Top 100 Contractors in NAICS 56291: Remediation Services, FY2022

Name: Top 100 Contractors in NAICS 56291: Remediation Services, FY2022
Creator: GovTribe

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

The top 10 won 51% of FY2022 NAICS 56291 contract dollars

Contract obligations: $4,861,122,308 Net of deobligations, by contracts coded NAICS 56291 or a code under it
Contractors: 847 Parent companies with an obligation
Largest contractor: Savannah River Mission Completion, LLC $642 million, 12.3% 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	Savannah River Mission Completion, LLC Top agencies DOE (Department of Energy)	$642,161,403	12.3%	Rank history: not on the FY2021 list, #1 in FY2023, #1 in FY2024 and #2 in FY2025; new.
2	Amentum Services, Inc. Through Central Plateau Cleanup Company, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy)	$572,752,285	10.9%	Rank history: #3 in FY2021, #3 in FY2023, #4 in FY2024 and not on the FY2025 list; up 1 since FY2021.
3	Fluor Corporation 2 awardees, including Fluor-Bwxt Portsmouth LLC and Fluor Idaho LLC Top agencies DOE (Department of Energy)	$443,845,024	8.5%	Rank history: #1 in FY2021, #4 in FY2023, #3 in FY2024 and #3 in FY2025; down 2 since FY2021.
4	AECOM 8 awardees, including Ucor LLC, AECOM Technical Services, Inc. and Amentum Environment & Energy, Inc. Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency) Army (Department of the Army)	$235,876,430	4.5%	Rank history: #2 in FY2021, #9 in FY2023, #65 in FY2024 and not on the FY2025 list; down 2 since FY2021.
5	EA Engineering, Science, and Technology, Inc., PBC 2 awardees Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) USAF (Department of the Air Force)	$212,619,686	4.1%	Rank history: #7 in FY2021, #6 in FY2023, #8 in FY2024 and #9 in FY2025; up 2 since FY2021.
6	Environmental Restoration LLC Top agencies EPA (Environmental Protection Agency) DOJ (Department of Justice)	$134,721,588	2.6%	Rank history: #9 in FY2021, #11 in FY2023, #21 in FY2024 and #10 in FY2025; up 3 since FY2021.
7	Hydrogeologic, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$108,251,846	2.1%	Rank history: #5 in FY2021, #7 in FY2023, #9 in FY2024 and #6 in FY2025; down 2 since FY2021.
8	Tetra Tech, Inc. 12 awardees, including Tetra TECH EC, Inc. Top agencies DOS (Department of State) Army (Department of the Army) USAF (Department of the Air Force)	$107,374,330	2.1%	Rank history: #12 in FY2021, #8 in FY2023, #19 in FY2024 and #11 in FY2025; up 4 since FY2021.
9	RSI Entech, LLC Top agencies DOE (Department of Energy)	$104,116,720	2.0%	Rank history: #13 in FY2021, #12 in FY2023, #14 in FY2024 and not on the FY2025 list; up 4 since FY2021.
10	Sevenson Environmental Services, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) Navy (Department of the Navy)	$98,034,311	1.9%	Rank history: #14 in FY2021, #13 in FY2023, #5 in FY2024 and #5 in FY2025; up 4 since FY2021.
11	Ch2M Hill Bwxt West Valley, LLC Top agencies DOE (Department of Energy)	$90,434,208	1.7%	Rank history: #8 in FY2021, #14 in FY2023, #34 in FY2024 and not on the FY2025 list; down 3 since FY2021.
12	J.f. Brennan Company, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$79,324,359	1.5%	Rank history: not on the FY2021 list, not on the FY2023 list, #42 in FY2024 and #99 in FY2025; up 242 since FY2021.
13	Hanford Laboratory Management and Integration LLC Top agencies DOE (Department of Energy)	$76,900,323	1.5%	Rank history: #21 in FY2021, #15 in FY2023, #10 in FY2024 and #12 in FY2025; up 8 since FY2021.
