Top 100 Contractors in NAICS 562: Waste Management and Remediation Services, FY2025

Name: Top 100 Contractors in NAICS 562: Waste Management and Remediation Services, FY2025
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 64% of FY2025 NAICS 562 contract dollars

Contract obligations: $13,296,463,706 Net of deobligations, by contracts coded NAICS 562 or a code under it
Contractors: 2,668 Parent companies with an obligation
Largest contractor: Environmental Chemical Corporation $1.97 billion, 14.1% of obligations
Data as of: Oct 23, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Environmental Chemical Corporation 4 awardees, including ECC Constructors LLC, ECC Environmental LLC and Enviro-Fix Solutions LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security) EPA (Environmental Protection Agency)	$1,967,910,504	14.1%	Rank history: #23 in FY2021, #31 in FY2022, #24 in FY2023 and #5 in FY2024; up 4 since FY2024.
2	Ashbritt Inc. Top agencies Army (Department of the Army)	$1,830,121,525	13.1%	Rank history: not on the FY2021–FY2024 lists; new.
3	Amentum Holdings, Inc. 11 awardees, including Central Plateau Cleanup Company, LLC, United Cleanup Oak Ridge LLC and Idaho Environmental Coalition LLC Top agencies DOE (Department of Energy) Army (Department of the Army) DOT (Department of Transportation)	$1,738,818,844	12.5%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2024; up 9 since FY2024.
4	Savannah River Mission Completion, LLC Top agencies DOE (Department of Energy)	$1,062,510,600	7.6%	Rank history: not on the FY2021 list, #3 in FY2022, #3 in FY2023 and #2 in FY2024; down 2 since FY2024.
5	Hanford Tank Waste Operations & Closure, LLC Top agencies DOE (Department of Energy)	$796,035,008	5.7%	Rank history: not on the FY2021–FY2024 lists; new.
6	Fluor Corporation 2 awardees, including Fluor-Bwxt Portsmouth LLC Top agencies DOE (Department of Energy)	$427,163,019	3.1%	Rank history: #2 in FY2021, #4 in FY2022, #5 in FY2023 and #6 in FY2024; unchanged since FY2024.
7	Bering Straits Native Corporation 7 awardees, including Bering Straits Global Innovations, LLC, Paragon Professional Services LLC and Bering Straits Construction Solutions, LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) DOE (Department of Energy)	$365,601,988	2.6%	Rank history: not on the FY2021–FY2024 lists; new.
8	Bechtel Parsons Blue Grass, A Joint Venture Top agencies Army (Department of the Army)	$289,456,116	2.1%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2024; up 1 since FY2024.
9	Arctic Slope Regional Corporation 6 awardees, including Environmental Quality Management, Inc., RSI Entech, LLC and EQ & CH Remediation Top agencies EPA (Environmental Protection Agency) DOE (Department of Energy) USAF (Department of the Air Force)	$270,676,058	1.9%	Rank history: #27 in FY2021, #46 in FY2022, #17 in FY2023 and #58 in FY2024; up 49 since FY2024.
10	Bechtel Corp Through Bechtel National, Inc. Top agencies Army (Department of the Army)	$237,663,874	1.7%	Rank history: #3 in FY2021, #2 in FY2022, #2 in FY2023 and #4 in FY2024; down 6 since FY2024.
11	JBW Group LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$237,651,410	1.7%	Rank history: not on the FY2021–FY2024 lists; up 187 since FY2024.
12	Sevenson Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$206,477,198	1.5%	Rank history: #17 in FY2021, #11 in FY2022, #14 in FY2023 and #7 in FY2024; down 5 since FY2024.
13	Tmsab LLC Top agencies Army (Department of the Army)	$169,307,091	1.2%	Rank history: not on the FY2021–FY2024 lists; new.
14	Guidehouse Inc. 3 awardees, including Aptim Federal Services, LLC, Aptim-Amentum Alaska Decommissioning LLC and Aptim Hdr, LLC Top agencies DOE (Department of Energy) Army (Department of the Army) Navy (Department of the Navy)	$149,096,148	1.1%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2024; up 6 since FY2024.
15	Hydrogeologic, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) Navy (Department of the Navy)	$136,735,233	1.0%	Rank history: #8 in FY2021, #8 in FY2022, #8 in FY2023 and #13 in FY2024; down 2 since FY2024.
16	United Cleanup Oak Ridge LLC Top agencies DOE (Department of Energy)	$132,359,640	0.9%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2023 and #3 in FY2024; down 13 since FY2024.
