Top 100 Contractors in PSC F1: Environmental Systems Protection, FY2024

Name: Top 100 Contractors in PSC F1: Environmental Systems Protection, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 52% of FY2024 PSC F1 contract dollars

Contract obligations: $3,396,546,538 Net of deobligations, by contracts coded PSC F1 or a code under it
Contractors: 1,306 Parent companies with an obligation
Largest contractor: Bechtel Corp $546 million, 15.1% 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 3 awardees, including Bechtel National, Inc. and Bechtel Parsons Blue Grass, A Joint Venture Top agencies Army (Department of the Army)	$545,815,024	15.1%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #2 in FY2025; unchanged since FY2023.
2	Bechtel Parsons Blue Grass, A Joint Venture Top agencies Army (Department of the Army)	$354,772,551	9.8%	Rank history: not on the FY2021–FY2023 lists and #1 in FY2025; new.
3	Sevenson Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$332,042,034	9.2%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2023 and #3 in FY2025; up 24 since FY2023.
4	EA Engineering Science and Technology Inc. PBC 2 awardees Top agencies EPA (Environmental Protection Agency) Navy (Department of the Navy) Army (Department of the Army)	$168,545,920	4.7%	Rank history: #7 in FY2021, #2 in FY2022, #5 in FY2023 and #8 in FY2025; up 1 since FY2023.
5	Hydrogeologic, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$105,162,772	2.9%	Rank history: #2 in FY2021, #4 in FY2022, #4 in FY2023 and #10 in FY2025; down 1 since FY2023.
6	Kemron Environmental Services Inc. 2 awardees, including Kemron / Arrowhead JV, LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$92,368,627	2.6%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2025; up 267 since FY2023.
7	North Wind Portage, Inc. Top agencies Army (Department of the Army) DOE (Department of Energy)	$83,315,088	2.3%	Rank history: not on the FY2021 list, #7 in FY2022, #50 in FY2023 and #6 in FY2025; up 43 since FY2023.
8	AECOM Technical Services, Inc. Top agencies EPA (Environmental Protection Agency) Navy (Department of the Navy) DOI (Department of the Interior)	$74,159,987	2.1%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2025; new.
9	Leisnoi Diversified-Kemron 8A JV, LLC Top agencies EPA (Environmental Protection Agency)	$66,083,081	1.8%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 309 since FY2023.
10	Amentum Technology, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$63,983,972	1.8%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2025; new.
11	Environmental Restoration LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) DOJ (Department of Justice)	$58,717,608	1.6%	Rank history: #3 in FY2021, #3 in FY2022, #8 in FY2023 and #5 in FY2025; down 3 since FY2023.
12	Tetra Tech, Inc. 8 awardees, including Tetra TECH EC, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) USAF (Department of the Air Force)	$55,311,613	1.5%	Rank history: #13 in FY2021, #15 in FY2022, #23 in FY2023 and #9 in FY2025; up 11 since FY2023.
13	Cook Inlet Region Inc. 6 awardees, including North Wind Portage, Inc., North Wind-Ea JV, LLC and North Wind Construction Services, LLC Top agencies DOE (Department of Energy) Army (Department of the Army) DOI (Department of the Interior)	$48,057,423	1.3%	Rank history: #5 in FY2021, #13 in FY2022, #9 in FY2023 and not on the FY2025 list; down 4 since FY2023.
14	Jacobs Engineering Group Inc. 3 awardees, including Amentum Technology, Inc., Ch2M Hill, Inc. and Jacobs Government Services Company Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$39,513,209	1.1%	Rank history: #6 in FY2021, #17 in FY2022, #2 in FY2023 and not on the FY2025 list; down 12 since FY2023.
15	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$37,168,926	1.0%	Rank history: #33 in FY2021, #29 in FY2022, #26 in FY2023 and #26 in FY2025; up 11 since FY2023.
16	EQ & CH Remediation Top agencies EPA (Environmental Protection Agency)	$32,786,469	0.9%	Rank history: #25 in FY2021, #72 in FY2022, #35 in FY2023 and not on the FY2025 list; up 19 since FY2023.
17	Hgl-Aptim JV LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$32,486,789	0.9%	Rank history: #45 in FY2021, #18 in FY2022, #38 in FY2023 and #21 in FY2025; up 21 since FY2023.
