior) Commerce (Department of Commerce)	$5,410,996	0.2%	Rank history: #56 in FY2021 and not on the FY2023–FY2025 lists; down 15 since FY2021.
72	Chemtech Consulting Group Inc. Top agencies EPA (Environmental Protection Agency)	$5,132,730	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 67 since FY2021.
73	Ayuda Arcadis 8A Joint Venture LLC Top agencies Army (Department of the Army)	$4,905,248	0.2%	Rank history: #33 in FY2021, #82 in FY2023, #51 in FY2024 and #79 in FY2025; down 40 since FY2021.
74	DAI Global LLC Top agencies USAID (US Agency for International Development)	$4,900,000	0.2%	Rank history: #42 in FY2021 and not on the FY2023–FY2025 lists; down 32 since FY2021.
75	Renova-Sovereign Joint Venture Top agencies Army (Department of the Army)	$4,837,257	0.2%	Rank history: #64 in FY2021, not on the FY2023–FY2024 lists and #96 in FY2025; down 11 since FY2021.
76	3D Envirologics LLC Top agencies HHS (Department of Health and Human Services)	$4,652,726	0.2%	Rank history: not on the FY2021 list, #53 in FY2023 and not on the FY2024–FY2025 lists; up 39 since FY2021.
77	Ioei-Eqm JV Top agencies Army (Department of the Army)	$4,603,336	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 67 since FY2021.
78	Ayuda-Plexus Joint Venture LLC Top agencies Army (Department of the Army)	$4,533,017	0.2%	Rank history: #41 in FY2021, not on the FY2023 list, #96 in FY2024 and not on the FY2025 list; down 37 since FY2021.
79	Tekpro Support Services, LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force)	$4,416,027	0.2%	Rank history: #78 in FY2021, #79 in FY2023, #74 in FY2024 and #63 in FY2025; down 1 since FY2021.
80	Northwind-Jacobs Joint Venture Top agencies Army (Department of the Army)	$4,404,151	0.2%	Rank history: not on the FY2021 list, #17 in FY2023, #54 in FY2024 and not on the FY2025 list; up 47 since FY2021.
81	Confederated Salish and Kootenai Tribes 2 awardees, including S & K Logistics Services LLC and S & K Federal Services LLC Top agencies DOE (Department of Energy)	$4,354,793	0.2%	Rank history: #59 in FY2021, #35 in FY2023, #65 in FY2024 and not on the FY2025 list; down 22 since FY2021.
82	The NDN Sundance JV LLC Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense)	$4,345,752	0.2%	Rank history: #67 in FY2021 and not on the FY2023–FY2025 lists; down 15 since FY2021.
83	Ch2M Hill, Inc. Top agencies EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$4,138,530	0.2%	Rank history: not on the FY2021 list, not on the FY2023 list, #50 in FY2024 and #94 in FY2025; new.
84	Innovex-Errg Joint Venture Top agencies Army (Department of the Army)	$4,087,819	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 84 since FY2021.
85	Jacobs Engineering Group Inc. 4 awardees, including Ch2M Hill, Inc. and Ch2M Hill Constructors, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$4,060,035	0.2%	Rank history: #19 in FY2021, #4 in FY2023, #2 in FY2024 and not on the FY2025 list; down 66 since FY2021.
86	Noblis, Inc. Top agencies USAF (Department of the Air Force)	$4,038,218	0.2%	Rank history: not on the FY2021 list, #88 in FY2023, not on the FY2024 list and #72 in FY2025; new.
87	The Great Basin Institute Top agencies DOI (Department of the Interior)	$4,028,597	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 27 since FY2021.
88	Azura Consulting LLC Top agencies Commerce (Department of Commerce)	$3,955,377	0.2%	Rank history: not on the FY2021 list, #73 in FY2023, #77 in FY2024 and #87 in FY2025; up 189 since FY2021.
89	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies EPA (Environmental Protection Agency) USAID (US Agency for International Development)	$3,907,934	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 68 since FY2021.
90	Sip West JV Top agencies Army (Department of the Army)	$3,907,593	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 32 since FY2021.
91	Tepa, LLC 3 awardees, including Tehama, LLC, Tehama ECS LLC and Tepa EC, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$3,890,901	0.2%	Rank history: #65 in FY2021, #87 in FY2023 and not on the FY2024–FY2025 lists; down 26 since FY2021.
92	R & K Enterprise Solutions Inc. Top agencies DHS (Department of Homeland Security)	$3,849,792	0.2%	Rank history: #83 in FY2021 and not on the FY2023–FY2025 lists; down 9 since FY2021.
93	Marstel-Day, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$3,826,693	0.2%	Rank history: not on the FY2021 list, #58 in FY2023, not on the FY2024 list and #98 in FY2025; new.
94	Bonner Analytical Testing Co Top agencies EPA (Environmental Protection Agency)	$3,687,536	0.2%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #59 in FY2025; up 146 since FY2021.
95	ABT Global LLC 2 awardees Top agencies EPA (Environmental Protection Agency) Commerce (Department of Commerce)	$3,669,637	0.2%	Rank history: #82 in FY2021, #90 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2021.
96	Association of Consultants and Engineers Top agencies Navy (Department of the Navy)	$3,658,961	0.2%	Rank history: #80 in FY2021, #50 in FY2023 and not on the FY2024–FY2025 lists; down 16 since FY2021.
97	North Wind Portage, Inc. Top agencies DOE (Department of Energy)	$3,608,536	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
98	SRS Battelle JV, LLC Top agencies Army (Department of the Army)	$3,544,326	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
99	Chemtex Environmental Laboratory, Inc. Top agencies EPA (Environmental Protection Agency)	$3,302,542	0.1%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #57 in FY2025; up 146 since FY2021.
100	Auxilio FPM Joint Venture LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$3,292,753	0.1%	Rank history: #69 in FY2021 and not on the FY2023–FY2025 lists; down 31 since FY2021.

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100 of 730 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC F9

Code	Net obligations	Largest contractor
F999 Other Environmental Services, Studies, and Analytical Support	$2,224,996,796	AECOM

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 $2.41 billion 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 F9 contractors in FY2022?

1. AECOM ($534M), 2. Sevenson Environmental Services, Inc. ($84.7M), 3. J.f. Brennan Company, Inc. ($78.8M), 4. Hanford Laboratory Management and Integration LLC ($76.9M), 5. Ciri Development Corporation ($66.1M), 6. Environmental Restoration LLC ($59.5M), 7. Westinghouse Electric Company LLC ($56M), 8. Hydrogeologic, Inc. ($51.7M), 9. Cook Inlet Region Inc. ($39.5M), 10. Seres Engineering & Services LLC ($38.4M).

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