Top 100 Contractors in NAICS 562211: Hazardous Waste Treatment and Disposal, FY2024

Name: Top 100 Contractors in NAICS 562211: Hazardous Waste Treatment and Disposal, FY2024
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 88% of FY2024 NAICS 562211 contract dollars

Contract obligations: $2,007,573,864 Net of deobligations, by contracts coded NAICS 562211
Contractors: 317 Parent companies with an obligation
Largest contractor: Amentum Services, Inc. $639 million, 31.0% of obligations
Data as of: Oct 14, 2026

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

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Amentum Services, Inc. 2 awardees, including Washington River Protection Solutions LLC Top agencies DOE (Department of Energy)	$638,754,936	31.0%	Rank history: #1 in FY2021, #1 in FY2022, #2 in FY2023 and not on the FY2025 list; up 1 since FY2023.
2	Bechtel Corp 3 awardees, including Bechtel National, Inc. and Bechtel Parsons Blue Grass, A Joint Venture Top agencies Army (Department of the Army)	$545,815,024	26.5%	Rank history: #2 in FY2021, #2 in FY2022, #1 in FY2023 and #3 in FY2025; down 1 since FY2023.
3	Bechtel Parsons Blue Grass, A Joint Venture Top agencies Army (Department of the Army)	$354,876,038	17.2%	Rank history: not on the FY2021–FY2023 lists and #2 in FY2025; new.
4	Amentum Holdings, Inc. 2 awardees, including Washington River Protection Solutions LLC Top agencies DOE (Department of Energy)	$136,304,668	6.6%	Rank history: not on the FY2021–FY2023 lists and #5 in FY2025; new.
5	ECC Constructors LLC Top agencies Army (Department of the Army)	$47,726,648	2.3%	Rank history: not on the FY2021–FY2023 lists and #4 in FY2025; new.
6	Inmar Clearing Inc. Through Inmar RX Solutions Inc. Top agencies HHS (Department of Health and Human Services)	$30,027,808	1.5%	Rank history: #21 in FY2021, #3 in FY2022, #3 in FY2023 and not on the FY2025 list; down 3 since FY2023.
7	Environmental Rail Solutions Inc. Top agencies Army (Department of the Army)	$16,244,600	0.8%	Rank history: #50 in FY2021, #5 in FY2022, #4 in FY2023 and #13 in FY2025; down 3 since FY2023.
8	Clean Harbors Inc. 6 awardees, including Clean Harbors Environmental Services Inc., Safety-Kleen Systems, Inc. and Clean Harbors Caribe, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$15,415,029	0.7%	Rank history: #20 in FY2021, #11 in FY2022, #6 in FY2023 and #9 in FY2025; down 2 since FY2023.
9	Guidehouse Inc. Through Aptim Federal Services, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$14,239,768	0.7%	Rank history: not on the FY2021–FY2023 lists and #8 in FY2025; new.
10	JFL-WCS Partners LLC Through Waste Control Specialists LLC Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency)	$13,372,988	0.6%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2023 and #21 in FY2025; up 4 since FY2023.
11	Horizon Environmental Services, Inc. Top agencies DLA (Defense Logistics Agency)	$12,418,592	0.6%	Rank history: #31 in FY2021, #31 in FY2022, #19 in FY2023 and #16 in FY2025; up 8 since FY2023.
12	US Ecology, Inc. 3 awardees, including US Ecology Holdings, Inc. and NRC Environmental Services Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) DOJ (Department of Justice)	$10,304,239	0.5%	Rank history: #7 in FY2021, #4 in FY2022, #7 in FY2023 and not on the FY2025 list; down 5 since FY2023.
13	Sued-Muell GMBH & Co. KG Fuer Abfalltransporte UND Sonderabfallbeseitigung Top agencies DLA (Defense Logistics Agency)	$10,125,819	0.5%	Rank history: #19 in FY2021, #22 in FY2022, #20 in FY2023 and #18 in FY2025; up 7 since FY2023.
14	Seaon Environmental LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$10,085,104	0.5%	Rank history: #16 in FY2021, #9 in FY2022, #10 in FY2023 and #10 in FY2025; down 4 since FY2023.
15	TRI-State Government Services Inc 2 awardees Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$8,698,044	0.4%	Rank history: #13 in FY2021, #19 in FY2022, #13 in FY2023 and #17 in FY2025; down 2 since FY2023.
16	C & C Environmental Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DOI (Department of the Interior)	$8,284,260	0.4%	Rank history: #15 in FY2021, #10 in FY2022, #12 in FY2023 and #12 in FY2025; down 4 since FY2023.
