Top 100 Contractors in PSC F9: Natural Resources – Other Services, FY2023

Name: Top 100 Contractors in PSC F9: Natural Resources – Other Services, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 50% of FY2023 PSC F9 contract dollars

Contract obligations: $2,643,600,790 Net of deobligations, by contracts coded PSC F9 or a code under it
Contractors: 743 Parent companies with an obligation
Largest contractor: United Cleanup Oak Ridge LLC $753 million, 25.0% 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	United Cleanup Oak Ridge LLC Top agencies DOE (Department of Energy)	$752,637,900	25.0%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2024 and #3 in FY2025; new.
2	EA Engineering, Science, and Technology, Inc., PBC Top agencies Army (Department of the Army) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$125,991,061	4.2%	Rank history: #10 in FY2021, #11 in FY2022, #15 in FY2024 and #13 in FY2025; up 9 since FY2022.
3	BWX Technologies, Inc. 2 awardees, including Nuclear Fuel Services Inc. and Bwxt Nuclear Operations Group, Inc. Top agencies DOE (Department of Energy)	$111,160,776	3.7%	Rank history: not on the FY2021 list, #15 in FY2022, #8 in FY2024 and #7 in FY2025; up 12 since FY2022.
4	Jacobs Engineering Group Inc. 5 awardees, including Idaho Environmental Coalition LLC, Ch2M Hill, Inc. and Jacobs Government Services Company Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$109,947,680	3.7%	Rank history: #19 in FY2021, #85 in FY2022, #2 in FY2024 and not on the FY2025 list; up 81 since FY2022.
5	Aptim Federal Services LLC 2 awardees Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency) Navy (Department of the Navy)	$100,596,618	3.3%	Rank history: #24 in FY2021, #21 in FY2022, #66 in FY2024 and not on the FY2025 list; up 16 since FY2022.
6	Hanford Laboratory Management and Integration LLC Top agencies DOE (Department of Energy)	$85,471,763	2.8%	Rank history: #9 in FY2021, #4 in FY2022, #5 in FY2024 and #5 in FY2025; down 2 since FY2022.
7	Hydrogeologic, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$68,595,915	2.3%	Rank history: #4 in FY2021, #8 in FY2022, #10 in FY2024 and #8 in FY2025; up 1 since FY2022.
8	Aptim-Amentum Alaska Decommissioning LLC Top agencies Army (Department of the Army)	$65,253,684	2.2%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2024 and #69 in FY2025; new.
9	Sevenson Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$46,614,961	1.5%	Rank history: #8 in FY2021, #2 in FY2022, #4 in FY2024 and #10 in FY2025; down 7 since FY2022.
10	Brice Engineering, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOI (Department of the Interior)	$37,813,694	1.3%	Rank history: #76 in FY2021, #31 in FY2022, #24 in FY2024 and #25 in FY2025; up 21 since FY2022.
11	Navarro Research and Engineering, Inc. Top agencies DOE (Department of Energy)	$37,258,364	1.2%	Rank history: #12 in FY2021, #13 in FY2022, #14 in FY2024 and #12 in FY2025; up 2 since FY2022.
12	Environmental Restoration LLC Top agencies EPA (Environmental Protection Agency)	$37,029,909	1.2%	Rank history: #23 in FY2021, #6 in FY2022, #32 in FY2024 and #24 in FY2025; down 6 since FY2022.
13	AECOM Arcadis Pfas JV Top agencies Army (Department of the Army)	$36,446,227	1.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
14	Environmental Chemical Corporation 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) GSA (General Services Administration)	$31,592,619	1.1%	Rank history: #13 in FY2021, #19 in FY2022, #16 in FY2024 and #20 in FY2025; up 5 since FY2022.
15	Cape Remediation, LLC Top agencies EPA (Environmental Protection Agency)	$30,497,500	1.0%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2024 and #48 in FY2025; new.
16	Fpm-Aecom JV1 Top agencies USAF (Department of the Air Force) DOE (Department of Energy) Army (Department of the Army)	$26,787,989	0.9%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2024 and #81 in FY2025; new.
17	Northwind-Jacobs Joint Venture Top agencies Army (Department of the Army)	$25,396,678	0.8%	Rank history: not on the FY2021 list, #80 in FY2022, #54 in FY2024 and not on the FY2025 list; up 63 since FY2022.
18	Jacobs Government Services Company Top agencies Army (Department of the Army)	$23,114,189	0.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
19	Tetra Tech, Inc. 14 awardees, including Tetra TECH EC, Inc. and Ard, Inc. Top agencies Army (Department of the Army) USAID (US Agency for International Development) DOE (Department of Energy)	$22,735,380	0.8%	Rank history: #15 in FY2021, #17 in FY2022, #19 in FY2024 and #18 in FY2025; down 2 since FY2022.
