Top 100 Contractors in PSC F1: Environmental Systems Protection, FY2022

Name: Top 100 Contractors in PSC F1: Environmental Systems Protection, FY2022
Creator: GovTribe

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

The top 10 won 54% of FY2022 PSC F1 contract dollars

Contract obligations: $2,217,169,420 Net of deobligations, by contracts coded PSC F1 or a code under it
Contractors: 1,196 Parent companies with an obligation
Largest contractor: Bechtel Corp $786 million, 33.2% 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	Bechtel Corp 2 awardees, including Bechtel National, Inc. and Bechtel Parsons Blue Grass, A Joint Venture Top agencies Army (Department of the Army)	$785,708,753	33.2%	Rank history: #1 in FY2021, #1 in FY2023, #1 in FY2024 and #2 in FY2025; unchanged since FY2021.
2	EA Engineering, Science, and Technology, Inc., PBC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) USAF (Department of the Air Force)	$135,371,286	5.7%	Rank history: #7 in FY2021, #5 in FY2023, #4 in FY2024 and #8 in FY2025; up 5 since FY2021.
3	Environmental Restoration LLC Top agencies EPA (Environmental Protection Agency) DOJ (Department of Justice)	$75,122,196	3.2%	Rank history: #3 in FY2021, #8 in FY2023, #11 in FY2024 and #5 in FY2025; unchanged since FY2021.
4	Hydrogeologic, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$53,486,813	2.3%	Rank history: #2 in FY2021, #4 in FY2023, #5 in FY2024 and #10 in FY2025; down 2 since FY2021.
5	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) DHS (Department of Homeland Security)	$48,724,597	2.1%	Rank history: #37 in FY2021, #3 in FY2023, #52 in FY2024 and not on the FY2025 list; up 32 since FY2021.
6	Amentum Services, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$38,447,529	1.6%	Rank history: #38 in FY2021, #16 in FY2023 and not on the FY2024–FY2025 lists; up 32 since FY2021.
7	North Wind Portage, Inc. Top agencies DOE (Department of Energy)	$34,396,891	1.5%	Rank history: not on the FY2021 list, #50 in FY2023, #7 in FY2024 and #6 in FY2025; new.
8	Cabrera Services Inc. Top agencies Army (Department of the Army)	$33,962,542	1.4%	Rank history: #17 in FY2021, #65 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2021.
9	Oneida Nation 3 awardees, including Sustainment & Restoration Services, LLC, Oneida Total Integrated Enterprises LLC and OCH JV Top agencies Army (Department of the Army) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$31,570,434	1.3%	Rank history: #16 in FY2021, #12 in FY2023, #42 in FY2024 and not on the FY2025 list; up 7 since FY2021.
10	Aptim Federal Services LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$30,239,232	1.3%	Rank history: #31 in FY2021, #17 in FY2023 and not on the FY2024–FY2025 lists; up 21 since FY2021.
11	Camp Dresser & Mckee Inc. Through CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior)	$29,804,754	1.3%	Rank history: #10 in FY2021 and not on the FY2023–FY2025 lists; down 1 since FY2021.
12	C M C, Inc. Top agencies EPA (Environmental Protection Agency)	$29,153,011	1.2%	Rank history: #27 in FY2021, #13 in FY2023, #19 in FY2024 and #60 in FY2025; up 15 since FY2021.
13	Cook Inlet Region Inc. 7 awardees, including North Wind Portage, Inc. and North Wind Site Services LLC Top agencies Army (Department of the Army) DOE (Department of Energy)	$26,139,068	1.1%	Rank history: #5 in FY2021, #9 in FY2023, #13 in FY2024 and not on the FY2025 list; down 8 since FY2021.
14	Kemron Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) USAF (Department of the Air Force)	$25,796,183	1.1%	Rank history: #11 in FY2021, #25 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2021.
15	Tetra Tech, Inc. 9 awardees Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) USAF (Department of the Air Force)	$25,385,429	1.1%	Rank history: #13 in FY2021, #23 in FY2023, #12 in FY2024 and #9 in FY2025; down 2 since FY2021.
16	Brice Engineering, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$24,624,045	1.0%	Rank history: #18 in FY2021, #15 in FY2023, #49 in FY2024 and #28 in FY2025; up 2 since FY2021.
17	Jacobs Engineering Group Inc. 5 awardees, including Ch2M Hill, Inc., Amentum Technology, Inc. and Jacobs Government Services Company Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) DOI (Department of the Interior)	$24,227,632	1.0%	Rank history: #6 in FY2021, #2 in FY2023, #14 in FY2024 and not on the FY2025 list; down 11 since FY2021.
