Top 100 Contractors in PSC F108: Hazardous Substance Removal, Cleanup, and Disposal Services and Operational Support, FY2023

Name: Top 100 Contractors in PSC F108: Hazardous Substance Removal, Cleanup, and Disposal Services and Operational Support, FY2023
Creator: GovTribe

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

The top 10 won 58% of FY2023 PSC F108 contract dollars

Contract obligations: $2,664,061,296 Net of deobligations, by contracts coded PSC F108
Contractors: 681 Parent companies with an obligation
Largest contractor: Bechtel Corp $836 million, 30.4% 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	Bechtel Corp 2 awardees, including Bechtel Parsons Blue Grass, A Joint Venture and Bechtel National, Inc. Top agencies Army (Department of the Army)	$836,266,723	30.4%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2024 and #2 in FY2025; unchanged since FY2022.
2	Jacobs Engineering Group Inc. 5 awardees, including Amentum Technology, Inc., Ch2M Hill, Inc. and Ch2M Hill Constructors, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$129,041,415	4.7%	Rank history: #6 in FY2021, #15 in FY2022, #14 in FY2024 and not on the FY2025 list; up 13 since FY2022.
3	AECOM 4 awardees, including AECOM Technical Services, Inc., Amentum Environment & Energy, Inc. and Aecom-Atkins Joint Venture Top agencies EPA (Environmental Protection Agency) DOT (Department of Transportation) Army (Department of the Army)	$109,781,526	4.0%	Rank history: #33 in FY2021, #5 in FY2022, #46 in FY2024 and not on the FY2025 list; up 2 since FY2022.
4	Hydrogeologic, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$108,513,467	3.9%	Rank history: #2 in FY2021, #4 in FY2022, #5 in FY2024 and #9 in FY2025; unchanged since FY2022.
5	EA Engineering, Science, and Technology, Inc., PBC Top agencies EPA (Environmental Protection Agency) Navy (Department of the Navy) Army (Department of the Army)	$92,013,235	3.3%	Rank history: #7 in FY2021, #2 in FY2022, #4 in FY2024 and #8 in FY2025; down 3 since FY2022.
6	Arctic Slope Regional Corporation 2 awardees, including Environmental Quality Management, Inc. and EQM Services, LLC Top agencies EPA (Environmental Protection Agency) USAF (Department of the Air Force) DOI (Department of the Interior)	$73,815,725	2.7%	Rank history: #9 in FY2021, #27 in FY2022, #27 in FY2024 and #4 in FY2025; up 21 since FY2022.
7	Nelson Environmental Remediation USA Ltd Top agencies USAID (US Agency for International Development)	$71,013,106	2.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
8	Environmental Restoration LLC Top agencies EPA (Environmental Protection Agency) DOJ (Department of Justice)	$64,663,190	2.4%	Rank history: #3 in FY2021, #3 in FY2022, #11 in FY2024 and #5 in FY2025; down 5 since FY2022.
9	Cook Inlet Region Inc. 3 awardees, including North Wind Portage, Inc. and North Wind Site Services LLC Top agencies DOE (Department of Energy) Army (Department of the Army)	$54,444,066	2.0%	Rank history: #5 in FY2021, #12 in FY2022, #13 in FY2024 and not on the FY2025 list; up 3 since FY2022.
10	Aptim AECOM Decommissioning, LLC Top agencies Army (Department of the Army)	$48,732,607	1.8%	Rank history: #8 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 179 since FY2022.
11	CDM Smith Inc Through CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency)	$46,013,583	1.7%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2024 and not on the FY2025 list; new.
12	C M C, Inc. Top agencies EPA (Environmental Protection Agency)	$42,663,299	1.6%	Rank history: #23 in FY2021, #11 in FY2022, #18 in FY2024 and #52 in FY2025; down 1 since FY2022.
13	Oneida Nation 3 awardees, including Sustainment & Restoration Services, LLC, OCH JV and Oneida Total Integrated Enterprises LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$42,653,777	1.6%	Rank history: #14 in FY2021, #10 in FY2022, #38 in FY2024 and not on the FY2025 list; down 3 since FY2022.
14	Kemron / Arrowhead JV, LLC Top agencies EPA (Environmental Protection Agency)	$39,785,837	1.4%	Rank history: #35 in FY2021, #17 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
15	Brice Engineering, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$33,881,429	1.2%	Rank history: #21 in FY2021, #20 in FY2022, #59 in FY2024 and #28 in FY2025; up 5 since FY2022.