20	Four Rivers Nuclear Partnership LLC Top agencies DOE (Department of Energy)	$21,683,615	0.7%	Rank history: #36 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; up 13 since FY2022.
21	Bay West LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$19,518,403	0.6%	Rank history: #47 in FY2021, #53 in FY2022, #22 in FY2024 and #19 in FY2025; up 32 since FY2022.
22	Paragon Professional Services LLC Top agencies DOE (Department of Energy) Army (Department of the Army)	$19,086,529	0.6%	Rank history: #34 in FY2021, #35 in FY2022, #28 in FY2024 and #16 in FY2025; up 13 since FY2022.
23	Mark Cerrone, Inc. Top agencies Army (Department of the Army)	$17,553,000	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
24	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) DOE (Department of Energy)	$17,029,202	0.6%	Rank history: #27 in FY2021, #18 in FY2022, #20 in FY2024 and #14 in FY2025; down 6 since FY2022.
25	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency) USDA (Department of Agriculture) GSA (General Services Administration)	$16,391,543	0.5%	Rank history: #49 in FY2021, #42 in FY2022, #17 in FY2024 and #27 in FY2025; up 17 since FY2022.
26	Weeks Marine Inc. Top agencies Commerce (Department of Commerce)	$16,249,599	0.5%	Rank history: #3 in FY2021, #28 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
27	Arctic Slope Regional Corporation 2 awardees, including Environmental Quality Management, Inc. Top agencies Army (Department of the Army)	$15,971,082	0.5%	Rank history: not on the FY2021 list, #34 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
28	Brice-Aecom JV1 Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$15,554,451	0.5%	Rank history: #17 in FY2021, #46 in FY2022 and not on the FY2024–FY2025 lists; up 18 since FY2022.
29	Native Hawaiian Community Development Corporation 2 awardees, including GSI North America Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$15,311,924	0.5%	Rank history: not on the FY2021 list, #54 in FY2022, #78 in FY2024 and not on the FY2025 list; up 25 since FY2022.
30	Ahtna-Arcadis 8(A) JV, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$14,510,671	0.5%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2024 and #77 in FY2025; new.
31	Environmental Rail Solutions Inc. Top agencies Army (Department of the Army)	$14,453,363	0.5%	Rank history: not on the FY2021 list, #47 in FY2022, #23 in FY2024 and #32 in FY2025; up 16 since FY2022.
32	Sol Solutions, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$14,220,808	0.5%	Rank history: #22 in FY2021, #27 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
33	Skeo Solutions, Inc. Top agencies EPA (Environmental Protection Agency)	$14,174,969	0.5%	Rank history: #90 in FY2021, #22 in FY2022, #27 in FY2024 and #67 in FY2025; down 11 since FY2022.
34	SES Civil and Environmental LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$13,155,556	0.4%	Rank history: #54 in FY2021, #45 in FY2022 and not on the FY2024–FY2025 lists; up 11 since FY2022.
35	Confederated Salish and Kootenai Tribes 3 awardees, including S&K Mission Support, LLC, S & K Logistics Services LLC and S & K Federal Services LLC Top agencies DOE (Department of Energy)	$12,856,248	0.4%	Rank history: #59 in FY2021, #81 in FY2022, #65 in FY2024 and not on the FY2025 list; up 46 since FY2022.
36	Cape Environmental Management Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$12,635,892	0.4%	Rank history: #11 in FY2021, #12 in FY2022, #29 in FY2024 and #30 in FY2025; down 24 since FY2022.
37	Bhate Zapata, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$11,702,210	0.4%	Rank history: #18 in FY2021, #68 in FY2022, #76 in FY2024 and not on the FY2025 list; up 31 since FY2022.
38	US Ecology, Inc. 3 awardees, including US Ecology Holdings, Inc., National Response Corporation and NRC Gulf Environmental Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$11,068,176	0.4%	Rank history: not on the FY2021 list, #20 in FY2022, #46 in FY2024 and not on the FY2025 list; down 18 since FY2022.
39	Huntington Ingalls Industries, Inc. Through Newport News Nuclear Bwxt-Los Alamos LLC Top agencies DOE (Department of Energy)	$10,931,322	0.4%	Rank history: #51 in FY2021, #39 in FY2022, not on the FY2024 list and #44 in FY2025; unchanged since FY2022.
40	The Solution Foundry, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$10,689,710	0.4%	Rank history: #40 in FY2021, #36 in FY2022, #36 in FY2024 and #28 in FY2025; down 4 since FY2022.
