Top 100 Contractors in NAICS 5622: Waste Treatment and Disposal, FY2022

Name: Top 100 Contractors in NAICS 5622: Waste Treatment and Disposal, FY2022
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2021 – Sep 30, 2022 Code page on GovTribe

The top 10 won 85% of FY2022 NAICS 5622 contract dollars

Contract obligations: $2,021,468,763 Net of deobligations, by contracts coded NAICS 5622 or a code under it
Contractors: 456 Parent companies with an obligation
Largest contractor: Amentum Services, Inc. $918 million, 43.3% 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. 2 awardees, including Washington River Protection Solutions LLC and Savannah River Remediation LLC Top agencies DOE (Department of Energy)	$917,971,763	43.3%	Rank history: #1 in FY2021, #2 in FY2023, #1 in FY2024 and not on the FY2025 list; unchanged since FY2021.
2	Bechtel Corp 2 awardees, including Bechtel National, Inc. and Bechtel Parsons Blue Grass, A Joint Venture Top agencies Army (Department of the Army)	$785,708,753	37.1%	Rank history: #2 in FY2021, #1 in FY2023, #2 in FY2024 and #3 in FY2025; unchanged since FY2021.
3	Inmar Clearing Inc. Through Inmar RX Solutions Inc. Top agencies HHS (Department of Health and Human Services)	$18,024,300	0.9%	Rank history: #23 in FY2021, #3 in FY2023, #6 in FY2024 and not on the FY2025 list; up 20 since FY2021.
4	US Ecology, Inc. 5 awardees, including US Ecology Holdings, Inc., NRC Environmental Services Inc. and US Ecology Washington Inc. Top agencies Army (Department of the Army) USDA (Department of Agriculture) DOE (Department of Energy)	$17,977,566	0.8%	Rank history: #7 in FY2021, #7 in FY2023, #13 in FY2024 and not on the FY2025 list; up 3 since FY2021.
5	Environmental Rail Solutions Inc. Top agencies Army (Department of the Army)	$14,861,756	0.7%	Rank history: #57 in FY2021, #4 in FY2023, #7 in FY2024 and #14 in FY2025; up 52 since FY2021.
6	Energysolutions LLC 2 awardees, including Energysolutions Services, Inc. Top agencies Navy (Department of the Navy) DOE (Department of Energy)	$13,182,566	0.6%	Rank history: #10 in FY2021, #9 in FY2023, #37 in FY2024 and not on the FY2025 list; up 4 since FY2021.
7	Aptim Federal Services LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$10,438,132	0.5%	Rank history: #38 in FY2021, #5 in FY2023 and not on the FY2024–FY2025 lists; up 31 since FY2021.
8	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$9,859,917	0.5%	Rank history: #11 in FY2021, #12 in FY2023, #16 in FY2024 and #11 in FY2025; up 3 since FY2021.
9	Waste Control Specialists LLC Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency)	$9,829,407	0.5%	Rank history: #8 in FY2021, #11 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2021.
10	Inland Service Corporation, LLC Top agencies Army (Department of the Army)	$9,579,292	0.5%	Rank history: #27 in FY2021, #26 in FY2023, #24 in FY2024 and #57 in FY2025; up 17 since FY2021.
11	Seaon Environmental LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$9,223,215	0.4%	Rank history: #18 in FY2021, #8 in FY2023, #12 in FY2024 and #9 in FY2025; up 7 since FY2021.
12	Clean Harbors Inc 4 awardees, including Clean Harbors Environmental Services Inc., Safety-Kleen Systems, Inc. and Clean Harbors Caribe, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$7,395,394	0.3%	Rank history: #19 in FY2021, #6 in FY2023, #8 in FY2024 and #10 in FY2025; up 7 since FY2021.
13	C & C Environmental Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DOI (Department of the Interior)	$7,278,031	0.3%	Rank history: #16 in FY2021, #13 in FY2023, #17 in FY2024 and #13 in FY2025; up 3 since FY2021.
