Top 42 Contractors in PSC 6636: Environmental Chambers and Related Equipment, FY2025

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Cedarville Engineering Group LLC Top agencies Army (Department of the Army)	$13,344,839	74.6%	Rank history: not on the FY2021–FY2024 lists; new.
2	Percival Scientific Incorporated Top agencies USDA (Department of Agriculture) Army (Department of the Army)	$610,528	3.4%	Rank history: #11 in FY2021, #20 in FY2022, #14 in FY2023 and #11 in FY2024; up 9 since FY2024.
3	Integrated Development & Manufacturing Company Top agencies USDA (Department of Agriculture)	$454,812	2.5%	Rank history: not on the FY2021 list, #44 in FY2022 and not on the FY2023–FY2024 lists; returned.
4	Aantilia LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$351,622	2.0%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2024; up 8 since FY2024.
5	Kurt J Lesker Co Top agencies Navy (Department of the Navy)	$297,616	1.7%	Rank history: #9 in FY2021 and not on the FY2022–FY2024 lists; returned.
6	PPG Industries, Inc. Top agencies USAF (Department of the Air Force)	$279,638	1.6%	Rank history: not on the FY2021 list, #7 in FY2022, #6 in FY2023 and #14 in FY2024; up 8 since FY2024.
7	Wraith Technologies, Inc. Top agencies Army (Department of the Army)	$268,608	1.5%	Rank history: not on the FY2021–FY2023 lists and #57 in FY2024; up 50 since FY2024.
8	Bondtech Corp Top agencies Navy (Department of the Navy)	$245,200	1.4%	Rank history: not on the FY2021–FY2024 lists; new.
9	Darwin Chambers Co LLC Top agencies Commerce (Department of Commerce)	$229,768	1.3%	Rank history: not on the FY2021–FY2022 lists, #13 in FY2023 and #19 in FY2024; up 10 since FY2024.
10	Team Corporation Top agencies Navy (Department of the Navy)	$185,684	1.0%	Rank history: not on the FY2021–FY2024 lists; new.
11	Copper Collar Group LLC Top agencies USAF (Department of the Air Force)	$166,182	0.9%	Rank history: not on the FY2021–FY2024 lists; new.
12	Ametek Inc. 2 awardees, including Advanced Measurement Technology Inc. and Sunpower, Inc. Top agencies Navy (Department of the Navy)	$162,640	0.9%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2023 and not on the FY2024 list; returned.
13	TPS LLC Top agencies DOT (Department of Transportation) Navy (Department of the Navy)	$110,998	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
14	Michael Renka Export GMBH Top agencies Army (Department of the Army)	$95,060	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
15	RDP Corporation Top agencies Navy (Department of the Navy)	$84,520	0.5%	Rank history: not on the FY2021 list, #26 in FY2022, not on the FY2023 list and #13 in FY2024; down 2 since FY2024.
16	Amphenol Corporation Through PCB Piezotronics, Inc. Top agencies Navy (Department of the Navy)	$63,080	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
17	Abbess Instruments and Systems, Inc. Top agencies USAF (Department of the Air Force)	$62,000	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
18	MG Scientific, Inc. Top agencies USDA (Department of Agriculture)	$57,022	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
19	Biolog, Inc. Through Anaerobe Systems Top agencies Commerce (Department of Commerce)	$44,000	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
20	P & G Manufacturing of Washington, Inc. Top agencies USDA (Department of Agriculture)	$41,200	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
21	Tropospheric Measurement Systems Inc. Top agencies EPA (Environmental Protection Agency)	$40,817	0.2%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2024; up 3 since FY2024.
22	System of Systems, Inc. Top agencies DHA (Defense Health Agency)	$38,880	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
23	Aerospace Control Products, Inc. Top agencies Navy (Department of the Navy)	$37,500	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
24	Arhab LLC Top agencies Navy (Department of the Navy)	$31,137	0.2%	Rank history: not on the FY2021–FY2023 lists and #18 in FY2024; down 6 since FY2024.
25	Wrigglesworth Enterprises Inc. Top agencies DOI (Department of the Interior)	$27,898	0.2%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2023 and not on the FY2024 list; returned.
26	C.h. Krammes & Co., Inc. Top agencies Smithsonian (Smithsonian Institution)	$25,907	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
27	Attestor Forensics US Inc. Top agencies DHS (Department of Homeland Security)	$25,261	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
28	Unique Technology Systems LLC Top agencies Army (Department of the Army)	$24,869	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
29	Digi International Inc. Top agencies DHA (Defense Health Agency)	$24,442	0.1%	Rank history: not on the FY2021 list, #37 in FY2022, #30 in FY2023 and #47 in FY2024; up 18 since FY2024.
30	Thomas Scientific, LLC Top agencies DHS (Department of Homeland Security)	$21,346	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
31	Saje Technology LLC Top agencies VA (Department of Veterans Affairs)	$20,245	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
32	T.g.m., Inc. Top agencies Commerce (Department of Commerce)	$17,910	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
33	Para-Gear Equipment Co Top agencies Army (Department of the Army)	$17,500	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
34	Sign Solutions Usa, LLC Top agencies Army (Department of the Army)	$16,875	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
35	RJH Air Conditioning and Refrigeration Service L.L.C. Top agencies NARA (National Archives and Records Administration)	$15,391	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
36	Desert Environmental Services, Inc. Top agencies DOJ (Department of Justice)	$15,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
37	American Industrial Hygiene Association Top agencies USAF (Department of the Air Force)	$12,770	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
38	Linde Public Limited Company Through Linde Engineering North America LLC Top agencies NASA (National Aeronautics and Space Administration)	$12,000	0.1%	Rank history: not on the FY2021–FY2023 lists and #2 in FY2024; down 36 since FY2024.
39	Emerald Scientific LLC Top agencies Treasury (Department of the Treasury)	$11,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
40	Sanatron, Inc. Top agencies Navy (Department of the Navy)	$10,204	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
41	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$7,728	<0.1%	Rank history: not on the FY2021–FY2023 lists and #56 in FY2024; up 15 since FY2024.
42	Vertex LLC Top agencies DLA (Defense Logistics Agency)	$5,242	<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 $17.9 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.

Quick answers