16	Amentum Services, Inc. Top agencies Army (Department of the Army)	$31,601,841	1.1%	Rank history: #34 in FY2021, #6 in FY2022 and not on the FY2024–FY2025 lists; down 10 since FY2022.
17	Aptim Federal Services LLC 2 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy)	$30,411,230	1.1%	Rank history: #27 in FY2021, #9 in FY2022 and not on the FY2024–FY2025 lists; down 8 since FY2022.
18	Veterans Holding Group LLC Through Relyant Global LLC Top agencies Army (Department of the Army)	$29,776,456	1.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
19	Inmar Clearing Inc. Through Inmar RX Solutions Inc. Top agencies HHS (Department of Health and Human Services)	$29,565,120	1.1%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2024 and not on the FY2025 list; new.
20	Pika-Insight JV LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$26,017,594	0.9%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2024 and not on the FY2025 list; up 132 since FY2022.
21	Arrowhead Contracting, LLC Top agencies EPA (Environmental Protection Agency)	$25,843,246	0.9%	Rank history: not on the FY2021–FY2022 lists, #66 in FY2024 and #26 in FY2025; up 439 since FY2022.
22	Fpm-Aecom JV1 Top agencies Army (Department of the Army)	$25,226,264	0.9%	Rank history: not on the FY2021 list, #28 in FY2022, #37 in FY2024 and #50 in FY2025; up 6 since FY2022.
23	Kemron Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$25,024,543	0.9%	Rank history: #10 in FY2021, #13 in FY2022 and not on the FY2024–FY2025 lists; down 10 since FY2022.
24	Tetra Tech, Inc. 7 awardees, including Tetra TECH EC, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$24,502,068	0.9%	Rank history: #13 in FY2021, #14 in FY2022, #12 in FY2024 and #13 in FY2025; down 10 since FY2022.
25	Sevenson Environmental Services, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$22,159,160	0.8%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2024 and #3 in FY2025; new.
26	Asrc Consulting & Environmental Services LLC Top agencies DOI (Department of the Interior)	$19,447,132	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
27	Hdr, Inc. 3 awardees, including HDR Aptim LLC and HDR Environmental, Operations and Construction, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$15,356,670	0.6%	Rank history: #32 in FY2021, #22 in FY2022, #63 in FY2024 and #95 in FY2025; down 5 since FY2022.
28	A and M Engineering & Environmental Services Inc Top agencies EPA (Environmental Protection Agency)	$13,920,364	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
29	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. and Leidos-Cdm Solutions LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$13,524,644	0.5%	Rank history: #29 in FY2021, #45 in FY2022, #51 in FY2024 and #87 in FY2025; up 16 since FY2022.
30	Paragon Professional Services LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$12,972,469	0.5%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2024 and #22 in FY2025; up 245 since FY2022.
31	EQ & CH Remediation Top agencies EPA (Environmental Protection Agency)	$12,831,525	0.5%	Rank history: #22 in FY2021, not on the FY2022 list, #15 in FY2024 and not on the FY2025 list; up 282 since FY2022.
32	Enviro-Fix Solutions LLC Top agencies Army (Department of the Army)	$11,984,342	0.4%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2024 and #30 in FY2025; new.
33	Energysolutions LLC 2 awardees, including Energysolutions Services, Inc. Top agencies Navy (Department of the Navy)	$11,250,828	0.4%	Rank history: #28 in FY2021, #25 in FY2022 and not on the FY2024–FY2025 lists; down 8 since FY2022.
34	Parsons Corporation Through Parsons Government Services Inc. Top agencies MDA (DOD Missile Defense Agency) Army (Department of the Army)	$10,944,808	0.4%	Rank history: #20 in FY2021, #30 in FY2022, #61 in FY2024 and #29 in FY2025; down 4 since FY2022.
35	Noreas Aptim Environmental Remediation JV Top agencies EPA (Environmental Protection Agency) Navy (Department of the Navy)	$10,730,026	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 102 since FY2022.
36	Bristol Bay Native Corporation Through Bristol Environmental Solutions LLC Top agencies Army (Department of the Army)	$10,658,464	0.4%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2024 and #24 in FY2025; new.