17	EA Engineering Science and Technology Inc. PBC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$118,595,769	0.9%	Rank history: #9 in FY2021, #6 in FY2022, #7 in FY2023 and #11 in FY2024; down 6 since FY2024.
18	Tetra Tech, Inc. 10 awardees, including Tetra TECH EC, Inc. Top agencies DOS (Department of State) Army (Department of the Army) DOE (Department of Energy)	$118,022,622	0.8%	Rank history: #14 in FY2021, #9 in FY2022, #9 in FY2023 and #23 in FY2024; up 5 since FY2024.
19	Environmental Restoration LLC Top agencies EPA (Environmental Protection Agency) DOJ (Department of Justice) Army (Department of the Army)	$115,739,993	0.8%	Rank history: #11 in FY2021, #7 in FY2022, #12 in FY2023 and #25 in FY2024; up 6 since FY2024.
20	Ciri Development Corporation 5 awardees, including North Wind Portage, Inc., North Wind Site Services, LLC and North Wind General Contractors LLC Top agencies DOE (Department of Energy) Army (Department of the Army) DOI (Department of the Interior)	$110,376,839	0.8%	Rank history: not on the FY2021 list, #16 in FY2022, #57 in FY2023 and not on the FY2024 list; up 292 since FY2024.
21	Hanford Laboratory Management and Integration LLC Top agencies DOE (Department of Energy)	$110,020,720	0.8%	Rank history: #24 in FY2021, #14 in FY2022, #16 in FY2023 and #14 in FY2024; down 7 since FY2024.
22	Energy Technology Alliance LLC Top agencies DOE (Department of Energy)	$86,714,314	0.6%	Rank history: not on the FY2021–FY2023 lists and #15 in FY2024; down 7 since FY2024.
23	Idaho Environmental Coalition LLC Top agencies DOE (Department of Energy)	$84,603,000	0.6%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2024; down 4 since FY2024.
24	Navarro Research and Engineering, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army)	$69,124,871	0.5%	Rank history: #12 in FY2021, #18 in FY2022, #22 in FY2023 and #24 in FY2024; unchanged since FY2024.
25	Bristol Bay Native Corporation 8 awardees, including Aerostar SES LLC, Bristol Environmental Solutions LLC and Aerostar Environmental and Construction LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$65,415,602	0.5%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2023 and not on the FY2024 list; up 91 since FY2024.
26	AECOM 7 awardees, including AECOM Technical Services, Inc., URS Group, Inc. and AECOM Arcadis Pfas JV Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) DLA (Defense Logistics Agency)	$63,730,187	0.5%	Rank history: #4 in FY2021, #5 in FY2022, #11 in FY2023 and #72 in FY2024; up 46 since FY2024.
27	Republic Services Inc. 68 awardees, including Environmental, Safety & Health Consulting Services, Inc., ACV Environmental Services Inc. and US Ecology Alaska LLC Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) Army (Department of the Army)	$51,037,966	0.4%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2024; up 21 since FY2024.
28	Hgl-Aptim Technologies JV LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$47,322,880	0.3%	Rank history: not on the FY2021–FY2024 lists; up 321 since FY2024.
29	Oneida Environmental, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$41,732,823	0.3%	Rank history: not on the FY2021–FY2024 lists; up 141 since FY2024.
30	Kituwah Services, LLC Top agencies Army (Department of the Army)	$41,609,613	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
31	Inmar, Inc. Through Inmar RX Solutions Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$41,439,345	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
32	Calista Corp 6 awardees, including Brice Engineering, LLC, Brice Integrated LLC and Brice Solutions, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOT (Department of Transportation)	$41,275,632	0.3%	Rank history: #45 in FY2021, #51 in FY2022 and not on the FY2023–FY2024 lists; up 86 since FY2024.
33	West Valley Cleanup Alliance, LLC Top agencies DOE (Department of Energy)	$40,643,286	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
34	Ch2M Hill, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$37,488,090	0.3%	Rank history: not on the FY2021 list, #29 in FY2022, not on the FY2023 list and #30 in FY2024; down 4 since FY2024.
35	Cape Environmental Management Inc. 2 awardees, including Cape Remediation, LLC Top agencies EPA (Environmental Protection Agency) USAF (Department of the Air Force) Army (Department of the Army)	$37,058,095	0.3%	Rank history: #13 in FY2021, #15 in FY2022, #40 in FY2023 and #51 in FY2024; up 16 since FY2024.
