Top 78 Contractors in PSC F115: Environmental Systems Protection – Environmental Consulting and Legal Support, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$8,029,733	7.8%	Rank history: #3 in FY2021, #2 in FY2022, #2 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since Aug 2024–Jul 2025.
2	The Cadmus Group LLC Top agencies EPA (Environmental Protection Agency)	$6,897,307	6.7%	Rank history: #45 in FY2021, #72 in FY2022, not on the FY2023 list, #35 in FY2024 and #6 in FY2025; up 7 since Aug 2024–Jul 2025.
3	Weston-Techlaw JV LLC Top agencies EPA (Environmental Protection Agency)	$6,574,555	6.4%	Rank history: #16 in FY2021, #3 in FY2022, #1 in FY2023, #2 in FY2024 and #2 in FY2025; down 1 since Aug 2024–Jul 2025.
4	Stantec Inc. Through Stantec Consulting Services Inc. Top agencies DOI (Department of the Interior)	$5,145,625	5.0%	Rank history: not on the FY2021–FY2024 lists and #4 in FY2025; new, not ranked in Aug 2024–Jul 2025.
5	Oneida Total Integrated Enterprises LLC Top agencies USAF (Department of the Air Force)	$5,092,943	5.0%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #11 in FY2025; up 5 since Aug 2024–Jul 2025.
6	Research Triangle Institute Top agencies EPA (Environmental Protection Agency)	$4,707,598	4.6%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2023, #3 in FY2024 and #3 in FY2025; unchanged since Aug 2024–Jul 2025.
7	Bluestone - Burns & Mcdonnell JV Top agencies EPA (Environmental Protection Agency)	$3,967,080	3.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
8	Tetra Tech, Inc. Top agencies DOE (Department of Energy)	$3,662,322	3.6%	Rank history: not on the FY2021 list, #21 in FY2022, #23 in FY2023, #29 in FY2024 and #12 in FY2025; unchanged since Aug 2024–Jul 2025.
9	Environmental Quality Management, Inc. Top agencies USAF (Department of the Air Force)	$3,082,269	3.0%	Rank history: not on the FY2021–FY2025 lists; down 2 since Aug 2024–Jul 2025.
10	Spatial Front Inc Top agencies Commerce (Department of Commerce)	$2,513,402	2.4%	Rank history: not on the FY2021–FY2022 lists, #16 in FY2023, #15 in FY2024 and #10 in FY2025; up 1 since Aug 2024–Jul 2025.
11	Property & Environmental Management Inc. Top agencies HHS (Department of Health and Human Services)	$2,491,816	2.4%	Rank history: not on the FY2021–FY2024 lists and #13 in FY2025; up 3 since Aug 2024–Jul 2025.
12	S C & A Inc. Top agencies EPA (Environmental Protection Agency) DOE (Department of Energy)	$2,271,534	2.2%	Rank history: #26 in FY2021, #13 in FY2022, #7 in FY2023, #6 in FY2024 and #14 in FY2025; unchanged since Aug 2024–Jul 2025.
13	Bristol Bay Native Corporation 2 awardees, including CCI Facility Support Services LLC and Aerostar Environmental, LLC Top agencies Army (Department of the Army)	$1,916,276	1.9%	Rank history: not on the FY2021–FY2024 lists and #15 in FY2025; new, not ranked in Aug 2024–Jul 2025.
14	Sequoia Ecological Consulting Inc. Top agencies DOI (Department of the Interior)	$1,879,307	1.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
15	Environmental Research Group LLC Top agencies WHS (DOD Washington Headquarters Service) Army (Department of the Army)	$1,636,962	1.6%	Rank history: #12 in FY2021, #18 in FY2022, #34 in FY2023, #20 in FY2024 and #19 in FY2025; up 9 since Aug 2024–Jul 2025.
16	Coterie Environmental LLC Top agencies Army (Department of the Army)	$1,464,886	1.4%	Rank history: not on the FY2021–FY2023 lists, #21 in FY2024 and #16 in FY2025; up 15 since Aug 2024–Jul 2025.
17	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$1,343,968	1.3%	Rank history: not on the FY2021 list, #19 in FY2022, #91 in FY2023, #5 in FY2024 and #9 in FY2025; down 12 since Aug 2024–Jul 2025.