14	San-I-Pak Pacific, Inc. Top agencies VA (Department of Veterans Affairs)	$7,039,687	0.3%	Rank history: #33 in FY2021, #23 in FY2023 and not on the FY2024–FY2025 lists; up 19 since FY2021.
15	Pika International, Inc. Top agencies Army (Department of the Army)	$6,994,845	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 332 since FY2021.
16	Jfe-K Ryukyu Logistic JV Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$6,905,174	0.3%	Rank history: #45 in FY2021, #16 in FY2023, #62 in FY2024 and #45 in FY2025; up 29 since FY2021.
17	Industrial Waste Utilization, LLC Top agencies DLA (Defense Logistics Agency)	$6,843,374	0.3%	Rank history: #14 in FY2021, #17 in FY2023, #19 in FY2024 and #21 in FY2025; down 3 since FY2021.
18	Black Gold Industries Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$6,815,183	0.3%	Rank history: #13 in FY2021, #18 in FY2023, #21 in FY2024 and #23 in FY2025; down 5 since FY2021.
19	Lewis Environmental LLC Top agencies USDA (Department of Agriculture)	$6,712,105	0.3%	Rank history: not on the FY2021 list, not on the FY2023 list, #65 in FY2024 and not on the FY2025 list; new.
20	Tradebe Treatment and Recycling LLC 3 awardees, including Tradebe Environmental Services, LLC Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs) DHS (Department of Homeland Security)	$6,475,053	0.3%	Rank history: #17 in FY2021, #10 in FY2023, #23 in FY2024 and #32 in FY2025; down 3 since FY2021.
21	Heritage Environmental Services Inc. Through Arcwood Environmental, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DOJ (Department of Justice)	$6,125,069	0.3%	Rank history: #28 in FY2021, #33 in FY2023, #40 in FY2024 and not on the FY2025 list; up 7 since FY2021.
22	Tri-State Government Services Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$5,483,136	0.3%	Rank history: #15 in FY2021, #14 in FY2023, #15 in FY2024 and #18 in FY2025; down 7 since FY2021.
23	Advant-Edge Solutions of Middle Atlantic Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$5,136,489	0.2%	Rank history: #70 in FY2021, #22 in FY2023, #25 in FY2024 and #25 in FY2025; up 47 since FY2021.
24	OSC Technical Solutions, LLC Top agencies DOE (Department of Energy)	$4,655,121	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
25	Sued-Muell GMBH & Co. KG Fuer Abfalltransporte UND Sonderabfallbeseitigung Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$4,480,638	0.2%	Rank history: #22 in FY2021, #21 in FY2023, #14 in FY2024 and #19 in FY2025; down 3 since FY2021.
26	Willow Environmental Inc. Top agencies DLA (Defense Logistics Agency)	$4,112,823	0.2%	Rank history: #20 in FY2021, #19 in FY2023, #22 in FY2024 and #15 in FY2025; down 6 since FY2021.
27	Southwest Research Institute Top agencies NRC (Nuclear Regulatory Commission)	$3,776,642	0.2%	Rank history: #25 in FY2021, #47 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2021.
28	Ecosystech JV LLC Top agencies DLA (Defense Logistics Agency)	$3,169,510	0.1%	Rank history: #21 in FY2021, #46 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2021.
29	J&T Recycling Corporation Top agencies DLA (Defense Logistics Agency)	$3,065,873	0.1%	Rank history: #26 in FY2021, #32 in FY2023, #34 in FY2024 and #35 in FY2025; down 3 since FY2021.
30	Neie Medical Waste Services, LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture) USAF (Department of the Air Force)	$2,838,436	0.1%	Rank history: #39 in FY2021, #29 in FY2023, #44 in FY2024 and #30 in FY2025; up 9 since FY2021.
31	K.i. Kogyo Ltd. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$2,670,310	0.1%	Rank history: #46 in FY2021, #93 in FY2023 and not on the FY2024–FY2025 lists; up 15 since FY2021.
32	Areaka Trading & Logistics Company Top agencies USAF (Department of the Air Force)	$2,476,531	0.1%	Rank history: #29 in FY2021, #39 in FY2023, #46 in FY2024 and #42 in FY2025; down 3 since FY2021.