17	Republic Services Inc. 6 awardees, including EQ Northeast, Inc., Allied Waste Systems, Inc. and US Ecology Alaska LLC Top agencies Army (Department of the Army) Commerce (Department of Commerce) DOJ (Department of Justice)	$7,265,221	0.4%	Rank history: #76 in FY2021, not on the FY2022 list, #83 in FY2023 and #23 in FY2025; up 66 since FY2023.
18	Industrial Waste Utilization, LLC Top agencies DLA (Defense Logistics Agency)	$6,992,647	0.3%	Rank history: #12 in FY2021, #13 in FY2022, #16 in FY2023 and #20 in FY2025; down 2 since FY2023.
19	Energysolutions Services, Inc. Top agencies Navy (Department of the Navy)	$6,847,306	0.3%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2025; new.
20	Black Gold Industries Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$6,539,455	0.3%	Rank history: #11 in FY2021, #14 in FY2022, #17 in FY2023 and #22 in FY2025; down 3 since FY2023.
21	Willow Environmental Inc. Top agencies DLA (Defense Logistics Agency)	$6,438,766	0.3%	Rank history: #17 in FY2021, #23 in FY2022, #18 in FY2023 and #14 in FY2025; down 3 since FY2023.
22	Tradebe Treatment and Recycling LLC 3 awardees, including Tradebe Environmental Services, LLC Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs) EPA (Environmental Protection Agency)	$6,321,952	0.3%	Rank history: #14 in FY2021, #16 in FY2022, #9 in FY2023 and #30 in FY2025; down 13 since FY2023.
23	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)	$4,986,956	0.2%	Rank history: #56 in FY2021, #20 in FY2022, #21 in FY2023 and #24 in FY2025; down 2 since FY2023.
24	Pacific Commercial Services, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DOI (Department of the Interior)	$4,907,351	0.2%	Rank history: #36 in FY2021, #39 in FY2022, #37 in FY2023 and #25 in FY2025; up 13 since FY2023.
25	Bering-Weston JV, LLC Top agencies USAF (Department of the Air Force)	$4,499,000	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
26	Marianas Gas Corp 2 awardees Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$4,361,492	0.2%	Rank history: not on the FY2021 list, #90 in FY2022, #25 in FY2023 and #29 in FY2025; down 1 since FY2023.
27	Tradebe Environmental Services, LLC Top agencies DLA (Defense Logistics Agency) EPA (Environmental Protection Agency) USDA (Department of Agriculture)	$4,194,104	0.2%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2025; new.
28	Veolia Es Technical Solutions LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) DOJ (Department of Justice)	$2,796,166	0.1%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2025; new.
29	J&T Recycling Corporation 2 awardees Top agencies DLA (Defense Logistics Agency)	$2,403,463	0.1%	Rank history: #24 in FY2021, #26 in FY2022, #28 in FY2023 and #31 in FY2025; down 1 since FY2023.
30	Earth Smart Environmental Solutions LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$2,294,685	0.1%	Rank history: #54 in FY2021, #50 in FY2022, #36 in FY2023 and #36 in FY2025; up 6 since FY2023.
31	Tgha Top agencies DOI (Department of the Interior)	$2,090,004	0.1%	Rank history: not on the FY2021–FY2023 lists and #34 in FY2025; new.
32	Energysolutions LLC 2 awardees, including Energysolutions Services, Inc. Top agencies Navy (Department of the Navy)	$2,081,867	0.1%	Rank history: #9 in FY2021, #6 in FY2022, #8 in FY2023 and not on the FY2025 list; down 24 since FY2023.
33	Clean Earth Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$2,042,528	0.1%	Rank history: #45 in FY2021, #38 in FY2022, #34 in FY2023 and #40 in FY2025; up 1 since FY2023.
34	Heritage Environmental Services Inc. Through Arcwood Environmental, LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DOJ (Department of Justice)	$2,010,421	0.1%	Rank history: #25 in FY2021, #17 in FY2022, #29 in FY2023 and not on the FY2025 list; down 5 since FY2023.
35	Arcwood Environmental, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DOJ (Department of Justice)	$2,010,176	0.1%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2025; new.
36	EDM Enterprises, LLC Top agencies VA (Department of Veterans Affairs)	$1,961,620	0.1%	Rank history: #35 in FY2021, #34 in FY2022, #41 in FY2023 and #44 in FY2025; up 5 since FY2023.
37	Perma-Fix Environmental Services, Inc. Top agencies Navy (Department of the Navy)	$1,931,090	0.1%	Rank history: #39 in FY2021, #36 in FY2022, #32 in FY2023 and #43 in FY2025; down 5 since FY2023.