14	Cape Environmental Management Inc. 3 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$69,355,848	1.3%	Rank history: #11 in FY2021, #38 in FY2023, #45 in FY2024 and #26 in FY2025; down 3 since FY2021.
15	Cook Inlet Region Inc. 10 awardees, including North Wind Portage, Inc., North Wind Site Services LLC and North Wind Construction Services, LLC Top agencies DOE (Department of Energy) Army (Department of the Army) DOI (Department of the Interior)	$61,861,929	1.2%	Rank history: #6 in FY2021, #24 in FY2023, #28 in FY2024 and not on the FY2025 list; down 9 since FY2021.
16	Navarro Research and Engineering, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army) USAF (Department of the Air Force)	$60,898,478	1.2%	Rank history: #10 in FY2021, #21 in FY2023, #20 in FY2024 and #16 in FY2025; down 6 since FY2021.
17	Oneida Nation 5 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) DMA (Defense Media Activity)	$56,267,359	1.1%	Rank history: #19 in FY2021, #22 in FY2023, #69 in FY2024 and not on the FY2025 list; up 2 since FY2021.
18	Westinghouse Electric Company LLC Through Westinghouse Government Services LLC Top agencies Army (Department of the Army)	$55,974,188	1.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
19	Aptim Federal Services LLC Top agencies Navy (Department of the Navy) EPA (Environmental Protection Agency) Army (Department of the Army)	$43,962,754	0.8%	Rank history: #32 in FY2021, #10 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2021.
20	Camp Dresser & Mckee Inc. 2 awardees, including CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency)	$43,921,333	0.8%	Rank history: #31 in FY2021 and not on the FY2023–FY2025 lists; up 11 since FY2021.
21	Parsons Corporation Through Parsons Government Services Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$40,319,601	0.8%	Rank history: #51 in FY2021, #46 in FY2023, #59 in FY2024 and #28 in FY2025; up 30 since FY2021.
22	North Wind Portage, Inc. Top agencies DOE (Department of Energy)	$38,005,427	0.7%	Rank history: not on the FY2021 list, #90 in FY2023, #18 in FY2024 and #13 in FY2025; new.
23	Cabrera Services Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$34,130,730	0.7%	Rank history: #44 in FY2021 and not on the FY2023–FY2025 lists; up 21 since FY2021.
24	Seres Engineering & Services LLC 3 awardees, including Seres-Arcadis SB JV2 LLC and Seres-Arcadis 8(A) JV2 LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$33,277,240	0.6%	Rank history: #78 in FY2021 and not on the FY2023–FY2025 lists; up 54 since FY2021.
25	Brice Engineering, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOI (Department of the Interior)	$32,787,759	0.6%	Rank history: #45 in FY2021, #18 in FY2023, #49 in FY2024 and #30 in FY2025; up 20 since FY2021.
26	Fluor-Bwxt Portsmouth LLC Top agencies DOE (Department of Energy)	$30,870,000	0.6%	Rank history: #16 in FY2021 and not on the FY2023–FY2025 lists; down 10 since FY2021.
27	Ch2M Hill, Inc. Top agencies EPA (Environmental Protection Agency) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$30,784,126	0.6%	Rank history: not on the FY2021 list, not on the FY2023 list, #27 in FY2024 and #24 in FY2025; up 104 since FY2021.
28	Jacobs Engineering Group Inc. 10 awardees, including Ch2M Hill, Inc., Amentum Technology, Inc. and Ch2M Hill Plateau Remediation Company Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) USAF (Department of the Air Force)	$30,714,365	0.6%	Rank history: #4 in FY2021, #5 in FY2023, #6 in FY2024 and not on the FY2025 list; down 24 since FY2021.
29	Environmental Chemical Corporation 5 awardees, including ECC Insight Philotechnics LLC, ECC Insight LLC and ECC Environmental LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$29,432,144	0.6%	Rank history: #20 in FY2021, #27 in FY2023, #24 in FY2024 and #22 in FY2025; down 9 since FY2021.
