Top 100 Contractors in NAICS 562112: Hazardous Waste Collection, FY2021

Name: Top 100 Contractors in NAICS 562112: Hazardous Waste Collection, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 56% of FY2021 NAICS 562112 contract dollars

Contract obligations: $57,423,825 Net of deobligations, by contracts coded NAICS 562112
Contractors: 195 Parent companies with an obligation
Largest contractor: Neie Medical Waste Services, LLC $5.69 million, 9.0% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Neie Medical Waste Services, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$5,690,287	9.0%	Rank history: #1 in FY2022, #3 in FY2023, #4 in FY2024 and #3 in FY2025; unchanged since FY2020.
2	Clean Venture Inc. Top agencies HHS (Department of Health and Human Services)	$4,900,828	7.7%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
3	Triumvirate Environmental, LLC Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce) VA (Department of Veterans Affairs)	$4,727,433	7.5%	Rank history: #4 in FY2022, #1 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since FY2020.
4	Earth Smart Environmental Solutions LLC Top agencies VA (Department of Veterans Affairs)	$3,813,064	6.0%	Rank history: #3 in FY2022, #4 in FY2023, #3 in FY2024 and #4 in FY2025; unchanged since FY2020.
5	Landscape Management Systems, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$3,799,052	6.0%	Rank history: #7 in FY2022, #12 in FY2023, #5 in FY2024 and #5 in FY2025; unchanged since FY2020.
6	Pacific Commercial Services, Inc. Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs)	$3,767,124	5.9%	Rank history: #6 in FY2022, #11 in FY2023, #7 in FY2024 and #16 in FY2025; up 6 since FY2020.
7	Perikin Enterprises LLC Top agencies Army (Department of the Army)	$2,401,847	3.8%	Rank history: #10 in FY2022, #5 in FY2023, #13 in FY2024 and #6 in FY2025; up 10 since FY2020.
8	Advant-Edge Solutions of Middle Atlantic Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$2,310,849	3.6%	Rank history: #8 in FY2022, #14 in FY2023, #6 in FY2024 and #10 in FY2025; up 10 since FY2020.
9	Specpro Sustainment and Environmental, LLC Top agencies Army (Department of the Army)	$2,198,160	3.5%	Rank history: #9 in FY2022, #7 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
10	US Ecology, Inc. 4 awardees, including US Ecology Washington Inc. and NRC Environmental Services Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) USDA (Department of Agriculture)	$2,099,605	3.3%	Rank history: #17 in FY2022, #22 in FY2023, #21 in FY2024 and not on the FY2025 list; up 1 since FY2020.
11	Haztrain Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$1,529,882	2.4%	Rank history: #12 in FY2022, #17 in FY2023, #14 in FY2024 and #13 in FY2025; down 1 since FY2020.
12	Grundy Government Services, LLC Top agencies Army (Department of the Army)	$1,308,993	2.1%	Rank history: #13 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
13	Mellor Engineering Inc. Top agencies Army (Department of the Army)	$1,263,549	2.0%	Rank history: #11 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
14	Mabbett & Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$1,244,184	2.0%	Rank history: #15 in FY2022, #8 in FY2023, #12 in FY2024 and #11 in FY2025; unchanged since FY2020.
15	Seres Engineering & Services LLC Top agencies EPA (Environmental Protection Agency) Navy (Department of the Navy) CSOSA (Court Services and Offender Supervision Agency)	$975,994	1.5%	Rank history: #20 in FY2022, #13 in FY2023, #11 in FY2024 and #14 in FY2025; up 18 since FY2020.
16	Environmental Logistics, Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$658,792	1.0%	Rank history: #32 in FY2022, #36 in FY2023, #48 in FY2024 and #37 in FY2025; up 43 since FY2020.
17	Reg Products, LLC Top agencies VA (Department of Veterans Affairs)	$657,922	1.0%	Rank history: #65 in FY2022, #76 in FY2023, #65 in FY2024 and not on the FY2025 list; up 5 since FY2020.