38	AES Asset Acquisition Corporation Top agencies DLA (Defense Logistics Agency)	$1,821,816	0.1%	Rank history: #32 in FY2021, #30 in FY2022, #30 in FY2023 and not on the FY2025 list; down 8 since FY2023.
39	Neie Medical Waste Services, LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$1,700,759	0.1%	Rank history: #34 in FY2021, #27 in FY2022, #26 in FY2023 and #28 in FY2025; down 13 since FY2023.
40	Tet Consulting & Business Management Services, LLC Top agencies DHS (Department of Homeland Security)	$1,644,951	0.1%	Rank history: #46 in FY2021, #41 in FY2022, #40 in FY2023 and not on the FY2025 list; unchanged since FY2023.
41	West Central Environmental Corp. Top agencies DLA (Defense Logistics Agency)	$1,605,336	0.1%	Rank history: #53 in FY2021, #48 in FY2022, #49 in FY2023 and #46 in FY2025; up 8 since FY2023.
42	Relife SPA Through Relife Recycling S.R.L. Top agencies DLA (Defense Logistics Agency)	$1,499,971	0.1%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2023 and #45 in FY2025; up 1 since FY2023.
43	GS Environmental, Inc. Top agencies DLA (Defense Logistics Agency)	$1,492,641	0.1%	Rank history: #29 in FY2021, #33 in FY2022, #54 in FY2023 and #35 in FY2025; up 11 since FY2023.
44	Okinawaken Sangyo Haikibutsushori Cooperative Association Top agencies Navy (Department of the Navy)	$1,400,552	0.1%	Rank history: #42 in FY2021, #43 in FY2022, #45 in FY2023 and #42 in FY2025; up 1 since FY2023.
45	Entsorgungsbetrieb Luzia Francois GMBH Top agencies USAF (Department of the Air Force)	$1,394,922	0.1%	Rank history: #38 in FY2021, #37 in FY2022, #33 in FY2023 and #58 in FY2025; down 12 since FY2023.
46	Applied Technology, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$1,307,850	0.1%	Rank history: not on the FY2021 list, #57 in FY2022, #23 in FY2023 and #59 in FY2025; down 23 since FY2023.
47	NRC Environmental Services Inc. Top agencies DLA (Defense Logistics Agency)	$1,295,891	0.1%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2025; new.
48	Johnsondanforth, Inc. Top agencies VA (Department of Veterans Affairs)	$1,275,371	0.1%	Rank history: #51 in FY2021, #35 in FY2022, #44 in FY2023 and #83 in FY2025; down 4 since FY2023.
49	Tad Environment Top agencies DLA (Defense Logistics Agency)	$1,230,636	0.1%	Rank history: #52 in FY2021, #47 in FY2022, #48 in FY2023 and #67 in FY2025; down 1 since FY2023.
50	Remondis Industrie Service GMBH. Top agencies DLA (Defense Logistics Agency)	$1,103,865	0.1%	Rank history: not on the FY2021–FY2022 lists, #66 in FY2023 and #48 in FY2025; up 16 since FY2023.
51	Best Choice Environmental Inc. Top agencies VA (Department of Veterans Affairs)	$1,101,274	0.1%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023 and #60 in FY2025; up 14 since FY2023.
52	Jfe-K Ryukyu Logistic JV Top agencies DLA (Defense Logistics Agency)	$1,093,678	0.1%	Rank history: #40 in FY2021, #46 in FY2022, #15 in FY2023 and #39 in FY2025; down 37 since FY2023.
53	Kimin Eng Co., Ltd. Top agencies DLA (Defense Logistics Agency)	$1,073,540	0.1%	Rank history: #59 in FY2021, #51 in FY2022, #42 in FY2023 and not on the FY2025 list; down 11 since FY2023.
54	TD Environmental Inc. Top agencies DLA (Defense Logistics Agency)	$1,060,709	0.1%	Rank history: #44 in FY2021, #58 in FY2022, #55 in FY2023 and #52 in FY2025; up 1 since FY2023.
55	Lewis Environmental LLC Top agencies USDA (Department of Agriculture) Army (Department of the Army)	$1,049,119	0.1%	Rank history: not on the FY2021 list, #15 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
56	Veolia Water North America-West LLC 2 awardees, including Veolia Es Technical Solutions LLC and Veolia Es (Uk) Limited Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) EPA (Environmental Protection Agency)	$855,414	<0.1%	Rank history: #27 in FY2021, #32 in FY2022, #27 in FY2023 and not on the FY2025 list; down 29 since FY2023.
