Top 100 Contractors in PSC J041: Maintenance, Repair and Rebuilding of Equipment: Refrigeration, Air Conditioning, and Air Circulating Equipment, FY2024

Name: Top 100 Contractors in PSC J041: Maintenance, Repair and Rebuilding of Equipment: Refrigeration, Air Conditioning, and Air Circulating Equipment, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 23% of FY2024 PSC J041 contract dollars

Contract obligations: $325,172,688 Net of deobligations, by contracts coded PSC J041
Contractors: 839 Parent companies with an obligation
Largest contractor: American Engineering Corporation $12.9 million, 3.8% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	American Engineering Corporation 2 awardees Top agencies DODEA (Department of Defense Education Activity) Army (Department of the Army) Navy (Department of the Navy)	$12,883,101	3.8%	Rank history: #3 in FY2021, #2 in FY2022, #2 in FY2023 and #20 in FY2025; up 1 since FY2023.
2	UD Contracting Inc. Top agencies Army (Department of the Army)	$9,320,889	2.7%	Rank history: #5 in FY2021, #3 in FY2022, #4 in FY2023 and not on the FY2025 list; up 2 since FY2023.
3	Johnson Controls Inc 2 awardees, including Johnson Controls Fire Protection LP Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) Navy (Department of the Navy)	$8,038,906	2.4%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2025; new.
4	Butt Construction Company, Incorporated Top agencies Army (Department of the Army)	$7,909,500	2.3%	Rank history: not on the FY2021–FY2023 lists and #56 in FY2025; new.
5	Native Energy & Technology Inc. Top agencies DHS (Department of Homeland Security)	$7,273,221	2.1%	Rank history: #4 in FY2021, #5 in FY2022, #10 in FY2023 and #6 in FY2025; up 5 since FY2023.
6	Mechanical Resources Incorporated Top agencies Navy (Department of the Navy)	$7,101,389	2.1%	Rank history: #8 in FY2021, #4 in FY2022, not on the FY2023 list and #7 in FY2025; up 314 since FY2023.
7	Aktarius LLC Top agencies Navy (Department of the Navy)	$7,080,178	2.1%	Rank history: not on the FY2021–FY2023 lists and #4 in FY2025; new.
8	Energy Systems Group, LLC Top agencies Army (Department of the Army)	$6,274,639	1.8%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2025; new.
9	Swan Contracting LLC Top agencies Navy (Department of the Navy)	$6,246,587	1.8%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
10	Trane U.s. Inc. 2 awardees Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) DOJ (Department of Justice)	$5,980,252	1.8%	Rank history: #12 in FY2021, #19 in FY2022, #9 in FY2023 and #5 in FY2025; down 1 since FY2023.
11	RJY Group LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$5,519,460	1.6%	Rank history: #40 in FY2021, #11 in FY2022, #15 in FY2023 and #16 in FY2025; up 4 since FY2023.
12	Hawaiian Native Corporation Through Aktarius LLC Top agencies Navy (Department of the Navy)	$5,244,505	1.5%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2023 and not on the FY2025 list; down 9 since FY2023.
13	Siemens Industry Inc. Top agencies VA (Department of Veterans Affairs) EPA (Environmental Protection Agency) USAF (Department of the Air Force)	$5,156,800	1.5%	Rank history: #87 in FY2021, not on the FY2022–FY2023 lists and #12 in FY2025; returned.
14	Four Tribes Enterprises, LLC Top agencies USAF (Department of the Air Force)	$5,148,408	1.5%	Rank history: #11 in FY2021, #9 in FY2022, #12 in FY2023 and #18 in FY2025; down 2 since FY2023.
15	JSK Diego Services LLC Top agencies Navy (Department of the Navy)	$5,041,439	1.5%	Rank history: not on the FY2021–FY2022 lists, #8 in FY2023 and #21 in FY2025; down 7 since FY2023.
16	Atlantic Refinishing & Restoration, Inc. Top agencies Army (Department of the Army)	$4,732,777	1.4%	Rank history: not on the FY2021 list, #63 in FY2022, #19 in FY2023 and not on the FY2025 list; up 3 since FY2023.
17	Amalgamated Services, Inc. 2 awardees Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$4,625,144	1.4%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2023 and not on the FY2025 list; up 38 since FY2023.
18	Bowhead Global Systems and Technology, LLC Top agencies Army (Department of the Army)	$4,466,894	1.3%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2025; new.