18	Source Environmental Inc. Top agencies Commerce (Department of Commerce) DOJ (Department of Justice) USDA (Department of Agriculture)	$630,617	1.0%	Rank history: #26 in FY2022, #34 in FY2023, #20 in FY2024 and not on the FY2025 list; up 27 since FY2020.
19	Set the Standard, LLC Top agencies VA (Department of Veterans Affairs)	$619,889	1.0%	Rank history: #18 in FY2022, #23 in FY2023, not on the FY2024 list and #17 in FY2025; up 32 since FY2020.
20	Stericycle Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$596,621	0.9%	Rank history: #23 in FY2022, #27 in FY2023, #37 in FY2024 and #19 in FY2025; down 1 since FY2020.
21	Apec Co., Ltd Top agencies Army (Department of the Army)	$565,199	0.9%	Rank history: #22 in FY2022, #32 in FY2023, #47 in FY2024 and #33 in FY2025; up 2 since FY2020.
22	Hamilton Alliance Inc. Top agencies VA (Department of Veterans Affairs)	$504,774	0.8%	Rank history: #25 in FY2022, #25 in FY2023, #17 in FY2024 and #23 in FY2025; up 3 since FY2020.
23	Gruene Shredding LLC Top agencies VA (Department of Veterans Affairs)	$502,800	0.8%	Rank history: #24 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
24	Estrategy Consulting, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$496,589	0.8%	Rank history: #27 in FY2022, #30 in FY2023, #32 in FY2024 and #34 in FY2025; up 11 since FY2020.
25	North State Environmental Top agencies VA (Department of Veterans Affairs)	$481,312	0.8%	Rank history: #21 in FY2022, #26 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
26	Environmental Compliance Consultants, Inc. Top agencies VA (Department of Veterans Affairs)	$426,491	0.7%	Rank history: #47 in FY2022, #21 in FY2023, #19 in FY2024 and #18 in FY2025; up 23 since FY2020.
27	Environmental Restoration LLC Top agencies DOJ (Department of Justice)	$402,412	0.6%	Rank history: #46 in FY2022, #86 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
28	US Hazmat Rentals LLC Top agencies Navy (Department of the Navy)	$401,151	0.6%	Rank history: #86 in FY2022, #38 in FY2023, #33 in FY2024 and #36 in FY2025; down 4 since FY2020.
29	Gulf Supplies & Commercial Services Co. Top agencies USAF (Department of the Air Force)	$386,073	0.6%	Rank history: #28 in FY2022, #33 in FY2023, #34 in FY2024 and #20 in FY2025; down 1 since FY2020.
30	Clean Harbors Inc 4 awardees, including Safety-Kleen Systems, Inc. and Clean Harbors Environmental Services Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior) USAF (Department of the Air Force)	$382,635	0.6%	Rank history: #30 in FY2022, not on the FY2023 list, #46 in FY2024 and #26 in FY2025; down 10 since FY2020.
31	Tridant Solutions, Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$317,853	0.5%	Rank history: #45 in FY2022, #46 in FY2023, #40 in FY2024 and #40 in FY2025; up 1 since FY2020.
32	Gryphon Environmental, LLC Top agencies USAF (Department of the Air Force)	$305,117	0.5%	Rank history: #36 in FY2022, #37 in FY2023, #35 in FY2024 and not on the FY2025 list; down 1 since FY2020.
33	Trilogy Medwaste Southeast LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$274,174	0.4%	Rank history: #31 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; up 143 since FY2020.
34	Auxilio Management Services Top agencies Commerce (Department of Commerce)	$266,428	0.4%	Rank history: not on the FY2022–FY2025 lists; up 44 since FY2020.
35	Energysolutions LLC Through Energysolutions Services Inc. Top agencies Navy (Department of the Navy)	$264,570	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	Environmental and Energy Innovations, LLC Top agencies VA (Department of Veterans Affairs)	$245,849	0.4%	Rank history: #39 in FY2022, #40 in FY2023, #59 in FY2024 and not on the FY2025 list; up 1 since FY2020.
