Top 100 Contractors in NAICS 562211: Hazardous Waste Treatment and Disposal, FY2025

Name: Top 100 Contractors in NAICS 562211: Hazardous Waste Treatment and Disposal, FY2025
Creator: GovTribe

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

The top 10 won 86% of FY2025 NAICS 562211 contract dollars

Contract obligations: $1,885,695,194 Net of deobligations, by contracts coded NAICS 562211
Contractors: 289 Parent companies with an obligation
Largest contractor: Hanford Tank Waste Operations & Closure, LLC $796 million, 40.6% 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	Hanford Tank Waste Operations & Closure, LLC Top agencies DOE (Department of Energy)	$796,035,008	40.6%	Rank history: not on the FY2021–FY2022 lists, #50 in FY2023 and not on the FY2024 list; returned.
2	Bechtel Parsons Blue Grass, A Joint Venture Top agencies Army (Department of the Army)	$289,456,116	14.8%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2024; up 1 since FY2024.
3	Bechtel Corp Through Bechtel National, Inc. Top agencies Army (Department of the Army)	$237,713,874	12.1%	Rank history: #2 in FY2021, #2 in FY2022, #1 in FY2023 and #2 in FY2024; down 1 since FY2024.
4	ECC Constructors LLC Top agencies Army (Department of the Army)	$153,963,776	7.9%	Rank history: not on the FY2021–FY2023 lists and #5 in FY2024; up 1 since FY2024.
5	Amentum Holdings, Inc. 2 awardees, including Washington River Protection Solutions LLC Top agencies DOE (Department of Energy)	$103,065,269	5.3%	Rank history: not on the FY2021–FY2023 lists and #4 in FY2024; down 1 since FY2024.
6	Inmar RX Solutions Inc. Top agencies HHS (Department of Health and Human Services)	$41,250,820	2.1%	Rank history: not on the FY2021–FY2024 lists; new.
7	Aleut Environmental Remediation, LLC Top agencies Army (Department of the Army)	$22,408,328	1.1%	Rank history: not on the FY2021–FY2024 lists; up 128 since FY2024.
8	Guidehouse Inc. Through Aptim Federal Services, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$16,344,395	0.8%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2024; up 1 since FY2024.
9	Clean Harbors Inc. 2 awardees, including Clean Harbors Environmental Services Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$13,275,656	0.7%	Rank history: #20 in FY2021, #11 in FY2022, #6 in FY2023 and #8 in FY2024; down 1 since FY2024.
10	Seaon Environmental LLC Top agencies Navy (Department of the Navy)	$12,434,362	0.6%	Rank history: #16 in FY2021, #9 in FY2022, #10 in FY2023 and #14 in FY2024; up 4 since FY2024.
11	Veolia Es Technical Solutions LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) DOJ (Department of Justice)	$10,936,334	0.6%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2024; up 17 since FY2024.
12	C & C Environmental Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DOI (Department of the Interior)	$10,703,457	0.5%	Rank history: #15 in FY2021, #10 in FY2022, #12 in FY2023 and #16 in FY2024; up 4 since FY2024.
13	Environmental Rail Solutions Inc. Top agencies Army (Department of the Army)	$10,605,864	0.5%	Rank history: #50 in FY2021, #5 in FY2022, #4 in FY2023 and #7 in FY2024; down 6 since FY2024.
14	Willow Environmental Inc. Top agencies DLA (Defense Logistics Agency)	$9,855,727	0.5%	Rank history: #17 in FY2021, #23 in FY2022, #18 in FY2023 and #21 in FY2024; up 7 since FY2024.
15	Energysolutions, LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) DOE (Department of Energy)	$9,817,121	0.5%	Rank history: not on the FY2021–FY2024 lists; up 94 since FY2024.
16	Horizon Environmental Services, Inc. Top agencies DLA (Defense Logistics Agency)	$9,162,640	0.5%	Rank history: #31 in FY2021, #31 in FY2022, #19 in FY2023 and #11 in FY2024; down 5 since FY2024.
17	TRI-State Government Services Inc 2 awardees, including International Precision, Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$8,151,943	0.4%	Rank history: #13 in FY2021, #19 in FY2022, #13 in FY2023 and #15 in FY2024; down 2 since FY2024.
