Top 100 Contractors in NAICS 562: Waste Management and Remediation Services, FY2024

Name: Top 100 Contractors in NAICS 562: Waste Management and Remediation Services, FY2024
Creator: GovTribe

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

The top 10 won 52% of FY2024 NAICS 562 contract dollars

Contract obligations: $10,462,975,206 Net of deobligations, by contracts coded NAICS 562 or a code under it
Contractors: 2,941 Parent companies with an obligation
Largest contractor: Amentum Services, Inc. $1.13 billion, 10.4% 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. 5 awardees, including Washington River Protection Solutions LLC, Central Plateau Cleanup Company, LLC and Amentum Environment & Energy, Inc. Top agencies DOE (Department of Energy) DOT (Department of Transportation) Navy (Department of the Navy)	$1,127,444,019	10.4%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and not on the FY2025 list; unchanged since FY2023.
2	Savannah River Mission Completion, LLC Top agencies DOE (Department of Energy)	$885,649,780	8.1%	Rank history: not on the FY2021 list, #3 in FY2022, #3 in FY2023 and #4 in FY2025; up 1 since FY2023.
3	United Cleanup Oak Ridge LLC Top agencies DOE (Department of Energy)	$592,276,416	5.4%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2023 and #16 in FY2025; up 1 since FY2023.
4	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	5.0%	Rank history: #3 in FY2021, #2 in FY2022, #2 in FY2023 and #10 in FY2025; down 2 since FY2023.
5	Environmental Chemical Corporation 4 awardees, including ECC Constructors LLC and ECC Environmental LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$537,533,311	4.9%	Rank history: #23 in FY2021, #31 in FY2022, #24 in FY2023 and #33 in FY2025; up 19 since FY2023.
6	Fluor Corporation Through Fluor-Bwxt Portsmouth LLC Top agencies DOE (Department of Energy)	$511,503,345	4.7%	Rank history: #2 in FY2021, #4 in FY2022, #5 in FY2023 and #6 in FY2025; down 1 since FY2023.
7	Sevenson Environmental Services, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$454,187,289	4.2%	Rank history: #17 in FY2021, #11 in FY2022, #14 in FY2023 and #12 in FY2025; up 7 since FY2023.
8	Jacobs Engineering Group Inc. 6 awardees, including Idaho Environmental Coalition LLC, Amentum Technology, Inc. and Ch2M Hill, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army) EPA (Environmental Protection Agency)	$440,358,670	4.0%	Rank history: #7 in FY2021, #30 in FY2022, #6 in FY2023 and not on the FY2025 list; down 2 since FY2023.
9	Bechtel Parsons Blue Grass, A Joint Venture Top agencies Army (Department of the Army)	$354,876,038	3.3%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2025; new.
10	HUI Huliau Technology Services LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$216,689,177	2.0%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
11	EA Engineering Science and Technology Inc. PBC 2 awardees Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$215,107,032	2.0%	Rank history: #9 in FY2021, #6 in FY2022, #7 in FY2023 and #17 in FY2025; down 4 since FY2023.
12	Amentum Holdings, Inc. 4 awardees, including Washington River Protection Solutions LLC and Central Plateau Cleanup Company, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy)	$183,166,416	1.7%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2025; new.
13	Hydrogeologic, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$175,949,681	1.6%	Rank history: #8 in FY2021, #8 in FY2022, #8 in FY2023 and #15 in FY2025; down 5 since FY2023.
14	Hanford Laboratory Management and Integration LLC Top agencies DOE (Department of Energy)	$120,000,839	1.1%	Rank history: #24 in FY2021, #14 in FY2022, #16 in FY2023 and #20 in FY2025; up 2 since FY2023.
15	Energy Technology Alliance LLC Top agencies DOE (Department of Energy)	$117,718,826	1.1%	Rank history: not on the FY2021–FY2023 lists and #22 in FY2025; new.
16	Kemron Environmental Services Inc. 3 awardees, including Kemron / Arrowhead JV, LLC and Vrhabilis-Kemron JV, LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$115,216,372	1.1%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2025; up 187 since FY2023.
17	AECOM Technical Services, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$107,863,800	1.0%	Rank history: #81 in FY2021, not on the FY2022–FY2023 lists and #25 in FY2025; returned.
18	RSI Entech, LLC Top agencies DOE (Department of Energy)	$106,859,649	1.0%	Rank history: #15 in FY2021, #10 in FY2022, #13 in FY2023 and not on the FY2025 list; down 5 since FY2023.