37	CYS Enterprises LLC Top agencies USAF (Department of the Air Force)	$227,242	0.4%	Rank history: #40 in FY2022, #45 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
38	DLD Environmental Services, Inc. Top agencies DOJ (Department of Justice)	$218,491	0.3%	Rank history: #49 in FY2022, not on the FY2023 list, #36 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
39	Rethmann AG & Co. KG Through Remondis Industrie Service Gmbh. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$215,833	0.3%	Rank history: #44 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
40	FG Management Group LLC Top agencies DHS (Department of Homeland Security)	$213,493	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
41	Mirachem LLC Through Crystal Clean, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) Navy (Department of the Navy)	$185,708	0.3%	Rank history: #57 in FY2022, #98 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
42	Heritage Environmental Services Inc. Through Arcwood Environmental, LLC Top agencies DOJ (Department of Justice) Commerce (Department of Commerce)	$184,366	0.3%	Rank history: not on the FY2022 list, #69 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2020.
43	GEO & GEO S.R.L. Top agencies Army (Department of the Army)	$181,145	0.3%	Rank history: #41 in FY2022, #65 in FY2023, #78 in FY2024 and #74 in FY2025; down 5 since FY2020.
44	Containment Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$166,990	0.3%	Rank history: not on the FY2022–FY2025 lists; up 77 since FY2020.
45	Daniels Sharpsmart, Inc. Top agencies VA (Department of Veterans Affairs)	$164,689	0.3%	Rank history: not on the FY2022–FY2025 lists; down 9 since FY2020.
46	Milspec Logistics LLC Top agencies VA (Department of Veterans Affairs)	$152,608	0.2%	Rank history: #63 in FY2022, not on the FY2023–FY2024 lists and #67 in FY2025; up 28 since FY2020.
47	Terrabella Environmental Services Inc. Top agencies VA (Department of Veterans Affairs)	$147,614	0.2%	Rank history: #66 in FY2022, not on the FY2023 list, #53 in FY2024 and #57 in FY2025; new, not ranked in FY2020.
48	Medical Waste Disposal, LLC Top agencies VA (Department of Veterans Affairs)	$143,968	0.2%	Rank history: not on the FY2022–FY2025 lists; down 27 since FY2020.
49	Applied Technology, Inc. Top agencies Navy (Department of the Navy)	$138,296	0.2%	Rank history: not on the FY2022–FY2025 lists; down 40 since FY2020.
50	Environmental Management Services Inc. Top agencies VA (Department of Veterans Affairs)	$131,201	0.2%	Rank history: #19 in FY2022, #29 in FY2023, #24 in FY2024 and #24 in FY2025; up 60 since FY2020.
51	Enviremedial Services, Inc. Top agencies USAF (Department of the Air Force)	$129,295	0.2%	Rank history: #43 in FY2022, #51 in FY2023, #50 in FY2024 and #48 in FY2025; new, not ranked in FY2020.
52	ELR Consultants, LLC Top agencies VA (Department of Veterans Affairs)	$127,176	0.2%	Rank history: #37 in FY2022, #60 in FY2023, #52 in FY2024 and #98 in FY2025; down 9 since FY2020.
53	Best Pots, Inc. Top agencies DOI (Department of the Interior)	$118,370	0.2%	Rank history: #71 in FY2022, #83 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
54	Advanced Environmental Solutions Inc. Top agencies DOJ (Department of Justice)	$104,154	0.2%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
55	Southwest Hazard Control Inc. Top agencies VA (Department of Veterans Affairs)	$97,267	0.2%	Rank history: #53 in FY2022, #55 in FY2023, #72 in FY2024 and #95 in FY2025; up 51 since FY2020.
56	Tepa Express Contracting, LLC Top agencies USAF (Department of the Air Force)	$97,009	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
57	Envirosmart Inc. Top agencies DHS (Department of Homeland Security)	$95,601	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Advanced Chemical Transport LLC Top agencies DOJ (Department of Justice) HHS (Department of Health and Human Services) DOI (Department of the Interior)	$93,007	0.1%	Rank history: not on the FY2022–FY2024 lists and #73 in FY2025; down 11 since FY2020.
