Top 100 Contractors in PSC F115: Environmental Systems Protection – Environmental Consulting and Legal Support, FY2023

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Weston-Techlaw JV LLC Top agencies EPA (Environmental Protection Agency)	$15,452,244	14.0%	Rank history: #16 in FY2021, #3 in FY2022, #2 in FY2024 and #2 in FY2025; up 2 since FY2022.
2	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$13,686,620	12.4%	Rank history: #3 in FY2021, #2 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
3	Brice Solutions, LLC Top agencies DOT (Department of Transportation)	$11,849,744	10.7%	Rank history: #27 in FY2021, #7 in FY2022, not on the FY2024 list and #37 in FY2025; up 4 since FY2022.
4	Research Triangle Institute Top agencies EPA (Environmental Protection Agency)	$6,563,527	5.9%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2024 and #3 in FY2025; new.
5	Battelle Memorial Institute Top agencies HHS (Department of Health and Human Services)	$6,056,211	5.5%	Rank history: #1 in FY2021, #4 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
6	Pi3E JV LLP Top agencies HHS (Department of Health and Human Services)	$4,370,496	4.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
7	S C & A Inc. Top agencies EPA (Environmental Protection Agency) DOE (Department of Energy)	$3,255,568	2.9%	Rank history: #26 in FY2021, #13 in FY2022, #6 in FY2024 and #14 in FY2025; up 6 since FY2022.
8	Pi2E JV LLP Top agencies HHS (Department of Health and Human Services)	$3,055,397	2.8%	Rank history: #10 in FY2021, #5 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
9	Toeroek Associates, Inc. Top agencies EPA (Environmental Protection Agency)	$2,885,355	2.6%	Rank history: not on the FY2021 list, #8 in FY2022, #86 in FY2024 and not on the FY2025 list; down 1 since FY2022.
10	General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$2,834,181	2.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
11	Specpro Professional Services, LLC Top agencies Army (Department of the Army)	$2,630,894	2.4%	Rank history: #8 in FY2021, #10 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
12	Brice Engineering, LLC Top agencies Army (Department of the Army)	$2,621,071	2.4%	Rank history: #6 in FY2021, #11 in FY2022, #8 in FY2024 and not on the FY2025 list; down 1 since FY2022.
13	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies DOI (Department of the Interior) EPA (Environmental Protection Agency) SSA (Social Security Administration)	$2,435,817	2.2%	Rank history: not on the FY2021 list, #1 in FY2022, #77 in FY2024 and not on the FY2025 list; down 12 since FY2022.
14	AECOM Through AECOM Technical Services, Inc. Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior) GSA (General Services Administration)	$2,327,803	2.1%	Rank history: #44 in FY2021, #9 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
15	Avanti Corporation 2 awardees Top agencies EPA (Environmental Protection Agency)	$2,090,881	1.9%	Rank history: not on the FY2021 list, #66 in FY2022, #7 in FY2024 and #23 in FY2025; up 51 since FY2022.
16	Spatial Front Inc Top agencies Commerce (Department of Commerce)	$2,019,297	1.8%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2024 and #10 in FY2025; new.
17	Versar Inc. Top agencies HHS (Department of Health and Human Services)	$1,858,710	1.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
18	Horsley Witten Group, Inc. Top agencies EPA (Environmental Protection Agency)	$1,849,880	1.7%	Rank history: #19 in FY2021, #37 in FY2022, #11 in FY2024 and #25 in FY2025; up 19 since FY2022.
19	Whitetail Environmental, LLC Top agencies DOI (Department of the Interior)	$1,782,865	1.6%	Rank history: #18 in FY2021, #24 in FY2022, #19 in FY2024 and #21 in FY2025; up 5 since FY2022.
20	Envirosystems Management Inc. Top agencies USDA (Department of Agriculture)	$1,085,334	1.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
21	PG Environmental, LLC Top agencies EPA (Environmental Protection Agency)	$1,017,141	0.9%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
22	CCI Facility Support Services LLC Top agencies Army (Department of the Army)	$930,000	0.8%	Rank history: not on the FY2021 list, #16 in FY2022, #14 in FY2024 and #15 in FY2025; down 6 since FY2022.
23	Tetra Tech, Inc. Top agencies EPA (Environmental Protection Agency) DOE (Department of Energy)	$870,325	0.8%	Rank history: not on the FY2021 list, #21 in FY2022, #29 in FY2024 and #12 in FY2025; down 2 since FY2022.