36	Kemron Environmental Services Inc. 3 awardees, including Kemron / Arrowhead JV, LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$31,535,642	0.2%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2024; down 20 since FY2024.
37	Jacobs Engineering Group Inc. 6 awardees, including Jacobs Usae Joint Venture, Jacobs Government Services Company and Ch2M Hill Constructors, Inc. Top agencies EPA (Environmental Protection Agency) DECA (Defense Commissary Agency) Army (Department of the Army)	$30,561,843	0.2%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023 and #28 in FY2024; down 9 since FY2024.
38	Parsons Corporation Through Parsons Government Services Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$30,020,556	0.2%	Rank history: #56 in FY2021, #23 in FY2022, #48 in FY2023 and #67 in FY2024; up 29 since FY2024.
39	Sustainment & Restoration Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$28,051,390	0.2%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2024; up 14 since FY2024.
40	Couvillion Group LLC Top agencies DHS (Department of Homeland Security)	$26,914,727	0.2%	Rank history: #58 in FY2021, #39 in FY2022, #44 in FY2023 and #61 in FY2024; up 21 since FY2024.
41	Southern Ohio Cleanup Company LLC Top agencies DOE (Department of Energy)	$26,751,447	0.2%	Rank history: not on the FY2021–FY2024 lists; up 298 since FY2024.
42	Clean Harbors Inc. 2 awardees, including Clean Harbors Environmental Services Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$25,999,547	0.2%	Rank history: not on the FY2021–FY2023 lists and #87 in FY2024; up 45 since FY2024.
43	Conti Federal Services, LLC Top agencies EPA (Environmental Protection Agency)	$25,535,523	0.2%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2024; up 7 since FY2024.
44	Hgl-Aptim JV LLC Top agencies Army (Department of the Army)	$25,522,568	0.2%	Rank history: #39 in FY2021, #33 in FY2022, #52 in FY2023 and #35 in FY2024; down 9 since FY2024.
45	Bay West LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) GSA (General Services Administration)	$25,150,314	0.2%	Rank history: #84 in FY2021, #83 in FY2022, #50 in FY2023 and #60 in FY2024; up 15 since FY2024.
46	CDM Smith Inc. 2 awardees, including CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency)	$24,773,969	0.2%	Rank history: #35 in FY2021, #22 in FY2022 and not on the FY2023–FY2024 lists; returned.
47	The Aleut Corporation 2 awardees, including Aleut Environmental Remediation, LLC and Aleut Remediation LLC Top agencies Army (Department of the Army)	$23,461,203	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
48	Ahtna Global LLC Top agencies Army (Department of the Army)	$22,679,903	0.2%	Rank history: not on the FY2021–FY2024 lists; up 172 since FY2024.
49	Olgoonik Corporation 2 awardees, including FPM Remediations, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$22,201,185	0.2%	Rank history: #37 in FY2021, not on the FY2022 list, #61 in FY2023 and #56 in FY2024; up 7 since FY2024.
50	Gsia-Parsons JV LLC Top agencies Army (Department of the Army)	$22,190,054	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
51	Ahtna-Brennan JV, LLC Top agencies EPA (Environmental Protection Agency)	$21,315,304	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
52	USA Environmental, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$20,594,509	0.1%	Rank history: #50 in FY2021, #57 in FY2022, #55 in FY2023 and #68 in FY2024; up 16 since FY2024.
53	Cape-Weston JV3 LLC Top agencies Navy (Department of the Navy)	$18,995,444	0.1%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023 and #36 in FY2024; down 17 since FY2024.
54	Leidos Holdings, Inc. Through Leidos, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$18,801,843	0.1%	Rank history: #61 in FY2021, #62 in FY2022, #74 in FY2023 and not on the FY2024 list; up 72 since FY2024.
55	Hamilton Alliance Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) DOJ (Department of Justice)	$18,539,096	0.1%	Rank history: #57 in FY2021, #61 in FY2022, #63 in FY2023 and #62 in FY2024; up 7 since FY2024.
56	Professional Project Services, Inc. 2 awardees, including Enterprise Technical Assistance Services Inc. Top agencies DOE (Department of Energy)	$18,155,797	0.1%	Rank history: #79 in FY2021, #73 in FY2022, not on the FY2023 list and #92 in FY2024; up 36 since FY2024.
57	Roselin Charitar Top agencies Army (Department of the Army)	$17,501,692	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
58	Cherokee Nation Red Wing, L.L.C. Through Cherokee Strategic Solutions, L.L.C. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$17,407,418	0.1%	Rank history: not on the FY2021–FY2024 lists; up 50 since FY2024.