19	Idaho Environmental Coalition LLC Top agencies DOE (Department of Energy)	$99,813,459	0.9%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2025; new.
20	Guidehouse Inc. Through Aptim Federal Services, LLC Top agencies EPA (Environmental Protection Agency) DOE (Department of Energy) Army (Department of the Army)	$97,689,107	0.9%	Rank history: not on the FY2021–FY2023 lists and #14 in FY2025; new.
21	Dawson Solutions LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security) USDA (Department of Agriculture)	$94,504,440	0.9%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023 and #65 in FY2025; up 62 since FY2023.
22	North Wind Portage, Inc. Top agencies Army (Department of the Army) DOE (Department of Energy)	$83,235,513	0.8%	Rank history: not on the FY2021 list, #25 in FY2022, not on the FY2023 list and #21 in FY2025; up 85 since FY2023.
23	Tetra Tech, Inc. 10 awardees, including Tetra TECH EC, Inc. Top agencies DOS (Department of State) Army (Department of the Army) EPA (Environmental Protection Agency)	$80,623,054	0.7%	Rank history: #14 in FY2021, #9 in FY2022, #9 in FY2023 and #19 in FY2025; down 14 since FY2023.
24	Navarro Research and Engineering, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army)	$74,385,257	0.7%	Rank history: #12 in FY2021, #18 in FY2022, #22 in FY2023 and #24 in FY2025; down 2 since FY2023.
25	Environmental Restoration LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) DOJ (Department of Justice)	$71,227,228	0.7%	Rank history: #11 in FY2021, #7 in FY2022, #12 in FY2023 and #18 in FY2025; down 13 since FY2023.
26	Leisnoi Diversified-Kemron 8A JV, LLC Top agencies EPA (Environmental Protection Agency)	$66,083,081	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
27	Amentum Technology, Inc. Top agencies Army (Department of the Army)	$64,391,811	0.6%	Rank history: not on the FY2021–FY2023 lists and #82 in FY2025; new.
28	Jacobs Government Services Company 7 awardees, including Ch2M Hill Bwxt West Valley, LLC, Jacobs Engineering Group Inc. and Jacobs Usae Joint Venture Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency) DECA (Defense Commissary Agency)	$60,047,217	0.6%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023 and #39 in FY2025; up 7 since FY2023.
29	Aptim-Amentum Alaska Decommissioning LLC Top agencies Army (Department of the Army)	$58,730,468	0.5%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2023 and not on the FY2025 list; down 8 since FY2023.
30	Ch2M Hill, Inc. Top agencies EPA (Environmental Protection Agency) USAF (Department of the Air Force) Army (Department of the Army)	$56,408,076	0.5%	Rank history: not on the FY2021 list, #29 in FY2022, not on the FY2023 list and #35 in FY2025; up 188 since FY2023.
31	Cook Inlet Region Inc. 6 awardees, including North Wind Portage, Inc., North Wind Construction Services, LLC and North Wind-Ea JV, LLC Top agencies DOE (Department of Energy) DOI (Department of the Interior) Army (Department of the Army)	$50,547,522	0.5%	Rank history: #6 in FY2021, #17 in FY2022, #26 in FY2023 and not on the FY2025 list; down 5 since FY2023.
32	ECC Constructors LLC Top agencies Army (Department of the Army)	$49,479,615	0.5%	Rank history: not on the FY2021–FY2023 lists and #1 in FY2025; new.
33	Fpm-Aecom JV1 2 awardees, including Fpm-Aecom JV2 Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOE (Department of Energy)	$41,214,945	0.4%	Rank history: not on the FY2021 list, #71 in FY2022, #27 in FY2023 and #72 in FY2025; down 6 since FY2023.
34	Paragon Professional Services LLC Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency) Army (Department of the Army)	$37,824,497	0.3%	Rank history: #52 in FY2021, #74 in FY2022, #34 in FY2023 and #26 in FY2025; unchanged since FY2023.
35	Hgl-Aptim JV LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$37,296,027	0.3%	Rank history: #39 in FY2021, #33 in FY2022, #52 in FY2023 and #47 in FY2025; up 17 since FY2023.
36	Cape-Weston JV3 LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$36,456,441	0.3%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023 and #55 in FY2025; up 31 since FY2023.
37	Ch2M Hill Bwxt West Valley, LLC Top agencies DOE (Department of Energy)	$34,205,283	0.3%	Rank history: #10 in FY2021, #12 in FY2022, #15 in FY2023 and not on the FY2025 list; down 22 since FY2023.
38	EQ & CH Remediation Top agencies EPA (Environmental Protection Agency)	$32,786,469	0.3%	Rank history: #63 in FY2021, #80 in FY2022, #79 in FY2023 and not on the FY2025 list; up 41 since FY2023.
39	Enterprise Technical Assistance Services Inc. Top agencies DOE (Department of Energy)	$32,721,436	0.3%	Rank history: #41 in FY2021, #38 in FY2022, #37 in FY2023 and #74 in FY2025; down 2 since FY2023.