33	Noreas Environmental Services LLC Top agencies Navy (Department of the Navy)	$2,428,766	0.1%	Rank history: #12 in FY2021 and not on the FY2023–FY2025 lists; down 21 since FY2021.
34	Logex System GMBH &Co. KG Through Logex System International GMBH Top agencies DLA (Defense Logistics Agency)	$2,366,357	0.1%	Rank history: #37 in FY2021, #38 in FY2023, #67 in FY2024 and not on the FY2025 list; up 3 since FY2021.
35	Krätz GMBH Top agencies Army (Department of the Army)	$2,226,842	0.1%	Rank history: #53 in FY2021, #37 in FY2023, #32 in FY2024 and #89 in FY2025; up 18 since FY2021.
36	Veolia Water North America-West LLC 3 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)	$2,213,629	0.1%	Rank history: #32 in FY2021, #31 in FY2023, #68 in FY2024 and not on the FY2025 list; down 4 since FY2021.
37	AES Asset Acquisition Corporation Top agencies DLA (Defense Logistics Agency)	$2,212,480	0.1%	Rank history: #36 in FY2021, #34 in FY2023, #43 in FY2024 and not on the FY2025 list; down 1 since FY2021.
38	Horizon Environmental Services, Inc. Top agencies DLA (Defense Logistics Agency)	$2,211,498	0.1%	Rank history: #35 in FY2021, #20 in FY2023, #11 in FY2024 and #17 in FY2025; down 3 since FY2021.
39	GS Environmental, Inc. Top agencies DLA (Defense Logistics Agency)	$2,103,430	0.1%	Rank history: #34 in FY2021, #69 in FY2023, #50 in FY2024 and #40 in FY2025; down 5 since FY2021.
40	EDM Enterprises, LLC Top agencies VA (Department of Veterans Affairs)	$1,800,311	0.1%	Rank history: #40 in FY2021, #49 in FY2023, #41 in FY2024 and #52 in FY2025; unchanged since FY2021.
41	Meadows Cmpg, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$1,754,635	0.1%	Rank history: #52 in FY2021, #52 in FY2023, #33 in FY2024 and #29 in FY2025; up 11 since FY2021.
42	Johnsondanforth, Inc. Top agencies VA (Department of Veterans Affairs)	$1,708,846	0.1%	Rank history: #60 in FY2021, #53 in FY2023, #56 in FY2024 and not on the FY2025 list; up 18 since FY2021.
43	Perma-Fix Environmental Services, Inc. Top agencies Navy (Department of the Navy) DOE (Department of Energy)	$1,702,495	0.1%	Rank history: #44 in FY2021, #40 in FY2023, #42 in FY2024 and #50 in FY2025; up 1 since FY2021.
44	Pacific Commercial Services, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DOI (Department of the Interior)	$1,696,920	0.1%	Rank history: #41 in FY2021, #43 in FY2023, #26 in FY2024 and #26 in FY2025; down 3 since FY2021.
45	Entsorgungsbetrieb Luzia Francois GMBH Top agencies USAF (Department of the Air Force)	$1,647,299	0.1%	Rank history: #43 in FY2021, #41 in FY2023, #53 in FY2024 and #72 in FY2025; down 2 since FY2021.
46	Clean Earth Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$1,646,475	0.1%	Rank history: #51 in FY2021, #42 in FY2023, #38 in FY2024 and #46 in FY2025; up 5 since FY2021.
47	Ecolfer SRL 2 awardees, including Relife Recycling S.R.L. Top agencies DLA (Defense Logistics Agency)	$1,599,545	0.1%	Rank history: #55 in FY2021, #86 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2021.
48	Tet Consulting & Business Management Services, LLC Top agencies DHS (Department of Homeland Security)	$1,596,393	0.1%	Rank history: #54 in FY2021, #48 in FY2023, #45 in FY2024 and not on the FY2025 list; up 6 since FY2021.
49	Veteran Equipment Sales LLC Top agencies Army (Department of the Army)	$1,595,562	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
50	Flightfab, Inc. Top agencies Navy (Department of the Navy)	$1,586,706	0.1%	Rank history: #79 in FY2021, #59 in FY2023, #30 in FY2024 and #37 in FY2025; up 29 since FY2021.