57	EWA Direction Inc. Top agencies VA (Department of Veterans Affairs)	$834,404	<0.1%	Rank history: #67 in FY2021, not on the FY2022 list, #99 in FY2023 and #41 in FY2025; up 42 since FY2023.
58	Lincoln Environmental Services, Inc. Top agencies USAF (Department of the Air Force)	$821,224	<0.1%	Rank history: #62 in FY2021, #59 in FY2022, not on the FY2023 list and #55 in FY2025; up 66 since FY2023.
59	Daebo Industrial Co., Ltd. Top agencies Army (Department of the Army)	$818,494	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
60	Kankyo Solution Co. Ltd. Top agencies Navy (Department of the Navy)	$775,501	<0.1%	Rank history: #55 in FY2021, #61 in FY2022, #60 in FY2023 and not on the FY2025 list; unchanged since FY2023.
61	Horizon Environmental Solutions Corporation Top agencies DLA (Defense Logistics Agency)	$770,969	<0.1%	Rank history: #70 in FY2021, #67 in FY2022, #31 in FY2023 and #69 in FY2025; down 30 since FY2023.
62	Onaka Gumi Co.,Ltd. Top agencies DLA (Defense Logistics Agency)	$760,991	<0.1%	Rank history: #65 in FY2021, #60 in FY2022, #72 in FY2023 and #53 in FY2025; up 10 since FY2023.
63	Up-Side Management Co Top agencies Army (Department of the Army)	$733,954	<0.1%	Rank history: #82 in FY2021, #79 in FY2022, #73 in FY2023 and #70 in FY2025; up 10 since FY2023.
64	Auxilio Management Services Top agencies DOI (Department of the Interior)	$728,233	<0.1%	Rank history: #83 in FY2021, #55 in FY2022, #56 in FY2023 and #63 in FY2025; down 8 since FY2023.
65	Broadview Waste Solutions, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$668,435	<0.1%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2023 and #61 in FY2025; down 18 since FY2023.
66	Stericycle Inc Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$649,373	<0.1%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2023 and #50 in FY2025; down 7 since FY2023.
67	Willkom, Inc. Top agencies DLA (Defense Logistics Agency)	$532,246	<0.1%	Rank history: #57 in FY2021, #53 in FY2022, #58 in FY2023 and not on the FY2025 list; down 9 since FY2023.
68	Rad Solutions LLC Top agencies DOI (Department of the Interior) Army (Department of the Army)	$512,629	<0.1%	Rank history: #98 in FY2021, #88 in FY2022, not on the FY2023 list and not on the FY2025 list; up 44 since FY2023.
69	BWX Technologies, Inc. Through Bwxt Nog Technologies, Inc. Top agencies DOE (Department of Energy)	$500,737	<0.1%	Rank history: #69 in FY2021, #68 in FY2022, #64 in FY2023 and #85 in FY2025; down 5 since FY2023.
70	Ncns Environmental, Inc. Top agencies VA (Department of Veterans Affairs)	$464,903	<0.1%	Rank history: #71 in FY2021, #80 in FY2022, #74 in FY2023 and #91 in FY2025; up 4 since FY2023.
71	D'S Ventures, LLC Top agencies USAF (Department of the Air Force)	$425,805	<0.1%	Rank history: not on the FY2021 list, #86 in FY2022, #81 in FY2023 and #94 in FY2025; up 10 since FY2023.
72	Sal Construction Co. Top agencies HHS (Department of Health and Human Services)	$412,740	<0.1%	Rank history: #75 in FY2021, #70 in FY2022, #69 in FY2023 and not on the FY2025 list; down 3 since FY2023.
73	Cherokee Nation Environmental Solutions, L.L.C. Top agencies DLA (Defense Logistics Agency)	$411,009	<0.1%	Rank history: #87 in FY2021, #82 in FY2022, #78 in FY2023 and #72 in FY2025; up 5 since FY2023.
74	Yamaki Co., Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$402,928	<0.1%	Rank history: #68 in FY2021, #64 in FY2022, #62 in FY2023 and not on the FY2025 list; down 12 since FY2023.
75	Veolia ES (UK) Limited Top agencies DLA (Defense Logistics Agency)	$385,867	<0.1%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2025; new.
76	Aptim Federal Services LLC Top agencies Navy (Department of the Navy)	$374,044	<0.1%	Rank history: #33 in FY2021, #7 in FY2022, #5 in FY2023 and not on the FY2025 list; down 71 since FY2023.