37	Hgl-Aptim JV LLC Top agencies Army (Department of the Army)	$10,570,119	0.4%	Rank history: not on the FY2021 list, #18 in FY2022, #16 in FY2024 and #20 in FY2025; down 19 since FY2022.
38	ST George Tanaq Corp 2 awardees, including Tanaq Environmental LLC and Heliotech Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) Navy (Department of the Navy)	$10,493,369	0.4%	Rank history: #68 in FY2021, #40 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
39	Ahtna Solutions, LLC Top agencies Army (Department of the Army) DOT (Department of Transportation) Commerce (Department of Commerce)	$10,200,793	0.4%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2024 and #43 in FY2025; new.
40	Noreas Environmental Services LLC Top agencies Army (Department of the Army)	$9,769,313	0.4%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2024 and #35 in FY2025; new.
41	Ahtna, Incorporated 3 awardees, including Ahtna Global LLC, Ahtna Engineering Services, LLC and Ahtna Environmental, Inc. Top agencies Army (Department of the Army)	$9,598,625	0.3%	Rank history: #26 in FY2021, #73 in FY2022 and not on the FY2024–FY2025 lists; up 32 since FY2022.
42	CTL Environmental LLC Top agencies Army (Department of the Army)	$9,394,818	0.3%	Rank history: #81 in FY2021, #97 in FY2022 and not on the FY2024–FY2025 lists; up 55 since FY2022.
43	Weston Solutions Holdings, Inc. Through Weston Solutions Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$9,114,634	0.3%	Rank history: #58 in FY2021, #31 in FY2022, #21 in FY2024 and #38 in FY2025; down 12 since FY2022.
44	North Wind Portage, Inc. Top agencies DOE (Department of Energy)	$9,076,079	0.3%	Rank history: not on the FY2021 list, #7 in FY2022, #7 in FY2024 and #6 in FY2025; down 37 since FY2022.
45	Environmental Chemical Corporation 3 awardees, including ECC Environmental LLC Top agencies Army (Department of the Army) MDA (DOD Missile Defense Agency)	$9,005,948	0.3%	Rank history: #86 in FY2021, not on the FY2022 list, #23 in FY2024 and #34 in FY2025; up 125 since FY2022.
46	Navarro Research and Engineering, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$8,801,605	0.3%	Rank history: #31 in FY2021, #29 in FY2022, #34 in FY2024 and #42 in FY2025; down 17 since FY2022.
47	CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency)	$7,512,709	0.3%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2024 and #16 in FY2025; up 141 since FY2022.
48	Environmental Compliance Consultants, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$7,297,985	0.3%	Rank history: #43 in FY2021, #42 in FY2022, #54 in FY2024 and #76 in FY2025; down 6 since FY2022.
49	Seres-Arcadis SB JV, LLC Top agencies Army (Department of the Army)	$6,766,760	0.2%	Rank history: #76 in FY2021, #98 in FY2022 and not on the FY2024–FY2025 lists; up 49 since FY2022.
50	Triumvirate Environmental, LLC Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce) Army (Department of the Army)	$6,650,626	0.2%	Rank history: #48 in FY2021, #55 in FY2022, #53 in FY2024 and #51 in FY2025; up 5 since FY2022.
51	Splut Inc. Top agencies Army (Department of the Army)	$6,531,000	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
52	Jacobs Government Services Company 2 awardees, including Ch2M Hill Constructors, Inc. Top agencies Army (Department of the Army)	$6,428,056	0.2%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2024 and #25 in FY2025; new.
53	Mission Support Services LLC Through Oneida Total Integrated Enterprises LLC Top agencies USAF (Department of the Air Force)	$6,263,552	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
54	Natives of Kodiak, Incorporated 2 awardees, including Environmental Assessment Services, LLC and Koman Government Solutions LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$6,100,470	0.2%	Rank history: #64 in FY2021, #53 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
55	Versar-Envirocon JV Top agencies EPA (Environmental Protection Agency)	$6,096,418	0.2%	Rank history: not on the FY2021 list, #74 in FY2022 and not on the FY2024–FY2025 lists; up 19 since FY2022.
56	Sevenson-Usa Environmental Joint Venture Top agencies Army (Department of the Army)	$5,961,879	0.2%	Rank history: #18 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; down 13 since FY2022.
