Top 82 Contractors in PSC Z1NB: Maintenance of Heating and Cooling Plants, Jul 2025–Jun 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Qcm, Inc. Top agencies WHS (DOD Washington Headquarters Service)	$9,285,581	27.6%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023, #2 in FY2024 and #3 in FY2025; up 1 since Jul 2024–Jun 2025.
2	Energy Systems Group, LLC Top agencies NASA (National Aeronautics and Space Administration)	$5,915,745	17.6%	Rank history: not on the FY2021–FY2023 lists, #5 in FY2024 and #2 in FY2025; up 2 since Jul 2024–Jun 2025.
3	RWH Capital LLC Top agencies VA (Department of Veterans Affairs)	$3,419,598	10.2%	Rank history: not on the FY2021–FY2024 lists and #6 in FY2025; up 4 since Jul 2024–Jun 2025.
4	Performanceepc-Greenland JV LLC Top agencies VA (Department of Veterans Affairs)	$1,732,871	5.2%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #7 in FY2025; up 5 since Jul 2024–Jun 2025.
5	Capitol United Solutions Inc. Top agencies Navy (Department of the Navy)	$1,550,440	4.6%	Rank history: not on the FY2021–FY2024 lists and #4 in FY2025; up 1 since Jul 2024–Jun 2025.
6	Coho Technology Solutions, LLC Top agencies Navy (Department of the Navy)	$1,504,148	4.5%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; new, not ranked in Jul 2024–Jun 2025.
7	Caldaia Controls LLC Top agencies VA (Department of Veterans Affairs)	$1,046,017	3.1%	Rank history: #51 in FY2021, #58 in FY2022, #50 in FY2023, #31 in FY2024 and #12 in FY2025; up 9 since Jul 2024–Jun 2025.
8	EWA Direction Inc. Top agencies VA (Department of Veterans Affairs)	$648,140	1.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
9	Venergy Group LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$625,784	1.9%	Rank history: not on the FY2021–FY2023 lists, #27 in FY2024 and #9 in FY2025; up 3 since Jul 2024–Jun 2025.
10	White Harvest Energy LLC Top agencies VA (Department of Veterans Affairs)	$440,755	1.3%	Rank history: not on the FY2021 list, #6 in FY2022, #10 in FY2023, #17 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
11	Reagent World Inc Top agencies DOI (Department of the Interior) DOS (Department of State)	$416,434	1.2%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; new, not ranked in Jul 2024–Jun 2025.
12	Ecolab Inc. Through Nalco Company LLC Top agencies DOJ (Department of Justice)	$397,477	1.2%	Rank history: not on the FY2021–FY2024 lists and #18 in FY2025; up 9 since Jul 2024–Jun 2025.
13	Aktarius LLC Top agencies Navy (Department of the Navy)	$355,429	1.1%	Rank history: not on the FY2021–FY2023 lists, #21 in FY2024 and #19 in FY2025; up 10 since Jul 2024–Jun 2025.
14	Trane U.s. Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$336,908	1.0%	Rank history: #22 in FY2021, #23 in FY2022, #19 in FY2023, #26 in FY2024 and #10 in FY2025; unchanged since Jul 2024–Jun 2025.
15	Accord Federal Services, LLC Top agencies Army (Department of the Army)	$255,940	0.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
16	Government Contracting Resources, Inc. Top agencies Navy (Department of the Navy)	$249,298	0.7%	Rank history: #59 in FY2021, #39 in FY2022, not on the FY2023 list, #7 in FY2024 and #31 in FY2025; up 34 since Jul 2024–Jun 2025.
17	J Star Enterprises Inc. Top agencies USAF (Department of the Air Force)	$236,461	0.7%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; up 10 since Jul 2024–Jun 2025.
18	Daikin Applied Americas Inc Top agencies DOS (Department of State)	$233,504	0.7%	Rank history: not on the FY2021–FY2023 lists, #41 in FY2024 and #25 in FY2025; up 25 since Jul 2024–Jun 2025.
19	Siemens Industry Inc. Top agencies DOJ (Department of Justice)	$223,196	0.7%	Rank history: not on the FY2021–FY2023 lists, #25 in FY2024 and #26 in FY2025; up 15 since Jul 2024–Jun 2025.