18	Sued-Muell GMBH & Co. KG Fuer Abfalltransporte UND Sonderabfallbeseitigung Top agencies DLA (Defense Logistics Agency)	$7,968,967	0.4%	Rank history: #19 in FY2021, #22 in FY2022, #20 in FY2023 and #13 in FY2024; down 5 since FY2024.
19	Tradebe Environmental Services, LLC Top agencies DLA (Defense Logistics Agency) USDA (Department of Agriculture) EPA (Environmental Protection Agency)	$7,522,638	0.4%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; up 8 since FY2024.
20	Industrial Waste Utilization, LLC Top agencies DLA (Defense Logistics Agency)	$7,080,237	0.4%	Rank history: #12 in FY2021, #13 in FY2022, #16 in FY2023 and #18 in FY2024; down 2 since FY2024.
21	JFL-WCS Partners LLC Through Waste Control Specialists LLC Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency)	$6,635,040	0.3%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2023 and #10 in FY2024; down 11 since FY2024.
22	Black Gold Industries Top agencies DLA (Defense Logistics Agency)	$6,119,631	0.3%	Rank history: #11 in FY2021, #14 in FY2022, #17 in FY2023 and #20 in FY2024; down 2 since FY2024.
23	Republic Services Inc. 5 awardees, including US Ecology Washington Inc. Top agencies Army (Department of the Army) DOE (Department of Energy)	$5,629,659	0.3%	Rank history: #76 in FY2021, not on the FY2022 list, #83 in FY2023 and #17 in FY2024; down 6 since FY2024.
24	Advant-Edge Solutions of Middle Atlantic Inc. Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services) Army (Department of the Army)	$5,293,524	0.3%	Rank history: #56 in FY2021, #20 in FY2022, #21 in FY2023 and #23 in FY2024; down 1 since FY2024.
25	Pacific Commercial Services, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) DOI (Department of the Interior)	$4,163,879	0.2%	Rank history: #36 in FY2021, #39 in FY2022, #37 in FY2023 and #24 in FY2024; down 1 since FY2024.
26	Arcwood Environmental, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DOJ (Department of Justice)	$3,985,539	0.2%	Rank history: not on the FY2021–FY2023 lists and #35 in FY2024; up 9 since FY2024.
27	Energysolutions Services, Inc. 2 awardees Top agencies Navy (Department of the Navy) DOE (Department of Energy)	$3,764,583	0.2%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2024; down 8 since FY2024.
28	Neie Medical Waste Services, LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$3,484,619	0.2%	Rank history: #34 in FY2021, #27 in FY2022, #26 in FY2023 and #39 in FY2024; up 11 since FY2024.
29	Marianas Gas Corp Top agencies DLA (Defense Logistics Agency)	$3,289,152	0.2%	Rank history: not on the FY2021 list, #90 in FY2022, #25 in FY2023 and #26 in FY2024; down 3 since FY2024.
30	Tradebe Treatment and Recycling, LLC Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs)	$3,152,968	0.2%	Rank history: #14 in FY2021, #16 in FY2022, #9 in FY2023 and #22 in FY2024; down 8 since FY2024.
31	J&T Recycling Corporation Top agencies DLA (Defense Logistics Agency)	$2,335,165	0.1%	Rank history: #24 in FY2021, #26 in FY2022, #28 in FY2023 and #29 in FY2024; down 2 since FY2024.
32	NRC Environmental Services Inc. Top agencies DLA (Defense Logistics Agency)	$2,321,822	0.1%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2024; up 15 since FY2024.
33	Harsco Corporation 2 awardees, including AES Asset Acquisition Corporation Top agencies DLA (Defense Logistics Agency)	$2,069,005	0.1%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 59 since FY2024.
34	Tgha Top agencies DOI (Department of the Interior)	$1,999,295	0.1%	Rank history: not on the FY2021–FY2023 lists and #31 in FY2024; down 3 since FY2024.
35	GS Environmental, Inc. Top agencies DLA (Defense Logistics Agency)	$1,988,734	0.1%	Rank history: #29 in FY2021, #33 in FY2022, #54 in FY2023 and #43 in FY2024; up 8 since FY2024.