51	Okinawaken Sangyo Haikibutsushori Cooperative Association Top agencies Navy (Department of the Navy)	$1,513,175	0.1%	Rank history: #47 in FY2021, #55 in FY2023, #52 in FY2024 and #48 in FY2025; down 4 since FY2021.
52	Patriot Environmental Services, Inc. Top agencies USDA (Department of Agriculture)	$1,488,541	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
53	Rethmann AG & Co. KG 3 awardees, including Remondis GMBH, Remondis Industrie Service Gmbh. and Refood GMBH & Co. KG Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$1,473,018	0.1%	Rank history: #59 in FY2021, #67 in FY2023, #81 in FY2024 and not on the FY2025 list; up 6 since FY2021.
54	Graham & Associates Inc. Top agencies USAF (Department of the Air Force)	$1,441,284	0.1%	Rank history: #42 in FY2021, #56 in FY2023 and not on the FY2024–FY2025 lists; down 12 since FY2021.
55	Tikigaq Corporation Through Tikigaq Construction, LLC Top agencies Navy (Department of the Navy)	$1,298,188	0.1%	Rank history: #64 in FY2021 and not on the FY2023–FY2025 lists; up 9 since FY2021.
56	Kipp Mickels Equipment, Inc. Top agencies DLA (Defense Logistics Agency)	$1,279,844	0.1%	Rank history: #71 in FY2021, #73 in FY2023, #47 in FY2024 and #51 in FY2025; up 15 since FY2021.
57	ECO Environment Co., Ltd. Top agencies Army (Department of the Army)	$1,164,890	0.1%	Rank history: #62 in FY2021, #30 in FY2023, #51 in FY2024 and #54 in FY2025; up 5 since FY2021.
58	Tad Environment Top agencies DLA (Defense Logistics Agency)	$1,138,803	0.1%	Rank history: #65 in FY2021, #58 in FY2023, #58 in FY2024 and #88 in FY2025; up 7 since FY2021.
59	West Central Environmental Corp. Top agencies DLA (Defense Logistics Agency)	$1,121,060	0.1%	Rank history: #66 in FY2021, #60 in FY2023, #48 in FY2024 and #56 in FY2025; up 7 since FY2021.
60	Hidden Water Inc. Top agencies DLA (Defense Logistics Agency)	$1,098,340	0.1%	Rank history: #83 in FY2021 and not on the FY2023–FY2025 lists; up 23 since FY2021.
61	Earth Smart Environmental Solutions LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$1,071,340	0.1%	Rank history: #67 in FY2021, #45 in FY2023, #35 in FY2024 and #41 in FY2025; up 6 since FY2021.
62	Kimin Eng Co., Ltd. Top agencies DLA (Defense Logistics Agency)	$1,042,095	<0.1%	Rank history: #75 in FY2021, #50 in FY2023, #63 in FY2024 and not on the FY2025 list; up 13 since FY2021.
63	Shimada Shokai Co., Ltd Top agencies DLA (Defense Logistics Agency)	$994,682	<0.1%	Rank history: #48 in FY2021, #63 in FY2023, #66 in FY2024 and #49 in FY2025; down 15 since FY2021.
64	ECO Burn Inc. Through Enercon Systems Inc. Top agencies Army (Department of the Army)	$987,885	<0.1%	Rank history: #9 in FY2021 and not on the FY2023–FY2025 lists; down 55 since FY2021.
65	Guahan Waste Control, Inc. Top agencies DLA (Defense Logistics Agency)	$963,847	<0.1%	Rank history: #63 in FY2021, #54 in FY2023, #57 in FY2024 and #66 in FY2025; down 2 since FY2021.
66	Stericycle Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$925,606	<0.1%	Rank history: #76 in FY2021 and not on the FY2023–FY2025 lists; up 10 since FY2021.
67	Southeastern Public Service Authority of Virginia Top agencies Navy (Department of the Navy)	$878,674	<0.1%	Rank history: #77 in FY2021, #72 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2021.
