Top 100 Contractors in NAICS 5622: Waste Treatment and Disposal, FY2023

Name: Top 100 Contractors in NAICS 5622: Waste Treatment and Disposal, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 87% of FY2023 NAICS 5622 contract dollars

Contract obligations: $1,860,438,182 Net of deobligations, by contracts coded NAICS 5622 or a code under it
Contractors: 492 Parent companies with an obligation
Largest contractor: Bechtel Corp $836 million, 43.7% 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	Bechtel Corp 2 awardees, including Bechtel Parsons Blue Grass, A Joint Venture and Bechtel National, Inc. Top agencies Army (Department of the Army)	$836,266,723	43.7%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2024 and #3 in FY2025; up 1 since FY2022.
2	Amentum Services, Inc. 2 awardees, including Washington River Protection Solutions LLC Top agencies DOE (Department of Energy)	$702,757,618	36.7%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2024 and not on the FY2025 list; down 1 since FY2022.
3	Inmar Clearing Inc. Through Inmar RX Solutions Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$29,622,924	1.5%	Rank history: #23 in FY2021, #3 in FY2022, #6 in FY2024 and not on the FY2025 list; unchanged since FY2022.
4	Environmental Rail Solutions Inc. Top agencies Army (Department of the Army)	$14,236,862	0.7%	Rank history: #57 in FY2021, #5 in FY2022, #7 in FY2024 and #14 in FY2025; up 1 since FY2022.
5	Aptim Federal Services LLC 2 awardees Top agencies Navy (Department of the Navy) Army (Department of the Army)	$14,207,214	0.7%	Rank history: #38 in FY2021, #7 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
6	Clean Harbors Inc 4 awardees, including Clean Harbors Environmental Services Inc. and Safety-Kleen Systems, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$13,180,981	0.7%	Rank history: #19 in FY2021, #12 in FY2022, #8 in FY2024 and #10 in FY2025; up 6 since FY2022.
7	US Ecology, Inc. 4 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) DOE (Department of Energy)	$12,501,284	0.7%	Rank history: #7 in FY2021, #4 in FY2022, #13 in FY2024 and not on the FY2025 list; down 3 since FY2022.
8	Seaon Environmental LLC Top agencies Navy (Department of the Navy)	$11,504,805	0.6%	Rank history: #18 in FY2021, #11 in FY2022, #12 in FY2024 and #9 in FY2025; up 3 since FY2022.
9	Energysolutions LLC 2 awardees, including Energysolutions Services, Inc. Top agencies Navy (Department of the Navy) DOE (Department of Energy)	$11,264,671	0.6%	Rank history: #10 in FY2021, #6 in FY2022, #37 in FY2024 and not on the FY2025 list; down 3 since FY2022.
10	Tradebe Treatment and Recycling LLC 2 awardees, including Tradebe Environmental Services, LLC Top agencies DLA (Defense Logistics Agency) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$10,565,543	0.6%	Rank history: #17 in FY2021, #20 in FY2022, #23 in FY2024 and not on the FY2025 list; up 10 since FY2022.
11	Waste Control Specialists LLC Top agencies DOE (Department of Energy)	$8,869,530	0.5%	Rank history: #8 in FY2021, #9 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
12	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$8,617,945	0.5%	Rank history: #11 in FY2021, #8 in FY2022, #16 in FY2024 and #11 in FY2025; down 4 since FY2022.
13	C & C Environmental Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DOI (Department of the Interior)	$7,404,752	0.4%	Rank history: #16 in FY2021, #13 in FY2022, #17 in FY2024 and #13 in FY2025; unchanged since FY2022.
14	Tri-State Government Services Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$7,393,165	0.4%	Rank history: #15 in FY2021, #22 in FY2022, #15 in FY2024 and #18 in FY2025; up 8 since FY2022.
15	JFL-WCS Partners LLC Through Waste Control Specialists LLC Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency)	$7,309,865	0.4%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2024 and #22 in FY2025; new.
16	Jfe-K Ryukyu Logistic JV Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$7,166,196	0.4%	Rank history: #45 in FY2021, #16 in FY2022, #62 in FY2024 and #45 in FY2025; unchanged since FY2022.
17	Industrial Waste Utilization, LLC Top agencies DLA (Defense Logistics Agency)	$6,152,023	0.3%	Rank history: #14 in FY2021, #17 in FY2022, #19 in FY2024 and #21 in FY2025; unchanged since FY2022.
18	Black Gold Industries Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$6,129,071	0.3%	Rank history: #13 in FY2021, #18 in FY2022, #21 in FY2024 and #23 in FY2025; unchanged since FY2022.