36	Earth Smart Environmental Solutions LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$1,958,280	0.1%	Rank history: #54 in FY2021, #50 in FY2022, #36 in FY2023 and #30 in FY2024; down 6 since FY2024.
37	Advance Engineering and Construction L.L.C. Top agencies USAF (Department of the Air Force)	$1,831,294	0.1%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023 and not on the FY2024 list; returned.
38	Aim Consulting, LLC Top agencies DHS (Department of Homeland Security)	$1,725,609	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
39	Jfe-K Ryukyu Logistic JV Top agencies DLA (Defense Logistics Agency)	$1,687,481	0.1%	Rank history: #40 in FY2021, #46 in FY2022, #15 in FY2023 and #52 in FY2024; up 13 since FY2024.
40	Clean Earth Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$1,641,611	0.1%	Rank history: #45 in FY2021, #38 in FY2022, #34 in FY2023 and #33 in FY2024; down 7 since FY2024.
41	EWA Direction Inc. Top agencies VA (Department of Veterans Affairs)	$1,554,475	0.1%	Rank history: #67 in FY2021, not on the FY2022 list, #99 in FY2023 and #57 in FY2024; up 16 since FY2024.
42	Okinawaken Sangyo Haikibutsushori Cooperative Association Top agencies Navy (Department of the Navy)	$1,548,499	0.1%	Rank history: #42 in FY2021, #43 in FY2022, #45 in FY2023 and #44 in FY2024; up 2 since FY2024.
43	Perma-Fix Environmental Services, Inc. Top agencies Navy (Department of the Navy)	$1,442,189	0.1%	Rank history: #39 in FY2021, #36 in FY2022, #32 in FY2023 and #37 in FY2024; down 6 since FY2024.
44	EDM Enterprises, LLC Top agencies VA (Department of Veterans Affairs)	$1,396,027	0.1%	Rank history: #35 in FY2021, #34 in FY2022, #41 in FY2023 and #36 in FY2024; down 8 since FY2024.
45	Relife SPA Through Relife Recycling S.R.L. Top agencies DLA (Defense Logistics Agency)	$1,331,463	0.1%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2023 and #42 in FY2024; down 3 since FY2024.
46	West Central Environmental Corp. Top agencies DLA (Defense Logistics Agency)	$1,220,678	0.1%	Rank history: #53 in FY2021, #48 in FY2022, #49 in FY2023 and #41 in FY2024; down 5 since FY2024.
47	ECO Energy Korea Co., Ltd Top agencies DLA (Defense Logistics Agency)	$1,186,628	0.1%	Rank history: not on the FY2021–FY2023 lists and #94 in FY2024; up 47 since FY2024.
48	Remondis Industrie Service GMBH. Top agencies DLA (Defense Logistics Agency)	$1,146,630	0.1%	Rank history: not on the FY2021–FY2022 lists, #66 in FY2023 and #50 in FY2024; up 2 since FY2024.
49	August Mack Environmental, Inc. Top agencies Army (Department of the Army)	$1,070,961	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
50	Stericycle Inc 2 awardees Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) USAF (Department of the Air Force)	$1,050,490	0.1%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2023 and #66 in FY2024; up 16 since FY2024.
51	Specs Chemical Services, LLC Top agencies Army (Department of the Army)	$1,029,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
52	TD Environmental Inc. Top agencies DLA (Defense Logistics Agency)	$973,778	<0.1%	Rank history: #44 in FY2021, #58 in FY2022, #55 in FY2023 and #54 in FY2024; up 2 since FY2024.
53	Onaka Gumi Co.,Ltd. Top agencies DLA (Defense Logistics Agency)	$971,499	<0.1%	Rank history: #65 in FY2021, #60 in FY2022, #72 in FY2023 and #62 in FY2024; up 9 since FY2024.
54	American Vet Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$929,331	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 68 since FY2024.
55	Lincoln Environmental Services, Inc. Top agencies USAF (Department of the Air Force)	$921,227	<0.1%	Rank history: #62 in FY2021, #59 in FY2022, not on the FY2023 list and #58 in FY2024; up 3 since FY2024.