59	Arrowhead Contracting, LLC Top agencies EPA (Environmental Protection Agency)	$17,181,032	0.1%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2023 and not on the FY2024 list; up 107 since FY2024.
60	Ahtna Target JV, LLC Top agencies NASA (National Aeronautics and Space Administration)	$15,129,755	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
61	Dawson Solutions LLC Through Laukoa Environmental Solutions, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army) USDA (Department of Agriculture)	$14,588,370	0.1%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023 and #21 in FY2024; down 40 since FY2024.
62	Eastern Shawnee - Bay West JV, LLC Top agencies Army (Department of the Army)	$14,384,119	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
63	Seaon Environmental LLC Top agencies Navy (Department of the Navy)	$14,344,566	0.1%	Rank history: not on the FY2021 list, #91 in FY2022, #91 in FY2023 and #84 in FY2024; up 21 since FY2024.
64	Arcadis U.s., Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$14,155,859	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
65	Energysolutions, LLC 3 awardees, including Energysolutions Services, Inc. Top agencies EPA (Environmental Protection Agency) Navy (Department of the Navy) Army (Department of the Army)	$14,069,118	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
66	Koman Government Solutions LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$13,818,189	0.1%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2024; up 7 since FY2024.
67	Perry Management Corp of South Dakota, L.l.c Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$13,745,349	0.1%	Rank history: #95 in FY2021, #98 in FY2022, not on the FY2023 list and #75 in FY2024; up 8 since FY2024.
68	C & C Environmental Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DOI (Department of the Interior)	$13,623,486	0.1%	Rank history: #85 in FY2021, #100 in FY2022, #96 in FY2023 and #91 in FY2024; up 23 since FY2024.
69	Fpm-Aecom JV1 2 awardees, including Fpm-Aecom JV2 Top agencies Army (Department of the Army) DOE (Department of Energy) USAF (Department of the Air Force)	$12,411,294	0.1%	Rank history: not on the FY2021 list, #71 in FY2022, #27 in FY2023 and #33 in FY2024; down 36 since FY2024.
70	Engineering/Remediation Resources Group Inc. 2 awardees Top agencies Navy (Department of the Navy) Army (Department of the Army) USDA (Department of Agriculture)	$11,807,000	0.1%	Rank history: not on the FY2021–FY2023 lists and #95 in FY2024; up 25 since FY2024.
71	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$11,611,607	0.1%	Rank history: #78 in FY2021, #84 in FY2022 and not on the FY2023–FY2024 lists; up 42 since FY2024.
72	Waste Management Collection and Recycling Inc 93 awardees, including USA Waste of California, Inc., Advanced Disposal Services Solid Waste Southeast Inc. and Waste Management Inc of Florida Top agencies Navy (Department of the Navy) Army (Department of the Army) VA (Department of Veterans Affairs)	$11,381,996	0.1%	Rank history: not on the FY2021–FY2024 lists; up 96 since FY2024.
73	Apex Companies, LLC Through The Source Group, Inc. Top agencies DLA (Defense Logistics Agency)	$11,370,499	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
74	Noreas Environmental Services LLC Top agencies Army (Department of the Army)	$11,267,164	0.1%	Rank history: #82 in FY2021, not on the FY2022 list, #100 in FY2023 and #89 in FY2024; up 15 since FY2024.
75	Oneida Total Integrated Enterprises LLC Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency) Army (Department of the Army)	$11,196,721	0.1%	Rank history: not on the FY2021–FY2023 lists and #83 in FY2024; up 8 since FY2024.
76	Veolia Es Technical Solutions LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) HHS (Department of Health and Human Services)	$11,089,975	0.1%	Rank history: not on the FY2021–FY2024 lists; up 163 since FY2024.
77	Tradebe Environmental Services, LLC 2 awardees, including Tradebe Treatment and Recycling, LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) USDA (Department of Agriculture)	$10,705,497	0.1%	Rank history: not on the FY2021–FY2024 lists; up 114 since FY2024.
78	S&K Mission Support, LLC Top agencies DOE (Department of Energy)	$10,660,401	0.1%	Rank history: not on the FY2021–FY2024 lists; up 86 since FY2024.
79	Environmental Rail Solutions Inc. Top agencies Army (Department of the Army)	$10,605,864	0.1%	Rank history: not on the FY2021 list, #56 in FY2022, #68 in FY2023 and #63 in FY2024; down 16 since FY2024.
80	Triumvirate Environmental, LLC 2 awardees, including West Central Environmental Corp. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$10,511,125	0.1%	Rank history: not on the FY2021–FY2024 lists; up 26 since FY2024.