77	Plexus Scientific Corporation Top agencies Commerce (Department of Commerce)	$372,718	<0.1%	Rank history: #86 in FY2021, #92 in FY2022, #52 in FY2023 and not on the FY2025 list; down 25 since FY2023.
78	A & A Sheet Metal Products Inc. Top agencies Army (Department of the Army)	$341,762	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
79	OUU Clean Technology K.K. Top agencies USAF (Department of the Air Force)	$340,493	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 154 since FY2023.
80	Hamilton Alliance Inc. Top agencies VA (Department of Veterans Affairs) SSA (Social Security Administration)	$320,127	<0.1%	Rank history: #96 in FY2021, #85 in FY2022, #68 in FY2023 and #79 in FY2025; down 12 since FY2023.
81	Environmental and Energy Innovations, LLC Top agencies VA (Department of Veterans Affairs)	$314,568	<0.1%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2025; new.
82	Verina Consulting Group LLC Top agencies USAF (Department of the Air Force)	$304,230	<0.1%	Rank history: #80 in FY2021, #76 in FY2022, #82 in FY2023 and #75 in FY2025; unchanged since FY2023.
83	Kobakyu, K.K. Top agencies USAF (Department of the Air Force)	$294,152	<0.1%	Rank history: not on the FY2021 list, #74 in FY2022, not on the FY2023 list and #89 in FY2025; up 43 since FY2023.
84	Schrass GMBH Top agencies Army (Department of the Army)	$290,029	<0.1%	Rank history: not on the FY2021 list, #99 in FY2022, not on the FY2023 list and not on the FY2025 list; up 22 since FY2023.
85	Advanced Environmental Solutions Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$272,033	<0.1%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2023 and not on the FY2025 list; up 11 since FY2023.
86	LC Industries Inc. Top agencies Army (Department of the Army)	$262,863	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 203 since FY2023.
87	Akima Global Logistics, LLC Top agencies DHS (Department of Homeland Security)	$261,684	<0.1%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023 and #92 in FY2025; down 10 since FY2023.
88	Triumvirate Environmental, LLC Top agencies Army (Department of the Army)	$235,648	<0.1%	Rank history: #100 in FY2021, #98 in FY2022, not on the FY2023 list and #100 in FY2025; up 16 since FY2023.
89	Sunrise Environmental LLC Top agencies DOJ (Department of Justice)	$225,138	<0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and not on the FY2025 list; up 5 since FY2023.
90	Premier Logistical Center, Inc. Top agencies VA (Department of Veterans Affairs)	$224,000	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
91	I-2-I Solutions, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$216,761	<0.1%	Rank history: not on the FY2021–FY2023 lists and #80 in FY2025; new.
92	Harsco Corporation 3 awardees, including AES Asset Acquisition Corporation and Clean Earth LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$211,271	<0.1%	Rank history: not on the FY2021–FY2023 lists and #33 in FY2025; new.
93	Whitewater Environmental LLC Top agencies USAF (Department of the Air Force)	$209,841	<0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and #74 in FY2025; down 13 since FY2023.
94	ECO Energy Korea Co., Ltd Top agencies DLA (Defense Logistics Agency)	$205,687	<0.1%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2025; new.
95	Waste Management, Inc. Through Reno Disposal Co. Top agencies VA (Department of Veterans Affairs)	$200,815	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
96	Medical Waste Transport Inc. Top agencies HHS (Department of Health and Human Services)	$197,004	<0.1%	Rank history: not on the FY2021 list, #97 in FY2022, not on the FY2023 list and not on the FY2025 list; up 6 since FY2023.
97	Acty Co., Ltd. Top agencies Navy (Department of the Navy)	$182,110	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 194 since FY2023.
98	Set the Standard LLC Top agencies VA (Department of Veterans Affairs)	$179,403	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
99	Reworld Solutions, LLC Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$173,827	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
100	Jim's Tank Service, LLC Top agencies Army (Department of the Army)	$157,149	<0.1%	Rank history: not on the FY2021 list, #69 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.

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100 of 317 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 $2.06 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 FY2024?

1. Amentum Services, Inc. ($639M), 2. Bechtel Corp ($546M), 3. Bechtel Parsons Blue Grass, A Joint Venture ($355M), 4. Amentum Holdings, Inc. ($136M), 5. ECC Constructors LLC ($47.7M), 6. Inmar Clearing Inc. ($30M), 7. Environmental Rail Solutions Inc. ($16.2M), 8. Clean Harbors Inc. ($15.4M), 9. Guidehouse Inc. ($14.2M), 10. JFL-WCS Partners LLC ($13.4M).

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