57	Cabrera Services Inc. Top agencies Army (Department of the Army)	$5,934,112	0.2%	Rank history: #17 in FY2021, #8 in FY2022 and not on the FY2024–FY2025 lists; down 49 since FY2022.
58	The Aleut Corporation 2 awardees, including Aleut Remediation LLC Top agencies Army (Department of the Army)	$5,876,869	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 117 since FY2022.
59	AGN JV LLC Top agencies Army (Department of the Army)	$5,848,240	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #72 in FY2025; new.
60	Specpro-Ayuda JV, LLC Top agencies EPA (Environmental Protection Agency)	$5,248,028	0.2%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2024 and not on the FY2025 list; new.
61	Advanced Chemical Transport LLC Top agencies DOI (Department of the Interior) DOJ (Department of Justice)	$5,140,620	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 404 since FY2022.
62	KGS Seres 8A JV LLC Top agencies Army (Department of the Army)	$5,003,280	0.2%	Rank history: #47 in FY2021, #47 in FY2022, #67 in FY2024 and #86 in FY2025; down 15 since FY2022.
63	Brice Aptim JV LLC Top agencies DLA (Defense Logistics Agency)	$4,966,509	0.2%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2024 and not on the FY2025 list; new.
64	HGS Engineering Inc. Top agencies Navy (Department of the Navy)	$4,921,890	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
65	Paragon Central JV, LLC Top agencies Army (Department of the Army)	$4,886,035	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
66	Otie-Pwt JV, LLC Top agencies EPA (Environmental Protection Agency)	$4,800,193	0.2%	Rank history: not on the FY2021 list, #49 in FY2022 and not on the FY2024–FY2025 lists; down 17 since FY2022.
67	Clean Harbors Inc 4 awardees, including Clean Harbors Environmental Services Inc., Safety-Kleen Systems, Inc. and Clean Harbors Caribe, Inc. Top agencies Treasury (Department of the Treasury) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$4,684,818	0.2%	Rank history: #83 in FY2021, #56 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
68	Arcadis N.V. Through Arcadis U.s., Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) Army (Department of the Army)	$4,659,349	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
69	Better By Design LLC Top agencies EPA (Environmental Protection Agency)	$4,613,576	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
70	Ciri Development Corporation 5 awardees, including North Wind-Ea JV, LLC, North Wind Site Services, LLC and North Wind Construction Services, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) DOE (Department of Energy)	$4,601,286	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 274 since FY2022.
71	USA Environmental, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$4,507,913	0.2%	Rank history: not on the FY2021 list, #51 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
72	Ahtna-Arcadis 8(A) JV, LLC Top agencies Army (Department of the Army)	$4,448,977	0.2%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2024 and #54 in FY2025; new.
73	RSI Remediation, LLC Top agencies Navy (Department of the Navy)	$4,246,868	0.2%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2024 and not on the FY2025 list; new.
74	C & C Environmental Inc. Top agencies Army (Department of the Army)	$4,096,454	0.1%	Rank history: #56 in FY2021, #61 in FY2022, #87 in FY2024 and #63 in FY2025; down 13 since FY2022.
75	North Wind-Cdm Advantage JV, LLC Top agencies Army (Department of the Army)	$3,956,663	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
76	Techlaw, Inc. Through Techlaw Consultants Inc. Top agencies EPA (Environmental Protection Agency)	$3,954,876	0.1%	Rank history: #63 in FY2021, #67 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
77	Tanaq-Sundance 8(A) Joint Venture, LLC Top agencies Army (Department of the Army)	$3,723,737	0.1%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2024 and #85 in FY2025; up 33 since FY2022.
78	Municipal Base Services LLC Top agencies Army (Department of the Army)	$3,722,894	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
79	Applied Technology, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$3,671,373	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 53 since FY2022.
80	Tepa, LLC 3 awardees, including Tehama, LLC and Tehama ECS LLC Top agencies DOI (Department of the Interior) Army (Department of the Army) USDA (Department of Agriculture)	$3,659,021	0.1%	Rank history: not on the FY2021 list, #65 in FY2022 and not on the FY2024–FY2025 lists; down 15 since FY2022.