18	Inmar Clearing Inc. Through Inmar RX Solutions Inc. Top agencies HHS (Department of Health and Human Services)	$29,999,980	0.8%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2023 and not on the FY2025 list; up 1 since FY2023.
19	C M C, Inc. Top agencies EPA (Environmental Protection Agency)	$29,861,520	0.8%	Rank history: #27 in FY2021, #12 in FY2022, #13 in FY2023 and #60 in FY2025; down 6 since FY2023.
20	CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior)	$26,713,613	0.7%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2023 and #15 in FY2025; up 34 since FY2023.
21	J.f. Brennan Company, Inc. Top agencies EPA (Environmental Protection Agency)	$26,699,920	0.7%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2025; new.
22	Environmental Quality Management, Inc. Top agencies EPA (Environmental Protection Agency)	$26,304,277	0.7%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
23	Weston Solutions Holdings, Inc. Through Weston Solutions Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$24,693,965	0.7%	Rank history: #74 in FY2021, #36 in FY2022, #49 in FY2023 and #44 in FY2025; up 26 since FY2023.
24	Environmental Chemical Corporation 3 awardees, including ECC Environmental LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$24,343,039	0.7%	Rank history: not on the FY2021–FY2022 lists, #52 in FY2023 and #38 in FY2025; up 28 since FY2023.
25	Dawson Solutions LLC Top agencies Army (Department of the Army)	$23,523,162	0.7%	Rank history: not on the FY2021–FY2023 lists and #86 in FY2025; up 166 since FY2023.
26	Conti Federal Services, LLC Top agencies EPA (Environmental Protection Agency)	$22,294,958	0.6%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2025; new.
27	OCH JV Top agencies EPA (Environmental Protection Agency)	$21,591,132	0.6%	Rank history: #66 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
28	Arctic Slope Regional Corporation 2 awardees, including Environmental Quality Management, Inc. and EQM Services, LLC Top agencies EPA (Environmental Protection Agency)	$19,665,055	0.5%	Rank history: #9 in FY2021, #32 in FY2022, #6 in FY2023 and #4 in FY2025; down 22 since FY2023.
29	ECC Environmental LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$18,965,228	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
30	Nobis Engineering, Inc. Top agencies EPA (Environmental Protection Agency)	$18,940,885	0.5%	Rank history: #47 in FY2021, #30 in FY2022, not on the FY2023 list and not on the FY2025 list; up 82 since FY2023.
31	Paragon Professional Services LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$18,847,377	0.5%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023 and #24 in FY2025; up 3 since FY2023.
32	Couvillion Group LLC Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior)	$17,560,000	0.5%	Rank history: #22 in FY2021, #19 in FY2022, #22 in FY2023 and #18 in FY2025; down 10 since FY2023.
33	Ch2M Hill, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$16,652,208	0.5%	Rank history: #85 in FY2021, #21 in FY2022, not on the FY2023 list and #41 in FY2025; up 85 since FY2023.
34	Brice Solutions, LLC Top agencies DOT (Department of Transportation)	$14,579,570	0.4%	Rank history: not on the FY2021 list, #69 in FY2022, #37 in FY2023 and #83 in FY2025; up 3 since FY2023.
35	Promethean Operating I LLC Top agencies DOI (Department of the Interior)	$14,436,658	0.4%	Rank history: not on the FY2021–FY2023 lists and #35 in FY2025; new.
36	Navarro Research and Engineering, Inc. Top agencies Army (Department of the Army)	$14,420,803	0.4%	Rank history: #36 in FY2021, #34 in FY2022, #51 in FY2023 and #47 in FY2025; up 15 since FY2023.
37	Enviro-Fix Solutions LLC Top agencies Army (Department of the Army)	$14,048,833	0.4%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2023 and #34 in FY2025; up 2 since FY2023.
38	Ahtna-Arcadis 8(A) JV, LLC Top agencies Army (Department of the Army)	$13,976,485	0.4%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2023 and #62 in FY2025; up 49 since FY2023.
39	Fpm-Aecom JV1 2 awardees, including Fpm-Aecom JV2 Top agencies Army (Department of the Army)	$13,532,263	0.4%	Rank history: not on the FY2021 list, #33 in FY2022, #24 in FY2023 and #58 in FY2025; down 15 since FY2023.