18	Sustainment & Restoration Services, LLC Top agencies USAF (Department of the Air Force)	$1,311,969	1.3%	Rank history: not on the FY2021–FY2023 lists, #18 in FY2024 and #17 in FY2025; up 1 since Aug 2024–Jul 2025.
19	ICF International Inc. Through ICF Incorporated, L.L.C. Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior)	$1,112,127	1.1%	Rank history: not on the FY2021–FY2025 lists; down 6 since Aug 2024–Jul 2025.
20	Potomac-Hudson Engineering Inc Top agencies GSA (General Services Administration)	$1,096,834	1.1%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2023, #42 in FY2024 and #20 in FY2025; up 14 since Aug 2024–Jul 2025.
21	The Solution Foundry, LLC Top agencies USAF (Department of the Air Force)	$957,671	0.9%	Rank history: not on the FY2021–FY2024 lists and #18 in FY2025; new, not ranked in Aug 2024–Jul 2025.
22	Oneida Environmental, LLC Top agencies DOI (Department of the Interior)	$957,171	0.9%	Rank history: not on the FY2021–FY2023 lists, #13 in FY2024 and #22 in FY2025; down 7 since Aug 2024–Jul 2025.
23	CDM Smith Inc. Through CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency)	$760,660	0.7%	Rank history: not on the FY2021 list, #15 in FY2022, not on the FY2023–FY2024 lists and #5 in FY2025; new, not ranked in Aug 2024–Jul 2025.
24	WSP USA Solutions Inc 2 awardees, including WSP USA Environment & Infrastructure Inc. Top agencies USAF (Department of the Air Force)	$749,658	0.7%	Rank history: not on the FY2021–FY2023 lists, #71 in FY2024 and not on the FY2025 list; up 57 since Aug 2024–Jul 2025.
25	Whitetail Environmental, LLC Top agencies DOI (Department of the Interior)	$698,670	0.7%	Rank history: #18 in FY2021, #24 in FY2022, #19 in FY2023, #19 in FY2024 and #21 in FY2025; down 7 since Aug 2024–Jul 2025.
26	Fed95 LLC Top agencies DOE (Department of Energy)	$618,852	0.6%	Rank history: not on the FY2021–FY2023 lists, #40 in FY2024 and #56 in FY2025; up 32 since Aug 2024–Jul 2025.
27	Purdue University Through Purdue Applied Research Institute, LLC Top agencies DOE (Department of Energy)	$618,800	0.6%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; new, not ranked in Aug 2024–Jul 2025.
28	Erg-Terracon JV, L.L.C. Top agencies USDA (Department of Agriculture)	$579,619	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
29	Water, Civil and Environmental Incorporated Top agencies USDA (Department of Agriculture)	$533,657	0.5%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023, not on the FY2024 list and #50 in FY2025; up 24 since Aug 2024–Jul 2025.
30	Lynker Corporation Top agencies Commerce (Department of Commerce)	$431,244	0.4%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2023, #26 in FY2024 and #29 in FY2025; down 8 since Aug 2024–Jul 2025.
31	Specpro Sustainment and Environmental, LLC Top agencies USAF (Department of the Air Force)	$417,710	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
32	G2 Archaeology Top agencies USDA (Department of Agriculture)	$413,650	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
33	Vanasse Hangen Brustlin, Inc. Top agencies DOI (Department of the Interior)	$377,251	0.4%	Rank history: not on the FY2021 list, #47 in FY2022, #99 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
34	Solv LLC Top agencies DOI (Department of the Interior)	$292,441	0.3%	Rank history: #11 in FY2021, #49 in FY2022, not on the FY2023 list, #53 in FY2024 and #33 in FY2025; new, not ranked in Aug 2024–Jul 2025.
35	New South Associates, Inc. Top agencies DOT (Department of Transportation) DOI (Department of the Interior)	$282,018	0.3%	Rank history: not on the FY2021–FY2024 lists and #36 in FY2025; up 34 since Aug 2024–Jul 2025.
36	AECOM 2 awardees, including AECOM Technical Services, Inc. Top agencies DOI (Department of the Interior) GSA (General Services Administration) DOT (Department of Transportation)	$280,983	0.3%	Rank history: #44 in FY2021, #9 in FY2022, #14 in FY2023, not on the FY2024 list and #32 in FY2025; new, not ranked in Aug 2024–Jul 2025.