81	Tanaq-Mes 8(A) JV, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$3,558,712	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
82	NV Services LLC Top agencies DHS (Department of Homeland Security)	$3,370,484	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	Ohana Environmental and Construction-Cabrera Remediation and Construction Ocrc 8A JV LLC Top agencies Army (Department of the Army)	$3,361,056	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
84	Paragon-Jacobs Joint Venture, LLC Top agencies Army (Department of the Army)	$3,299,635	0.1%	Rank history: #44 in FY2021, #34 in FY2022, not on the FY2024 list and #77 in FY2025; down 50 since FY2022.
85	Aerostar Environmental and Construction LLC Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$3,285,134	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #32 in FY2025; up 39 since FY2022.
86	Iveco SUD-West Nutzfahrzeuge GMBH 2 awardees, including Ati, Inc. and Atesi Services, LLC Top agencies DOI (Department of the Interior) DHS (Department of Homeland Security) DOJ (Department of Justice)	$3,198,280	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
87	Nobis Engineering, Inc. Top agencies EPA (Environmental Protection Agency)	$3,130,920	0.1%	Rank history: #38 in FY2021, #24 in FY2022, #30 in FY2024 and #93 in FY2025; down 63 since FY2022.
88	LOS Alamos Technical Associates, Inc. Top agencies USAF (Department of the Air Force)	$3,050,566	0.1%	Rank history: #92 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 33 since FY2022.
89	RSI Services LLC Top agencies Army (Department of the Army) DOE (Department of Energy)	$2,939,336	0.1%	Rank history: #89 in FY2021, #71 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
90	Ch2M Hill, Inc. Top agencies EPA (Environmental Protection Agency)	$2,932,647	0.1%	Rank history: #69 in FY2021, #19 in FY2022, #31 in FY2024 and #36 in FY2025; down 71 since FY2022.
91	Versar-Arcadis A Joint Venture Top agencies Army (Department of the Army)	$2,922,047	0.1%	Rank history: #79 in FY2021, #36 in FY2022 and not on the FY2024–FY2025 lists; down 55 since FY2022.
92	Inspection Experts Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$2,912,637	0.1%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2024 and #58 in FY2025; up 55 since FY2022.
93	Insurcomm, Inc. Top agencies VA (Department of Veterans Affairs)	$2,840,689	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 131 since FY2022.
94	Olgoonik Corporation Through FPM Remediations, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) USDA (Department of Agriculture)	$2,688,768	0.1%	Rank history: #40 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 144 since FY2022.
95	US Ecology, Inc. 4 awardees, including NRC Environmental Services Inc. and US Ecology Washington Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$2,588,135	0.1%	Rank history: #85 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 30 since FY2022.
96	Leisnoi-Kemron 8A JV, LLC Top agencies Navy (Department of the Navy)	$2,568,588	0.1%	Rank history: #25 in FY2021, not on the FY2022 list, #64 in FY2024 and not on the FY2025 list; returned.
97	Engineering / Remediation Resources Group, Inc. Top agencies Navy (Department of the Navy) USDA (Department of Agriculture) DOT (Department of Transportation)	$2,564,569	0.1%	Rank history: #73 in FY2021, #35 in FY2022, #42 in FY2024 and #73 in FY2025; down 62 since FY2022.
98	Mellor Engineering Inc. Top agencies Army (Department of the Army)	$2,492,808	0.1%	Rank history: not on the FY2021 list, #82 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
99	Petroleum Resources & Development, Inc. Top agencies USAF (Department of the Air Force)	$2,443,859	0.1%	Rank history: not on the FY2021 list, #62 in FY2022, #93 in FY2024 and not on the FY2025 list; down 37 since FY2022.
100	Hana Engineers & Consultants LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$2,409,814	0.1%	Rank history: not on the FY2021 list, #75 in FY2022 and not on the FY2024–FY2025 lists; down 25 since FY2022.

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100 of 681 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 $2.75 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 F108 contractors in FY2023?

1. Bechtel Corp ($836M), 2. Jacobs Engineering Group Inc. ($129M), 3. AECOM ($110M), 4. Hydrogeologic, Inc. ($109M), 5. EA Engineering, Science, and Technology, Inc., PBC ($92M), 6. Arctic Slope Regional Corporation ($73.8M), 7. Nelson Environmental Remediation USA Ltd ($71M), 8. Environmental Restoration LLC ($64.7M), 9. Cook Inlet Region Inc. ($54.4M), 10. Aptim AECOM Decommissioning, LLC ($48.7M).

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