40	CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency)	$31,520,978	0.3%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2025; up 80 since FY2023.
41	Inmar Clearing Inc. Through Inmar RX Solutions Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$30,161,808	0.3%	Rank history: not on the FY2021 list, #47 in FY2022, #38 in FY2023 and not on the FY2025 list; down 3 since FY2023.
42	C M C, Inc. Top agencies EPA (Environmental Protection Agency)	$29,861,520	0.3%	Rank history: #66 in FY2021, #32 in FY2022, #29 in FY2023 and not on the FY2025 list; down 13 since FY2023.
43	Pika International Inc. 2 awardees, including Pika-Pirnie JV LLC Top agencies Army (Department of the Army)	$29,033,053	0.3%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2025; up 405 since FY2023.
44	Aerostar Environmental and Construction LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) HHS (Department of Health and Human Services)	$28,804,649	0.3%	Rank history: not on the FY2021 list, #49 in FY2022, #78 in FY2023 and #61 in FY2025; up 34 since FY2023.
45	Environmental Quality Management, Inc. Top agencies EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$26,889,189	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
46	J.f. Brennan Company, Inc. Top agencies EPA (Environmental Protection Agency)	$26,534,443	0.2%	Rank history: not on the FY2021 list, #13 in FY2022, not on the FY2023 list and not on the FY2025 list; up 126 since FY2023.
47	Brice Engineering, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOI (Department of the Interior)	$25,268,114	0.2%	Rank history: #42 in FY2021, #24 in FY2022, #18 in FY2023 and #41 in FY2025; down 29 since FY2023.
48	Republic Services Inc. 62 awardees, including ACV Environmental Services Inc., Allied Waste Transportation Inc. and US Ecology Alaska LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) Navy (Department of the Navy)	$24,337,566	0.2%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2025; up 84 since FY2023.
49	Hgl-Er JV LLC Top agencies Army (Department of the Army)	$24,051,422	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
50	Conti Federal Services, LLC Top agencies EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$23,996,915	0.2%	Rank history: not on the FY2021–FY2023 lists and #46 in FY2025; new.
51	Cape Environmental Management Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$23,613,727	0.2%	Rank history: #13 in FY2021, #15 in FY2022, #40 in FY2023 and #38 in FY2025; down 11 since FY2023.
52	OCH JV Top agencies EPA (Environmental Protection Agency)	$21,889,138	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
53	Sustainment & Restoration Services, LLC Top agencies Army (Department of the Army) DMA (Defense Media Activity) USAF (Department of the Air Force)	$21,396,337	0.2%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2025; new.
54	Nobis Engineering, Inc. Top agencies EPA (Environmental Protection Agency)	$21,358,393	0.2%	Rank history: #64 in FY2021, #59 in FY2022, not on the FY2023 list and not on the FY2025 list; up 153 since FY2023.
55	Ahtna-Arcadis 8(A) JV, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$20,606,413	0.2%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023 and #90 in FY2025; up 20 since FY2023.
56	Olgoonik Corporation Through FPM Remediations, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$20,316,470	0.2%	Rank history: #37 in FY2021, not on the FY2022 list, #61 in FY2023 and #49 in FY2025; up 5 since FY2023.
57	Weston Solutions Holdings, Inc. Through Weston Solutions Inc. Top agencies Army (Department of the Army)	$20,003,803	0.2%	Rank history: not on the FY2021 list, #78 in FY2022, not on the FY2023 list and not on the FY2025 list; up 76 since FY2023.
58	Arctic Slope Regional Corporation 2 awardees, including Environmental Quality Management, Inc. and EQM Services, LLC Top agencies EPA (Environmental Protection Agency)	$19,665,055	0.2%	Rank history: #27 in FY2021, #46 in FY2022, #17 in FY2023 and #9 in FY2025; down 41 since FY2023.
59	ECC Environmental LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$19,204,924	0.2%	Rank history: not on the FY2021–FY2023 lists and #62 in FY2025; new.
60	Bay West LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$18,641,494	0.2%	Rank history: #84 in FY2021, #83 in FY2022, #50 in FY2023 and #48 in FY2025; down 10 since FY2023.
61	Couvillion Group LLC Top agencies DHS (Department of Homeland Security)	$17,500,000	0.2%	Rank history: #58 in FY2021, #39 in FY2022, #44 in FY2023 and #43 in FY2025; down 17 since FY2023.