20	Giraffeworks, LLC Top agencies USAF (Department of the Air Force)	$205,000	0.6%	Rank history: not on the FY2021–FY2024 lists and #29 in FY2025; new, not ranked in Jul 2024–Jun 2025.
21	Veteran First Technologies, LLC Top agencies VA (Department of Veterans Affairs)	$203,175	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
22	Valley Mechanical Inc. Top agencies VA (Department of Veterans Affairs)	$186,473	0.6%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2023, #34 in FY2024 and #21 in FY2025; up 6 since Jul 2024–Jun 2025.
23	Installatiebedrijf Embrechts B.V. Top agencies Army (Department of the Army)	$182,104	0.5%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; new, not ranked in Jul 2024–Jun 2025.
24	R & M Government Services Inc. Top agencies VA (Department of Veterans Affairs)	$172,167	0.5%	Rank history: not on the FY2021–FY2022 lists, #37 in FY2023, #39 in FY2024 and #41 in FY2025; up 21 since Jul 2024–Jun 2025.
25	Baha Construction Inc. Top agencies DOI (Department of the Interior)	$164,344	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
26	Rock Construction Management LLC Top agencies VA (Department of Veterans Affairs)	$154,340	0.5%	Rank history: not on the FY2021–FY2024 lists and #15 in FY2025; down 7 since Jul 2024–Jun 2025.
27	Johnson Controls Inc 2 awardees, including Johnson Controls Industries Top agencies USAF (Department of the Air Force) DOJ (Department of Justice) VA (Department of Veterans Affairs)	$153,071	0.5%	Rank history: not on the FY2021–FY2023 lists, #33 in FY2024 and #30 in FY2025; up 4 since Jul 2024–Jun 2025.
28	Nana Regional Corporation Inc. Through Jade Creek Construction LLC Top agencies DOJ (Department of Justice)	$147,121	0.4%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2023, #13 in FY2024 and #23 in FY2025; down 18 since Jul 2024–Jun 2025.
29	Prosperity Partners CR LLC Top agencies DOI (Department of the Interior)	$143,000	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
30	Mepvet LLC Top agencies VA (Department of Veterans Affairs)	$139,327	0.4%	Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; down 6 since Jul 2024–Jun 2025.
31	Osung Engineering Top agencies DOS (Department of State)	$135,995	0.4%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023, #79 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
32	Multistack LLC Top agencies DOS (Department of State)	$133,123	0.4%	Rank history: not on the FY2021–FY2023 lists, #44 in FY2024 and #34 in FY2025; up 4 since Jul 2024–Jun 2025.
33	Total Maintenance Inc. Top agencies Army (Department of the Army)	$130,668	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
34	American Engineering Corporation Top agencies OSD (Office of the Secretary of Defense)	$120,880	0.4%	Rank history: #49 in FY2021, #44 in FY2022, #47 in FY2023, #50 in FY2024 and #35 in FY2025; up 4 since Jul 2024–Jun 2025.
35	J&B Hartigan, Inc. Top agencies VA (Department of Veterans Affairs)	$102,386	0.3%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2023, #37 in FY2024 and #36 in FY2025; up 4 since Jul 2024–Jun 2025.
36	Porr Government Services Italy SRL Top agencies Army (Department of the Army)	$102,234	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
37	Infinity Cooling Expert SDN BHD Top agencies DOS (Department of State)	$100,972	0.3%	Rank history: not on the FY2021 list, #31 in FY2022, #36 in FY2023, #35 in FY2024 and #37 in FY2025; up 3 since Jul 2024–Jun 2025.
38	Firelake Construction Inc Top agencies USDA (Department of Agriculture)	$85,748	0.3%	Rank history: not on the FY2021–FY2023 lists, #18 in FY2024 and #39 in FY2025; down 18 since Jul 2024–Jun 2025.
39	Daikin Applied Latin America, L.L.C. Top agencies DOS (Department of State)	$80,777	0.2%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and #40 in FY2025; down 6 since Jul 2024–Jun 2025.
