Top 100 Environmental Protection Agency Contractors, Jul 2025–Jun 2026

Name: Top 100 Environmental Protection Agency Contractors, Jul 2025–Jun 2026
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Agency page on GovTribe

The top 10 won 40% of Environmental Protection Agency contract dollars from July 2025 through June 2026

Contract obligations: $1,631,348,187 Net of deobligations, by the Environmental Protection Agency and its offices
Contractors: 751 Parent companies with an obligation
Largest contractor: General Dynamics Corporation $188 million, 9.4% of obligations
Data as of: Oct 19, 2026

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

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	General Dynamics Corporation 3 awardees, including General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top NAICS codes 541512 Computer Systems Design Services 541620 Environmental Consulting Services 541511 Custom Computer Programming Services	$188,073,707	9.4%	Rank history: #1 in FY2021, #3 in FY2022, #1 in FY2023, #2 in FY2024 and #2 in FY2025; up 1 since Jul 2024–Jun 2025.
2	Environmental Restoration LLC Top NAICS codes 562910 Remediation Services	$126,949,121	6.3%	Rank history: #2 in FY2021, #2 in FY2022, #5 in FY2023, #9 in FY2024 and #4 in FY2025; up 11 since Jul 2024–Jun 2025.
3	Salient Crgt, Inc. Top NAICS codes 541512 Computer Systems Design Services	$86,921,606	4.3%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2023, #13 in FY2024 and #6 in FY2025; up 5 since Jul 2024–Jun 2025.
4	Kemron Environmental Services Inc. 2 awardees, including Kemron / Arrowhead JV, LLC Top NAICS codes 562910 Remediation Services	$80,207,168	4.0%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #18 in FY2025; up 7 since Jul 2024–Jun 2025.
5	Eastern Research Group Inc. Top NAICS codes 541620 Environmental Consulting Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541380 Testing Laboratories and Services	$66,853,870	3.3%	Rank history: #7 in FY2021, #6 in FY2022, #7 in FY2023, #4 in FY2024 and #8 in FY2025; up 1 since Jul 2024–Jun 2025.
6	Hydrogeologic, Inc. Top NAICS codes 562910 Remediation Services 541330 Engineering Services	$65,712,880	3.3%	Rank history: #15 in FY2021, #15 in FY2022, #9 in FY2023, #6 in FY2024 and #11 in FY2025; down 1 since Jul 2024–Jun 2025.
7	EA Engineering Science and Technology Inc. PBC Top NAICS codes 562910 Remediation Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$55,866,527	2.8%	Rank history: #5 in FY2021, #1 in FY2022, #3 in FY2023, #3 in FY2024 and #7 in FY2025; down 4 since Jul 2024–Jun 2025.
8	Tehama Technical Services, LLC Top NAICS codes 562910 Remediation Services	$47,573,348	2.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
9	Tetra Tech, Inc. 10 awardees Top NAICS codes 541620 Environmental Consulting Services 562910 Remediation Services 541330 Engineering Services	$41,178,761	2.1%	Rank history: #4 in FY2021, #4 in FY2022, #2 in FY2023, #5 in FY2024 and #9 in FY2025; unchanged since Jul 2024–Jun 2025.
10	Weston Solutions Holdings Inc Through Weston Solutions Inc. Top NAICS codes 541620 Environmental Consulting Services	$36,473,918	1.8%	Rank history: #20 in FY2021, #12 in FY2022, #18 in FY2023, #19 in FY2024 and #5 in FY2025; up 148 since Jul 2024–Jun 2025.
11	CDM Federal Programs Corporation 2 awardees Top NAICS codes 562910 Remediation Services 541330 Engineering Services 541620 Environmental Consulting Services	$31,360,909	1.6%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2023, #14 in FY2024 and #12 in FY2025; up 3 since Jul 2024–Jun 2025.