18	Hgl-Aptim JV LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) DLA (Defense Logistics Agency)	$21,813,380	0.9%	Rank history: #45 in FY2021, #38 in FY2023, #17 in FY2024 and #21 in FY2025; up 27 since FY2021.
19	Couvillion Group LLC Top agencies DHS (Department of Homeland Security)	$21,562,598	0.9%	Rank history: #22 in FY2021, #22 in FY2023, #32 in FY2024 and #18 in FY2025; up 3 since FY2021.
20	Kemron / Arrowhead JV, LLC Top agencies EPA (Environmental Protection Agency)	$21,470,023	0.9%	Rank history: #40 in FY2021, #14 in FY2023 and not on the FY2024–FY2025 lists; up 20 since FY2021.
21	Ch2M Hill, Inc. Top agencies EPA (Environmental Protection Agency)	$20,645,512	0.9%	Rank history: #85 in FY2021, not on the FY2023 list, #33 in FY2024 and #41 in FY2025; up 64 since FY2021.
22	Global Diving & Salvage, Inc. Top agencies DHS (Department of Homeland Security)	$17,933,340	0.8%	Rank history: #44 in FY2021, not on the FY2023 list, #55 in FY2024 and not on the FY2025 list; up 22 since FY2021.
23	F & L Environmental LLC Top agencies USDA (Department of Agriculture)	$17,346,898	0.7%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
24	Hdr, Inc. 4 awardees, including HDR Aptim LLC, HDR Environmental, Operations and Construction, Inc. and HDR Engineering, Inc. Top agencies EPA (Environmental Protection Agency) Navy (Department of the Navy) Army (Department of the Army)	$17,176,522	0.7%	Rank history: #28 in FY2021, #30 in FY2023, #72 in FY2024 and not on the FY2025 list; up 4 since FY2021.
25	The Source Group, Inc. Top agencies DLA (Defense Logistics Agency)	$16,757,626	0.7%	Rank history: #43 in FY2021, not on the FY2023 list, #69 in FY2024 and #54 in FY2025; up 18 since FY2021.
26	Cape Environmental Management Inc. Top agencies Navy (Department of the Navy)	$16,225,958	0.7%	Rank history: #62 in FY2021, not on the FY2023–FY2024 lists and #56 in FY2025; up 36 since FY2021.
27	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies DOI (Department of the Interior) SSA (Social Security Administration)	$15,831,844	0.7%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 371 since FY2021.
28	Itsi Gilbane Japan G.K. 2 awardees, including Gilbane Federal and Ges-Aecom JV Top agencies Navy (Department of the Navy) EPA (Environmental Protection Agency)	$14,988,635	0.6%	Rank history: #14 in FY2021 and not on the FY2023–FY2025 lists; down 14 since FY2021.
29	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior)	$14,143,813	0.6%	Rank history: #33 in FY2021, #26 in FY2023, #15 in FY2024 and #26 in FY2025; up 4 since FY2021.
30	Nobis Engineering, Inc. Top agencies EPA (Environmental Protection Agency)	$13,534,283	0.6%	Rank history: #47 in FY2021, not on the FY2023 list, #30 in FY2024 and not on the FY2025 list; up 17 since FY2021.
31	Energysolutions LLC 2 awardees, including Energysolutions Services, Inc. Top agencies Navy (Department of the Navy)	$13,168,723	0.6%	Rank history: #34 in FY2021, #41 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
32	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)	$11,497,687	0.5%	Rank history: #9 in FY2021, #6 in FY2023, #28 in FY2024 and #4 in FY2025; down 23 since FY2021.
33	Fpm-Aecom JV1 Top agencies Army (Department of the Army)	$11,364,433	0.5%	Rank history: not on the FY2021 list, #24 in FY2023, #39 in FY2024 and #58 in FY2025; up 154 since FY2021.
34	Navarro Research and Engineering, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$11,360,179	0.5%	Rank history: #36 in FY2021, #51 in FY2023, #36 in FY2024 and #47 in FY2025; up 2 since FY2021.
35	Parsons Corporation Through Parsons Government Services Inc. Top agencies Army (Department of the Army)	$10,658,531	0.5%	Rank history: #23 in FY2021, #36 in FY2023, #70 in FY2024 and #32 in FY2025; down 12 since FY2021.