59	ENV Services Inc. Top agencies Army (Department of the Army)	$92,051	0.1%	Rank history: #69 in FY2022, not on the FY2023 list, #69 in FY2024 and #97 in FY2025; down 19 since FY2020.
60	Sued-Muell GMBH & Co. KG Fuer Abfalltransporte UND Sonderabfallbeseitigung Top agencies Army (Department of the Army)	$87,993	0.1%	Rank history: #64 in FY2022, #72 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
61	B.s. Environmental, Inc. Top agencies USAF (Department of the Air Force)	$85,493	0.1%	Rank history: not on the FY2022 list, #68 in FY2023, #87 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
62	Medsharps, LLC Top agencies VA (Department of Veterans Affairs)	$85,294	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Computer Discounters, Inc. Through Turtle Wings Inc. Top agencies SSA (Social Security Administration)	$83,033	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
64	Tradebe Treatment and Recycling LLC 2 awardees, including Tradebe Environmental Services, LLC Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$82,682	0.1%	Rank history: #33 in FY2022, #39 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
65	Ueg, Inc. Top agencies DHS (Department of Homeland Security)	$82,513	0.1%	Rank history: #5 in FY2022, #10 in FY2023 and not on the FY2024–FY2025 lists; down 58 since FY2020.
66	AMG Company, Inc. Top agencies HHS (Department of Health and Human Services)	$79,161	0.1%	Rank history: #84 in FY2022, not on the FY2023 list, #64 in FY2024 and not on the FY2025 list; up 14 since FY2020.
67	RON Smith Environmental, Inc. Top agencies VA (Department of Veterans Affairs)	$72,000	0.1%	Rank history: #74 in FY2022, #80 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
68	J3 Enterprise LLC Top agencies DOI (Department of the Interior)	$71,196	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Jones General Contracting, LLC Top agencies VA (Department of Veterans Affairs)	$70,280	0.1%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
70	Bay Cities Refuse Service, Inc. Top agencies Army (Department of the Army)	$69,215	0.1%	Rank history: not on the FY2022–FY2025 lists; down 2 since FY2020.
71	Waste Management, Inc. Through Waste Management of California, Inc. Top agencies USDA (Department of Agriculture)	$69,008	0.1%	Rank history: not on the FY2022–FY2025 lists; up 91 since FY2020.
72	JME Environmental Corp Top agencies GSA (General Services Administration)	$66,147	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Curtis Bay Energy Inc. Top agencies Army (Department of the Army) DOJ (Department of Justice)	$66,080	0.1%	Rank history: not on the FY2022–FY2023 lists, #67 in FY2024 and #69 in FY2025; up 97 since FY2020.
74	Fiber Business Solutions Group Inc. Top agencies DOI (Department of the Interior)	$65,400	0.1%	Rank history: #78 in FY2022, #85 in FY2023, #83 in FY2024 and not on the FY2025 list; down 5 since FY2020.
75	Black Gold Industries Top agencies NASA (National Aeronautics and Space Administration) DOI (Department of the Interior)	$62,744	0.1%	Rank history: #50 in FY2022, #63 in FY2023, #66 in FY2024 and not on the FY2025 list; up 4 since FY2020.
76	Enviroservices & Training Center LLC Top agencies Army (Department of the Army)	$60,143	0.1%	Rank history: not on the FY2022–FY2025 lists; up 13 since FY2020.
77	Okinawa AD Service Co., Ltd. Top agencies Navy (Department of the Navy)	$58,011	0.1%	Rank history: not on the FY2022–FY2025 lists; up 34 since FY2020.
78	Areaka Trading & Logistics Company Top agencies USAF (Department of the Air Force)	$57,000	0.1%	Rank history: #62 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; up 15 since FY2020.
79	Chemical Response & Remediation Contractors, Inc. Top agencies DHS (Department of Homeland Security)	$56,400	0.1%	Rank history: not on the FY2022–FY2025 lists; down 27 since FY2020.
