Top 37 Contractors in PSC F101: Air Quality Support Services, FY2024

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$3,940,836	24.4%	Rank history: #1 in FY2021, #2 in FY2022, #1 in FY2023 and #7 in FY2025; unchanged since FY2023.
2	Research Triangle Institute Top agencies EPA (Environmental Protection Agency)	$3,870,983	23.9%	Rank history: #2 in FY2021, #1 in FY2022, #2 in FY2023 and #1 in FY2025; unchanged since FY2023.
3	University of North Carolina At Chapel Hill 2 awardees Top agencies EPA (Environmental Protection Agency)	$2,703,924	16.7%	Rank history: #3 in FY2021, #5 in FY2022, #3 in FY2023 and #2 in FY2025; unchanged since FY2023.
4	Wilbur Technical Services LLC Top agencies DOS (Department of State)	$1,618,377	10.0%	Rank history: #12 in FY2021, #4 in FY2022, #4 in FY2023 and #8 in FY2025; unchanged since FY2023.
5	American Testing, Inc. Top agencies HHS (Department of Health and Human Services)	$622,333	3.8%	Rank history: #4 in FY2021, #7 in FY2022, #5 in FY2023 and #6 in FY2025; unchanged since FY2023.
6	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$573,844	3.6%	Rank history: #5 in FY2021, #8 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
7	Techlaw Consultants Inc. Top agencies EPA (Environmental Protection Agency)	$423,008	2.6%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2025; new.
8	Bluestone Interspec JV, LLC Top agencies Navy (Department of the Navy)	$342,340	2.1%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2023 and #5 in FY2025; down 2 since FY2023.
9	Hawaii International Environmental Services Inc. Top agencies Navy (Department of the Navy)	$227,118	1.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
10	Teya Enterprises LLC Top agencies Navy (Department of the Navy)	$204,774	1.3%	Rank history: not on the FY2021 list, #10 in FY2022, #7 in FY2023 and #10 in FY2025; down 3 since FY2023.
11	Ridelinks Inc. Top agencies VA (Department of Veterans Affairs)	$135,869	0.8%	Rank history: #13 in FY2021, #11 in FY2022, #12 in FY2023 and #21 in FY2025; up 1 since FY2023.
12	Brand Construction LLC Top agencies VA (Department of Veterans Affairs)	$113,863	0.7%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2025; new.
13	Thermo Environmental Instruments LLC Top agencies EPA (Environmental Protection Agency)	$102,504	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
14	Montana Department of Environmental Quality Top agencies USDA (Department of Agriculture)	$94,302	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
15	XL Construction LLC Top agencies DOI (Department of the Interior)	$90,958	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
16	Property & Environmental Management Inc. Top agencies Treasury (Department of the Treasury)	$54,197	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
17	Gulf Geoexchange and Consulting Services, Inc. Top agencies VA (Department of Veterans Affairs)	$41,591	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
18	Kane Environmental Inc Top agencies Navy (Department of the Navy)	$41,552	0.3%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2023 and #20 in FY2025; up 6 since FY2023.
19	Cerex Monitoring Solutions LLC Top agencies EPA (Environmental Protection Agency)	$41,155	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
20	Air Resource Specialists, Inc. Top agencies EPA (Environmental Protection Agency)	$39,652	0.2%	Rank history: #7 in FY2021, #9 in FY2022, #10 in FY2023 and #11 in FY2025; down 10 since FY2023.
21	Green 2 Green Consulting LLC Top agencies Army (Department of the Army)	$36,546	0.2%	Rank history: #31 in FY2021, #25 in FY2022, #22 in FY2023 and #30 in FY2025; up 1 since FY2023.
22	Caldaia Controls LLC Top agencies VA (Department of Veterans Affairs)	$30,975	0.2%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023 and not on the FY2025 list; up 4 since FY2023.
23	Ess Instruments, Inc. Top agencies DOS (Department of State)	$29,141	0.2%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2023 and not on the FY2025 list; up 6 since FY2023.
24	Colorado Department of Public Health & Environment Top agencies DOI (Department of the Interior)	$28,968	0.2%	Rank history: not on the FY2021 list, #26 in FY2022, not on the FY2023 list and #24 in FY2025; returned.
25	Dayton Group Inc Top agencies USAID (US Agency for International Development)	$28,062	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
26	Iveco SUD-West Nutzfahrzeuge GMBH Through Ati, Inc. Top agencies Treasury (Department of the Treasury)	$23,375	0.1%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2023 and not on the FY2025 list; up 2 since FY2023.
27	Eckert & Ziegler Analytics Inc. Top agencies EPA (Environmental Protection Agency)	$22,900	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
28	Geoinsight, Inc. Top agencies DHS (Department of Homeland Security)	$22,400	0.1%	Rank history: #29 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
29	Global Service Titan LLC Top agencies DOS (Department of State)	$15,184	0.1%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2025; new.
30	Vigilife, Inc. Top agencies DOI (Department of the Interior)	$15,000	0.1%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2025; new.
31	Western Environmental Services and Testing, Inc. Top agencies USDA (Department of Agriculture)	$13,080	0.1%	Rank history: not on the FY2021 list, #32 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
32	Environmental Group Services Ltd Top agencies GSA (General Services Administration)	$10,350	0.1%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023 and not on the FY2025 list; up 2 since FY2023.
33	Titan Environmental Solutions, Inc. Top agencies SSA (Social Security Administration)	$5,293	<0.1%	Rank history: not on the FY2021 list, #30 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
34	Gryphon Investors Inc. Through Trinity Consultants Inc. Top agencies DOJ (Department of Justice)	$4,800	<0.1%	Rank history: #37 in FY2021, #35 in FY2022, #33 in FY2023 and not on the FY2025 list; down 1 since FY2023.
35	Atlantic Testing Laboratories, Limited Top agencies DOT (Department of Transportation)	$4,279	<0.1%	Rank history: not on the FY2021–FY2022 lists, #37 in FY2023 and not on the FY2025 list; up 2 since FY2023.
36	Virginia Department of Environmental Quality Top agencies DOJ (Department of Justice)	$4,240	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
37	WTI Inc. Through Western Technologies Inc. Top agencies DOI (Department of the Interior)	$3,350	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.

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 $16.2 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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.

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