19	Willow Environmental Inc. Top agencies DLA (Defense Logistics Agency)	$5,626,666	0.3%	Rank history: #20 in FY2021, #26 in FY2022, #22 in FY2024 and #15 in FY2025; up 7 since FY2022.
20	Horizon Environmental Services, Inc. Top agencies DLA (Defense Logistics Agency)	$5,438,733	0.3%	Rank history: #35 in FY2021, #38 in FY2022, #11 in FY2024 and #17 in FY2025; up 18 since FY2022.
21	Sued-Muell GMBH & Co. KG Fuer Abfalltransporte UND Sonderabfallbeseitigung Top agencies DLA (Defense Logistics Agency)	$5,140,788	0.3%	Rank history: #22 in FY2021, #25 in FY2022, #14 in FY2024 and #19 in FY2025; up 4 since FY2022.
22	Advant-Edge Solutions of Middle Atlantic Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$5,114,793	0.3%	Rank history: #70 in FY2021, #23 in FY2022, #25 in FY2024 and #25 in FY2025; up 1 since FY2022.
23	San-I-Pak Pacific, Inc. Top agencies VA (Department of Veterans Affairs)	$3,714,505	0.2%	Rank history: #33 in FY2021, #14 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
24	Applied Technology, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$3,671,373	0.2%	Rank history: not on the FY2021 list, #72 in FY2022, #54 in FY2024 and #73 in FY2025; up 48 since FY2022.
25	California Marine Cleaning, Inc. 3 awardees, including Washington Marine Cleaning LLC and Hawaii Marine Cleaning LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$3,635,641	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 238 since FY2022.
26	Inland Service Corporation, LLC Top agencies Army (Department of the Army)	$3,389,281	0.2%	Rank history: #27 in FY2021, #10 in FY2022, #24 in FY2024 and #57 in FY2025; down 16 since FY2022.
27	Marianas Gas Corp 2 awardees Top agencies DLA (Defense Logistics Agency)	$3,323,636	0.2%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2024 and #31 in FY2025; up 101 since FY2022.
28	Coho Construction Management LLC Top agencies Army (Department of the Army)	$3,021,258	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
29	Neie Medical Waste Services, LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$2,924,655	0.2%	Rank history: #39 in FY2021, #30 in FY2022, #44 in FY2024 and #30 in FY2025; up 1 since FY2022.
30	ECO Environment Co., Ltd. Top agencies Army (Department of the Army)	$2,826,607	0.1%	Rank history: #62 in FY2021, #57 in FY2022, #51 in FY2024 and #54 in FY2025; up 27 since FY2022.
31	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)	$2,764,788	0.1%	Rank history: #32 in FY2021, #36 in FY2022, #68 in FY2024 and not on the FY2025 list; up 5 since FY2022.
32	J&T Recycling Corporation Top agencies DLA (Defense Logistics Agency)	$2,338,253	0.1%	Rank history: #26 in FY2021, #29 in FY2022, #34 in FY2024 and #35 in FY2025; down 3 since FY2022.
33	Heritage Environmental Services Inc. Through Arcwood Environmental, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) DOJ (Department of Justice)	$2,150,819	0.1%	Rank history: #28 in FY2021, #21 in FY2022, #40 in FY2024 and not on the FY2025 list; down 12 since FY2022.
34	AES Asset Acquisition Corporation Top agencies DLA (Defense Logistics Agency)	$2,112,351	0.1%	Rank history: #36 in FY2021, #37 in FY2022, #43 in FY2024 and not on the FY2025 list; up 3 since FY2022.
35	Enercon Systems Inc. Top agencies Army (Department of the Army)	$2,082,600	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
36	Horizon Environmental Solutions Corporation Top agencies DLA (Defense Logistics Agency)	$2,062,185	0.1%	Rank history: #97 in FY2021, #91 in FY2022, #74 in FY2024 and #91 in FY2025; up 55 since FY2022.
37	Krätz GMBH Top agencies Army (Department of the Army)	$1,980,624	0.1%	Rank history: #53 in FY2021, #35 in FY2022, #32 in FY2024 and #89 in FY2025; down 2 since FY2022.
38	Logex System GMBH &Co. KG Through Logex System International GMBH Top agencies DLA (Defense Logistics Agency)	$1,980,283	0.1%	Rank history: #37 in FY2021, #34 in FY2022, #67 in FY2024 and not on the FY2025 list; down 4 since FY2022.
39	Areaka Trading & Logistics Company Top agencies USAF (Department of the Air Force)	$1,950,494	0.1%	Rank history: #29 in FY2021, #32 in FY2022, #46 in FY2024 and #42 in FY2025; down 7 since FY2022.