12	Ch2M Hill, Inc. Top NAICS codes 562910 Remediation Services	$29,877,016	1.5%	Rank history: #62 in FY2021, #17 in FY2022, #100 in FY2023, #11 in FY2024 and #14 in FY2025; up 7 since Jul 2024–Jun 2025.
13	AECOM Technical Services, Inc. Top NAICS codes 562910 Remediation Services 541330 Engineering Services	$24,208,091	1.2%	Rank history: not on the FY2021–FY2023 lists, #8 in FY2024 and #17 in FY2025; down 3 since Jul 2024–Jun 2025.
14	S C & A Inc. Top NAICS codes 541620 Environmental Consulting Services	$22,433,221	1.1%	Rank history: #75 in FY2021, #85 in FY2022, #67 in FY2023, #20 in FY2024 and #15 in FY2025; up 8 since Jul 2024–Jun 2025.
15	Paragon Professional Services LLC 2 awardees Top NAICS codes 562910 Remediation Services	$21,262,735	1.1%	Rank history: not on the FY2021–FY2022 lists, #37 in FY2023, #48 in FY2024 and #21 in FY2025; up 24 since Jul 2024–Jun 2025.
16	CGI Federal Inc. Top NAICS codes 541512 Computer Systems Design Services 541519 Other Computer Related Services 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$20,712,579	1.0%	Rank history: not on the FY2021–FY2023 lists, #29 in FY2024 and #10 in FY2025; down 1 since Jul 2024–Jun 2025.
17	ICF International Inc. Through ICF Incorporated, L.L.C. Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541380 Testing Laboratories and Services 541620 Environmental Consulting Services	$18,878,316	0.9%	Rank history: not on the FY2021–FY2023 lists, #16 in FY2024 and #24 in FY2025; up 3 since Jul 2024–Jun 2025.
18	Systalex Corporation Top NAICS codes 541519 Other Computer Related Services	$17,206,489	0.9%	Rank history: #43 in FY2021, #49 in FY2022, #49 in FY2023, #42 in FY2024 and #41 in FY2025; up 22 since Jul 2024–Jun 2025.
19	The Timken Company Through CGI Federal Inc. Top NAICS codes 541512 Computer Systems Design Services 541519 Other Computer Related Services 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$17,005,104	0.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
20	The Cadmus Group LLC Top NAICS codes 541620 Environmental Consulting Services 541611 Administrative Management and General Management Consulting Services	$16,193,986	0.8%	Rank history: #34 in FY2021, #32 in FY2022, #28 in FY2023, #12 in FY2024 and #34 in FY2025; up 15 since Jul 2024–Jun 2025.
21	Sevenson Environmental Services, Inc. Top NAICS codes 562910 Remediation Services	$16,144,113	0.8%	Rank history: #14 in FY2021, #13 in FY2022, #19 in FY2023, #1 in FY2024 and #1 in FY2025; down 20 since Jul 2024–Jun 2025.
22	Cape Environmental Management Inc. Top NAICS codes 562910 Remediation Services	$15,871,161	0.8%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; up 29 since Jul 2024–Jun 2025.
23	At&T Inc. 3 awardees, including At&T Enterprises, LLC and Att Mobility LLC Top NAICS codes 517110 Wired Telecommunications Carriers 517312 Wireless Telecommunications Carriers (except Satellite) 517112 Wireless Telecommunications Carriers (except Satellite)	$14,630,987	0.7%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; up 20 since Jul 2024–Jun 2025.
24	Dell Technologies Inc. Through Dell Federal Systems L.P Top NAICS codes 511210 Software Publishers	$14,410,555	0.7%	Rank history: not on the FY2021–FY2023 lists, #38 in FY2024 and #23 in FY2025; up 3 since Jul 2024–Jun 2025.
25	Aptim Hdr, LLC Top NAICS codes 562910 Remediation Services	$14,310,240	0.7%	Rank history: not on the FY2021–FY2025 lists; up 195 since Jul 2024–Jun 2025.