37	Apec Co., Ltd Top agencies Army (Department of the Army)	$204,534	0.2%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; new, not ranked in Aug 2024–Jul 2025.
38	Calista Corp 3 awardees, including Brice Solutions, LLC Top agencies DOT (Department of Transportation)	$155,333	0.2%	Rank history: #4 in FY2021, #14 in FY2022, not on the FY2023–FY2024 lists and #37 in FY2025; new, not ranked in Aug 2024–Jul 2025.
39	Mead & Hunt Inc. Top agencies DOT (Department of Transportation)	$146,701	0.1%	Rank history: #80 in FY2021, not on the FY2022 list, #53 in FY2023, #78 in FY2024 and #43 in FY2025; new, not ranked in Aug 2024–Jul 2025.
40	Environmental Cost Management, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$135,264	0.1%	Rank history: not on the FY2021 list, #78 in FY2022, #50 in FY2023, #27 in FY2024 and #30 in FY2025; down 10 since Aug 2024–Jul 2025.
41	Devereux Consulting, Inc. Top agencies DOI (Department of the Interior)	$117,149	0.1%	Rank history: #41 in FY2021, not on the FY2022 list, #69 in FY2023, #46 in FY2024 and #44 in FY2025; down 1 since Aug 2024–Jul 2025.
42	SP Cramer & Associates Inc. Top agencies DOI (Department of the Interior)	$113,974	0.1%	Rank history: #29 in FY2021, #29 in FY2022, #36 in FY2023, #32 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
43	Hartgen Archeological Associates, Inc. Top agencies USDA (Department of Agriculture)	$102,446	0.1%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; up 9 since Aug 2024–Jul 2025.
44	Simpson Gumpertz & Heger Inc. Top agencies DOE (Department of Energy)	$99,834	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
45	Brenton Consulting LLC Top agencies Commerce (Department of Commerce)	$97,440	0.1%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; new, not ranked in Aug 2024–Jul 2025.
46	Euroatlantic Partners Top agencies DOS (Department of State)	$95,883	0.1%	Rank history: not on the FY2021–FY2023 lists, #60 in FY2024 and #48 in FY2025; up 3 since Aug 2024–Jul 2025.
47	Engineering/Remediation Resources Group Inc. Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$90,291	0.1%	Rank history: not on the FY2021–FY2023 lists, #23 in FY2024 and #24 in FY2025; down 27 since Aug 2024–Jul 2025.
48	JNV Group Top agencies HHS (Department of Health and Human Services)	$88,740	0.1%	Rank history: not on the FY2021–FY2023 lists, #62 in FY2024 and #49 in FY2025; up 2 since Aug 2024–Jul 2025.
49	Mihalik Group LLC Top agencies DHA (Defense Health Agency)	$84,460	0.1%	Rank history: #70 in FY2021, #70 in FY2022, #76 in FY2023, #58 in FY2024 and #40 in FY2025; down 6 since Aug 2024–Jul 2025.
50	DCR Services & Construction Inc. Top agencies DOI (Department of the Interior)	$81,747	0.1%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; down 4 since Aug 2024–Jul 2025.
51	Vibrant Planet, PBC Top agencies DOI (Department of the Interior)	$75,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; down 23 since Aug 2024–Jul 2025.
52	Spring Fountain Studios LLC Top agencies USDA (Department of Agriculture)	$69,250	0.1%	Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; new, not ranked in Aug 2024–Jul 2025.
53	Censeo Consulting Group, Inc. Top agencies EPA (Environmental Protection Agency)	$67,757	0.1%	Rank history: not on the FY2021–FY2023 lists, #16 in FY2024 and #27 in FY2025; down 27 since Aug 2024–Jul 2025.
54	Geocomp, Inc. Top agencies DOE (Department of Energy)	$66,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
55	Mabbett & Associates, Inc. Top agencies Treasury (Department of the Treasury)	$65,748	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
56	R4 Technologies, Inc. Through Dpra Incorporated Top agencies EPA (Environmental Protection Agency)	$53,424	0.1%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; new, not ranked in Aug 2024–Jul 2025.
57	Environmental Science Corporation Top agencies Navy (Department of the Navy)	$52,180	0.1%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2023, #51 in FY2024 and #53 in FY2025; down 15 since Aug 2024–Jul 2025.