40	Weston-Techlaw JV LLC Top agencies EPA (Environmental Protection Agency)	$13,298,219	0.4%	Rank history: not on the FY2021 list, #49 in FY2022, #31 in FY2023 and #43 in FY2025; down 9 since FY2023.
41	Sustainment & Restoration Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$13,087,801	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
42	Oneida Nation 2 awardees, including Sustainment & Restoration Services, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$12,915,759	0.4%	Rank history: #16 in FY2021, #9 in FY2022, #12 in FY2023 and not on the FY2025 list; down 30 since FY2023.
43	Engineering/Remediation Resources Group Inc. 2 awardees Top agencies DOI (Department of the Interior) USDA (Department of Agriculture) Navy (Department of the Navy)	$12,320,919	0.3%	Rank history: #92 in FY2021, #42 in FY2022, not on the FY2023 list and #72 in FY2025; up 73 since FY2023.
44	EQM Services, LLC Top agencies EPA (Environmental Protection Agency)	$11,666,554	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
45	Guidehouse Inc. Through Aptim Federal Services, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$11,665,095	0.3%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2025; new.
46	Jacobs Government Services Company 4 awardees, including Jacobs Engineering Group Inc., Jacobs Usae Joint Venture and Ch2M Hill Constructors, Inc. Top agencies EPA (Environmental Protection Agency) DECA (Defense Commissary Agency) Army (Department of the Army)	$11,570,556	0.3%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023 and #29 in FY2025; up 16 since FY2023.
47	Noreas Environmental Services LLC Top agencies Army (Department of the Army)	$11,353,673	0.3%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2023 and #40 in FY2025; down 1 since FY2023.
48	Techlaw Consultants Inc. Top agencies EPA (Environmental Protection Agency)	$10,695,140	0.3%	Rank history: not on the FY2021–FY2023 lists and #99 in FY2025; new.
49	Brice Engineering, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$10,463,408	0.3%	Rank history: #18 in FY2021, #16 in FY2022, #15 in FY2023 and #28 in FY2025; down 34 since FY2023.
50	Seaon Environmental LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$10,085,104	0.3%	Rank history: #49 in FY2021, #41 in FY2022, #47 in FY2023 and #39 in FY2025; down 3 since FY2023.
51	Pika International Inc. 2 awardees, including Pika-Pirnie JV LLC Top agencies Army (Department of the Army)	$10,069,554	0.3%	Rank history: not on the FY2021–FY2023 lists and #55 in FY2025; up 175 since FY2023.
52	AECOM 4 awardees, including Amentum Environment & Energy, Inc., Environmental Management & Planning Solutions LLC and AECOM Technical Services, Inc. Top agencies DOT (Department of Transportation) DOI (Department of the Interior) EPA (Environmental Protection Agency)	$9,953,108	0.3%	Rank history: #37 in FY2021, #5 in FY2022, #3 in FY2023 and not on the FY2025 list; down 49 since FY2023.
53	Research Triangle Institute Top agencies EPA (Environmental Protection Agency)	$9,687,472	0.3%	Rank history: #84 in FY2021, #43 in FY2022, #33 in FY2023 and #52 in FY2025; down 20 since FY2023.
54	Parsons Government Services Inc. Top agencies MDA (DOD Missile Defense Agency)	$9,285,912	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
55	Global Diving & Salvage, Inc. Top agencies DHS (Department of Homeland Security)	$9,243,446	0.3%	Rank history: #44 in FY2021, #22 in FY2022, not on the FY2023 list and not on the FY2025 list; up 76 since FY2023.
56	A and M Engineering & Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency)	$8,602,459	0.2%	Rank history: #41 in FY2021, #39 in FY2022, not on the FY2023 list and #53 in FY2025; returned.
57	Specpro-Ayuda JV, LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$8,505,428	0.2%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023 and not on the FY2025 list; up 14 since FY2023.
58	CDM Smith Inc Through CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency)	$8,122,716	0.2%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2023 and not on the FY2025 list; down 48 since FY2023.
59	Plexus-Ayuda Joint Venture LLC Top agencies Army (Department of the Army)	$8,058,894	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
60	Triumvirate Environmental, LLC Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce) Army (Department of the Army)	$7,784,625	0.2%	Rank history: #58 in FY2021, #70 in FY2022, #57 in FY2023 and #59 in FY2025; down 3 since FY2023.