26	C M C, Inc. Top NAICS codes 562910 Remediation Services	$14,024,236	0.7%	Rank history: #32 in FY2021, #16 in FY2022, #13 in FY2023, #23 in FY2024 and #51 in FY2025; up 2 since Jul 2024–Jun 2025.
27	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541512 Computer Systems Design Services 541511 Custom Computer Programming Services 541611 Administrative Management and General Management Consulting Services	$13,553,298	0.7%	Rank history: #17 in FY2021, #23 in FY2022, #24 in FY2023, #28 in FY2024 and #28 in FY2025; up 2 since Jul 2024–Jun 2025.
28	Arrowhead Contracting, LLC Top NAICS codes 562910 Remediation Services	$13,197,977	0.7%	Rank history: not on the FY2021–FY2022 lists, #20 in FY2023, #76 in FY2024 and #25 in FY2025; up 27 since Jul 2024–Jun 2025.
29	Jacobs Engineering Group Inc. 2 awardees, including Jacobs Government Services Company Top NAICS codes 562910 Remediation Services 541330 Engineering Services	$13,012,276	0.6%	Rank history: not on the FY2021–FY2023 lists, #37 in FY2024 and #16 in FY2025; down 6 since Jul 2024–Jun 2025.
30	Chenega It Enterprise Services, LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$11,945,638	0.6%	Rank history: #22 in FY2021, #51 in FY2022, #60 in FY2023, #52 in FY2024 and #35 in FY2025; up 83 since Jul 2024–Jun 2025.
31	J.f. Brennan Company, Inc. Top NAICS codes 562910 Remediation Services	$10,481,529	0.5%	Rank history: not on the FY2021 list, #5 in FY2022, #78 in FY2023, #26 in FY2024 and #85 in FY2025; up 77 since Jul 2024–Jun 2025.
32	Hdr, Inc. 2 awardees, including Hdr-Obg A Joint Venture and HDR Aptim LLC Top NAICS codes 541330 Engineering Services 562910 Remediation Services	$10,464,210	0.5%	Rank history: #38 in FY2021, #28 in FY2022, #29 in FY2023, #70 in FY2024 and #40 in FY2025; up 17 since Jul 2024–Jun 2025.
33	WSP USA Solutions Inc Top NAICS codes 541330 Engineering Services	$10,019,249	0.5%	Rank history: not on the FY2021–FY2023 lists, #89 in FY2024 and #30 in FY2025; up 19 since Jul 2024–Jun 2025.
34	Weston-Techlaw JV LLC Top NAICS codes 541620 Environmental Consulting Services	$9,685,736	0.5%	Rank history: not on the FY2021 list, #52 in FY2022, #30 in FY2023, #46 in FY2024 and #36 in FY2025; up 4 since Jul 2024–Jun 2025.
35	WSP USA Environment & Infrastructure Inc. Top NAICS codes 541620 Environmental Consulting Services 561210 Facilities Support Services	$8,862,569	0.4%	Rank history: not on the FY2021 list, #84 in FY2022, not on the FY2023 list, #64 in FY2024 and #26 in FY2025; up 1 since Jul 2024–Jun 2025.
36	MCP Computer Products Inc. Top NAICS codes 334111 Electronic Computer Manufacturing	$8,586,182	0.4%	Rank history: #27 in FY2021, #37 in FY2022, #35 in FY2023, #55 in FY2024 and #42 in FY2025; up 58 since Jul 2024–Jun 2025.
37	Patriot LLC Top NAICS codes 541512 Computer Systems Design Services	$8,026,586	0.4%	Rank history: #36 in FY2021, #29 in FY2022, #43 in FY2023, #54 in FY2024 and #94 in FY2025; up 11 since Jul 2024–Jun 2025.
38	EQ & CH Remediation Top NAICS codes 562910 Remediation Services	$7,986,606	0.4%	Rank history: #30 in FY2021, #39 in FY2022, #38 in FY2023, #22 in FY2024 and not on the FY2025 list; down 20 since Jul 2024–Jun 2025.