40	Perma-Fix Environmental Services, Inc. Top agencies Navy (Department of the Navy) DOE (Department of Energy)	$1,926,267	0.1%	Rank history: #44 in FY2021, #43 in FY2022, #42 in FY2024 and #50 in FY2025; up 3 since FY2022.
41	Entsorgungsbetrieb Luzia Francois GMBH Top agencies USAF (Department of the Air Force)	$1,783,336	0.1%	Rank history: #43 in FY2021, #45 in FY2022, #53 in FY2024 and #72 in FY2025; up 4 since FY2022.
42	Clean Earth Systems, Inc. Top agencies DLA (Defense Logistics Agency)	$1,772,965	0.1%	Rank history: #51 in FY2021, #46 in FY2022, #38 in FY2024 and #46 in FY2025; up 4 since FY2022.
43	Pacific Commercial Services, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$1,762,387	0.1%	Rank history: #41 in FY2021, #44 in FY2022, #26 in FY2024 and #26 in FY2025; up 1 since FY2022.
44	Advance Engineering and Construction L.L.C. Top agencies USAF (Department of the Air Force)	$1,747,859	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #43 in FY2025; new.
45	Earth Smart Environmental Solutions LLC Top agencies VA (Department of Veterans Affairs) EPA (Environmental Protection Agency) USDA (Department of Agriculture)	$1,730,827	0.1%	Rank history: #67 in FY2021, #61 in FY2022, #35 in FY2024 and #41 in FY2025; up 16 since FY2022.
46	Ecosystech JV LLC Top agencies DLA (Defense Logistics Agency)	$1,679,753	0.1%	Rank history: #21 in FY2021, #28 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
47	Southwest Research Institute Top agencies NRC (Nuclear Regulatory Commission)	$1,643,339	0.1%	Rank history: #25 in FY2021, #27 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
48	Tet Consulting & Business Management Services, LLC Top agencies DHS (Department of Homeland Security)	$1,633,897	0.1%	Rank history: #54 in FY2021, #48 in FY2022, #45 in FY2024 and not on the FY2025 list; unchanged since FY2022.
49	EDM Enterprises, LLC Top agencies VA (Department of Veterans Affairs)	$1,604,886	0.1%	Rank history: #40 in FY2021, #40 in FY2022, #41 in FY2024 and #52 in FY2025; down 9 since FY2022.
50	Kimin Eng Co., Ltd. Top agencies DLA (Defense Logistics Agency)	$1,549,586	0.1%	Rank history: #75 in FY2021, #62 in FY2022, #63 in FY2024 and not on the FY2025 list; up 12 since FY2022.
51	Relife SPA Through Relife Recycling S.R.L. Top agencies DLA (Defense Logistics Agency)	$1,491,308	0.1%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2024 and #53 in FY2025; new.
52	Meadows Cmpg, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$1,464,130	0.1%	Rank history: #52 in FY2021, #41 in FY2022, #33 in FY2024 and #29 in FY2025; down 11 since FY2022.
53	Johnsondanforth, Inc. Top agencies VA (Department of Veterans Affairs)	$1,448,883	0.1%	Rank history: #60 in FY2021, #42 in FY2022, #56 in FY2024 and not on the FY2025 list; down 11 since FY2022.
54	Guahan Waste Control, Inc. Top agencies DLA (Defense Logistics Agency)	$1,442,676	0.1%	Rank history: #63 in FY2021, #65 in FY2022, #57 in FY2024 and #66 in FY2025; up 11 since FY2022.
55	Okinawaken Sangyo Haikibutsushori Cooperative Association Top agencies Navy (Department of the Navy)	$1,432,908	0.1%	Rank history: #47 in FY2021, #51 in FY2022, #52 in FY2024 and #48 in FY2025; down 4 since FY2022.
56	Graham & Associates Inc. Top agencies USAF (Department of the Air Force)	$1,420,903	0.1%	Rank history: #42 in FY2021, #54 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
57	Broadview Waste Solutions, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$1,380,662	0.1%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2024 and #75 in FY2025; up 107 since FY2022.
58	Tad Environment Top agencies DLA (Defense Logistics Agency)	$1,357,580	0.1%	Rank history: #65 in FY2021, #58 in FY2022, #58 in FY2024 and #88 in FY2025; unchanged since FY2022.
59	Flightfab, Inc. Top agencies Navy (Department of the Navy)	$1,237,831	0.1%	Rank history: #79 in FY2021, #50 in FY2022, #30 in FY2024 and #37 in FY2025; down 9 since FY2022.
