Top 32 Contractors in PSC F101: Air Quality Support Services, FY2025

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Research Triangle Institute Top agencies EPA (Environmental Protection Agency)	$2,566,296	24.7%	Rank history: #2 in FY2021, #1 in FY2022, #2 in FY2023 and #2 in FY2024; up 1 since FY2024.
2	University of North Carolina At Chapel Hill Top agencies EPA (Environmental Protection Agency)	$1,173,694	11.3%	Rank history: #3 in FY2021, #5 in FY2022, #3 in FY2023 and #3 in FY2024; up 1 since FY2024.
3	Verina-Renova JV LLC Top agencies Army (Department of the Army)	$1,162,940	11.2%	Rank history: not on the FY2021–FY2024 lists; new.
4	Q & A Diversified LLC Top agencies Army (Department of the Army)	$869,541	8.4%	Rank history: not on the FY2021–FY2024 lists; new.
5	Bluestone Interspec JV, LLC Top agencies Navy (Department of the Navy)	$679,519	6.5%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2023 and #8 in FY2024; up 3 since FY2024.
6	American Testing, Inc. Top agencies HHS (Department of Health and Human Services)	$454,790	4.4%	Rank history: #4 in FY2021, #7 in FY2022, #5 in FY2023 and #5 in FY2024; down 1 since FY2024.
7	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$413,726	4.0%	Rank history: #1 in FY2021, #2 in FY2022, #1 in FY2023 and #1 in FY2024; down 6 since FY2024.
8	Wilbur Technical Services LLC Top agencies DOS (Department of State)	$404,800	3.9%	Rank history: #12 in FY2021, #4 in FY2022, #4 in FY2023 and #4 in FY2024; down 4 since FY2024.
9	Techlaw Consultants Inc. Top agencies EPA (Environmental Protection Agency)	$256,682	2.5%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2024; down 2 since FY2024.
10	Teya Enterprises LLC Top agencies Navy (Department of the Navy)	$208,869	2.0%	Rank history: not on the FY2021 list, #10 in FY2022, #7 in FY2023 and #10 in FY2024; unchanged since FY2024.
11	Air Resource Specialists, Inc. Top agencies EPA (Environmental Protection Agency)	$202,181	1.9%	Rank history: #7 in FY2021, #9 in FY2022, #10 in FY2023 and #20 in FY2024; up 9 since FY2024.
12	Brand Construction LLC Top agencies VA (Department of Veterans Affairs)	$149,999	1.4%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2024; unchanged since FY2024.
13	Environmental Science Corporation Top agencies Navy (Department of the Navy)	$93,981	0.9%	Rank history: #9 in FY2021, not on the FY2022 list, #14 in FY2023 and not on the FY2024 list; returned.
14	Bluestone Environmental Group, Inc. Top agencies DHS (Department of Homeland Security)	$71,728	0.7%	Rank history: not on the FY2021–FY2024 lists; new.
15	I-2-I Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$64,875	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
16	Thunderbird-Hrp JV LLC Top agencies USDA (Department of Agriculture)	$59,015	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
17	Terracon Consultants, Inc. Top agencies DOT (Department of Transportation)	$38,877	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
18	Ghdsystems LLC Top agencies DOI (Department of the Interior)	$38,375	0.4%	Rank history: not on the FY2021 list, #13 in FY2022, #16 in FY2023 and not on the FY2024 list; returned.
19	Trine Environmental Inc. Top agencies VA (Department of Veterans Affairs)	$37,556	0.4%	Rank history: #25 in FY2021, #16 in FY2022 and not on the FY2023–FY2024 lists; returned.
20	Kane Environmental Inc Top agencies Navy (Department of the Navy)	$36,803	0.4%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2023 and #18 in FY2024; down 2 since FY2024.
21	Ridelinks Inc. Top agencies VA (Department of Veterans Affairs)	$34,367	0.3%	Rank history: #13 in FY2021, #11 in FY2022, #12 in FY2023 and #11 in FY2024; down 10 since FY2024.
22	Caldaia Controls LLC Top agencies VA (Department of Veterans Affairs)	$32,524	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
23	Industrial Hygiene and Safety Technology, Inc. Top agencies DOT (Department of Transportation)	$32,398	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
24	Colorado Department of Public Health & Environment Top agencies DOI (Department of the Interior)	$28,500	0.3%	Rank history: not on the FY2021 list, #26 in FY2022, not on the FY2023 list and #24 in FY2024; unchanged since FY2024.
25	Vigilife, Inc. Top agencies DOI (Department of the Interior)	$24,999	0.2%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2024; up 5 since FY2024.
26	Windjammer Environmental LLC Top agencies VA (Department of Veterans Affairs)	$21,714	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
27	Global Service Titan LLC Top agencies DOS (Department of State)	$15,488	0.1%	Rank history: not on the FY2021–FY2023 lists and #29 in FY2024; up 2 since FY2024.
28	Criterion Laboratories Inc. Top agencies VA (Department of Veterans Affairs)	$15,005	0.1%	Rank history: not on the FY2021 list, #15 in FY2022, #32 in FY2023 and not on the FY2024 list; returned.
29	Elemental Air LLC Top agencies USDA (Department of Agriculture)	$9,145	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
30	Green 2 Green Consulting LLC Top agencies Army (Department of the Army)	$8,557	0.1%	Rank history: #31 in FY2021, #25 in FY2022, #22 in FY2023 and #21 in FY2024; down 9 since FY2024.
31	Trinity Consultants Inc. Top agencies DOJ (Department of Justice)	$5,100	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
32	Burychka DRT LLC Top agencies Navy (Department of the Navy)	$2,704	<0.1%	Rank history: not on the FY2021–FY2024 lists; 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 $10.4 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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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