39	ABT Global LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541620 Environmental Consulting Services	$7,920,326	0.4%	Rank history: not on the FY2021–FY2023 lists, #51 in FY2024 and #33 in FY2025; up 6 since Jul 2024–Jun 2025.
40	Environmental Management Support, Inc. Top NAICS codes 541620 Environmental Consulting Services	$7,599,889	0.4%	Rank history: #71 in FY2021, #99 in FY2022, #92 in FY2023, #93 in FY2024 and #68 in FY2025; up 143 since Jul 2024–Jun 2025.
41	Guidehouse Inc. 3 awardees, including Aptim Federal Services, LLC Top NAICS codes 562910 Remediation Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541380 Testing Laboratories and Services	$7,240,838	0.4%	Rank history: not on the FY2021–FY2023 lists, #21 in FY2024 and #37 in FY2025; down 25 since Jul 2024–Jun 2025.
42	Conti Federal Services, LLC Top NAICS codes 562910 Remediation Services	$7,181,034	0.4%	Rank history: not on the FY2021–FY2023 lists, #31 in FY2024 and #19 in FY2025; down 16 since Jul 2024–Jun 2025.
43	Noresco, LLC Top NAICS codes 541330 Engineering Services	$7,114,910	0.4%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2023, not on the FY2024 list and #79 in FY2025; up 60 since Jul 2024–Jun 2025.
44	Attain Consulting Group LLC Through Maximus Federal Technology Solutions, LLC Top NAICS codes 541512 Computer Systems Design Services	$7,022,584	0.3%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; up 29 since Jul 2024–Jun 2025.
45	Wsp-Versar JV Through Versar-Wsp JV Top NAICS codes 562910 Remediation Services	$6,957,457	0.3%	Rank history: not on the FY2021–FY2025 lists; up 27 since Jul 2024–Jun 2025.
46	Research Triangle Institute Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$6,686,097	0.3%	Rank history: #18 in FY2021, #20 in FY2022, #16 in FY2023, #18 in FY2024 and #20 in FY2025; down 25 since Jul 2024–Jun 2025.
47	Science Applications International Corporation Top NAICS codes 541512 Computer Systems Design Services 541611 Administrative Management and General Management Consulting Services	$6,580,480	0.3%	Rank history: #3 in FY2021, #7 in FY2022, #58 in FY2023, #32 in FY2024 and #32 in FY2025; down 17 since Jul 2024–Jun 2025.
48	Techlaw Consultants Inc. Top NAICS codes 541380 Testing Laboratories and Services 562910 Remediation Services	$6,567,322	0.3%	Rank history: not on the FY2021–FY2023 lists, #39 in FY2024 and #47 in FY2025; down 17 since Jul 2024–Jun 2025.
49	Cardinal Point Captains Inc. Top NAICS codes 483114 Coastal and Great Lakes Passenger Transportation	$6,300,000	0.3%	Rank history: not on the FY2021–FY2023 lists, #71 in FY2024 and #48 in FY2025; up 12 since Jul 2024–Jun 2025.
50	SRC Inc. Top NAICS codes 541620 Environmental Consulting Services	$6,164,537	0.3%	Rank history: #37 in FY2021, #46 in FY2022, #51 in FY2023, #61 in FY2024 and #76 in FY2025; up 13 since Jul 2024–Jun 2025.
51	Great Lakes Environmental Center, Inc. Top NAICS codes 541620 Environmental Consulting Services	$6,097,710	0.3%	Rank history: #70 in FY2021, #48 in FY2022, #47 in FY2023, #58 in FY2024 and #64 in FY2025; up 3 since Jul 2024–Jun 2025.
52	Fidelis-Bbd, LLC Top NAICS codes 562910 Remediation Services	$6,030,015	0.3%	Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; new, not ranked in Jul 2024–Jun 2025.