68	Willkom, Inc. Top agencies DLA (Defense Logistics Agency)	$821,424	<0.1%	Rank history: #72 in FY2021, #76 in FY2023, #87 in FY2024 and not on the FY2025 list; up 4 since FY2021.
69	CHC GP Top agencies Navy (Department of the Navy)	$819,326	<0.1%	Rank history: not on the FY2021 list, #74 in FY2023 and not on the FY2024–FY2025 lists; up 117 since FY2021.
70	Auxilio Management Services Top agencies DOI (Department of the Interior)	$759,526	<0.1%	Rank history: not on the FY2021 list, #71 in FY2023, #77 in FY2024 and #77 in FY2025; up 46 since FY2021.
71	Hepaco LLC Top agencies Navy (Department of the Navy)	$739,151	<0.1%	Rank history: not on the FY2021 list, #89 in FY2023 and not on the FY2024–FY2025 lists; up 285 since FY2021.
72	Applied Technology, Inc. Top agencies Navy (Department of the Navy)	$728,297	<0.1%	Rank history: not on the FY2021 list, #24 in FY2023, #54 in FY2024 and #73 in FY2025; up 77 since FY2021.
73	TD Environmental Inc. Top agencies DLA (Defense Logistics Agency)	$696,694	<0.1%	Rank history: #50 in FY2021, #70 in FY2023, #64 in FY2024 and #63 in FY2025; down 23 since FY2021.
74	Lincoln Environmental Services, Inc. Top agencies USAF (Department of the Air Force)	$674,487	<0.1%	Rank history: #80 in FY2021, not on the FY2023 list, #71 in FY2024 and #67 in FY2025; up 6 since FY2021.
75	Yongma Service Corporation Top agencies Army (Department of the Army)	$666,235	<0.1%	Rank history: #69 in FY2021 and not on the FY2023–FY2025 lists; down 6 since FY2021.
76	The Kippur Corp Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$624,657	<0.1%	Rank history: #98 in FY2021 and not on the FY2023–FY2025 lists; up 22 since FY2021.
77	Republic Services Inc. 11 awardees, including Allied Waste Systems, Inc., Allied Waste Services of North America, LLC and Republic Services of North Carolina LLC Top agencies DOJ (Department of Justice) Army (Department of the Army) DHS (Department of Homeland Security)	$612,999	<0.1%	Rank history: #58 in FY2021, #77 in FY2023, #18 in FY2024 and #24 in FY2025; down 19 since FY2021.
78	Onaka Gumi Co.,Ltd. Top agencies DLA (Defense Logistics Agency)	$596,690	<0.1%	Rank history: #82 in FY2021, not on the FY2023 list, #75 in FY2024 and #64 in FY2025; up 4 since FY2021.
79	Kankyo Solution Co. Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$595,107	<0.1%	Rank history: #68 in FY2021, #83 in FY2023, #73 in FY2024 and not on the FY2025 list; down 11 since FY2021.
80	Enviroserve Inc. Top agencies USAF (Department of the Air Force)	$592,726	<0.1%	Rank history: #74 in FY2021 and not on the FY2023–FY2025 lists; down 6 since FY2021.
81	C2G, Ltd Co. Top agencies DLA (Defense Logistics Agency)	$589,964	<0.1%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #92 in FY2025; up 26 since FY2021.
82	Yamaki Co., Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$584,104	<0.1%	Rank history: #85 in FY2021, #88 in FY2023, #100 in FY2024 and not on the FY2025 list; up 3 since FY2021.
83	Perikin Enterprises LLC Top agencies Army (Department of the Army)	$577,445	<0.1%	Rank history: #89 in FY2021 and not on the FY2023–FY2025 lists; up 6 since FY2021.
84	LMA Venture Capital LLC Top agencies Army (Department of the Army)	$561,305	<0.1%	Rank history: not on the FY2021 list, #81 in FY2023 and not on the FY2024–FY2025 lists; new.
85	Cinka Construction & Consulting Services LLC Top agencies DHS (Department of Homeland Security)	$556,824	<0.1%	Rank history: not on the FY2021 list, #79 in FY2023, #84 in FY2024 and #81 in FY2025; new.