61	GSI North America Inc. Top agencies Army (Department of the Army)	$7,769,996	0.2%	Rank history: not on the FY2021–FY2023 lists and #79 in FY2025; new.
62	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$7,754,635	0.2%	Rank history: #20 in FY2021, #56 in FY2022, #29 in FY2023 and not on the FY2025 list; down 33 since FY2023.
63	Environmental Compliance Consultants, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$7,720,417	0.2%	Rank history: #52 in FY2021, #52 in FY2022, #55 in FY2023 and #97 in FY2025; down 8 since FY2023.
64	Ahtna Global LLC 2 awardees Top agencies Army (Department of the Army) DOT (Department of Transportation)	$7,676,810	0.2%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2025; new.
65	Ahtna Solutions, LLC Top agencies DOT (Department of Transportation) Army (Department of the Army)	$7,540,727	0.2%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2023 and #48 in FY2025; down 21 since FY2023.
66	Energysolutions Services, Inc. Top agencies Navy (Department of the Navy)	$6,847,306	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
67	Tanaq-Sundance 8(A) Joint Venture, LLC Top agencies Army (Department of the Army)	$6,800,883	0.2%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2023 and not on the FY2025 list; up 29 since FY2023.
68	RSI Remediation, LLC Top agencies Navy (Department of the Navy)	$6,234,009	0.2%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2023 and not on the FY2025 list; up 20 since FY2023.
69	The Source Group, Inc. Top agencies DLA (Defense Logistics Agency)	$5,999,184	0.2%	Rank history: #43 in FY2021, #25 in FY2022, not on the FY2023 list and #54 in FY2025; up 44 since FY2023.
70	Parsons Corporation Through Parsons Government Services Inc. Top agencies MDA (DOD Missile Defense Agency) Army (Department of the Army)	$5,979,487	0.2%	Rank history: #23 in FY2021, #35 in FY2022, #36 in FY2023 and #32 in FY2025; down 34 since FY2023.
71	Applied Research Associates, Inc. Top agencies DOI (Department of the Interior)	$5,805,776	0.2%	Rank history: #26 in FY2021, #58 in FY2022, #85 in FY2023 and #66 in FY2025; up 14 since FY2023.
72	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) Navy (Department of the Navy)	$5,805,288	0.2%	Rank history: #28 in FY2021, #24 in FY2022, #30 in FY2023 and not on the FY2025 list; down 42 since FY2023.
73	Mantech SRS Technologies, Inc. Top agencies Army (Department of the Army)	$5,786,501	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
74	S C & A Inc. Top agencies DHS (Department of Homeland Security) DOE (Department of Energy) EPA (Environmental Protection Agency)	$5,774,136	0.2%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023 and not on the FY2025 list; down 7 since FY2023.
75	ABT Global LLC Top agencies EPA (Environmental Protection Agency)	$5,524,825	0.2%	Rank history: not on the FY2021–FY2023 lists and #82 in FY2025; new.
76	Leisnoi-Kemron 8A JV, LLC Top agencies EPA (Environmental Protection Agency) Navy (Department of the Navy)	$5,354,742	0.1%	Rank history: #32 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 49 since FY2023.
77	Clean Harbors Inc. 2 awardees, including Clean Harbors Environmental Services Inc. and Clean Harbors Caribe, Inc. Top agencies Treasury (Department of the Treasury) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$5,219,639	0.1%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2025; new.
78	Oneida Total Integrated Enterprises LLC Top agencies DOI (Department of the Interior) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$5,201,877	0.1%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2025; new.
79	Arrowhead Contracting, LLC Top agencies EPA (Environmental Protection Agency)	$5,168,345	0.1%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2023 and #31 in FY2025; down 58 since FY2023.
80	KGS Seres 8A JV LLC Top agencies Army (Department of the Army)	$5,156,436	0.1%	Rank history: #59 in FY2021, #64 in FY2022, #75 in FY2023 and not on the FY2025 list; down 5 since FY2023.
81	Broadbent & Associates, Inc. Top agencies DOI (Department of the Interior)	$4,851,673	0.1%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2025; new.
82	Migo-A&M-Haemers JV Top agencies EPA (Environmental Protection Agency)	$4,816,051	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
83	TDX Power Services LLC Through Bering Sea Eccotech, LLC Top agencies Navy (Department of the Navy)	$4,538,347	0.1%	Rank history: not on the FY2021–FY2023 lists and #84 in FY2025; up 60 since FY2023.