30	C M C, Inc. Top agencies EPA (Environmental Protection Agency)	$29,153,011	0.6%	Rank history: #56 in FY2021, #28 in FY2023, #38 in FY2024 and #83 in FY2025; up 26 since FY2021.
31	Hgl-Aptim JV LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) DLA (Defense Logistics Agency)	$28,257,967	0.5%	Rank history: #36 in FY2021, #50 in FY2023, #32 in FY2024 and #35 in FY2025; up 5 since FY2021.
32	Kemron Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) USAF (Department of the Air Force)	$27,362,035	0.5%	Rank history: #27 in FY2021, #39 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2021.
33	Sevenson-Usa Environmental Joint Venture II Top agencies Navy (Department of the Navy)	$27,252,106	0.5%	Rank history: not on the FY2021 list, #31 in FY2023, #58 in FY2024 and not on the FY2025 list; new.
34	Weston - Er Federal Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$24,758,210	0.5%	Rank history: #15 in FY2021 and not on the FY2023–FY2025 lists; down 19 since FY2021.
35	Enterprise Technical Assistance Services Inc. Top agencies DOE (Department of Energy)	$23,373,185	0.4%	Rank history: #38 in FY2021, #36 in FY2023, #36 in FY2024 and #57 in FY2025; up 3 since FY2021.
36	Kemron / Arrowhead JV, LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$21,475,023	0.4%	Rank history: #76 in FY2021, #29 in FY2023 and not on the FY2024–FY2025 lists; up 40 since FY2021.
37	Engineering / Remediation Resources Group, Inc. 4 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) USDA (Department of Agriculture)	$20,383,356	0.4%	Rank history: #99 in FY2021, #60 in FY2023 and not on the FY2024–FY2025 lists; up 62 since FY2021.
38	Couvillion Group LLC Top agencies DHS (Department of Homeland Security)	$20,000,000	0.4%	Rank history: not on the FY2021 list, #42 in FY2023, #56 in FY2024 and #31 in FY2025; new.
39	Tikigaq Corporation Through Agviq LLC Top agencies Navy (Department of the Navy)	$19,477,261	0.4%	Rank history: #25 in FY2021, #84 in FY2023 and not on the FY2024–FY2025 lists; down 14 since FY2021.
40	Ahtna, Incorporated 3 awardees, including Ahtna Global LLC, Ahtna Environmental, Inc. and Ahtna Engineering Services, LLC Top agencies Army (Department of the Army) DOT (Department of Transportation) USAF (Department of the Air Force)	$19,207,564	0.4%	Rank history: #30 in FY2021, #44 in FY2023 and not on the FY2024–FY2025 lists; down 10 since FY2021.
41	The Source Group, Inc. Top agencies DLA (Defense Logistics Agency)	$18,310,741	0.3%	Rank history: #17 in FY2021, not on the FY2023 list, #90 in FY2024 and #60 in FY2025; down 24 since FY2021.
42	Arctic Slope Regional Corporation 3 awardees, including Environmental Quality Management, Inc., EQM Services, LLC and Mavo Systems Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) DOJ (Department of Justice)	$18,260,431	0.3%	Rank history: #24 in FY2021, #16 in FY2023, #53 in FY2024 and #4 in FY2025; down 18 since FY2021.
43	Global Diving & Salvage, Inc. Top agencies DHS (Department of Homeland Security)	$17,933,340	0.3%	Rank history: #85 in FY2021, not on the FY2023 list, #85 in FY2024 and not on the FY2025 list; up 42 since FY2021.
44	Aerostar Environmental and Construction LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$17,370,568	0.3%	Rank history: not on the FY2021 list, #70 in FY2023, #40 in FY2024 and #46 in FY2025; up 97 since FY2021.
45	Pika International, Inc. Top agencies Army (Department of the Army)	$17,247,858	0.3%	Rank history: #77 in FY2021 and not on the FY2023–FY2025 lists; up 32 since FY2021.
46	Hdr, Inc. 3 awardees, including HDR Aptim LLC and HDR Environmental, Operations and Construction, Inc. Top agencies EPA (Environmental Protection Agency) DLA (Defense Logistics Agency)	$16,005,778	0.3%	Rank history: #57 in FY2021, #56 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2021.