41	Aerostar SES LLC 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$10,679,183	0.4%	Rank history: #38 in FY2021, #69 in FY2022 and not on the FY2024–FY2025 lists; up 28 since FY2022.
42	Nuclear Fuel Services Inc. Top agencies DOE (Department of Energy)	$10,055,105	0.3%	Rank history: #16 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
43	Natives of Kodiak, Incorporated 2 awardees, including Koman Government Solutions LLC and Environmental Assessment Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$9,981,780	0.3%	Rank history: #62 in FY2021, #37 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
44	CDM Smith-Bay West JV, A Joint Venture Top agencies Army (Department of the Army)	$9,170,406	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
45	Ahtna, Incorporated 3 awardees, including Ahtna Global LLC and Ahtna Environmental, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$8,897,605	0.3%	Rank history: #30 in FY2021, #65 in FY2022 and not on the FY2024–FY2025 lists; up 20 since FY2022.
46	Waste Control Specialists LLC Top agencies DOE (Department of Energy)	$8,882,828	0.3%	Rank history: #35 in FY2021, #38 in FY2022 and not on the FY2024–FY2025 lists; down 8 since FY2022.
47	Seres Engineering & Services LLC 4 awardees, including Seres-Arcadis 8(A) JV2 LLC, Seres-Arcadis 8(A) JV, LLC and Seres-Arcadis SB JV2 LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$8,823,267	0.3%	Rank history: #44 in FY2021, #10 in FY2022 and not on the FY2024–FY2025 lists; down 37 since FY2022.
48	Engineering / Remediation Resources Group, Inc. 2 awardees Top agencies Army (Department of the Army)	$8,778,420	0.3%	Rank history: not on the FY2021 list, #59 in FY2022 and not on the FY2024–FY2025 lists; up 11 since FY2022.
49	Weston Solutions Holdings, Inc. 2 awardees, including Weston Solutions Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$8,668,001	0.3%	Rank history: #20 in FY2021, #29 in FY2022, not on the FY2024 list and #92 in FY2025; down 20 since FY2022.
50	Association of Consultants and Engineers Top agencies Navy (Department of the Navy)	$8,584,300	0.3%	Rank history: #80 in FY2021, #96 in FY2022 and not on the FY2024–FY2025 lists; up 46 since FY2022.
51	Industrial Economics Inc. Top agencies Commerce (Department of Commerce) EPA (Environmental Protection Agency) DOI (Department of the Interior)	$7,980,657	0.3%	Rank history: #95 in FY2021, #66 in FY2022, #56 in FY2024 and #74 in FY2025; up 15 since FY2022.
52	Oneida Nation 4 awardees, including Sustainment & Restoration Services, LLC, OCH JV and Oneida Total Integrated Enterprises LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$7,969,993	0.3%	Rank history: #53 in FY2021, #40 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
53	3D Envirologics LLC Top agencies HHS (Department of Health and Human Services)	$7,957,979	0.3%	Rank history: not on the FY2021 list, #76 in FY2022 and not on the FY2024–FY2025 lists; up 23 since FY2022.
54	Talces JV, LLC Top agencies USAF (Department of the Air Force)	$7,872,341	0.3%	Rank history: not on the FY2021–FY2022 lists, #37 in FY2024 and not on the FY2025 list; new.
55	Parsons Corporation Through Parsons Government Services Inc. Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army)	$7,664,725	0.3%	Rank history: not on the FY2021 list, #14 in FY2022, #38 in FY2024 and #29 in FY2025; down 41 since FY2022.
56	Global Science & Technology, LLC Top agencies Commerce (Department of Commerce)	$7,558,094	0.3%	Rank history: not on the FY2021 list, #61 in FY2022, #45 in FY2024 and #42 in FY2025; up 5 since FY2022.
57	Aerostar Environmental and Construction LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$7,535,231	0.3%	Rank history: not on the FY2021 list, #63 in FY2022, #39 in FY2024 and #43 in FY2025; up 6 since FY2022.
58	Marstel-Day, LLC Top agencies Navy (Department of the Navy) DHA (Defense Health Agency)	$7,274,761	0.2%	Rank history: not on the FY2021 list, #93 in FY2022, not on the FY2024 list and #98 in FY2025; up 35 since FY2022.
59	JFL-WCS Partners LLC Through Waste Control Specialists LLC Top agencies DOE (Department of Energy)	$7,020,000	0.2%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2024 and #49 in FY2025; new.
60	Bb&E, Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) DOI (Department of the Interior)	$6,964,802	0.2%	Rank history: #48 in FY2021, #55 in FY2022, #48 in FY2024 and #38 in FY2025; down 5 since FY2022.
61	Genwest Systems Inc. Top agencies Commerce (Department of Commerce)	$6,771,127	0.2%	Rank history: #43 in FY2021, #51 in FY2022, not on the FY2024 list and #75 in FY2025; down 10 since FY2022.