53	Consolidated Safety Services Incorporated Top NAICS codes 541380 Testing Laboratories and Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541620 Environmental Consulting Services	$5,844,769	0.3%	Rank history: #53 in FY2021, #65 in FY2022, #61 in FY2023, #95 in FY2024 and #45 in FY2025; up 32 since Jul 2024–Jun 2025.
54	Lintech Global Inc Top NAICS codes 541512 Computer Systems Design Services 541511 Custom Computer Programming Services	$5,677,882	0.3%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2023, not on the FY2024 list and #70 in FY2025; up 20 since Jul 2024–Jun 2025.
55	LPS Kemron JV LLC Top NAICS codes 562910 Remediation Services	$5,411,026	0.3%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; up 16 since Jul 2024–Jun 2025.
56	Specpro Sustainment and Environmental, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$5,354,488	0.3%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; up 109 since Jul 2024–Jun 2025.
57	Battelle Memorial Institute Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541611 Administrative Management and General Management Consulting Services 541620 Environmental Consulting Services	$5,305,351	0.3%	Rank history: #44 in FY2021, #56 in FY2022, #63 in FY2023, #63 in FY2024 and #78 in FY2025; up 8 since Jul 2024–Jun 2025.
58	University of California, Davis Top NAICS codes 541380 Testing Laboratories and Services	$5,291,875	0.3%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; down 2 since Jul 2024–Jun 2025.
59	A and M Engineering & Environmental Services, Inc. Top NAICS codes 562910 Remediation Services	$5,239,200	0.3%	Rank history: #42 in FY2021, #47 in FY2022, not on the FY2023 list, #60 in FY2024 and #44 in FY2025; down 1 since Jul 2024–Jun 2025.
60	VGS Infrastructure Services Inc. Top NAICS codes 561210 Facilities Support Services	$5,214,579	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
61	Valiant Solutions LLC Top NAICS codes 541512 Computer Systems Design Services	$5,005,796	0.2%	Rank history: not on the FY2021–FY2023 lists, #45 in FY2024 and #27 in FY2025; down 29 since Jul 2024–Jun 2025.
62	Centennial Technologies Inc Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$4,945,832	0.2%	Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and #65 in FY2025; up 2 since Jul 2024–Jun 2025.
63	Williams Diversified Materials, Inc. Top NAICS codes 562910 Remediation Services	$4,849,351	0.2%	Rank history: not on the FY2021–FY2025 lists; up 38 since Jul 2024–Jun 2025.
64	Aleut Technical Services, LLC Top NAICS codes 541620 Environmental Consulting Services	$4,800,848	0.2%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2023, #87 in FY2024 and #98 in FY2025; up 33 since Jul 2024–Jun 2025.
65	Toeroek Associates, Inc. Top NAICS codes 541620 Environmental Consulting Services 562910 Remediation Services	$4,770,685	0.2%	Rank history: #59 in FY2021, #41 in FY2022, #42 in FY2023, #88 in FY2024 and #72 in FY2025; up 21 since Jul 2024–Jun 2025.
66	Environmental Systems Research Institute, Inc. Top NAICS codes 511210 Software Publishers	$4,629,520	0.2%	Rank history: not on the FY2021–FY2023 lists, #56 in FY2024 and #66 in FY2025; up 12 since Jul 2024–Jun 2025.
67	Industrial Economics Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541620 Environmental Consulting Services	$4,627,749	0.2%	Rank history: #65 in FY2021, #54 in FY2022, #76 in FY2023 and not on the FY2024–FY2025 lists; up 66 since Jul 2024–Jun 2025.
68	Comptech Computer Technologies, Inc. Top NAICS codes 541519 Other Computer Related Services	$4,520,376	0.2%	Rank history: #84 in FY2021, not on the FY2022 list, #79 in FY2023, #73 in FY2024 and #62 in FY2025; up 13 since Jul 2024–Jun 2025.