47	Calista Corp 2 awardees, including Brice Environmental Services Corporation Top agencies Army (Department of the Army) DOT (Department of Transportation) USAF (Department of the Air Force)	$15,669,840	0.3%	Rank history: #41 in FY2021, #88 in FY2023, #94 in FY2024 and not on the FY2025 list; down 6 since FY2021.
48	ARS Aleut Remediation LLC 2 awardees, including Aleut Remediation LLC Top agencies Army (Department of the Army)	$15,380,291	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
49	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) DLA (Defense Logistics Agency)	$15,300,574	0.3%	Rank history: #39 in FY2021 and not on the FY2023–FY2025 lists; down 10 since FY2021.
50	Bhate Environmental Associates, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$14,900,668	0.3%	Rank history: #63 in FY2021, #91 in FY2023, not on the FY2024 list and #91 in FY2025; up 13 since FY2021.
51	Natives of Kodiak, Incorporated 4 awardees, including Koman Government Solutions LLC, Environmental Assessment Services, LLC and Trinity Analysis and Development Corp. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$14,519,528	0.3%	Rank history: #48 in FY2021, #55 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2021.
52	USA Environmental, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$14,503,191	0.3%	Rank history: #46 in FY2021, #53 in FY2023, #60 in FY2024 and #41 in FY2025; down 6 since FY2021.
53	Nobis Engineering, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$14,162,364	0.3%	Rank history: #54 in FY2021, not on the FY2023 list, #48 in FY2024 and not on the FY2025 list; up 1 since FY2021.
54	BEM Systems Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$13,847,914	0.3%	Rank history: #100 in FY2021, #80 in FY2023 and not on the FY2024–FY2025 lists; up 46 since FY2021.
55	Leidos Holdings, Inc. Through Leidos, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$13,235,197	0.3%	Rank history: #52 in FY2021, #66 in FY2023, #97 in FY2024 and #43 in FY2025; down 3 since FY2021.
56	Nuclear Ship Support Services LLC Top agencies DOT (Department of Transportation)	$13,085,914	0.2%	Rank history: #18 in FY2021, #100 in FY2023, not on the FY2024 list and #79 in FY2025; down 38 since FY2021.
57	Tepa, LLC 4 awardees, including Tehama ECS LLC, Tehama Technical Services, LLC and Tehama, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOI (Department of the Interior)	$12,832,710	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 63 since FY2021.
58	Leisnoi Diversified Services, LLC Top agencies EPA (Environmental Protection Agency)	$12,325,729	0.2%	Rank history: #59 in FY2021, #83 in FY2023, #57 in FY2024 and #71 in FY2025; up 1 since FY2021.
59	Planned Systems International Inc. Through Advanced Technologies and Laboratories (Atl) International, Inc. Top agencies HHS (Department of Health and Human Services)	$12,231,633	0.2%	Rank history: not on the FY2021 list, #79 in FY2023 and not on the FY2024–FY2025 lists; new.
60	Hgl-Aptim Applied Science and Technology JV, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$12,081,439	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 64 since FY2021.
61	Fpm-Aecom JV1 Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$12,009,386	0.2%	Rank history: not on the FY2021 list, #25 in FY2023, #30 in FY2024 and #54 in FY2025; up 184 since FY2021.
62	Four Rivers Nuclear Partnership LLC Top agencies DOE (Department of Energy)	$11,873,151	0.2%	Rank history: #61 in FY2021, #47 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2021.
63	Professional Project Services, Inc. Top agencies DOE (Department of Energy)	$11,664,128	0.2%	Rank history: #65 in FY2021, not on the FY2023 list, #77 in FY2024 and #81 in FY2025; up 2 since FY2021.
64	Paragon Professional Services LLC Top agencies DOE (Department of Energy) Army (Department of the Army)	$11,205,326	0.2%	Rank history: #47 in FY2021, #33 in FY2023, #31 in FY2024 and #18 in FY2025; down 17 since FY2021.
