Top 100 Contractors in NAICS 562: Waste Management and Remediation Services, FY2021

Name: Top 100 Contractors in NAICS 562: Waste Management and Remediation Services, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 58% of FY2021 NAICS 562 contract dollars

Contract obligations: $7,315,645,247 Net of deobligations, by contracts coded NAICS 562 or a code under it
Contractors: 2,786 Parent companies with an obligation
Largest contractor: Amentum Services, Inc. $1.55 billion, 20.0% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Amentum Services, Inc. 3 awardees, including Savannah River Remediation LLC, Central Plateau Cleanup Company, LLC and Washington River Protection Solutions LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy)	$1,548,978,862	20.0%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and not on the FY2025 list; up 77 since FY2020.
2	Fluor Corporation 2 awardees, including Fluor Idaho LLC and Fluor-Bwxt Portsmouth LLC Top agencies DOE (Department of Energy)	$780,721,084	10.1%	Rank history: #4 in FY2022, #5 in FY2023, #6 in FY2024 and #6 in FY2025; up 4 since FY2020.
3	Bechtel Corp 2 awardees, including Bechtel Parsons Blue Grass, A Joint Venture and Bechtel National, Inc. Top agencies Army (Department of the Army)	$655,463,231	8.5%	Rank history: #2 in FY2022, #2 in FY2023, #4 in FY2024 and #10 in FY2025; up 2 since FY2020.
4	AECOM 14 awardees, including Ucor LLC, Washington River Protection Solutions LLC and AECOM Technical Services, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army) EPA (Environmental Protection Agency)	$559,675,107	7.2%	Rank history: #5 in FY2022, #11 in FY2023, #72 in FY2024 and not on the FY2025 list; down 3 since FY2020.
5	Washington River Protection Solutions LLC Top agencies DOE (Department of Energy)	$194,600,000	2.5%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
6	Cook Inlet Region Inc. 11 awardees, including North Wind Portage, Inc., OSC Technical Solutions, LLC and North Wind Construction Services, LLC Top agencies DOE (Department of Energy) Army (Department of the Army) DOI (Department of the Interior)	$178,794,505	2.3%	Rank history: #17 in FY2022, #26 in FY2023, #31 in FY2024 and not on the FY2025 list; up 7 since FY2020.
7	Jacobs Engineering Group Inc. 10 awardees, including Ch2M Hill Plateau Remediation Company, Amentum Technology, Inc. and Ch2M Hill, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army) EPA (Environmental Protection Agency)	$162,921,550	2.1%	Rank history: #30 in FY2022, #6 in FY2023, #8 in FY2024 and not on the FY2025 list; down 4 since FY2020.
8	Hydrogeologic, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$159,745,412	2.1%	Rank history: #8 in FY2022, #8 in FY2023, #13 in FY2024 and #15 in FY2025; up 3 since FY2020.
9	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)	$124,184,120	1.6%	Rank history: #6 in FY2022, #7 in FY2023, #11 in FY2024 and #17 in FY2025; up 3 since FY2020.
10	Ch2M Hill Bwxt West Valley, LLC Top agencies DOE (Department of Energy)	$89,609,295	1.2%	Rank history: #12 in FY2022, #15 in FY2023, #37 in FY2024 and not on the FY2025 list; up 6 since FY2020.
11	Environmental Restoration LLC Top agencies EPA (Environmental Protection Agency) DOJ (Department of Justice) USAF (Department of the Air Force)	$83,902,990	1.1%	Rank history: #7 in FY2022, #12 in FY2023, #25 in FY2024 and #18 in FY2025; up 7 since FY2020.
12	Navarro Research and Engineering, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army) USAF (Department of the Air Force)	$75,554,914	1.0%	Rank history: #18 in FY2022, #22 in FY2023, #24 in FY2024 and #24 in FY2025; up 2 since FY2020.
13	Cape Environmental Management Inc. 4 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$67,732,982	0.9%	Rank history: #15 in FY2022, #40 in FY2023, #51 in FY2024 and #38 in FY2025; up 7 since FY2020.
14	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)	$66,771,226	0.9%	Rank history: #9 in FY2022, #9 in FY2023, #23 in FY2024 and #19 in FY2025; up 1 since FY2020.
15	RSI Entech, LLC Top agencies DOE (Department of Energy)	$63,990,610	0.8%	Rank history: #10 in FY2022, #13 in FY2023, #18 in FY2024 and not on the FY2025 list; up 130 since FY2020.