60	West Central Environmental Corp. Top agencies DLA (Defense Logistics Agency)	$1,111,033	0.1%	Rank history: #66 in FY2021, #59 in FY2022, #48 in FY2024 and #56 in FY2025; down 1 since FY2022.
61	Air Pollution Control Products Inc. Top agencies DOD (Department of Defense)	$1,053,538	0.1%	Rank history: #88 in FY2021, #92 in FY2022, #82 in FY2024 and #78 in FY2025; up 31 since FY2022.
62	Hanford Tank Waste Operations & Closure, LLC Top agencies DOE (Department of Energy)	$1,000,000	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #1 in FY2025; new.
63	Shimada Shokai Co., Ltd Top agencies DLA (Defense Logistics Agency)	$969,480	0.1%	Rank history: #48 in FY2021, #63 in FY2022, #66 in FY2024 and #49 in FY2025; unchanged since FY2022.
64	Aaecon General Contracting LLC Top agencies DOI (Department of the Interior)	$968,177	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
65	Plexus Scientific Corporation Top agencies Commerce (Department of Commerce)	$955,619	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 70 since FY2022.
66	Hitz Holdings U.S.a. Inc. Through NAC International Inc. Top agencies USDA (Department of Agriculture)	$945,600	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
67	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)	$848,220	<0.1%	Rank history: #59 in FY2021, #53 in FY2022, #81 in FY2024 and not on the FY2025 list; down 14 since FY2022.
68	Nambu Service Co., Ltd. Top agencies Army (Department of the Army)	$755,344	<0.1%	Rank history: not on the FY2021 list, #99 in FY2022, #94 in FY2024 and #71 in FY2025; up 31 since FY2022.
69	GS Environmental, Inc. Top agencies DLA (Defense Logistics Agency)	$742,711	<0.1%	Rank history: #34 in FY2021, #39 in FY2022, #50 in FY2024 and #40 in FY2025; down 30 since FY2022.
70	TD Environmental Inc. Top agencies DLA (Defense Logistics Agency)	$719,124	<0.1%	Rank history: #50 in FY2021, #73 in FY2022, #64 in FY2024 and #63 in FY2025; up 3 since FY2022.
71	Auxilio Management Services Top agencies DOI (Department of the Interior)	$717,522	<0.1%	Rank history: not on the FY2021 list, #70 in FY2022, #77 in FY2024 and #77 in FY2025; down 1 since FY2022.
72	Southeastern Public Service Authority of Virginia Top agencies Navy (Department of the Navy)	$707,521	<0.1%	Rank history: #77 in FY2021, #67 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
73	Kipp Mickels Equipment, Inc. Top agencies DLA (Defense Logistics Agency)	$683,674	<0.1%	Rank history: #71 in FY2021, #56 in FY2022, #47 in FY2024 and #51 in FY2025; down 17 since FY2022.
74	CHC GP Top agencies Navy (Department of the Navy)	$675,648	<0.1%	Rank history: not on the FY2021 list, #69 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
75	D'S Ventures, LLC Top agencies HHS (Department of Health and Human Services)	$665,042	<0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2024 and not on the FY2025 list; up 48 since FY2022.
76	Willkom, Inc. Top agencies DLA (Defense Logistics Agency)	$626,405	<0.1%	Rank history: #72 in FY2021, #68 in FY2022, #87 in FY2024 and not on the FY2025 list; down 8 since FY2022.
77	Republic Services Inc. 10 awardees, including Allied Waste Services of North America, LLC, Republic Services of North Carolina LLC and Allied Waste Systems, Inc. Top agencies DOJ (Department of Justice) Army (Department of the Army) DOT (Department of Transportation)	$600,133	<0.1%	Rank history: #58 in FY2021, #77 in FY2022, #18 in FY2024 and #24 in FY2025; unchanged since FY2022.
78	Perikin Enterprises LLC Top agencies Army (Department of the Army)	$591,891	<0.1%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2024 and #82 in FY2025; new.
79	Cinka Construction & Consulting Services LLC Top agencies DHS (Department of Homeland Security)	$580,364	<0.1%	Rank history: not on the FY2021 list, #85 in FY2022, #84 in FY2024 and #81 in FY2025; up 6 since FY2022.
80	Reworld Holding Corporation 9 awardees, including Reworld Solutions, LLC, Reworld Alexandria / Arlington, LLC and Reworld Fairfax, LLC Top agencies NARA (National Archives and Records Administration) DOJ (Department of Justice) DOS (Department of State)	$562,979	<0.1%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2024 and not on the FY2025 list; new.