81	Amentum Technology, Inc. Top agencies Army (Department of the Army)	$10,503,670	0.1%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; down 54 since FY2024.
82	Yamaki Co., Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$10,448,366	0.1%	Rank history: #59 in FY2021, #64 in FY2022, #84 in FY2023 and #98 in FY2024; up 16 since FY2024.
83	Tehama Technical Services, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior)	$10,411,464	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
84	Ahtna Solutions, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) DOT (Department of Transportation)	$10,108,895	0.1%	Rank history: not on the FY2021 list, #75 in FY2022 and not on the FY2023–FY2024 lists; up 26 since FY2024.
85	Neie Medical Waste Services, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) USDA (Department of Agriculture)	$9,972,884	0.1%	Rank history: #75 in FY2021, #82 in FY2022, not on the FY2023 list and #99 in FY2024; up 14 since FY2024.
86	Kurashiki, Co.,Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$9,957,607	0.1%	Rank history: not on the FY2021–FY2024 lists; up 74 since FY2024.
87	Willow Environmental Inc. Top agencies DLA (Defense Logistics Agency)	$9,876,404	0.1%	Rank history: not on the FY2021–FY2024 lists; up 53 since FY2024.
88	Ahtna-Arcadis 8(A) JV, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$9,708,771	0.1%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023 and #55 in FY2024; down 33 since FY2024.
89	Guahan Waste Control, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$9,615,861	0.1%	Rank history: not on the FY2021 list, #76 in FY2022, #66 in FY2023 and #82 in FY2024; down 7 since FY2024.
90	Catawba-Tea, LLC Top agencies DOE (Department of Energy)	$9,280,302	0.1%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023 and #81 in FY2024; down 9 since FY2024.
91	Horizon Environmental Services, Inc. Top agencies DLA (Defense Logistics Agency) DOI (Department of the Interior) DHS (Department of Homeland Security)	$9,185,390	0.1%	Rank history: not on the FY2021–FY2023 lists and #80 in FY2024; down 11 since FY2024.
92	PCI Bhate JV LLC Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency) Army (Department of the Army)	$8,954,353	0.1%	Rank history: not on the FY2021–FY2024 lists; up 62 since FY2024.
93	Pika International Inc. 2 awardees, including Pika-Pirnie JV LLC Top agencies Army (Department of the Army)	$8,785,141	0.1%	Rank history: not on the FY2021–FY2023 lists and #43 in FY2024; down 50 since FY2024.
94	Liberty Disposal Inc. 2 awardees, including Dorado Services, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$8,661,187	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
95	Advant-Edge Solutions of Middle Atlantic Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$8,609,319	0.1%	Rank history: not on the FY2021–FY2024 lists; up 12 since FY2024.
96	LDS Kemron JV 4 LLC Top agencies Army (Department of the Army)	$8,485,821	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
97	Leisnoi Diversified Services, LLC Top agencies EPA (Environmental Protection Agency)	$8,342,628	0.1%	Rank history: #69 in FY2021, #67 in FY2022, #98 in FY2023 and #64 in FY2024; down 33 since FY2024.
98	Aergc JV LLC Top agencies Army (Department of the Army)	$8,326,564	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
99	TRI-State Government Services Inc 2 awardees, including International Precision, Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$8,206,273	0.1%	Rank history: not on the FY2021–FY2024 lists; up 53 since FY2024.
100	Edco Disposal Corp Top agencies Navy (Department of the Navy)	$8,198,618	0.1%	Rank history: not on the FY2021–FY2024 lists; up 47 since FY2024.

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100 of 2,668 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	$6,924,022,554	Amentum Holdings, Inc.
5621 Waste Collection	$4,434,129,213	Ashbritt Inc.
5622 Waste Treatment and Disposal	$1,938,311,939	Hanford Tank Waste Operations & Closure, 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 $13.9 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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 FY2025?

1. Environmental Chemical Corporation ($1.97B), 2. Ashbritt Inc. ($1.83B), 3. Amentum Holdings, Inc. ($1.74B), 4. Savannah River Mission Completion, LLC ($1.06B), 5. Hanford Tank Waste Operations & Closure, LLC ($796M), 6. Fluor Corporation ($427M), 7. Bering Straits Native Corporation ($366M), 8. Bechtel Parsons Blue Grass, A Joint Venture ($289M), 9. Arctic Slope Regional Corporation ($271M), 10. Bechtel Corp ($238M).

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