24	Sol Solutions, LLC Top agencies Army (Department of the Army)	$855,994	0.8%	Rank history: #2 in FY2021, #26 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
25	Harris Environmental Group Inc. Top agencies USDA (Department of Agriculture)	$704,652	0.6%	Rank history: #61 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
26	Oneida Nation Through Sustainment & Restoration Services, LLC Top agencies USAF (Department of the Air Force)	$681,222	0.6%	Rank history: #34 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
27	ABT Global LLC Top agencies EPA (Environmental Protection Agency)	$651,513	0.6%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2024 and #7 in FY2025; new.
28	Renova Environmental Company Top agencies Army (Department of the Army)	$577,426	0.5%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2024 and not on the FY2025 list; new.
29	ECO & Associates, Inc. Top agencies Army (Department of the Army)	$576,706	0.5%	Rank history: #25 in FY2021, #30 in FY2022, #30 in FY2024 and not on the FY2025 list; up 1 since FY2022.
30	Noreas Inc. Top agencies NASA (National Aeronautics and Space Administration)	$538,620	0.5%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2024 and not on the FY2025 list; new.
31	Lynker Corporation Top agencies Commerce (Department of Commerce)	$538,470	0.5%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2024 and #29 in FY2025; new.
32	Guidehouse Inc. Top agencies GSA (General Services Administration)	$516,346	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
33	Chemtrack Alaska, Inc. Top agencies DOT (Department of Transportation)	$455,440	0.4%	Rank history: not on the FY2021 list, #82 in FY2022, #82 in FY2024 and not on the FY2025 list; up 49 since FY2022.
34	Environmental Research Group LLC Top agencies Army (Department of the Army) WHS (DOD Washington Headquarters Service)	$453,294	0.4%	Rank history: #12 in FY2021, #18 in FY2022, #20 in FY2024 and #19 in FY2025; down 16 since FY2022.
35	D7, LLC Top agencies Army (Department of the Army)	$425,001	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
36	SP Cramer & Associates Inc. Top agencies DOI (Department of the Interior)	$409,773	0.4%	Rank history: #29 in FY2021, #29 in FY2022, #32 in FY2024 and not on the FY2025 list; down 7 since FY2022.
37	Marstel-Day, LLC Top agencies DOI (Department of the Interior) Army (Department of the Army)	$394,949	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
38	Purdue Applied Research Institute, LLC Top agencies DOE (Department of Energy)	$391,000	0.4%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2024 and #65 in FY2025; new.
39	Lindahl Reed, Inc. Top agencies USDA (Department of Agriculture)	$385,788	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #39 in FY2025; new.
40	Ciri Development Corporation Through North Wind Resource Consulting LLC Top agencies USDA (Department of Agriculture)	$348,720	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
41	Water, Civil and Environmental Incorporated Top agencies USDA (Department of Agriculture)	$329,485	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #50 in FY2025; new.
42	Talu LLC Top agencies DOL (Department of Labor)	$322,756	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
43	Auxilio Management Services Top agencies Commerce (Department of Commerce)	$298,789	0.3%	Rank history: #22 in FY2021, #31 in FY2022, #45 in FY2024 and not on the FY2025 list; down 12 since FY2022.
44	The Ottery Group, Inc. Top agencies DOI (Department of the Interior)	$267,075	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #35 in FY2025; new.
45	Galileo Project LLC Top agencies USDA (Department of Agriculture)	$263,742	0.2%	Rank history: not on the FY2021 list, #53 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
46	WSP USA Solutions Inc. Top agencies DOI (Department of the Interior)	$253,914	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
47	Dpra Incorporated Top agencies EPA (Environmental Protection Agency)	$253,685	0.2%	Rank history: #43 in FY2021, #39 in FY2022, #37 in FY2024 and #31 in FY2025; down 8 since FY2022.
48	N.w.f.f., Inc. Top agencies DHS (Department of Homeland Security)	$250,000	0.2%	Rank history: not on the FY2021 list, #48 in FY2022, #48 in FY2024 and not on the FY2025 list; unchanged since FY2022.
49	George Mason University Top agencies EPA (Environmental Protection Agency)	$249,396	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
50	Environmental Cost Management, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$238,337	0.2%	Rank history: not on the FY2021 list, #78 in FY2022, #27 in FY2024 and #30 in FY2025; up 28 since FY2022.
51	Sundance - EA Alliance, LLC Top agencies Army (Department of the Army)	$229,816	0.2%	Rank history: not on the FY2021 list, #71 in FY2022, not on the FY2024 list and #34 in FY2025; up 20 since FY2022.