36	Weston Solutions Holdings, Inc. Through Weston Solutions Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$9,946,649	0.4%	Rank history: #74 in FY2021, #49 in FY2023, #23 in FY2024 and #44 in FY2025; up 38 since FY2021.
37	Red Rock Remediation JV Top agencies EPA (Environmental Protection Agency)	$8,678,481	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
38	Pika International, Inc. Top agencies Army (Department of the Army)	$8,257,572	0.3%	Rank history: #42 in FY2021, #98 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2021.
39	A and M Engineering & Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency)	$7,833,835	0.3%	Rank history: #41 in FY2021, not on the FY2023 list, #56 in FY2024 and #53 in FY2025; up 2 since FY2021.
40	Paragon-Jacobs Joint Venture, LLC Top agencies Army (Department of the Army)	$7,597,847	0.3%	Rank history: #56 in FY2021, not on the FY2023–FY2024 lists and #98 in FY2025; up 16 since FY2021.
41	Seaon Environmental LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$7,472,673	0.3%	Rank history: #49 in FY2021, #47 in FY2023, #50 in FY2024 and #39 in FY2025; up 8 since FY2021.
42	Engineering / Remediation Resources Group, Inc. 3 awardees Top agencies Navy (Department of the Navy) DOT (Department of Transportation)	$7,317,687	0.3%	Rank history: #92 in FY2021, not on the FY2023 list, #43 in FY2024 and #72 in FY2025; up 50 since FY2021.
43	Research Triangle Institute Top agencies EPA (Environmental Protection Agency)	$7,098,144	0.3%	Rank history: #84 in FY2021, #33 in FY2023, #53 in FY2024 and #52 in FY2025; up 41 since FY2021.
44	Battelle Memorial Institute Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$6,983,839	0.3%	Rank history: #30 in FY2021, #63 in FY2023 and not on the FY2024–FY2025 lists; down 14 since FY2021.
45	Ahtna, Incorporated 4 awardees, including Ahtna Global LLC, Ahtna Engineering Services, LLC and Ahtna Design-Build Inc. Top agencies DOT (Department of Transportation) Army (Department of the Army) DOE (Department of Energy)	$6,907,185	0.3%	Rank history: #24 in FY2021, #45 in FY2023 and not on the FY2024–FY2025 lists; down 21 since FY2021.
46	Versar-Arcadis A Joint Venture Top agencies Army (Department of the Army)	$6,756,229	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 59 since FY2021.
47	Patriot Environmental Services, Inc. Top agencies USDA (Department of Agriculture) DHS (Department of Homeland Security)	$6,696,246	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 436 since FY2021.
48	Lewis Environmental LLC Top agencies USDA (Department of Agriculture) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$6,680,750	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 68 since FY2021.
49	Weston-Techlaw JV LLC Top agencies EPA (Environmental Protection Agency)	$6,656,565	0.3%	Rank history: not on the FY2021 list, #31 in FY2023, #40 in FY2024 and #43 in FY2025; up 152 since FY2021.
50	Ie-Weston Federal Services JVB LLC Top agencies Army (Department of the Army)	$6,539,159	0.3%	Rank history: #35 in FY2021 and not on the FY2023–FY2025 lists; down 15 since FY2021.
51	ST George Tanaq Corp 2 awardees, including Tanaq Environmental LLC and Heliotech Top agencies USAF (Department of the Air Force) EPA (Environmental Protection Agency) Army (Department of the Army)	$6,443,645	0.3%	Rank history: #96 in FY2021, #43 in FY2023 and not on the FY2024–FY2025 lists; up 45 since FY2021.
52	Environmental Compliance Consultants, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior) DHS (Department of Homeland Security)	$6,083,775	0.3%	Rank history: #52 in FY2021, #55 in FY2023, #63 in FY2024 and #97 in FY2025; unchanged since FY2021.
53	Bethel Environmental Solutions LLC Top agencies Army (Department of the Army)	$6,077,449	0.3%	Rank history: #72 in FY2021 and not on the FY2023–FY2025 lists; up 19 since FY2021.
54	Sol Solutions, LLC Top agencies Army (Department of the Army)	$5,709,112	0.2%	Rank history: #48 in FY2021, #61 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2021.
55	Contaminant Control, Inc. Top agencies USDA (Department of Agriculture)	$5,655,482	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
56	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior) DOE (Department of Energy)	$5,457,060	0.2%	Rank history: #20 in FY2021, #29 in FY2023, #62 in FY2024 and not on the FY2025 list; down 36 since FY2021.