65	Ahtna Solutions, LLC Top agencies USAF (Department of the Air Force)	$11,030,875	0.2%	Rank history: not on the FY2021 list, #87 in FY2023, #91 in FY2024 and #67 in FY2025; up 140 since FY2021.
66	Applied Aquatic Management, Inc. Top agencies Army (Department of the Army)	$10,720,061	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 52 since FY2021.
67	Weston Solutions Holdings, Inc. 2 awardees, including Weston Solutions Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$10,661,446	0.2%	Rank history: #83 in FY2021, not on the FY2023 list, #52 in FY2024 and not on the FY2025 list; up 16 since FY2021.
68	EQ & CH Remediation Top agencies EPA (Environmental Protection Agency)	$10,322,810	0.2%	Rank history: #53 in FY2021, #71 in FY2023, #35 in FY2024 and not on the FY2025 list; down 15 since FY2021.
69	Cherokee Nation Through Cherokee Federal Solutions, L.L.C. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$10,065,705	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 43 since FY2021.
70	Bay West LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$9,978,062	0.2%	Rank history: #69 in FY2021, #48 in FY2023, #55 in FY2024 and #36 in FY2025; down 1 since FY2021.
71	Huntington Ingalls Industries, Inc. 2 awardees, including Newport News Nuclear Bwxt-Los Alamos LLC Top agencies DOE (Department of Energy)	$9,469,253	0.2%	Rank history: #90 in FY2021, #81 in FY2023, not on the FY2024 list and #78 in FY2025; up 19 since FY2021.
72	Bay West-Ahtna Joint Venture, LLC Top agencies Army (Department of the Army)	$9,298,155	0.2%	Rank history: #29 in FY2021 and not on the FY2023–FY2025 lists; down 43 since FY2021.
73	GSI Mmrp JV LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$9,115,132	0.2%	Rank history: not on the FY2021 list, #94 in FY2023 and not on the FY2024–FY2025 lists; up 36 since FY2021.
74	The Chenega Corporation 3 awardees, including Chenega Healthcare Services LLC, Chenega Tri-Services, LLC and Chenega Support Services, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$9,053,704	0.2%	Rank history: #88 in FY2021 and not on the FY2023–FY2025 lists; up 14 since FY2021.
75	Environmental Compliance Consultants, Inc. Top agencies Army (Department of the Army)	$8,966,450	0.2%	Rank history: #86 in FY2021 and not on the FY2023–FY2025 lists; up 11 since FY2021.
76	ST George Tanaq Corp 3 awardees, including Tanaq Environmental LLC, Heliotech and Helios Resources, Ltd Top agencies USAF (Department of the Air Force) EPA (Environmental Protection Agency) Army (Department of the Army)	$8,944,918	0.2%	Rank history: #72 in FY2021, #65 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2021.
77	SES Civil and Environmental LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$8,920,419	0.2%	Rank history: #81 in FY2021, #68 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2021.
78	Brice-Aecom JV1 Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$8,911,933	0.2%	Rank history: #23 in FY2021, #59 in FY2023 and not on the FY2024–FY2025 lists; down 55 since FY2021.
79	Red Rock Remediation JV Top agencies EPA (Environmental Protection Agency)	$8,678,481	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
80	Seres-Arcadis SB JV, LLC Top agencies Army (Department of the Army)	$8,668,343	0.2%	Rank history: #71 in FY2021, #69 in FY2023, #62 in FY2024 and not on the FY2025 list; down 9 since FY2021.
81	Dawson Solutions, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$8,637,879	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 26 since FY2021.
82	Lg2-Qri JV LLC Top agencies Army (Department of the Army)	$8,219,426	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 70 since FY2021.
83	Ayuda-Plexus Joint Venture LLC Top agencies Army (Department of the Army)	$7,975,160	0.2%	Rank history: #68 in FY2021 and not on the FY2023–FY2025 lists; down 15 since FY2021.