56	Chenega-Salas O'brien JV, LLC Top agencies Army (Department of the Army)	$865,252	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 49 since FY2024.
57	Kankyo Solution Co.,Ltd Top agencies Navy (Department of the Navy)	$863,083	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
58	Entsorgungsbetrieb Luzia Francois GMBH Top agencies USAF (Department of the Air Force)	$794,387	<0.1%	Rank history: #38 in FY2021, #37 in FY2022, #33 in FY2023 and #45 in FY2024; down 13 since FY2024.
59	Applied Technology, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$787,299	<0.1%	Rank history: not on the FY2021 list, #57 in FY2022, #23 in FY2023 and #46 in FY2024; down 13 since FY2024.
60	Best Choice Environmental Inc. Top agencies VA (Department of Veterans Affairs)	$785,704	<0.1%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023 and #51 in FY2024; down 9 since FY2024.
61	Broadview Waste Solutions, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$780,716	<0.1%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2023 and #65 in FY2024; up 4 since FY2024.
62	Pacific Coast Contracting Group Top agencies VA (Department of Veterans Affairs)	$750,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
63	Auxilio Management Services Top agencies DOI (Department of the Interior)	$742,160	<0.1%	Rank history: #83 in FY2021, #55 in FY2022, #56 in FY2023 and #64 in FY2024; up 1 since FY2024.
64	Veolia ES (UK) Limited Top agencies DLA (Defense Logistics Agency)	$681,924	<0.1%	Rank history: not on the FY2021–FY2023 lists and #75 in FY2024; up 11 since FY2024.
65	Advetage Solutions LLC Top agencies Army (Department of the Army)	$589,565	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 100 since FY2024.
66	North State Environmental Top agencies VA (Department of Veterans Affairs)	$550,385	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
67	Tad Environment Top agencies DLA (Defense Logistics Agency)	$530,870	<0.1%	Rank history: #52 in FY2021, #47 in FY2022, #48 in FY2023 and #49 in FY2024; down 18 since FY2024.
68	Iron Enterprise LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) Army (Department of the Army)	$489,199	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 94 since FY2024.
69	Horizon Environmental Solutions Corporation Top agencies DLA (Defense Logistics Agency)	$482,268	<0.1%	Rank history: #70 in FY2021, #67 in FY2022, #31 in FY2023 and #61 in FY2024; down 8 since FY2024.
70	Up-Side Management Co Top agencies Army (Department of the Army)	$466,439	<0.1%	Rank history: #82 in FY2021, #79 in FY2022, #73 in FY2023 and #63 in FY2024; down 7 since FY2024.
71	Daniels Sharpsmart Inc. Top agencies VA (Department of Veterans Affairs)	$449,340	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
72	Cherokee Nation Environmental Solutions, L.L.C. Top agencies DLA (Defense Logistics Agency)	$428,581	<0.1%	Rank history: #87 in FY2021, #82 in FY2022, #78 in FY2023 and #73 in FY2024; up 1 since FY2024.
73	G.d.o., Inc. Top agencies Army (Department of the Army)	$415,100	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
74	Whitewater Environmental LLC Top agencies USAF (Department of the Air Force)	$407,102	<0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and #93 in FY2024; up 19 since FY2024.
75	Verina Consulting Group LLC Top agencies USAF (Department of the Air Force)	$406,205	<0.1%	Rank history: #80 in FY2021, #76 in FY2022, #82 in FY2023 and #82 in FY2024; up 7 since FY2024.
76	Narcx Solutions Inc. Top agencies DHS (Department of Homeland Security)	$399,997	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
77	Gregory Spells Top agencies USAF (Department of the Air Force)	$364,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
78	Mediwaste Disposal, LLC Top agencies VA (Department of Veterans Affairs)	$335,775	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
79	Hamilton Alliance Inc. Top agencies VA (Department of Veterans Affairs)	$329,625	<0.1%	Rank history: #96 in FY2021, #85 in FY2022, #68 in FY2023 and #80 in FY2024; up 1 since FY2024.
80	I-2-I Solutions, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$320,916	<0.1%	Rank history: not on the FY2021–FY2023 lists and #91 in FY2024; up 11 since FY2024.