62	Link Technologies Inc. Top agencies DOE (Department of Energy)	$6,718,718	0.2%	Rank history: #60 in FY2021, #62 in FY2022, #52 in FY2024 and #50 in FY2025; unchanged since FY2022.
63	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency) Commerce (Department of Commerce)	$6,331,059	0.2%	Rank history: #37 in FY2021, not on the FY2022 list, #42 in FY2024 and not on the FY2025 list; up 40 since FY2022.
64	Vernadero Group Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$6,322,036	0.2%	Rank history: #66 in FY2021, not on the FY2022 list, #64 in FY2024 and not on the FY2025 list; up 43 since FY2022.
65	GSI Mmrp JV LLC Top agencies Army (Department of the Army)	$6,205,172	0.2%	Rank history: #71 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; down 22 since FY2022.
66	Ardl Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$6,168,569	0.2%	Rank history: #31 in FY2021, not on the FY2022 list, not on the FY2024 list and #93 in FY2025; up 54 since FY2022.
67	Hgl-Aptim Applied Science and Technology JV, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$6,044,022	0.2%	Rank history: #81 in FY2021, #32 in FY2022 and not on the FY2024–FY2025 lists; down 35 since FY2022.
68	Bhate Environmental Associates, Inc. Top agencies USAF (Department of the Air Force)	$5,889,261	0.2%	Rank history: #57 in FY2021, #52 in FY2022, #87 in FY2024 and #68 in FY2025; down 16 since FY2022.
69	Dawson Solutions LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$5,675,517	0.2%	Rank history: not on the FY2021–FY2022 lists, #9 in FY2024 and #85 in FY2025; new.
70	Cti-Tpmc Environmental Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$5,642,129	0.2%	Rank history: #77 in FY2021, #67 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
71	Olgoonik Corporation Through FPM Remediations, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) Army (Department of the Army)	$5,561,985	0.2%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2024 and #23 in FY2025; up 89 since FY2022.
72	Helicopter Express LLC Top agencies USDA (Department of Agriculture)	$5,505,814	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 71 since FY2022.
73	Azura Consulting LLC Top agencies Commerce (Department of Commerce)	$5,476,870	0.2%	Rank history: not on the FY2021 list, #88 in FY2022, #77 in FY2024 and #87 in FY2025; up 15 since FY2022.
74	Seres-Arcadis SB JV, LLC Top agencies Army (Department of the Army)	$5,343,322	0.2%	Rank history: #70 in FY2021, #60 in FY2022, #30 in FY2024 and #60 in FY2025; down 14 since FY2022.
75	Umyuaq Consulting Group, LLC Top agencies Army (Department of the Army)	$5,287,988	0.2%	Rank history: #75 in FY2021, #44 in FY2022, #84 in FY2024 and not on the FY2025 list; down 31 since FY2022.
76	Environmental Research Group LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DHS (Department of Homeland Security)	$5,108,658	0.2%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2024 and not on the FY2025 list; up 231 since FY2022.
77	Arcadis N.V. Through Arcadis U.s., Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$5,028,420	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 148 since FY2022.
78	Ciri Development Corporation 3 awardees, including North Wind Resource Consulting LLC, North Wind Site Services, LLC and North Wind Construction Services, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) USDA (Department of Agriculture)	$4,822,471	0.2%	Rank history: not on the FY2021 list, #5 in FY2022, #94 in FY2024 and not on the FY2025 list; down 73 since FY2022.
79	Tekpro Support Services, LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force)	$4,764,563	0.2%	Rank history: #78 in FY2021, #79 in FY2022, #74 in FY2024 and #63 in FY2025; unchanged since FY2022.
80	Perikin Enterprises LLC Top agencies Army (Department of the Army)	$4,763,199	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #80 in FY2025; up 85 since FY2022.
81	Sundance EA Associates II Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$4,709,555	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 58 since FY2022.
82	Ayuda Arcadis 8A Joint Venture LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$4,654,792	0.2%	Rank history: #33 in FY2021, #73 in FY2022, #51 in FY2024 and #79 in FY2025; down 9 since FY2022.
83	Ea-Bay West Joint Venture LLC Top agencies Army (Department of the Army)	$4,539,548	0.2%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2024 and not on the FY2025 list; up 97 since FY2022.
84	Ndn-Prd JV LLC Top agencies Navy (Department of the Navy)	$4,537,727	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
