Top 30 Contractors in PSC R428: Industrial Hygienics, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Dgi-Ati II LLC Top agencies WHS (DOD Washington Headquarters Service)	$4,110,684	33.7%	Rank history: not on the FY2021–FY2024 lists and #1 in FY2025; unchanged since Aug 2024–Jul 2025.
2	Cydecor Inc. Top agencies Navy (Department of the Navy)	$3,887,442	31.8%	Rank history: not on the FY2021 list, #4 in FY2022, not on the FY2023 list, #3 in FY2024 and #2 in FY2025; unchanged since Aug 2024–Jul 2025.
3	JH1 Consultants, LLC Top agencies Army (Department of the Army)	$394,106	3.2%	Rank history: #19 in FY2021, #15 in FY2022, #19 in FY2023, #10 in FY2024 and #10 in FY2025; up 9 since Aug 2024–Jul 2025.
4	Cfol International Inc. Top agencies Army (Department of the Army)	$385,259	3.2%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; up 4 since Aug 2024–Jul 2025.
5	Consolidated Safety Services Incorporated Top agencies HHS (Department of Health and Human Services)	$383,615	3.1%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2023, #4 in FY2024 and #3 in FY2025; down 2 since Aug 2024–Jul 2025.
6	Aehs Incorporated Top agencies DHA (Defense Health Agency)	$362,435	3.0%	Rank history: not on the FY2021 list, #22 in FY2022, #11 in FY2023, #8 in FY2024 and #8 in FY2025; up 3 since Aug 2024–Jul 2025.
7	Cayuse Holdings LLC Through Cayuse Technologies, LLC Top agencies Treasury (Department of the Treasury)	$264,176	2.2%	Rank history: not on the FY2021–FY2023 lists, #5 in FY2024 and #4 in FY2025; down 2 since Aug 2024–Jul 2025.
8	Cenpec, LLC Top agencies Treasury (Department of the Treasury)	$231,185	1.9%	Rank history: not on the FY2021–FY2023 lists, #12 in FY2024 and #11 in FY2025; up 5 since Aug 2024–Jul 2025.
9	Aurora Industrial Hygiene Top agencies Army (Department of the Army)	$213,180	1.7%	Rank history: not on the FY2021–FY2023 lists, #14 in FY2024 and #12 in FY2025; up 5 since Aug 2024–Jul 2025.
10	Property & Environmental Management Inc. Top agencies DOJ (Department of Justice)	$179,009	1.5%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2023, #21 in FY2024 and #21 in FY2025; up 26 since Aug 2024–Jul 2025.
11	Rogue Industries LLC Top agencies VA (Department of Veterans Affairs)	$178,725	1.5%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #13 in FY2025; down 1 since Aug 2024–Jul 2025.
12	Afs-Iei JV, LLC Top agencies USDA (Department of Agriculture)	$150,214	1.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
13	Bonus Environmental LLC Top agencies Army (Department of the Army)	$131,440	1.1%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2023, #24 in FY2024 and #16 in FY2025; up 12 since Aug 2024–Jul 2025.
14	Pika International Inc. Top agencies Army (Department of the Army)	$127,163	1.0%	Rank history: not on the FY2021–FY2023 lists, #32 in FY2024 and #14 in FY2025; up 8 since Aug 2024–Jul 2025.
15	H & L Environmental Services, LLC Top agencies Army (Department of the Army)	$113,170	0.9%	Rank history: not on the FY2021–FY2023 lists, #18 in FY2024 and #17 in FY2025; up 5 since Aug 2024–Jul 2025.
16	Alliant Corporation Top agencies VA (Department of Veterans Affairs)	$84,800	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
17	Thunderbird Environmental, LLC Top agencies VA (Department of Veterans Affairs)	$82,988	0.7%	Rank history: #27 in FY2021, #27 in FY2022, #20 in FY2023, #25 in FY2024 and #20 in FY2025; up 7 since Aug 2024–Jul 2025.
18	Mabbett & Associates, Inc. Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration)	$73,193	0.6%	Rank history: #12 in FY2021, #12 in FY2022, #16 in FY2023, #13 in FY2024 and #5 in FY2025; down 12 since Aug 2024–Jul 2025.
19	Fitzroy Environmental Consulting Inc. Top agencies Army (Department of the Army)	$70,864	0.6%	Rank history: #17 in FY2021, #42 in FY2022, #31 in FY2023, #29 in FY2024 and not on the FY2025 list; up 10 since Aug 2024–Jul 2025.
20	Apex Environmental Management, Inc. Top agencies Army (Department of the Army)	$53,861	0.4%	Rank history: not on the FY2021 list, #16 in FY2022, #23 in FY2023, #26 in FY2024 and #22 in FY2025; up 6 since Aug 2024–Jul 2025.
21	Environmental Health & Safety Services, Inc. Top agencies VA (Department of Veterans Affairs)	$49,020	0.4%	Rank history: not on the FY2021–FY2022 lists, #32 in FY2023, #33 in FY2024 and #25 in FY2025; up 16 since Aug 2024–Jul 2025.
22	Best Choice Environmental Inc. Top agencies VA (Department of Veterans Affairs)	$47,439	0.4%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2023, #31 in FY2024 and #26 in FY2025; up 9 since Aug 2024–Jul 2025.
23	Allone Health Resources Inc. Through FEI Behavioral Health, Inc. Top agencies Army (Department of the Army)	$42,889	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
24	JWJ Consulting, LLC Top agencies Army (Department of the Army)	$39,700	0.3%	Rank history: #24 in FY2021, #25 in FY2022, #35 in FY2023, #16 in FY2024 and #31 in FY2025; down 5 since Aug 2024–Jul 2025.
25	Stericycle Inc Top agencies VA (Department of Veterans Affairs)	$35,917	0.3%	Rank history: not on the FY2021 list, #47 in FY2022, #34 in FY2023, #35 in FY2024 and #29 in FY2025; up 9 since Aug 2024–Jul 2025.
26	Environmental Health and Safety Solutions, LLC Top agencies Army (Department of the Army)	$34,312	0.3%	Rank history: #30 in FY2021, #28 in FY2022, #14 in FY2023, #36 in FY2024 and #30 in FY2025; up 9 since Aug 2024–Jul 2025.
27	QTS Group LLC Top agencies Army (Department of the Army)	$20,000	0.2%	Rank history: not on the FY2021–FY2023 lists, #27 in FY2024 and #36 in FY2025; unchanged since Aug 2024–Jul 2025.
28	Yellow Bridge LLC Top agencies DHA (Defense Health Agency)	$11,838	0.1%	Rank history: not on the FY2021 list, #56 in FY2022, #44 in FY2023, #43 in FY2024 and #35 in FY2025; up 14 since Aug 2024–Jul 2025.
29	Credere Associates, LLC Top agencies Navy (Department of the Navy)	$6,090	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
30	TECH Scan Inc. Top agencies VA (Department of Veterans Affairs)	$2,970	<0.1%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; up 15 since 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 $12.2 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. 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