69	Pegasus Technical Services, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$4,075,902	0.2%	Rank history: #45 in FY2021, #57 in FY2022, #55 in FY2023, #65 in FY2024 and #60 in FY2025; down 7 since Jul 2024–Jun 2025.
70	Daycom LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$4,023,639	0.2%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; up 106 since Jul 2024–Jun 2025.
71	Skeo Solutions, Inc. Top NAICS codes 541620 Environmental Consulting Services	$4,013,278	0.2%	Rank history: #72 in FY2021, #26 in FY2022, #33 in FY2023, #43 in FY2024 and #69 in FY2025; down 21 since Jul 2024–Jun 2025.
72	Bluestone - Burns & Mcdonnell JV Top NAICS codes 541620 Environmental Consulting Services	$3,967,080	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
73	North Wind-Ea Advantage JV, LLC Top NAICS codes 562910 Remediation Services	$3,954,294	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
74	Endyna, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541620 Environmental Consulting Services	$3,870,720	0.2%	Rank history: not on the FY2021–FY2023 lists, #15 in FY2024 and #13 in FY2025; down 57 since Jul 2024–Jun 2025.
75	Nana Regional Corporation, Inc. Through Affigent, LLC Top NAICS codes 541519 Other Computer Related Services	$3,829,622	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
76	Heliotech Top NAICS codes 562910 Remediation Services	$3,699,139	0.2%	Rank history: not on the FY2021–FY2023 lists, #99 in FY2024 and not on the FY2025 list; up 33 since Jul 2024–Jun 2025.
77	Chemtex Environmental Laboratory, Inc. Top NAICS codes 541380 Testing Laboratories and Services	$3,500,000	0.2%	Rank history: not on the FY2021 list, #86 in FY2022, not on the FY2023–FY2024 lists and #55 in FY2025; up 13 since Jul 2024–Jun 2025.
78	Bonner Analytical Testing Co Top NAICS codes 541380 Testing Laboratories and Services	$3,500,000	0.2%	Rank history: not on the FY2021 list, #80 in FY2022, not on the FY2023–FY2024 lists and #57 in FY2025; down 9 since Jul 2024–Jun 2025.
79	VMD Systems Integrators LLC Top NAICS codes 541512 Computer Systems Design Services	$3,343,635	0.2%	Rank history: not on the FY2021–FY2023 lists, #86 in FY2024 and #82 in FY2025; up 21 since Jul 2024–Jun 2025.
80	MPF Federal, LLC Top NAICS codes 541940 Veterinary Services 541990 All Other Professional, Scientific, and Technical Services	$3,323,431	0.2%	Rank history: #80 in FY2021, #73 in FY2022, #82 in FY2023, #96 in FY2024 and not on the FY2025 list; up 59 since Jul 2024–Jun 2025.
81	Dsta LLC Top NAICS codes 561720 Janitorial Services	$3,318,959	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
82	Datawiz Corporation Top NAICS codes 541519 Other Computer Related Services	$3,272,586	0.2%	Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; up 5 since Jul 2024–Jun 2025.
83	Defense Contracting Activity, LLC Top NAICS codes 561612 Security Guards and Patrol Services	$3,267,807	0.2%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; down 24 since Jul 2024–Jun 2025.
84	Koniag It Systems, LLC Top NAICS codes 541519 Other Computer Related Services	$3,139,000	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
85	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top NAICS codes 541519 Other Computer Related Services	$3,102,590	0.2%	Rank history: #61 in FY2021, #72 in FY2022, #59 in FY2023 and not on the FY2024–FY2025 lists; up 127 since Jul 2024–Jun 2025.
86	Cape Remediation, LLC Top NAICS codes 562910 Remediation Services	$3,089,909	0.2%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2023, #53 in FY2024 and #49 in FY2025; down 40 since Jul 2024–Jun 2025.
87	Trust Consulting Services Inc. Top NAICS codes 561612 Security Guards and Patrol Services	$2,998,357	0.1%	Rank history: not on the FY2021–FY2025 lists; up 93 since Jul 2024–Jun 2025.