16	Bechtel National, Inc. Top agencies Army (Department of the Army)	$63,000,000	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
17	Sevenson Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$60,825,094	0.8%	Rank history: #11 in FY2022, #14 in FY2023, #7 in FY2024 and #12 in FY2025; unchanged since FY2020.
18	Weston - Er Federal Services, LLC Top agencies USAF (Department of the Air Force)	$56,813,893	0.7%	Rank history: #36 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
19	Fluor-Bwxt Portsmouth LLC Top agencies DOE (Department of Energy)	$50,963,000	0.7%	Rank history: #28 in FY2022 and not on the FY2023–FY2025 lists; down 10 since FY2020.
20	The Source Group, Inc. Top agencies DLA (Defense Logistics Agency)	$40,911,297	0.5%	Rank history: #45 in FY2022, not on the FY2023–FY2024 lists and #78 in FY2025; up 29 since FY2020.
21	Nuclear Ship Support Services LLC Top agencies DOT (Department of Transportation)	$39,856,992	0.5%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
22	Oneida Nation 5 awardees, including Oneida Total Integrated Enterprises LLC and Sustainment & Restoration Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DMA (Defense Media Activity)	$38,698,576	0.5%	Rank history: #19 in FY2022, #23 in FY2023, #78 in FY2024 and not on the FY2025 list; down 3 since FY2020.
23	Environmental Chemical Corporation 3 awardees, including ECC Insight Philotechnics LLC and ECC Insight LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$38,465,262	0.5%	Rank history: #31 in FY2022, #24 in FY2023, #5 in FY2024 and #33 in FY2025; up 15 since FY2020.
24	Hanford Laboratory Management and Integration LLC Top agencies DOE (Department of Energy)	$37,946,839	0.5%	Rank history: #14 in FY2022, #16 in FY2023, #14 in FY2024 and #20 in FY2025; up 287 since FY2020.
25	Aerostar SES LLC 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$37,160,322	0.5%	Rank history: not on the FY2022 list, #33 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
26	Brice-Aecom JV1 Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$30,797,283	0.4%	Rank history: #95 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; up 158 since FY2020.
27	Arctic Slope Regional Corporation 2 awardees, including Environmental Quality Management, Inc. and EQM Services, LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$30,333,384	0.4%	Rank history: #46 in FY2022, #17 in FY2023, #58 in FY2024 and #9 in FY2025; up 35 since FY2020.
28	Tikigaq Corporation 2 awardees, including Agviq LLC and Tikigaq Construction, LLC Top agencies Navy (Department of the Navy)	$30,251,540	0.4%	Rank history: #41 in FY2022, #99 in FY2023 and not on the FY2024–FY2025 lists; up 37 since FY2020.
29	Aptim AECOM Decommissioning, LLC Top agencies Army (Department of the Army)	$28,844,304	0.4%	Rank history: not on the FY2022 list, #28 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
30	Aptim Federal Services LLC 2 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy) EPA (Environmental Protection Agency)	$27,953,595	0.4%	Rank history: #21 in FY2022, #10 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
31	Kemron Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$27,944,053	0.4%	Rank history: #34 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
32	Bristol Environmental Solutions LLC Top agencies Army (Department of the Army) DOI (Department of the Interior)	$27,212,173	0.4%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
33	Bay West-Ahtna Joint Venture, LLC Top agencies Army (Department of the Army)	$26,566,166	0.3%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
34	Ahtna, Incorporated 4 awardees, including Ahtna Global LLC, Ahtna Environmental, Inc. and Ahtna Facility Services, Incorporated Top agencies Army (Department of the Army) DOT (Department of Transportation) DOE (Department of Energy)	$26,463,914	0.3%	Rank history: #44 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
35	Camp Dresser & Mckee Inc. 3 awardees, including CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency)	$25,235,166	0.3%	Rank history: #22 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
36	Sevenson-Usa Environmental Joint Venture Top agencies Army (Department of the Army)	$22,004,737	0.3%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
37	Olgoonik Corporation 3 awardees, including FPM Remediations, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$21,096,055	0.3%	Rank history: not on the FY2022 list, #61 in FY2023, #56 in FY2024 and #49 in FY2025; up 90 since FY2020.
38	Bhate Zapata, LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$20,539,218	0.3%	Rank history: not on the FY2022 list, #89 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
39	Hgl-Aptim JV LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) EPA (Environmental Protection Agency)	$19,681,747	0.3%	Rank history: #33 in FY2022, #52 in FY2023, #35 in FY2024 and #47 in FY2025; up 40 since FY2020.