81	LMA Venture Capital LLC Top agencies Army (Department of the Army)	$561,305	<0.1%	Rank history: not on the FY2021 list, #84 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
82	Stericycle Inc Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) HHS (Department of Health and Human Services)	$546,602	<0.1%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2024 and #61 in FY2025; up 213 since FY2022.
83	Kankyo Solution Co. Ltd. Top agencies Navy (Department of the Navy)	$533,216	<0.1%	Rank history: #68 in FY2021, #79 in FY2022, #73 in FY2024 and not on the FY2025 list; down 4 since FY2022.
84	Remondis Industrie Service GMBH. 2 awardees, including Refood GMBH & Co. KG Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$529,015	<0.1%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2024 and #55 in FY2025; new.
85	Firelake Construction Inc. Top agencies USDA (Department of Agriculture)	$513,567	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
86	Ecolfer SRL Through Relife Recycling S.R.L. Top agencies DLA (Defense Logistics Agency)	$508,411	<0.1%	Rank history: #55 in FY2021, #47 in FY2022 and not on the FY2024–FY2025 lists; down 39 since FY2022.
87	Hamilton Alliance Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$499,175	<0.1%	Rank history: not on the FY2021 list, #100 in FY2022, #92 in FY2024 and #58 in FY2025; up 13 since FY2022.
88	Yamaki Co., Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$492,561	<0.1%	Rank history: #85 in FY2021, #82 in FY2022, #100 in FY2024 and not on the FY2025 list; down 6 since FY2022.
89	Hepaco LLC Top agencies Navy (Department of the Navy)	$490,000	<0.1%	Rank history: not on the FY2021 list, #71 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
90	BWX Technologies, Inc. Through Bwxt Nog Technologies, Inc. Top agencies DOE (Department of Energy)	$488,243	<0.1%	Rank history: #95 in FY2021, #93 in FY2022, #90 in FY2024 and not on the FY2025 list; up 3 since FY2022.
91	Best Choice Environmental Inc. Top agencies VA (Department of Veterans Affairs)	$483,022	<0.1%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2024 and #74 in FY2025; new.
92	Hosan Environment Co., Ltd. Top agencies Army (Department of the Army)	$477,217	<0.1%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2024 and not on the FY2025 list; up 29 since FY2022.
93	K.i. Kogyo Ltd. Top agencies Navy (Department of the Navy)	$462,541	<0.1%	Rank history: #46 in FY2021, #31 in FY2022 and not on the FY2024–FY2025 lists; down 62 since FY2022.
94	System High Corporation Top agencies USAF (Department of the Air Force)	$459,000	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 141 since FY2022.
95	Biofiltro USA Inc. Top agencies DHS (Department of Homeland Security)	$441,468	<0.1%	Rank history: #99 in FY2021, #96 in FY2022, #91 in FY2024 and not on the FY2025 list; up 1 since FY2022.
96	Action Services Corp Top agencies Army (Department of the Army)	$429,817	<0.1%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2024 and #95 in FY2025; new.
97	Clean Service Company Limited (0000) Through Clean Service Co., Ltd Top agencies Navy (Department of the Navy)	$397,902	<0.1%	Rank history: not on the FY2021 list, #87 in FY2022 and not on the FY2024–FY2025 lists; down 10 since FY2022.
98	Moleaer Inc. Top agencies USAF (Department of the Air Force)	$395,000	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
99	Sal Construction Co. Top agencies HHS (Department of Health and Human Services)	$394,860	<0.1%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2024 and not on the FY2025 list; up 2 since FY2022.
100	Waste Management, Inc. 15 awardees, including RTS Landfill, Inc., Atlantic Waste Disposal, Inc. and Waste Management of Texas, Inc. Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security) Army (Department of the Army)	$393,931	<0.1%	Rank history: #94 in FY2021, not on the FY2022 list, #69 in FY2024 and not on the FY2025 list; up 2 since FY2022.

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100 of 492 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	$1,860,438,182	Bechtel Corp

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 $1.91 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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 FY2023?

1. Bechtel Corp ($836M), 2. Amentum Services, Inc. ($703M), 3. Inmar Clearing Inc. ($29.6M), 4. Environmental Rail Solutions Inc. ($14.2M), 5. Aptim Federal Services LLC ($14.2M), 6. Clean Harbors Inc ($13.2M), 7. US Ecology, Inc. ($12.5M), 8. Seaon Environmental LLC ($11.5M), 9. Energysolutions LLC ($11.3M), 10. Tradebe Treatment and Recycling LLC ($10.6M).

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