58	Water Isac Top agencies EPA (Environmental Protection Agency)	$48,749	<0.1%	Rank history: not on the FY2021–FY2024 lists and #55 in FY2025; up 2 since Aug 2024–Jul 2025.
59	Zara Environmental LLC Top agencies DOI (Department of the Interior)	$45,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
60	HGS Engineering Inc. Top agencies USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$39,805	<0.1%	Rank history: #72 in FY2021, #65 in FY2022, #82 in FY2023, #61 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
61	Burdick, David R. Top agencies DOI (Department of the Interior)	$39,800	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
62	Advanced Matrix, Inc. Top agencies DHS (Department of Homeland Security)	$28,000	<0.1%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2023, #87 in FY2024 and #60 in FY2025; down 1 since Aug 2024–Jul 2025.
63	The Ottery Group, Inc. Top agencies DOI (Department of the Interior)	$25,780	<0.1%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2023, not on the FY2024 list and #35 in FY2025; down 24 since Aug 2024–Jul 2025.
64	Blackhawk Environmental Inc. Top agencies VA (Department of Veterans Affairs)	$20,620	<0.1%	Rank history: #82 in FY2021, #92 in FY2022, #94 in FY2023, #93 in FY2024 and #64 in FY2025; up 11 since Aug 2024–Jul 2025.
65	Jacobs Engineering Group Inc. Top agencies DOI (Department of the Interior)	$20,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; down 10 since Aug 2024–Jul 2025.
66	Advanced Environmental Management Group, LLC Top agencies DOI (Department of the Interior)	$15,830	<0.1%	Rank history: #91 in FY2021, not on the FY2022–FY2023 lists, #97 in FY2024 and #66 in FY2025; up 13 since Aug 2024–Jul 2025.
67	Act Safe, L.L.C. Top agencies VA (Department of Veterans Affairs)	$15,600	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
68	Aarcher, Inc. Top agencies DOE (Department of Energy)	$15,502	<0.1%	Rank history: #100 in FY2021, not on the FY2022–FY2024 lists and #67 in FY2025; new, not ranked in Aug 2024–Jul 2025.
69	Scout Environmental, Inc. Top agencies VA (Department of Veterans Affairs)	$15,357	<0.1%	Rank history: not on the FY2021–FY2023 lists, #98 in FY2024 and #68 in FY2025; up 7 since Aug 2024–Jul 2025.
70	Green Living Consulting LLC Top agencies Smithsonian (Smithsonian Institution)	$15,000	<0.1%	Rank history: not on the FY2021 list, #99 in FY2022, #100 in FY2023, not on the FY2024 list and #62 in FY2025; up 4 since Aug 2024–Jul 2025.
71	Bb&E, Inc. Top agencies DOI (Department of the Interior)	$13,972	<0.1%	Rank history: not on the FY2021–FY2023 lists, #36 in FY2024 and not on the FY2025 list; down 35 since Aug 2024–Jul 2025.
72	Lake Roosevelt Forum Top agencies DOI (Department of the Interior)	$13,500	<0.1%	Rank history: #96 in FY2021, not on the FY2022–FY2023 lists, #100 in FY2024 and #69 in FY2025; up 5 since Aug 2024–Jul 2025.
73	Trinity Consultants Inc. Top agencies National Gallery of Art	$13,200	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
74	Colorado Department of Public Health & Environment Top agencies DOI (Department of the Interior)	$12,665	<0.1%	Rank history: not on the FY2021–FY2023 lists, #89 in FY2024 and #71 in FY2025; up 9 since Aug 2024–Jul 2025.
75	Whitetail/LRS LLC Top agencies Army (Department of the Army)	$12,383	<0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; up 3 since Aug 2024–Jul 2025.
76	Sourcewater Consulting LLC Top agencies DOI (Department of the Interior)	$5,023	<0.1%	Rank history: not on the FY2021–FY2024 lists and #72 in FY2025; up 9 since Aug 2024–Jul 2025.
77	Egc, Inc. Top agencies DOI (Department of the Interior)	$4,522	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
78	Landmark Environmental LLC Top agencies USDA (Department of Agriculture)	$3,750	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.

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 $103 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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 Aug 2024–Jul 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