40	Guardian Environmental Services Co Inc. Top agencies EPA (Environmental Protection Agency)	$19,674,091	0.3%	Rank history: not on the FY2022–FY2025 lists; up 79 since FY2020.
41	Enterprise Technical Assistance Services Inc. Top agencies DOE (Department of Energy)	$19,628,505	0.3%	Rank history: #38 in FY2022, #37 in FY2023, #39 in FY2024 and #74 in FY2025; up 1 since FY2020.
42	Brice Engineering, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$19,198,691	0.2%	Rank history: #24 in FY2022, #18 in FY2023, #47 in FY2024 and #41 in FY2025; up 26 since FY2020.
43	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)	$18,594,309	0.2%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; up 62 since FY2020.
44	Ayuda MC2 JV LLC Top agencies EPA (Environmental Protection Agency)	$17,894,268	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
45	Calista Corp 3 awardees, including Brice Environmental Services Corporation Top agencies Army (Department of the Army) DOT (Department of Transportation) USAF (Department of the Air Force)	$17,739,199	0.2%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; down 18 since FY2020.
46	US Ecology, Inc. 11 awardees, including US Ecology Idaho, Inc., US Ecology Washington Inc. and US Ecology Holdings, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DHS (Department of Homeland Security)	$17,425,688	0.2%	Rank history: #42 in FY2022, #56 in FY2023, #79 in FY2024 and not on the FY2025 list; up 9 since FY2020.
47	Tli-Bay West Joint Venture, LLC Top agencies Army (Department of the Army)	$17,265,863	0.2%	Rank history: not on the FY2022–FY2025 lists; up 185 since FY2020.
48	Wood Environment & Infrastructure Solutions Inc. 3 awardees, including Wood Programs Inc., WSP E&Is GMBH and WSP USA Environment & Infrastructure Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$16,859,161	0.2%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
49	Cabrera Services Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$16,498,803	0.2%	Rank history: #26 in FY2022 and not on the FY2023–FY2025 lists; down 13 since FY2020.
50	USA Environmental, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DFAS (Defense Finance and Accounting Service)	$15,048,244	0.2%	Rank history: #57 in FY2022, #55 in FY2023, #68 in FY2024 and #54 in FY2025; down 18 since FY2020.
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)	$13,972,340	0.2%	Rank history: #54 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
52	Paragon Professional Services LLC Top agencies DOE (Department of Energy) Army (Department of the Army)	$13,758,654	0.2%	Rank history: #74 in FY2022, #34 in FY2023, #34 in FY2024 and #26 in FY2025; up 95 since FY2020.
53	Waste Management, Inc. 126 awardees, including Advanced Disposal Services Solid Waste Southeast Inc., Waste Management of New Jersey, Inc. and USA Waste of California, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$13,482,057	0.2%	Rank history: #58 in FY2022, #82 in FY2023 and not on the FY2024–FY2025 lists; up 30 since FY2020.
54	Mmg-Tli JV, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$12,949,712	0.2%	Rank history: not on the FY2022–FY2025 lists; up 136 since FY2020.
55	Tanaq-Ecm-8A JV Top agencies Army (Department of the Army) Navy (Department of the Navy)	$12,823,917	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	Parsons Corporation Through Parsons Government Services Inc. Top agencies Army (Department of the Army)	$12,694,186	0.2%	Rank history: #23 in FY2022, #48 in FY2023, #67 in FY2024 and #40 in FY2025; up 14 since FY2020.
57	Hamilton Alliance Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) Army (Department of the Army)	$12,585,693	0.2%	Rank history: #61 in FY2022, #63 in FY2023, #62 in FY2024 and #57 in FY2025; down 4 since FY2020.
58	Couvillion Group LLC Top agencies DHS (Department of Homeland Security)	$12,495,506	0.2%	Rank history: #39 in FY2022, #44 in FY2023, #61 in FY2024 and #43 in FY2025; down 27 since FY2020.
59	Yamaki Co., Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$12,352,363	0.2%	Rank history: #64 in FY2022, #84 in FY2023, #98 in FY2024 and #83 in FY2025; down 5 since FY2020.
60	Six-Nations Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$12,328,131	0.2%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
61	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$11,991,534	0.2%	Rank history: #62 in FY2022, #74 in FY2023, not on the FY2024 list and #56 in FY2025; up 13 since FY2020.