81	Environmental and Energy Innovations, LLC Top agencies VA (Department of Veterans Affairs)	$305,840	<0.1%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2024; unchanged since FY2024.
82	H & L Environmental Services, LLC Top agencies HHS (Department of Health and Human Services)	$302,484	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
83	Johnsondanforth, Inc. Top agencies VA (Department of Veterans Affairs)	$278,516	<0.1%	Rank history: #51 in FY2021, #35 in FY2022, #44 in FY2023 and #48 in FY2024; down 35 since FY2024.
84	Golden Heart Waste Management LLC Top agencies Army (Department of the Army)	$260,459	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
85	BWX Technologies, Inc. Through Bwxt Nog Technologies, Inc. Top agencies DOE (Department of Energy)	$250,369	<0.1%	Rank history: #69 in FY2021, #68 in FY2022, #64 in FY2023 and #69 in FY2024; down 16 since FY2024.
86	American Wholesale Solutions LLC Top agencies HHS (Department of Health and Human Services)	$247,543	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 42 since FY2024.
87	B&M Construction Inc. Top agencies VA (Department of Veterans Affairs)	$246,706	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
88	Asahi General Trading and Contracting Co. WLL Top agencies DLA (Defense Logistics Agency)	$245,994	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 22 since FY2024.
89	Kobakyu, K.K. Top agencies USAF (Department of the Air Force)	$240,029	<0.1%	Rank history: not on the FY2021 list, #74 in FY2022, not on the FY2023 list and #83 in FY2024; down 6 since FY2024.
90	Environmental Management Services Inc. Top agencies EPA (Environmental Protection Agency)	$230,016	<0.1%	Rank history: #88 in FY2021 and not on the FY2022–FY2024 lists; up 139 since FY2024.
91	Ncns Environmental, Inc. Top agencies VA (Department of Veterans Affairs)	$222,145	<0.1%	Rank history: #71 in FY2021, #80 in FY2022, #74 in FY2023 and #70 in FY2024; down 21 since FY2024.
92	Akima Global Logistics, LLC Top agencies DHS (Department of Homeland Security)	$221,457	<0.1%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023 and #87 in FY2024; down 5 since FY2024.
93	Terrabella Environmental Services Inc. Top agencies DHS (Department of Homeland Security) DLA (Defense Logistics Agency) Commerce (Department of Commerce)	$213,458	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 9 since FY2024.
94	D'S Ventures, LLC Top agencies USAF (Department of the Air Force)	$212,902	<0.1%	Rank history: not on the FY2021 list, #86 in FY2022, #81 in FY2023 and #71 in FY2024; down 23 since FY2024.
95	Alpha & Omega Repair Service, Inc. Top agencies Army (Department of the Army)	$207,498	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
96	Reworld Holding Corporation Top agencies DOJ (Department of Justice)	$202,034	<0.1%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and not on the FY2024 list; up 62 since FY2024.
97	Waste Management of New Jersey Inc. Through Reno Disposal Co. Top agencies VA (Department of Veterans Affairs)	$200,815	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
98	Environmental Packaging Top agencies Treasury (Department of the Treasury)	$200,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 23 since FY2024.
99	Jalal ALI Ahmed Attief Contracting Establishment Top agencies USAF (Department of the Air Force)	$191,987	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
100	Triumvirate Environmental, LLC Top agencies Army (Department of the Army)	$183,112	<0.1%	Rank history: #100 in FY2021, #98 in FY2022, not on the FY2023 list and #88 in FY2024; down 12 since FY2024.

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100 of 289 contractors listed here. See the rest on GovTribe.

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 $1.96 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 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 562211 contractors in FY2025?

1. Hanford Tank Waste Operations & Closure, LLC ($796M), 2. Bechtel Parsons Blue Grass, A Joint Venture ($289M), 3. Bechtel Corp ($238M), 4. ECC Constructors LLC ($154M), 5. Amentum Holdings, Inc. ($103M), 6. Inmar RX Solutions Inc. ($41.3M), 7. Aleut Environmental Remediation, LLC ($22.4M), 8. Guidehouse Inc. ($16.3M), 9. Clean Harbors Inc. ($13.3M), 10. Seaon Environmental LLC ($12.4M).

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