40	Veterans Choice Services LLC Top agencies VA (Department of Veterans Affairs)	$75,000	0.2%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and #53 in FY2025; down 11 since Jul 2024–Jun 2025.
41	Warrior Dynamics LLC Top agencies VA (Department of Veterans Affairs)	$73,728	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
42	Alaska Integrated Services, LLC Top agencies DOI (Department of the Interior)	$66,973	0.2%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; new, not ranked in Jul 2024–Jun 2025.
43	Temperature Technology, Inc. Top agencies USDA (Department of Agriculture)	$55,650	0.2%	Rank history: #33 in FY2021, #37 in FY2022, #27 in FY2023, #45 in FY2024 and #43 in FY2025; up 1 since Jul 2024–Jun 2025.
44	Mundus Services AD Top agencies DOS (Department of State)	$51,124	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
45	Ajce Corporation Top agencies DOI (Department of the Interior)	$50,950	0.2%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; new, not ranked in Jul 2024–Jun 2025.
46	CPF LLC Top agencies USDA (Department of Agriculture)	$50,015	0.1%	Rank history: #13 in FY2021, #7 in FY2022, #9 in FY2023, #4 in FY2024 and #16 in FY2025; down 43 since Jul 2024–Jun 2025.
47	ACE Gois LLC Top agencies DOS (Department of State)	$45,900	0.1%	Rank history: not on the FY2021–FY2022 lists, #52 in FY2023, #55 in FY2024 and #47 in FY2025; up 1 since Jul 2024–Jun 2025.
48	Istituto Italiano Del Marchio DI Qualita' S.P.A. Siglabile IMQ S.P.A. Top agencies Army (Department of the Army)	$44,671	0.1%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; new, not ranked in Jul 2024–Jun 2025.
49	GEC Zimbabwe (Private) Limited Top agencies DOS (Department of State)	$43,772	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
50	OMT Solutions, LLC Top agencies VA (Department of Veterans Affairs)	$39,721	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
51	Combustion Service & Equipment Co Top agencies DOJ (Department of Justice)	$37,635	0.1%	Rank history: not on the FY2021 list, #40 in FY2022, not on the FY2023 list, #65 in FY2024 and #49 in FY2025; unchanged since Jul 2024–Jun 2025.
52	Alabama Controls, Inc. Top agencies DOS (Department of State)	$36,214	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
53	Hwsi GMBH Top agencies DOS (Department of State)	$31,267	0.1%	Rank history: #56 in FY2021, #52 in FY2022, #54 in FY2023, #59 in FY2024 and #55 in FY2025; down 1 since Jul 2024–Jun 2025.
54	Mechanical Business Holdings LLC Top agencies DOJ (Department of Justice)	$31,220	0.1%	Rank history: not on the FY2021 list, #29 in FY2022, #57 in FY2023, #61 in FY2024 and #56 in FY2025; up 5 since Jul 2024–Jun 2025.
55	Temperature Control Services, L.L.C. Top agencies DOS (Department of State)	$30,780	0.1%	Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; new, not ranked in Jul 2024–Jun 2025.
56	Honeywell International Inc. Through Honeywell Aerospace International Inc. Top agencies DOS (Department of State)	$29,943	0.1%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2023, #6 in FY2024 and #51 in FY2025; new, not ranked in Jul 2024–Jun 2025.
57	Colonie Mechanical Contractors, Inc. Top agencies Army (Department of the Army)	$27,950	0.1%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; new, not ranked in Jul 2024–Jun 2025.
58	Water Chemistry Inc Top agencies Navy (Department of the Navy)	$27,132	0.1%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2023, #29 in FY2024 and #27 in FY2025; down 28 since Jul 2024–Jun 2025.
59	Biasci S.R.L. Top agencies Army (Department of the Army)	$26,721	0.1%	Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; new, not ranked in Jul 2024–Jun 2025.
60	Focused Asset Management LLC Top agencies DHS (Department of Homeland Security)	$25,590	0.1%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; new, not ranked in Jul 2024–Jun 2025.
61	Pacific Place Services LLC Top agencies DOS (Department of State)	$25,495	0.1%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; new, not ranked in Jul 2024–Jun 2025.