86	Pacific Trans Environmental Services Inc. Top agencies DLA (Defense Logistics Agency)	$551,407	<0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 46 since FY2021.
87	Clean Service Company Limited (0000) Through Clean Service Co., Ltd Top agencies Navy (Department of the Navy)	$547,242	<0.1%	Rank history: not on the FY2021 list, #97 in FY2023 and not on the FY2024–FY2025 lists; new.
88	Integrated Solutions, Inc. Top agencies USAF (Department of the Air Force)	$543,830	<0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
89	Lormar Reclamation Service, LLC Top agencies USAF (Department of the Air Force)	$540,014	<0.1%	Rank history: #90 in FY2021, not on the FY2023 list, #80 in FY2024 and #80 in FY2025; up 1 since FY2021.
90	Anna Lisa Luna Construction, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$528,093	<0.1%	Rank history: #91 in FY2021 and not on the FY2023–FY2025 lists; up 1 since FY2021.
91	Horizon Environmental Solutions Corporation Top agencies DLA (Defense Logistics Agency)	$515,936	<0.1%	Rank history: #97 in FY2021, #36 in FY2023, #74 in FY2024 and #91 in FY2025; up 6 since FY2021.
92	Air Pollution Control Products Inc. Top agencies DOD (Department of Defense)	$513,924	<0.1%	Rank history: #88 in FY2021, #61 in FY2023, #82 in FY2024 and #78 in FY2025; down 4 since FY2021.
93	BWX Technologies, Inc. Through Bwxt Nog Technologies, Inc. Top agencies DOE (Department of Energy)	$476,170	<0.1%	Rank history: #95 in FY2021, #90 in FY2023, #90 in FY2024 and not on the FY2025 list; up 2 since FY2021.
94	Natives of Kodiak, Incorporated Through Koman Government Solutions LLC Top agencies Navy (Department of the Navy)	$437,421	<0.1%	Rank history: #84 in FY2021 and not on the FY2023–FY2025 lists; down 10 since FY2021.
95	Jim's Tank Service, LLC Top agencies Army (Department of the Army)	$436,358	<0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 271 since FY2021.
96	Biofiltro USA Inc. Top agencies DHS (Department of Homeland Security)	$432,804	<0.1%	Rank history: #99 in FY2021, #95 in FY2023, #91 in FY2024 and not on the FY2025 list; up 3 since FY2021.
97	Juan M Banuelos Top agencies DHS (Department of Homeland Security)	$430,773	<0.1%	Rank history: #92 in FY2021 and not on the FY2023–FY2025 lists; down 5 since FY2021.
98	Action Services Corporation Top agencies Army (Department of the Army)	$420,140	<0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
99	Nambu Service Co., Ltd. Top agencies Army (Department of the Army)	$393,440	<0.1%	Rank history: not on the FY2021 list, #68 in FY2023, #94 in FY2024 and #71 in FY2025; up 67 since FY2021.
100	Hamilton Alliance Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) DOI (Department of the Interior)	$392,051	<0.1%	Rank history: not on the FY2021 list, #87 in FY2023, #92 in FY2024 and #58 in FY2025; up 1 since FY2021.

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100 of 456 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 5622

Code	Net obligations	Largest contractor
56221 Waste Treatment and Disposal	$2,021,468,763	Amentum Services, Inc.

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 $2.12 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 2022 ran Oct 1, 2021 – Sep 30, 2022. 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 FY2021. "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 FY2021 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 5622 contractors in FY2022?

1. Amentum Services, Inc. ($918M), 2. Bechtel Corp ($786M), 3. Inmar Clearing Inc. ($18M), 4. US Ecology, Inc. ($18M), 5. Environmental Rail Solutions Inc. ($14.9M), 6. Energysolutions LLC ($13.2M), 7. Aptim Federal Services LLC ($10.4M), 8. Foreign Utility Consolidated Reporting ($9.86M), 9. Waste Control Specialists LLC ($9.83M), 10. Inland Service Corporation, LLC ($9.58M).

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