85	Ohana Environmental and Construction-Cabrera Remediation and Construction Ocrc 8A JV LLC Top agencies Army (Department of the Army)	$4,495,682	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
86	J.f. Brennan Company, Inc. Top agencies EPA (Environmental Protection Agency)	$4,461,526	0.1%	Rank history: not on the FY2021 list, #3 in FY2022 and not on the FY2024–FY2025 lists; down 83 since FY2022.
87	Tepa, LLC 4 awardees, including Tehama ECS LLC, Tepa EC, LLC and Tehama, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USDA (Department of Agriculture)	$4,307,798	0.1%	Rank history: #65 in FY2021, #91 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
88	Noblis, Inc. Top agencies USAF (Department of the Air Force)	$4,306,128	0.1%	Rank history: not on the FY2021 list, #86 in FY2022, not on the FY2024 list and #72 in FY2025; down 2 since FY2022.
89	Bristol Bay Native Corporation 3 awardees, including Bristol Environmental Solutions LLC and Specpro Professional Services, LLC Top agencies Army (Department of the Army)	$4,283,060	0.1%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2024 and not on the FY2025 list; up 143 since FY2022.
90	ABT Global LLC 2 awardees Top agencies EPA (Environmental Protection Agency) Commerce (Department of Commerce)	$4,162,754	0.1%	Rank history: #82 in FY2021, #95 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
91	PG Environmental, LLC Top agencies DOI (Department of the Interior)	$4,085,712	0.1%	Rank history: #79 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 19 since FY2022.
92	Verina Consulting Group LLC Top agencies Army (Department of the Army)	$4,050,612	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #40 in FY2025; up 71 since FY2022.
93	Cook Inlet Region Inc. 4 awardees, including North Wind Portage, Inc. and North Wind Site Services LLC Top agencies DOE (Department of Energy) Army (Department of the Army)	$3,998,132	0.1%	Rank history: #5 in FY2021, #9 in FY2022 and not on the FY2024–FY2025 lists; down 84 since FY2022.
94	R & K Enterprise Solutions Inc. Top agencies DHS (Department of Homeland Security)	$3,965,314	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
95	Bluestone Interspec JV, LLC Top agencies Navy (Department of the Navy)	$3,936,438	0.1%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2024 and #55 in FY2025; up 38 since FY2022.
96	Cherokee Nation 2 awardees, including Cherokee Federal Solutions, L.L.C. and Cherokee Nation Management & Consulting, L.l.c.. Top agencies Army (Department of the Army) Navy (Department of the Navy) USDA (Department of Agriculture)	$3,890,077	0.1%	Rank history: #68 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 6 since FY2022.
97	The Aleut Corporation 2 awardees, including Aleut Remediation LLC and Aleut Services, LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) Navy (Department of the Navy)	$3,866,167	0.1%	Rank history: #58 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 15 since FY2022.
98	Solv LLC Top agencies Commerce (Department of Commerce) DHS (Department of Homeland Security)	$3,803,225	0.1%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2024 and not on the FY2025 list; up 91 since FY2022.
99	Moran Environmental Recovery, LLC Top agencies Navy (Department of the Navy)	$3,676,299	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 70 since FY2022.
100	On Assignment, Inc. Through ECS Federal, LLC Top agencies Commerce (Department of Commerce)	$3,656,027	0.1%	Rank history: #74 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.

Show 75 more

100 of 743 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	$2,643,600,790	United Cleanup Oak Ridge LLC

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 $3.01 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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 FY2023?

1. United Cleanup Oak Ridge LLC ($753M), 2. EA Engineering, Science, and Technology, Inc., PBC ($126M), 3. BWX Technologies, Inc. ($111M), 4. Jacobs Engineering Group Inc. ($110M), 5. Aptim Federal Services LLC ($101M), 6. Hanford Laboratory Management and Integration LLC ($85.5M), 7. Hydrogeologic, Inc. ($68.6M), 8. Aptim-Amentum Alaska Decommissioning LLC ($65.3M), 9. Sevenson Environmental Services, Inc. ($46.6M), 10. Brice Engineering, LLC ($37.8M).

On GovTribe

Research every contractor on this list

Every contract, task order and IDV they hold
Their subsidiaries, teammates and competitors
Open opportunities they're positioned for
Alerts when they win new work

Try for free Login