62	Texair Company Top agencies USDA (Department of Agriculture)	$25,405	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
63	Johnson Controls (India) Private Limited Top agencies DOS (Department of State)	$23,804	0.1%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; new, not ranked in Jul 2024–Jun 2025.
64	Powers of Arkansas Inc. Top agencies USDA (Department of Agriculture)	$20,800	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
65	Silver Lake - TMG Jv#1, LLC Top agencies DOJ (Department of Justice)	$20,160	0.1%	Rank history: not on the FY2021 list, #4 in FY2022, #8 in FY2023, not on the FY2024 list and #62 in FY2025; new, not ranked in Jul 2024–Jun 2025.
66	Air Masters Mechanical Inc. Top agencies Commerce (Department of Commerce)	$20,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
67	Global Service Titan LLC Top agencies DOS (Department of State)	$17,729	0.1%	Rank history: #58 in FY2021, not on the FY2022–FY2023 lists, #68 in FY2024 and #65 in FY2025; down 18 since Jul 2024–Jun 2025.
68	Condor Technologies, Inc. Top agencies Army (Department of the Army)	$16,745	<0.1%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023, #73 in FY2024 and #66 in FY2025; new, not ranked in Jul 2024–Jun 2025.
69	Carrier Rental Systems Inc Through Carrier (Thailand) Co Ltd Top agencies DOS (Department of State)	$16,723	<0.1%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023, #72 in FY2024 and #67 in FY2025; down 6 since Jul 2024–Jun 2025.
70	Bradley-Sciocchetti, Inc. Top agencies DHS (Department of Homeland Security)	$15,972	<0.1%	Rank history: not on the FY2021 list, #63 in FY2022, #66 in FY2023, #74 in FY2024 and #69 in FY2025; down 6 since Jul 2024–Jun 2025.
71	Hutchins Hvac Inc. Top agencies Navy (Department of the Navy)	$15,795	<0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; new, not ranked in Jul 2024–Jun 2025.
72	Barque Consulting, LLC Top agencies DHS (Department of Homeland Security)	$14,150	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
73	Sanei Thanks, K.K. Top agencies Army (Department of the Army)	$13,078	<0.1%	Rank history: not on the FY2021–FY2024 lists and #72 in FY2025; down 6 since Jul 2024–Jun 2025.
74	Windhoeker Kaltetechnik Services CC Top agencies DOS (Department of State)	$11,532	<0.1%	Rank history: not on the FY2021–FY2023 lists, #82 in FY2024 and #74 in FY2025; down 6 since Jul 2024–Jun 2025.
75	RJY Group LLC Top agencies Commerce (Department of Commerce) VA (Department of Veterans Affairs)	$10,569	<0.1%	Rank history: #27 in FY2021, #18 in FY2022, #24 in FY2023, #47 in FY2024 and #71 in FY2025; down 9 since Jul 2024–Jun 2025.
76	Lewis Heating and A / C, LLC Top agencies USDA (Department of Agriculture)	$9,750	<0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; new, not ranked in Jul 2024–Jun 2025.
77	Pueblo Mechanical and Controls, LLC Top agencies DOI (Department of the Interior)	$9,041	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
78	Axiom Builders Inc. Top agencies DOI (Department of the Interior)	$9,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; new, not ranked in Jul 2024–Jun 2025.
79	Arctic Air and Heat, L.L.C. Top agencies DOI (Department of the Interior)	$7,064	<0.1%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; new, not ranked in Jul 2024–Jun 2025.
80	NW Electric Inc. Top agencies DOI (Department of the Interior)	$3,956	<0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; new, not ranked in Jul 2024–Jun 2025.
81	Fortis Industries LLC Top agencies Navy (Department of the Navy)	$2,850	<0.1%	Rank history: #15 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
82	GEC Industrial Boilers Top agencies DOS (Department of State)	$1,073	<0.1%	Rank history: #44 in FY2021, #42 in FY2022, #44 in FY2023, #49 in FY2024 and #45 in FY2025; down 36 since Jul 2024–Jun 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 $33.6 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.
• 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 Jul 2024–Jun 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