52	Great Lakes Environmental Center, Inc. Top agencies EPA (Environmental Protection Agency)	$224,990	0.2%	Rank history: #38 in FY2021, #63 in FY2022, #59 in FY2024 and not on the FY2025 list; up 11 since FY2022.
53	Mead & Hunt Inc. Top agencies DOT (Department of Transportation)	$202,401	0.2%	Rank history: #80 in FY2021, not on the FY2022 list, #78 in FY2024 and #43 in FY2025; returned.
54	Southern Research Historic Preservation Consultants, Inc. Top agencies USDA (Department of Agriculture)	$197,394	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
55	Potomac-Hudson Engineering Inc Top agencies GSA (General Services Administration)	$196,158	0.2%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2024 and #20 in FY2025; new.
56	Qri-Tetra TECH JV Top agencies Army (Department of the Army)	$195,064	0.2%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2024 and not on the FY2025 list; new.
57	C.j. Seto Support Services, LLC Top agencies DOJ (Department of Justice)	$181,754	0.2%	Rank history: #40 in FY2021, #44 in FY2022, #72 in FY2024 and not on the FY2025 list; down 13 since FY2022.
58	Ahtna, Incorporated Through Ahtna Global LLC Top agencies DOT (Department of Transportation)	$178,602	0.2%	Rank history: #7 in FY2021, #6 in FY2022 and not on the FY2024–FY2025 lists; down 52 since FY2022.
59	Eaf2Jv LLC Top agencies Army (Department of the Army)	$128,340	0.1%	Rank history: not on the FY2021 list, #68 in FY2022 and not on the FY2024–FY2025 lists; up 9 since FY2022.
60	ASM Affiliates Inc. Top agencies DOI (Department of the Interior)	$125,304	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #46 in FY2025; new.
61	Cardno Emerging Markets USA Ltd. Through Stantec GS Inc. Top agencies DOI (Department of the Interior)	$118,845	0.1%	Rank history: not on the FY2021 list, #50 in FY2022, #67 in FY2024 and not on the FY2025 list; down 11 since FY2022.
62	Castle Hill Associates, LLC Top agencies VA (Department of Veterans Affairs)	$101,777	0.1%	Rank history: #97 in FY2021, not on the FY2022 list, #50 in FY2024 and not on the FY2025 list; returned.
63	Biosphere International Inc Top agencies VA (Department of Veterans Affairs)	$100,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2024 and not on the FY2025 list; new.
64	Stell Environmental Enterprises Inc. Top agencies Army (Department of the Army)	$91,528	0.1%	Rank history: #33 in FY2021, #76 in FY2022 and not on the FY2024–FY2025 lists; up 12 since FY2022.
65	O'Brien & Gere Engineers Inc. Through Ramboll Americas Engineering Solutions, Inc. Top agencies National Gallery of Art	$91,179	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
66	Siskiyou Biosurvey LLC Top agencies USDA (Department of Agriculture)	$90,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
67	Whitetail / LRS LLC Top agencies Army (Department of the Army)	$81,589	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
68	Midatlantic Solid Waste Consultants LLC Top agencies VA (Department of Veterans Affairs)	$79,276	0.1%	Rank history: #75 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
69	Devereux Consulting, Inc. Top agencies DOI (Department of the Interior)	$75,638	0.1%	Rank history: #41 in FY2021, not on the FY2022 list, #46 in FY2024 and #44 in FY2025; returned.
70	Parliament LLC Top agencies USDA (Department of Agriculture)	$74,751	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
71	Invasive Plant Control Inc. Top agencies USDA (Department of Agriculture)	$72,571	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
72	Erg-Phe JV, LLC Top agencies Army (Department of the Army)	$68,628	0.1%	Rank history: not on the FY2021 list, #58 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
73	Environmental Science Corporation Top agencies Navy (Department of the Navy)	$61,440	0.1%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2024 and #53 in FY2025; new.
74	HRS Water Consultants, Inc. Top agencies DOI (Department of the Interior)	$54,990	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	Hanagita Environmental Resources, Corp. Top agencies DOT (Department of Transportation)	$53,600	<0.1%	Rank history: not on the FY2021 list, #62 in FY2022, #70 in FY2024 and not on the FY2025 list; down 13 since FY2022.
76	Mihalik Group LLC Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$52,992	<0.1%	Rank history: #70 in FY2021, #70 in FY2022, #58 in FY2024 and #40 in FY2025; down 6 since FY2022.
