Top 40 Contractors in PSC B502: Air Quality Analysis, FY2024

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Air Resource Specialists, Inc. Top agencies DOI (Department of the Interior)	$3,569,013	31.7%	Rank history: #4 in FY2021, #2 in FY2022, #1 in FY2023 and #2 in FY2025; unchanged since FY2023.
2	State of California Controllers Office 2 awardees, including University of California, Davis Top agencies DOI (Department of the Interior)	$3,557,734	31.6%	Rank history: #2 in FY2021, #1 in FY2022, #2 in FY2023 and not on the FY2025 list; unchanged since FY2023.
3	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$1,152,168	10.2%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2025; new.
4	Nevada System of Higher Education Top agencies DOI (Department of the Interior)	$870,260	7.7%	Rank history: not on the FY2021 list, #5 in FY2022, #4 in FY2023 and #4 in FY2025; unchanged since FY2023.
5	Research Triangle Institute Top agencies DOI (Department of the Interior)	$432,720	3.8%	Rank history: #6 in FY2021, #6 in FY2022, #7 in FY2023 and #6 in FY2025; up 2 since FY2023.
6	Pinyon Environmental Inc. Top agencies DOI (Department of the Interior)	$301,044	2.7%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
7	WSP USA Environment & Infrastructure Inc. Top agencies DOI (Department of the Interior)	$244,844	2.2%	Rank history: #30 in FY2021, #8 in FY2022, not on the FY2023 list and #7 in FY2025; returned.
8	AECOM Through Environmental Management & Planning Solutions LLC Top agencies DOI (Department of the Interior)	$95,792	0.8%	Rank history: not on the FY2021–FY2023 lists and #14 in FY2025; new.
9	UV Partners, Inc. Top agencies Army (Department of the Army)	$88,952	0.8%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
10	Mabbett & Associates, Inc. Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior)	$64,390	0.6%	Rank history: #23 in FY2021, #19 in FY2022, not on the FY2023 list and #9 in FY2025; returned.
11	Aehs Incorporated Top agencies DHA (Defense Health Agency)	$60,415	0.5%	Rank history: #35 in FY2021, #11 in FY2022, #15 in FY2023 and #13 in FY2025; up 4 since FY2023.
12	Itms - GES JV LLC Top agencies DOI (Department of the Interior)	$58,689	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
13	Environmental Consulting Group, Inc. Top agencies Treasury (Department of the Treasury)	$56,267	0.5%	Rank history: #13 in FY2021, #13 in FY2022, #16 in FY2023 and not on the FY2025 list; up 3 since FY2023.
14	Syft Technologies, Inc. Top agencies EPA (Environmental Protection Agency)	$54,066	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
15	Spectral Platforms Inc. Top agencies HHS (Department of Health and Human Services)	$48,439	0.4%	Rank history: not on the FY2021–FY2022 lists, #8 in FY2023 and #23 in FY2025; down 7 since FY2023.
16	Satori Defense LLC Top agencies VA (Department of Veterans Affairs)	$48,000	0.4%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2025; new.
17	SPI Contracting LLC Top agencies VA (Department of Veterans Affairs)	$45,600	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
18	Janicke GBR Ingenieurbüro FÜR Umweltphysik Top agencies DOT (Department of Transportation)	$42,000	0.4%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2025; new.
19	GFS Supply & Services Company, Inc. Top agencies Navy (Department of the Navy)	$39,155	0.3%	Rank history: not on the FY2021 list, #17 in FY2022, #21 in FY2023 and not on the FY2025 list; up 2 since FY2023.
20	Advance Safety Equipment Co. Top agencies Navy (Department of the Navy)	$35,116	0.3%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2025; new.
21	Aquehs, Corp Top agencies DOI (Department of the Interior)	$34,500	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
22	Phase Associates LLC Top agencies Army (Department of the Army) DOI (Department of the Interior)	$31,897	0.3%	Rank history: #20 in FY2021, #20 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
23	Metcut Research Associates Inc. Top agencies NASA (National Aeronautics and Space Administration)	$28,641	0.3%	Rank history: not on the FY2021–FY2023 lists and #34 in FY2025; new.
24	State Health Services Texas Department of Through Texas Commission On Environmental Quality Top agencies USAF (Department of the Air Force)	$22,280	0.2%	Rank history: not on the FY2021 list, #26 in FY2022, #27 in FY2023 and not on the FY2025 list; up 3 since FY2023.
25	Titan Environmental Solutions, Inc. Top agencies Navy (Department of the Navy)	$20,545	0.2%	Rank history: not on the FY2021 list, #33 in FY2022, not on the FY2023 list and #25 in FY2025; returned.
26	Air Technology Laboratories, Inc. Top agencies EPA (Environmental Protection Agency)	$19,080	0.2%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023 and not on the FY2025 list; up 9 since FY2023.
27	Trine Environmental Inc. Top agencies VA (Department of Veterans Affairs)	$18,117	0.2%	Rank history: not on the FY2021 list, #25 in FY2022, not on the FY2023 list and #8 in FY2025; returned.
28	E & S Environmental Chemistry, Inc. Top agencies DOI (Department of the Interior)	$15,000	0.1%	Rank history: #12 in FY2021, #12 in FY2022, #23 in FY2023 and not on the FY2025 list; down 5 since FY2023.
29	Titan Global USA LLC Top agencies VA (Department of Veterans Affairs)	$12,302	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
30	Sage-Efs JV Top agencies VA (Department of Veterans Affairs)	$10,280	0.1%	Rank history: not on the FY2021 list, #30 in FY2022, not on the FY2023 list and #31 in FY2025; returned.
31	Ati, Inc. Top agencies NARA (National Archives and Records Administration) DOI (Department of the Interior)	$10,050	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
32	CTG Environmental, LLC Top agencies DFAS (Defense Finance and Accounting Service)	$9,300	0.1%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2025; new.
33	Environmental Science Corporation Top agencies Army (Department of the Army)	$7,292	0.1%	Rank history: not on the FY2021 list, #32 in FY2022, #37 in FY2023 and not on the FY2025 list; up 4 since FY2023.
34	Powell, Dale E. Top agencies USDA (Department of Agriculture)	$7,092	0.1%	Rank history: #38 in FY2021, #39 in FY2022, #42 in FY2023 and not on the FY2025 list; up 8 since FY2023.
35	Applied Water Technology, Inc. Top agencies DOJ (Department of Justice)	$5,800	0.1%	Rank history: #41 in FY2021, #41 in FY2022, #43 in FY2023 and not on the FY2025 list; up 8 since FY2023.
36	Cteh Government Services LLC Top agencies VA (Department of Veterans Affairs)	$4,500	<0.1%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2025; new.
37	GPC Consolidated Reporting Top agencies USDA (Department of Agriculture)	$4,003	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
38	EI Group Inc. Top agencies USAF (Department of the Air Force)	$3,270	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
39	Texas Research International Inc. Through Tri Airtesting Inc. Top agencies Navy (Department of the Navy)	$2,016	<0.1%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2023 and not on the FY2025 list; up 10 since FY2023.
40	Kisiel Edward A Top agencies DOI (Department of the Interior)	$495	<0.1%	Rank history: #42 in FY2021, #42 in FY2022, #46 in FY2023 and not on the FY2025 list; up 6 since FY2023.

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 $11.3 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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