57	Sevenson-Usa Environmental Joint Venture Top agencies Army (Department of the Army)	$5,353,828	0.2%	Rank history: #19 in FY2021, #64 in FY2023 and not on the FY2024–FY2025 lists; down 38 since FY2021.
58	Applied Research Associates, Inc. Top agencies DOI (Department of the Interior)	$5,228,190	0.2%	Rank history: #26 in FY2021, #85 in FY2023, #71 in FY2024 and #66 in FY2025; down 32 since FY2021.
59	B.E. Scaife Plumbing Company Inc Top agencies EPA (Environmental Protection Agency)	$5,218,922	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
60	Bayside Engineering Construction Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$5,193,207	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 81 since FY2021.
61	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) DHS (Department of Homeland Security) Navy (Department of the Navy)	$5,174,268	0.2%	Rank history: #93 in FY2021, #74 in FY2023 and not on the FY2024–FY2025 lists; up 32 since FY2021.
62	Pi2E JV LLP Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$5,091,077	0.2%	Rank history: #91 in FY2021 and not on the FY2023–FY2025 lists; up 29 since FY2021.
63	CDM A Joint Venture Top agencies EPA (Environmental Protection Agency)	$4,898,532	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
64	KGS Seres 8A JV LLC Top agencies Army (Department of the Army)	$4,860,600	0.2%	Rank history: #59 in FY2021, #75 in FY2023, #80 in FY2024 and not on the FY2025 list; down 5 since FY2021.
65	Otie-Pwt JV, LLC Top agencies EPA (Environmental Protection Agency)	$4,456,106	0.2%	Rank history: not on the FY2021 list, #78 in FY2023 and not on the FY2024–FY2025 lists; up 68 since FY2021.
66	USA Environmental, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$4,265,823	0.2%	Rank history: not on the FY2021 list, #86 in FY2023 and not on the FY2024–FY2025 lists; new.
67	Montrose Environmental Group Inc. Through Pars Environmental Inc. Top agencies EPA (Environmental Protection Agency)	$4,263,720	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
68	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)	$4,198,237	0.2%	Rank history: #71 in FY2021, #59 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
69	Brice Solutions, LLC Top agencies DOT (Department of Transportation)	$4,063,902	0.2%	Rank history: not on the FY2021 list, #37 in FY2023, #34 in FY2024 and #83 in FY2025; up 182 since FY2021.
70	Triumvirate Environmental, LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Commerce (Department of Commerce)	$4,011,935	0.2%	Rank history: #58 in FY2021, #57 in FY2023, #60 in FY2024 and #59 in FY2025; down 12 since FY2021.
71	Composting Sme, LLC Top agencies USDA (Department of Agriculture)	$3,782,770	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
72	EQ & CH Remediation Top agencies EPA (Environmental Protection Agency)	$3,686,816	0.2%	Rank history: #25 in FY2021, #35 in FY2023, #16 in FY2024 and not on the FY2025 list; down 47 since FY2021.
73	Enviro-Terra Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$3,639,060	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
74	Day & Zimmermann Lone Star LLC Top agencies Army (Department of the Army)	$3,612,538	0.2%	Rank history: #86 in FY2021 and not on the FY2023–FY2025 lists; up 12 since FY2021.
75	Whitetail Environmental, LLC Top agencies Army (Department of the Army) DHA (Defense Health Agency)	$3,514,670	0.1%	Rank history: not on the FY2021 list, #80 in FY2023 and not on the FY2024–FY2025 lists; up 45 since FY2021.
76	Tanadgusix Corporation Through Bering Sea Eccotech, LLC Top agencies Navy (Department of the Navy)	$3,476,160	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 59 since FY2021.
77	Ayuda-Plexus Joint Venture LLC Top agencies Army (Department of the Army)	$3,442,143	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
78	Petroleum Resources & Development, Inc. Top agencies USAF (Department of the Air Force) DOT (Department of Transportation)	$3,391,193	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 239 since FY2021.
79	Toeroek Associates, Inc. Top agencies EPA (Environmental Protection Agency)	$3,391,092	0.1%	Rank history: not on the FY2021 list, #89 in FY2023 and not on the FY2024–FY2025 lists; up 302 since FY2021.
80	Ces-Rescon LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$3,291,702	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 144 since FY2021.
81	Sdc-Philo JV LLC Top agencies Army (Department of the Army)	$3,275,682	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 168 since FY2021.