77	Hawaii International Environmental Services Inc. Top agencies Navy (Department of the Navy)	$52,830	<0.1%	Rank history: #65 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 29 since FY2022.
78	Franklin Young International, Incorporated Top agencies VA (Department of Veterans Affairs)	$46,742	<0.1%	Rank history: #66 in FY2021, #75 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
79	Carnow, Conibear & Assoc,. Ltd. Top agencies GSA (General Services Administration)	$45,801	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 33 since FY2022.
80	The NDN Companies Top agencies DOT (Department of Transportation)	$45,377	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
81	Aquarange Research LLC Top agencies DOI (Department of the Interior)	$40,000	<0.1%	Rank history: not on the FY2021 list, #83 in FY2022, #79 in FY2024 and #58 in FY2025; up 2 since FY2022.
82	HGS Engineering Inc. Top agencies USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$38,676	<0.1%	Rank history: #72 in FY2021, #65 in FY2022, #61 in FY2024 and not on the FY2025 list; down 17 since FY2022.
83	KR Environmental Services Inc. Top agencies GSA (General Services Administration)	$37,475	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
84	Baysinger-Bric JV Top agencies GSA (General Services Administration)	$35,048	<0.1%	Rank history: not on the FY2021 list, #74 in FY2022 and not on the FY2024–FY2025 lists; down 10 since FY2022.
85	Sinclair Broadcast Group Inc. Through Politico, LLC Top agencies USDA (Department of Agriculture)	$34,060	<0.1%	Rank history: #79 in FY2021, #87 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
86	Stephen J Libby PHD Consulting LLC Top agencies DOI (Department of the Interior)	$30,000	<0.1%	Rank history: not on the FY2021 list, #90 in FY2022, #80 in FY2024 and not on the FY2025 list; up 4 since FY2022.
87	Advanced Matrix, Inc. Top agencies DHS (Department of Homeland Security)	$29,000	<0.1%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2024 and #60 in FY2025; new.
88	Applied Intellect LLC Top agencies USDA (Department of Agriculture)	$28,731	<0.1%	Rank history: not on the FY2021 list, #57 in FY2022, #81 in FY2024 and not on the FY2025 list; down 31 since FY2022.
89	Ayuda Companies Top agencies GSA (General Services Administration) Army (Department of the Army)	$27,767	<0.1%	Rank history: #31 in FY2021, #20 in FY2022 and not on the FY2024–FY2025 lists; down 69 since FY2022.
90	Cedarville Engineering Group LLC Top agencies Army (Department of the Army)	$25,000	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
91	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$25,000	<0.1%	Rank history: not on the FY2021 list, #19 in FY2022, #5 in FY2024 and #9 in FY2025; down 72 since FY2022.
92	Pace Engineers, Inc. Top agencies VA (Department of Veterans Affairs)	$24,000	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
93	Paul Andrew Maier Top agencies USDA (Department of Agriculture)	$21,200	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Blackhawk Environmental Inc. Top agencies VA (Department of Veterans Affairs)	$19,420	<0.1%	Rank history: #82 in FY2021, #92 in FY2022, #93 in FY2024 and #64 in FY2025; down 2 since FY2022.
95	Swca Incorporated Top agencies DOI (Department of the Interior)	$19,255	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
96	Relx Inc Through Elsevier Inc. Top agencies HHS (Department of Health and Human Services)	$18,749	<0.1%	Rank history: not on the FY2021 list, #94 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
97	Industrial Economics Inc. Top agencies EPA (Environmental Protection Agency)	$18,295	<0.1%	Rank history: #47 in FY2021, #46 in FY2022, #92 in FY2024 and not on the FY2025 list; down 51 since FY2022.
98	Petroleum Resources & Development, Inc. Top agencies DOT (Department of Transportation)	$18,032	<0.1%	Rank history: #37 in FY2021, #32 in FY2022 and not on the FY2024–FY2025 lists; down 66 since FY2022.
99	Vanasse Hangen Brustlin, Inc. Top agencies DOI (Department of the Interior)	$17,993	<0.1%	Rank history: not on the FY2021 list, #47 in FY2022 and not on the FY2024–FY2025 lists; down 52 since FY2022.
100	Green Living Consulting LLC Top agencies Smithsonian (Smithsonian Institution)	$17,969	<0.1%	Rank history: not on the FY2021 list, #99 in FY2022, not on the FY2024 list and #62 in FY2025; down 1 since FY2022.

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 $111 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 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