88	Keylogic, LLC Top NAICS codes 541511 Custom Computer Programming Services	$2,943,540	0.1%	Rank history: not on the FY2021–FY2025 lists; up 31 since Jul 2024–Jun 2025.
89	Savan Group, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,922,271	0.1%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; down 23 since Jul 2024–Jun 2025.
90	Arcadis U.s., Inc. Top NAICS codes 541330 Engineering Services	$2,845,610	0.1%	Rank history: not on the FY2021–FY2023 lists, #80 in FY2024 and not on the FY2025 list; up 96 since Jul 2024–Jun 2025.
91	Redhawk It Solutions, LLC Top NAICS codes 541519 Other Computer Related Services 334290 Other Communications Equipment Manufacturing	$2,827,617	0.1%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; up 23 since Jul 2024–Jun 2025.
92	Nobis Engineering, Inc. Top NAICS codes 562910 Remediation Services	$2,807,072	0.1%	Rank history: #31 in FY2021, #33 in FY2022, #95 in FY2023, #34 in FY2024 and not on the FY2025 list; down 48 since Jul 2024–Jun 2025.
93	Omega Painting & Contracting LLC Top NAICS codes 238320 Painting and Wall Covering Contractors	$2,779,453	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
94	Hana Engineers & Consultants LLC Top NAICS codes 541330 Engineering Services	$2,768,739	0.1%	Rank history: not on the FY2021–FY2025 lists; up 67 since Jul 2024–Jun 2025.
95	Data Systems Analysts Inc. Top NAICS codes 541512 Computer Systems Design Services	$2,757,490	0.1%	Rank history: #77 in FY2021, #58 in FY2022, #83 in FY2023, #62 in FY2024 and #75 in FY2025; down 28 since Jul 2024–Jun 2025.
96	Atigun Group, Inc. Top NAICS codes 561210 Facilities Support Services 493110 General Warehousing and Storage	$2,680,004	0.1%	Rank history: not on the FY2021–FY2025 lists; up 26 since Jul 2024–Jun 2025.
97	Veracity Consulting, Inc. Top NAICS codes 541519 Other Computer Related Services	$2,644,005	0.1%	Rank history: #68 in FY2021, #62 in FY2022, #74 in FY2023, not on the FY2024 list and #73 in FY2025; down 14 since Jul 2024–Jun 2025.
98	Paragon-Jacobs Joint Venture, LLC Top NAICS codes 562910 Remediation Services	$2,539,635	0.1%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; new, not ranked in Jul 2024–Jun 2025.
99	Pb&A / CSS JV, Llc. Top NAICS codes 541620 Environmental Consulting Services	$2,504,319	0.1%	Rank history: not on the FY2021 list, #55 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; up 71 since Jul 2024–Jun 2025.
100	Zolon PCS II, LLC Top NAICS codes 541512 Computer Systems Design Services	$2,468,766	0.1%	Rank history: not on the FY2021–FY2025 lists; up 17 since Jul 2024–Jun 2025.

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100 of 751 contractors listed here. See the rest on GovTribe.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $2.01 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.
Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
Rank changes compare with Jul 2024–Jun 2025. "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.
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 Environmental Protection Agency contractors in Jul 2025–Jun 2026?

1. General Dynamics Corporation ($188M), 2. Environmental Restoration LLC ($127M), 3. Salient Crgt, Inc. ($86.9M), 4. Kemron Environmental Services Inc. ($80.2M), 5. Eastern Research Group Inc. ($66.9M), 6. Hydrogeologic, Inc. ($65.7M), 7. EA Engineering Science and Technology Inc. PBC ($55.9M), 8. Tehama Technical Services, LLC ($47.6M), 9. Tetra Tech, Inc. ($41.2M), 10. Weston Solutions Holdings Inc ($36.5M).

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