62	Waste Control Specialists LLC Top agencies DOE (Department of Energy) Army (Department of the Army) EPA (Environmental Protection Agency)	$11,911,013	0.2%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; up 202 since FY2020.
63	EQ & CH Remediation Top agencies EPA (Environmental Protection Agency)	$11,277,327	0.1%	Rank history: #80 in FY2022, #79 in FY2023, #38 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
64	Nobis Engineering, Inc. 2 awardees Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$11,098,002	0.1%	Rank history: #59 in FY2022, not on the FY2023 list, #54 in FY2024 and not on the FY2025 list; up 103 since FY2020.
65	Ea-Wood-1 MP JV Top agencies Navy (Department of the Navy)	$10,913,108	0.1%	Rank history: not on the FY2022 list, #47 in FY2023 and not on the FY2024–FY2025 lists; up 42 since FY2020.
66	C M C, Inc. Top agencies EPA (Environmental Protection Agency)	$10,755,863	0.1%	Rank history: #32 in FY2022, #29 in FY2023, #42 in FY2024 and not on the FY2025 list; down 32 since FY2020.
67	Hdr, Inc. 3 awardees, including HDR Aptim LLC, HDR Environmental, Operations and Construction, Inc. and Henningson, Durham & Richardson, P.C Top agencies EPA (Environmental Protection Agency) DLA (Defense Logistics Agency)	$10,638,830	0.1%	Rank history: #50 in FY2022, #60 in FY2023 and not on the FY2024–FY2025 lists; up 73 since FY2020.
68	Ayuda Arcadis 8A Joint Venture LLC Top agencies Army (Department of the Army)	$10,356,629	0.1%	Rank history: not on the FY2022–FY2025 lists; up 140 since FY2020.
69	Leisnoi Diversified Services, LLC Top agencies EPA (Environmental Protection Agency)	$10,035,316	0.1%	Rank history: #67 in FY2022, #98 in FY2023, #64 in FY2024 and #100 in FY2025; new, not ranked in FY2020.
70	ECO Burn Inc. Through Enercon Systems Inc. Top agencies Army (Department of the Army)	$10,020,301	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Energysolutions LLC 3 awardees, including Energysolutions Services, Inc. Top agencies Navy (Department of the Navy) DOE (Department of Energy)	$9,916,396	0.1%	Rank history: #63 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; down 21 since FY2020.
72	Arcadis N.V. 2 awardees, including Arcadis U.s., Inc. and Arcadis Consulting (Uk) Limited Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$9,884,797	0.1%	Rank history: not on the FY2022–FY2025 lists; down 43 since FY2020.
73	Four Rivers Nuclear Partnership LLC Top agencies DOE (Department of Energy)	$9,798,104	0.1%	Rank history: #72 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
74	Leisnoi-Kemron 8A JV, LLC Top agencies Navy (Department of the Navy)	$9,769,041	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Neie Medical Waste Services, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) Army (Department of the Army)	$9,727,499	0.1%	Rank history: #82 in FY2022, not on the FY2023 list, #99 in FY2024 and #87 in FY2025; down 3 since FY2020.
76	Bhate Environmental Associates, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Commerce (Department of Commerce)	$9,703,602	0.1%	Rank history: #55 in FY2022 and not on the FY2023–FY2025 lists; down 7 since FY2020.
77	Ie-Weston Federal Services JVB LLC Top agencies Army (Department of the Army)	$9,302,904	0.1%	Rank history: not on the FY2022–FY2025 lists; up 31 since FY2020.
78	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$9,154,199	0.1%	Rank history: #84 in FY2022, not on the FY2023–FY2024 lists and #73 in FY2025; up 8 since FY2020.
79	Professional Project Services, Inc. Top agencies DOE (Department of Energy)	$9,117,674	0.1%	Rank history: #73 in FY2022, not on the FY2023 list, #92 in FY2024 and not on the FY2025 list; down 2 since FY2020.
80	Advanced Technologies and Laboratories (Atl) International, Inc. Top agencies HHS (Department of Health and Human Services) SSA (Social Security Administration)	$9,037,970	0.1%	Rank history: not on the FY2022–FY2023 lists, #74 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
81	AECOM Technical Services, Inc. Top agencies Army (Department of the Army)	$8,933,759	0.1%	Rank history: not on the FY2022–FY2023 lists, #17 in FY2024 and #25 in FY2025; up 326 since FY2020.
82	Noreas Environmental Services LLC Top agencies Navy (Department of the Navy)	$8,922,371	0.1%	Rank history: not on the FY2022 list, #100 in FY2023, #89 in FY2024 and #76 in FY2025; unchanged since FY2020.