82	C & C Environmental Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$3,261,472	0.1%	Rank history: #67 in FY2021, #90 in FY2023, #100 in FY2024 and #76 in FY2025; down 15 since FY2021.
83	Straughan Environmental, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$3,177,527	0.1%	Rank history: #78 in FY2021, #94 in FY2023, not on the FY2024 list and #80 in FY2025; down 5 since FY2021.
84	Pacific Commercial Services, Inc. Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$3,101,018	0.1%	Rank history: #69 in FY2021 and not on the FY2023–FY2025 lists; down 15 since FY2021.
85	Techlaw, Inc. Through Techlaw Consultants Inc. Top agencies EPA (Environmental Protection Agency)	$3,083,901	0.1%	Rank history: #76 in FY2021, #91 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2021.
86	B&V E&E JV Top agencies EPA (Environmental Protection Agency)	$3,080,801	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 28 since FY2021.
87	Tepa, LLC 3 awardees, including Tehama Technical Services, LLC, Tehama ECS LLC and Tehama, LLC Top agencies Army (Department of the Army) USDA (Department of Agriculture) DOI (Department of the Interior)	$2,836,179	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 118 since FY2021.
88	Versar-Envirocon JV Top agencies EPA (Environmental Protection Agency)	$2,738,756	0.1%	Rank history: not on the FY2021 list, #53 in FY2023 and not on the FY2024–FY2025 lists; new.
89	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)	$2,719,946	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 37 since FY2021.
90	Environmental Management & Planning Solutions LLC Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$2,674,867	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 20 since FY2021.
91	K.i. Kogyo Ltd. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$2,670,310	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 41 since FY2021.
92	Specpro Professional Services, LLC Top agencies Army (Department of the Army)	$2,599,044	0.1%	Rank history: #94 in FY2021 and not on the FY2023–FY2025 lists; up 2 since FY2021.
93	Ones Whitetail Joint Venture LLC Top agencies Army (Department of the Army)	$2,557,940	0.1%	Rank history: #80 in FY2021 and not on the FY2023–FY2025 lists; down 13 since FY2021.
94	Mecx-Bts Sdvosb JV LLC Top agencies Navy (Department of the Navy)	$2,542,665	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 104 since FY2021.
95	RSI Services LLC Top agencies DOE (Department of Energy)	$2,507,812	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 22 since FY2021.
96	Hana Engineers & Consultants LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$2,383,050	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
97	Bsx, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$2,381,405	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 15 since FY2021.
98	US Ecology, Inc. 8 awardees, including NRC Environmental Services Inc., US Ecology Washington Inc. and National Response Corporation Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) USAF (Department of the Air Force)	$2,371,585	0.1%	Rank history: not on the FY2021 list, #66 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
99	Bristol Environmental Solutions LLC Top agencies Army (Department of the Army)	$2,285,640	0.1%	Rank history: #12 in FY2021 and not on the FY2023–FY2025 lists; down 87 since FY2021.
100	Plug In Utility Services Corp Top agencies DHS (Department of Homeland Security)	$2,278,157	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.

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100 of 1,196 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	$1,937,081,144	Bechtel Corp
F115 Environmental Systems Protection – Environmental Consulting and Legal Support	$81,198,311	ICF International, Inc.
F112 Oil Spill Response including Cleanup, Removal, Disposal and Operational Support	$78,023,724	Couvillion Group LLC
F110 Development of Environmental Impact Statements and Assessments	$24,168,339	Bayside Engineering Construction Inc.
F103 Water Quality Support Services	$21,619,700	EQ & CH Remediation
F101 Air Quality Support Services	$17,992,724	Research Triangle Institute
F107 Hazardous Substance Analysis	$14,711,097	Enviro-Terra Inc.
F105 Pesticides Support Services	$9,505,897	RGZ Forestry LLC
F114 Environmental Systems Protection – Environmental Licensing and Permitting	$8,018,278	Brice Engineering, 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 $2.36 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 F1 contractors in FY2022?

1. Bechtel Corp ($786M), 2. EA Engineering, Science, and Technology, Inc., PBC ($135M), 3. Environmental Restoration LLC ($75.1M), 4. Hydrogeologic, Inc. ($53.5M), 5. AECOM ($48.7M), 6. Amentum Services, Inc. ($38.4M), 7. North Wind Portage, Inc. ($34.4M), 8. Cabrera Services Inc. ($34M), 9. Oneida Nation ($31.6M), 10. Aptim Federal Services LLC ($30.2M).

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