84	Sevenson-Usa Environmental Joint Venture Top agencies Army (Department of the Army)	$7,889,319	0.2%	Rank history: #33 in FY2021 and not on the FY2023–FY2025 lists; down 51 since FY2021.
85	A and M Engineering & Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency)	$7,833,835	0.1%	Rank history: #75 in FY2021, not on the FY2023 list, #88 in FY2024 and #76 in FY2025; down 10 since FY2021.
86	Olgoonik Corporation 2 awardees, including FPM Remediations, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$7,761,902	0.1%	Rank history: #34 in FY2021, #57 in FY2023, #51 in FY2024 and #37 in FY2025; down 52 since FY2021.
87	Paragon-Jacobs Joint Venture, LLC Top agencies Army (Department of the Army)	$7,597,847	0.1%	Rank history: #98 in FY2021 and not on the FY2023–FY2025 lists; up 11 since FY2021.
88	CES Insight LLC Top agencies USAF (Department of the Air Force) DOT (Department of Transportation)	$6,971,797	0.1%	Rank history: #84 in FY2021 and not on the FY2023–FY2025 lists; down 4 since FY2021.
89	Versar-Arcadis A Joint Venture Top agencies Army (Department of the Army)	$6,823,398	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 24 since FY2021.
90	CDM A Joint Venture Top agencies EPA (Environmental Protection Agency) DOE (Department of Energy)	$6,714,493	0.1%	Rank history: not on the FY2021 list, not on the FY2023 list, #96 in FY2024 and not on the FY2025 list; up 131 since FY2021.
91	Ie-Weston Federal Services JVB LLC Top agencies Army (Department of the Army)	$6,539,159	0.1%	Rank history: #64 in FY2021 and not on the FY2023–FY2025 lists; down 27 since FY2021.
92	Industrial Economics Inc. Top agencies Commerce (Department of Commerce) DOE (Department of Energy)	$6,151,022	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 159 since FY2021.
93	Bethel Environmental Solutions LLC Top agencies Army (Department of the Army)	$6,053,638	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 32 since FY2021.
94	Lata-Cti Environmental Services LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$6,035,845	0.1%	Rank history: not on the FY2021 list, not on the FY2023 list, #84 in FY2024 and #77 in FY2025; up 35 since FY2021.
95	Native Hawaiian Community Development Corporation 3 awardees, including GSI North America Inc. and GSI Pacific Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$5,857,070	0.1%	Rank history: not on the FY2021 list, #63 in FY2023 and not on the FY2024–FY2025 lists; up 66 since FY2021.
96	Cti-Tpmc Environmental Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$5,707,499	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 20 since FY2021.
97	Bristol Environmental Solutions LLC Top agencies Army (Department of the Army)	$5,664,042	0.1%	Rank history: #28 in FY2021 and not on the FY2023–FY2025 lists; down 69 since FY2021.
98	Contaminant Control, Inc. Top agencies USDA (Department of Agriculture)	$5,655,482	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
99	Bhate Zapata, LLC Top agencies Army (Department of the Army)	$5,653,665	0.1%	Rank history: #35 in FY2021, #78 in FY2023 and not on the FY2024–FY2025 lists; down 64 since FY2021.
100	Aerostar SES LLC 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$5,641,444	0.1%	Rank history: #22 in FY2021, #32 in FY2023 and not on the FY2024–FY2025 lists; down 78 since FY2021.

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100 of 847 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 56291

Code	Net obligations	Largest contractor
562910 Remediation Services	$4,861,122,308	Savannah River Mission Completion, 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 $5.24 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 NAICS 56291 contractors in FY2022?

1. Savannah River Mission Completion, LLC ($642M), 2. Amentum Services, Inc. ($573M), 3. Fluor Corporation ($444M), 4. AECOM ($236M), 5. EA Engineering, Science, and Technology, Inc., PBC ($213M), 6. Environmental Restoration LLC ($135M), 7. Hydrogeologic, Inc. ($108M), 8. Tetra Tech, Inc. ($107M), 9. RSI Entech, LLC ($104M), 10. Sevenson Environmental Services, Inc. ($98M).

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