84	Versar-Wsp JV Top agencies EPA (Environmental Protection Agency)	$4,529,536	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 82 since FY2023.
85	Bering-Weston JV, LLC Top agencies USAF (Department of the Air Force)	$4,499,000	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
86	Municipal Base Services LLC Top agencies Army (Department of the Army)	$4,469,741	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
87	Bristol Bay Native Corporation 2 awardees, including Bristol Environmental Solutions LLC Top agencies Army (Department of the Army)	$4,430,312	0.1%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and #27 in FY2025; down 45 since FY2023.
88	Resolve Marine Group Inc. Top agencies DHS (Department of Homeland Security)	$4,425,211	0.1%	Rank history: #39 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 187 since FY2023.
89	BBJ Group LLC Top agencies DOI (Department of the Interior)	$4,294,330	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
90	Calista Corp 2 awardees, including Brice Environmental Services Corporation Top agencies Army (Department of the Army)	$4,272,000	0.1%	Rank history: #60 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 107 since FY2023.
91	Owl Ayuda 8A JV LLC Top agencies EPA (Environmental Protection Agency)	$4,143,432	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 156 since FY2023.
92	Real Model Solutions, Inc. Top agencies USAF (Department of the Air Force)	$4,111,628	0.1%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2025; up 96 since FY2023.
93	HDR Aptim LLC Top agencies EPA (Environmental Protection Agency)	$4,083,596	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
94	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$3,954,395	0.1%	Rank history: not on the FY2021–FY2023 lists and #94 in FY2025; new.
95	Cape Remediation, LLC Top agencies EPA (Environmental Protection Agency)	$3,923,923	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 289 since FY2023.
96	Chet Morrison Contractors LLC Top agencies DOI (Department of the Interior)	$3,856,921	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
97	Heliotech 2 awardees Top agencies EPA (Environmental Protection Agency)	$3,768,241	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
98	Tahkox E2-Whitetail LLC Top agencies Army (Department of the Army)	$3,731,749	0.1%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2025; new.
99	Environmental Assessment Services, LLC Top agencies Army (Department of the Army)	$3,699,377	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
100	C & C Environmental Inc. Top agencies Army (Department of the Army)	$3,685,504	0.1%	Rank history: #67 in FY2021, #82 in FY2022, #90 in FY2023 and #76 in FY2025; down 10 since FY2023.

Show 75 more

100 of 1,306 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC F1

Code	Net obligations	Largest contractor
F108 Hazardous Substance Removal, Cleanup, and Disposal Services and Operational Support	$3,113,262,227	Bechtel Corp
F115 Environmental Systems Protection – Environmental Consulting and Legal Support	$96,053,017	Eastern Research Group Inc.
F112 Oil Spill Response including Cleanup, Removal, Disposal and Operational Support	$57,912,254	Couvillion Group LLC
F103 Water Quality Support Services	$33,598,253	Seaon Environmental LLC
F110 Development of Environmental Impact Statements and Assessments	$24,007,947	Pika International Inc.
F107 Hazardous Substance Analysis	$17,068,608	Tahkox E2-Whitetail LLC
F101 Air Quality Support Services	$15,415,520	Eastern Research Group Inc.
F111 Industrial Investigations, Surveys and Technical Support for Multiple Pollutants	$11,941,062	Straughan Environmental, Inc.
F105 Pesticides Support Services	$10,198,119	Crop Jet Aviation, L.L.C.
F114 Environmental Systems Protection – Environmental Licensing and Permitting	$9,121,518	Pacific Commercial Services, Inc.

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 $3.6 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 F1 contractors in FY2024?

1. Bechtel Corp ($546M), 2. Bechtel Parsons Blue Grass, A Joint Venture ($355M), 3. Sevenson Environmental Services, Inc. ($332M), 4. EA Engineering Science and Technology Inc. PBC ($169M), 5. Hydrogeologic, Inc. ($105M), 6. Kemron Environmental Services Inc. ($92.4M), 7. North Wind Portage, Inc. ($83.3M), 8. AECOM Technical Services, Inc. ($74.2M), 9. Leisnoi Diversified-Kemron 8A JV, LLC ($66.1M), 10. Amentum Technology, Inc. ($64M).

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