62	Hamilton Alliance Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) Army (Department of the Army)	$16,869,112	0.2%	Rank history: #57 in FY2021, #61 in FY2022, #63 in FY2023 and #57 in FY2025; up 1 since FY2023.
63	Environmental Rail Solutions Inc. Top agencies Army (Department of the Army)	$16,244,600	0.1%	Rank history: not on the FY2021 list, #56 in FY2022, #68 in FY2023 and #81 in FY2025; up 5 since FY2023.
64	Leisnoi Diversified Services, LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$16,014,806	0.1%	Rank history: #69 in FY2021, #67 in FY2022, #98 in FY2023 and #100 in FY2025; up 34 since FY2023.
65	Sevenson-Usa Environmental Joint Venture II Top agencies Navy (Department of the Navy)	$15,632,668	0.1%	Rank history: not on the FY2021 list, #35 in FY2022, #32 in FY2023 and not on the FY2025 list; down 33 since FY2023.
66	Brice Solutions, LLC Top agencies DOT (Department of Transportation) USAF (Department of the Air Force) Army (Department of the Army)	$15,317,397	0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and not on the FY2025 list; up 14 since FY2023.
67	Parsons Corporation Through Parsons Government Services Inc. Top agencies OSD (Office of the Secretary of Defense) MDA (DOD Missile Defense Agency) Army (Department of the Army)	$15,028,960	0.1%	Rank history: #56 in FY2021, #23 in FY2022, #48 in FY2023 and #40 in FY2025; down 19 since FY2023.
68	USA Environmental, Inc. Top agencies Navy (Department of the Navy)	$14,918,533	0.1%	Rank history: #50 in FY2021, #57 in FY2022, #55 in FY2023 and #54 in FY2025; down 13 since FY2023.
69	Seres-Arcadis SB JV, LLC Top agencies Army (Department of the Army)	$14,430,728	0.1%	Rank history: #89 in FY2021, #97 in FY2022, #77 in FY2023 and not on the FY2025 list; up 8 since FY2023.
70	Cape-Weston JV1 LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$14,231,711	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 187 since FY2023.
71	Enviro-Fix Solutions LLC Top agencies Army (Department of the Army)	$14,048,833	0.1%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2023 and #63 in FY2025; up 15 since FY2023.
72	AECOM 9 awardees, including Amentum Environment & Energy, Inc., URS Group, Inc. and AECOM Technical Services, Inc. Top agencies DOT (Department of Transportation) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$13,985,469	0.1%	Rank history: #4 in FY2021, #5 in FY2022, #11 in FY2023 and not on the FY2025 list; down 61 since FY2023.
73	Koman Government Solutions LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$13,799,777	0.1%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2025; new.
74	Advanced Technologies and Laboratories (Atl) International, Inc. Top agencies HHS (Department of Health and Human Services)	$13,641,795	0.1%	Rank history: #80 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
75	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)	$13,470,611	0.1%	Rank history: #95 in FY2021, #98 in FY2022, not on the FY2023 list and #70 in FY2025; up 28 since FY2023.
76	JFL-WCS Partners LLC Through Waste Control Specialists LLC Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency)	$13,372,988	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 48 since FY2023.
77	Talces JV, LLC Top agencies USAF (Department of the Air Force) DOT (Department of Transportation)	$13,226,397	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 39 since FY2023.
78	Oneida Nation 3 awardees, including Sustainment & Restoration Services, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$13,214,669	0.1%	Rank history: #22 in FY2021, #19 in FY2022, #23 in FY2023 and not on the FY2025 list; down 55 since FY2023.
79	US Ecology, Inc. 6 awardees, including US Ecology Holdings, Inc., NRC Environmental Services Inc. and US Ecology Washington Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$12,937,558	0.1%	Rank history: #46 in FY2021, #42 in FY2022, #56 in FY2023 and not on the FY2025 list; down 23 since FY2023.
80	Horizon Environmental Services, Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$12,424,527	0.1%	Rank history: not on the FY2021–FY2023 lists and #95 in FY2025; up 76 since FY2023.
81	Catawba-Tea, LLC Top agencies DOE (Department of Energy)	$12,396,835	0.1%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023 and #93 in FY2025; down 16 since FY2023.
82	Guahan Waste Control, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$12,143,359	0.1%	Rank history: not on the FY2021 list, #76 in FY2022, #66 in FY2023 and #91 in FY2025; down 16 since FY2023.