80	Environmental Waste Specialists Inc. Top agencies Navy (Department of the Navy)	$54,986	0.1%	Rank history: #92 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
81	Shumaker Trucking & Excavating Contractors, Inc. Top agencies USAF (Department of the Air Force)	$50,986	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	Healthcare Medical Waste Services, LLC Top agencies USAF (Department of the Air Force)	$50,850	0.1%	Rank history: #79 in FY2022, #87 in FY2023, #95 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
83	Reliable Pharmaceutical Returns, LLC Top agencies DOJ (Department of Justice) USAF (Department of the Air Force)	$50,063	0.1%	Rank history: #34 in FY2022, #47 in FY2023, #54 in FY2024 and not on the FY2025 list; up 54 since FY2020.
84	Williams Sewer & Drain LLC Top agencies Army (Department of the Army)	$49,900	0.1%	Rank history: #83 in FY2022, #88 in FY2023, #90 in FY2024 and #86 in FY2025; down 20 since FY2020.
85	Matrix Waste Systems, Inc. Top agencies HHS (Department of Health and Human Services)	$49,860	0.1%	Rank history: not on the FY2022 list, #70 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
86	West Central Environmental Corp. Top agencies Army (Department of the Army)	$48,619	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Enviro Care Inc. Top agencies DOJ (Department of Justice)	$48,500	0.1%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; up 28 since FY2020.
88	Caribe Hydroblasting Corp Top agencies DOI (Department of the Interior)	$46,638	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	T & M Hazardous Waste Management, LLC Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$44,426	0.1%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
90	C4 Livestock and Products, LLC Top agencies HHS (Department of Health and Human Services)	$43,541	0.1%	Rank history: #91 in FY2022, #95 in FY2023, #62 in FY2024 and #59 in FY2025; down 6 since FY2020.
91	South Bay Sand Blasting and Tank Cleaning, Inc. Top agencies Navy (Department of the Navy)	$43,121	0.1%	Rank history: not on the FY2022–FY2023 lists, #88 in FY2024 and #62 in FY2025; new, not ranked in FY2020.
92	American Integrated Services, Inc. Top agencies DOJ (Department of Justice)	$38,969	0.1%	Rank history: #93 in FY2022, #89 in FY2023, not on the FY2024 list and #64 in FY2025; down 15 since FY2020.
93	Chemtron Corp Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$35,223	0.1%	Rank history: not on the FY2022–FY2025 lists; down 23 since FY2020.
94	Hawaii Bio-Waste Systems Inc. Top agencies Army (Department of the Army)	$34,681	0.1%	Rank history: not on the FY2022–FY2025 lists; up 80 since FY2020.
95	Neie, Inc. Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$34,162	0.1%	Rank history: #70 in FY2022, #93 in FY2023, #76 in FY2024 and #94 in FY2025; down 3 since FY2020.
96	Hunter Pacific Group Top agencies HHS (Department of Health and Human Services)	$34,062	0.1%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
97	Hull's Environmental Services, Inc. Top agencies DOJ (Department of Justice)	$32,421	0.1%	Rank history: not on the FY2022 list, #66 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
98	Protech Fire & Security LLC Top agencies Navy (Department of the Navy)	$32,000	0.1%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
99	CLC Services Inc. Top agencies USAF (Department of the Air Force)	$31,440	<0.1%	Rank history: #88 in FY2022, #24 in FY2023, #31 in FY2024 and #29 in FY2025; new, not ranked in FY2020.
100	Patriot Air Conditioning LLC Top agencies VA (Department of Veterans Affairs)	$31,200	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 195 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 $63.3 million 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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 562112 contractors in FY2021?

1. Neie Medical Waste Services, LLC ($5.69M), 2. Clean Venture Inc. ($4.9M), 3. Triumvirate Environmental, LLC ($4.73M), 4. Earth Smart Environmental Solutions LLC ($3.81M), 5. Landscape Management Systems, Inc. ($3.8M), 6. Pacific Commercial Services, Inc. ($3.77M), 7. Perikin Enterprises LLC ($2.4M), 8. Advant-Edge Solutions of Middle Atlantic Inc. ($2.31M), 9. Specpro Sustainment and Environmental, LLC ($2.2M), 10. US Ecology, Inc. ($2.1M).

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