83	Ayuda-Plexus Joint Venture LLC Top agencies Army (Department of the Army)	$8,866,702	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Bay West LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOJ (Department of Justice)	$8,853,788	0.1%	Rank history: #83 in FY2022, #50 in FY2023, #60 in FY2024 and #48 in FY2025; down 38 since FY2020.
85	C & C Environmental Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DOI (Department of the Interior)	$8,843,861	0.1%	Rank history: #100 in FY2022, #96 in FY2023, #91 in FY2024 and #71 in FY2025; up 4 since FY2020.
86	Ea-Wood-2 MP JV Top agencies Army (Department of the Army)	$8,587,052	0.1%	Rank history: not on the FY2022–FY2025 lists; up 208 since FY2020.
87	Black Gold Industries Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$8,452,208	0.1%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
88	Seres Engineering & Services LLC 2 awardees, including Seres-Arcadis 8(A) JV2 LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) EPA (Environmental Protection Agency)	$8,448,347	0.1%	Rank history: #27 in FY2022 and not on the FY2023–FY2025 lists; down 29 since FY2020.
89	Seres-Arcadis SB JV, LLC Top agencies Army (Department of the Army)	$8,395,863	0.1%	Rank history: #97 in FY2022, #77 in FY2023, #69 in FY2024 and not on the FY2025 list; down 42 since FY2020.
90	ST George Tanaq Corp 3 awardees, including Tanaq Environmental LLC, Heliotech and Helios Resources, Ltd Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$8,225,480	0.1%	Rank history: #93 in FY2022, #72 in FY2023 and not on the FY2024–FY2025 lists; down 32 since FY2020.
91	Resolve Marine Group Inc. Top agencies DHS (Department of Homeland Security)	$8,123,380	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	The Chenega Corporation 5 awardees, including Chenega Healthcare Services LLC, Chenega Tri-Services, LLC and Chenega Integrated Security Solutions, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$8,060,091	0.1%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; down 17 since FY2020.
93	Wastren, Inc. Through VNS Federal Services LLC Top agencies DOE (Department of Energy)	$8,010,068	0.1%	Rank history: not on the FY2022–FY2025 lists; up 45 since FY2020.
94	A and M Engineering & Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency)	$7,929,157	0.1%	Rank history: not on the FY2022–FY2025 lists; up 115 since FY2020.
95	Perry Management Corp of South Dakota, L.l.c Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$7,760,019	0.1%	Rank history: #98 in FY2022, not on the FY2023 list, #75 in FY2024 and #70 in FY2025; up 36 since FY2020.
96	Kemron / Arrowhead JV, LLC Top agencies EPA (Environmental Protection Agency)	$7,735,868	0.1%	Rank history: #40 in FY2022, #30 in FY2023 and not on the FY2024–FY2025 lists; up 40 since FY2020.
97	Pika International, Inc. Top agencies Army (Department of the Army)	$7,633,614	0.1%	Rank history: #37 in FY2022 and not on the FY2023–FY2025 lists; up 77 since FY2020.
98	Alaska Peninsula Corporation Through Talarik Research and Restoration Services LLC Top agencies USAF (Department of the Air Force)	$7,387,972	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Industrial Waste Utilization, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$7,283,720	0.1%	Rank history: not on the FY2022–FY2025 lists; up 26 since FY2020.
100	Asl-Mmg Joint Venture LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$7,279,820	0.1%	Rank history: not on the FY2022–FY2025 lists; up 53 since FY2020.

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100 of 2,786 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 562

Code	Net obligations	Largest contractor
5629 Remediation and Other Waste Management Services	$4,586,998,641	Fluor Corporation
5622 Waste Treatment and Disposal	$2,416,759,951	Amentum Services, Inc.
5621 Waste Collection	$311,886,656	Couvillion Group 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 $7.74 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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 562 contractors in FY2021?

1. Amentum Services, Inc. ($1.55B), 2. Fluor Corporation ($781M), 3. Bechtel Corp ($655M), 4. AECOM ($560M), 5. Washington River Protection Solutions LLC ($195M), 6. Cook Inlet Region Inc. ($179M), 7. Jacobs Engineering Group Inc. ($163M), 8. Hydrogeologic, Inc. ($160M), 9. EA Engineering, Science, and Technology, Inc., PBC ($124M), 10. Ch2M Hill Bwxt West Valley, LLC ($89.6M).

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