83	Oneida Total Integrated Enterprises LLC Top agencies USAF (Department of the Air Force) DOI (Department of the Interior) Army (Department of the Army)	$12,021,086	0.1%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2025; new.
84	Seaon Environmental LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$11,690,801	0.1%	Rank history: not on the FY2021 list, #91 in FY2022, #91 in FY2023 and #67 in FY2025; up 7 since FY2023.
85	EQM Services, LLC Top agencies EPA (Environmental Protection Agency)	$11,666,554	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
86	Charter Contracting Company, LLC Top agencies Army (Department of the Army)	$11,594,969	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
87	Clean Harbors Inc. 2 awardees, including Clean Harbors Environmental Services Inc. and Clean Harbors Caribe, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$11,569,566	0.1%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2025; new.
88	Techlaw Consultants Inc. Top agencies EPA (Environmental Protection Agency)	$11,489,457	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
89	Noreas Environmental Services LLC Top agencies Army (Department of the Army)	$11,353,673	0.1%	Rank history: #82 in FY2021, not on the FY2022 list, #100 in FY2023 and #76 in FY2025; up 11 since FY2023.
90	Cape Remediation, LLC Top agencies EPA (Environmental Protection Agency)	$11,178,533	0.1%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2023 and not on the FY2025 list; down 54 since FY2023.
91	C & C Environmental Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DOI (Department of the Interior)	$10,767,785	0.1%	Rank history: #85 in FY2021, #100 in FY2022, #96 in FY2023 and #71 in FY2025; up 5 since FY2023.
92	Professional Project Services, Inc. Top agencies DOE (Department of Energy)	$10,712,928	0.1%	Rank history: #79 in FY2021, #73 in FY2022, not on the FY2023 list and not on the FY2025 list; up 54 since FY2023.
93	Earth Smart Environmental Solutions LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$10,334,452	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 25 since FY2023.
94	Sued-Muell GMBH & Co. KG Fuer Abfalltransporte UND Sonderabfallbeseitigung Top agencies DLA (Defense Logistics Agency)	$10,016,078	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 65 since FY2023.
95	Engineering/Remediation Resources Group Inc. Top agencies USDA (Department of Agriculture) Navy (Department of the Navy) Army (Department of the Army)	$9,923,590	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
96	Insight-Esi LLC Top agencies Navy (Department of the Navy)	$9,730,304	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 155 since FY2023.
97	CDM Smith Inc 2 awardees, including CDM Federal Programs Corporation and Cape - CDM Smith, A Joint Venture Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$9,712,364	0.1%	Rank history: not on the FY2021–FY2022 lists, #25 in FY2023 and not on the FY2025 list; down 72 since FY2023.
98	Yamaki Co., Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$9,699,874	0.1%	Rank history: #59 in FY2021, #64 in FY2022, #84 in FY2023 and #83 in FY2025; down 14 since FY2023.
99	Neie Medical Waste Services, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) USDA (Department of Agriculture)	$9,644,272	0.1%	Rank history: #75 in FY2021, #82 in FY2022, not on the FY2023 list and #87 in FY2025; up 7 since FY2023.
100	Plexus-Ayuda Joint Venture LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$9,422,182	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.

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Rankings for the codes under NAICS 562

Code	Net obligations	Largest contractor
5629 Remediation and Other Waste Management Services	$7,528,410,435	Savannah River Mission Completion, LLC
5622 Waste Treatment and Disposal	$2,060,643,790	Amentum Services, Inc.
5621 Waste Collection	$873,920,982	Environmental Chemical Corporation

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 $10.9 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. 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 562 contractors in FY2024?

1. Amentum Services, Inc. ($1.13B), 2. Savannah River Mission Completion, LLC ($886M), 3. United Cleanup Oak Ridge LLC ($592M), 4. Bechtel Corp ($546M), 5. Environmental Chemical Corporation ($538M), 6. Fluor Corporation ($512M), 7. Sevenson Environmental Services, Inc. ($454M), 8. Jacobs Engineering Group Inc. ($440M), 9. Bechtel Parsons Blue Grass, A Joint Venture ($355M), 10. HUI Huliau Technology Services LLC ($217M).

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