19	Brown Point Facility Management Solutions, LLC Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs) DISA (Defense Information Systems Agency)	$4,300,173	1.3%	Rank history: #88 in FY2021, #87 in FY2022, #24 in FY2023 and #26 in FY2025; up 5 since FY2023.
20	Refcon Services Inc Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$3,773,479	1.1%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2023 and #15 in FY2025; up 2 since FY2023.
21	NV Enterprises, Inc. Top agencies GSA (General Services Administration) SSA (Social Security Administration) Army (Department of the Army)	$3,536,237	1.0%	Rank history: not on the FY2021 list, #17 in FY2022, #31 in FY2023 and #19 in FY2025; up 10 since FY2023.
22	Pegasus Support Services LLC Top agencies GSA (General Services Administration)	$3,406,686	1.0%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2025; up 236 since FY2023.
23	MX Construction, Inc. Top agencies DOI (Department of the Interior)	$3,303,938	1.0%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 99 since FY2023.
24	Accord Federal Services, LLC 2 awardees Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$3,173,242	0.9%	Rank history: #13 in FY2021, #27 in FY2022, not on the FY2023 list and #36 in FY2025; up 91 since FY2023.
25	DE LA HOZ Builders Inc Top agencies USAF (Department of the Air Force)	$3,106,922	0.9%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2025; new.
26	Blue Cord Design and Construction, LLC Top agencies VA (Department of Veterans Affairs)	$2,978,352	0.9%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
27	Capitol United Solutions Inc. Top agencies DHS (Department of Homeland Security)	$2,899,817	0.9%	Rank history: not on the FY2021–FY2023 lists and #58 in FY2025; new.
28	DAE Sung LLC Top agencies GSA (General Services Administration) SSA (Social Security Administration) VA (Department of Veterans Affairs)	$2,875,243	0.8%	Rank history: #67 in FY2021, #76 in FY2022, #34 in FY2023 and #27 in FY2025; up 6 since FY2023.
29	Johnson Controls Industries 3 awardees, including Johnson Controls, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$2,786,325	0.8%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2023 and not on the FY2025 list; down 24 since FY2023.
30	Four Seasons Environmental Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$2,584,012	0.8%	Rank history: #20 in FY2021, #25 in FY2022, #35 in FY2023 and #33 in FY2025; up 5 since FY2023.
31	SKE Support Services GMBH Top agencies Army (Department of the Army)	$2,580,160	0.8%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
32	Pp91 Enterprises, Inc. Top agencies USAF (Department of the Air Force)	$2,578,770	0.8%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 143 since FY2023.
33	Ahntech Inc Top agencies DODEA (Department of Defense Education Activity)	$2,559,726	0.8%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2025; new.
34	Teamgov, Inc. Top agencies GSA (General Services Administration) Army (Department of the Army) DOJ (Department of Justice)	$2,555,838	0.8%	Rank history: not on the FY2021–FY2023 lists and #2 in FY2025; new.
35	Sossec Inc. Top agencies USAF (Department of the Air Force)	$2,291,992	0.7%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2023 and #91 in FY2025; down 7 since FY2023.
36	Sustainable Facilities Management Services LLC Top agencies Army (Department of the Army)	$2,288,147	0.7%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2025; new.
37	S E C Enterprises LLC Top agencies Army (Department of the Army)	$2,288,147	0.7%	Rank history: not on the FY2021–FY2023 lists and #94 in FY2025; new.
38	MCL Alliance, LLC Top agencies Army (Department of the Army)	$2,288,147	0.7%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2023 and #95 in FY2025; down 21 since FY2023.
39	The Ryan Group Inc Through Ryan & Associates, Inc. Top agencies Army (Department of the Army)	$2,204,400	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
40	Arabi Company WLL Top agencies Army (Department of the Army)	$2,088,349	0.6%	Rank history: not on the FY2021–FY2023 lists and #59 in FY2025; new.
41	J&B Hartigan, Inc. Top agencies VA (Department of Veterans Affairs)	$2,042,274	0.6%	Rank history: #46 in FY2021, #56 in FY2022, #53 in FY2023 and #44 in FY2025; up 12 since FY2023.
42	Brothers Mechanical Services LLC 2 awardees Top agencies DECA (Defense Commissary Agency) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$2,027,324	0.6%	Rank history: #43 in FY2021, #8 in FY2022, #87 in FY2023 and #65 in FY2025; up 45 since FY2023.
43	Modern International Inc. Top agencies USAF (Department of the Air Force)	$1,916,828	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
44	Siemens Aktiengesellschaft 2 awardees, including Siemens Industry Inc. and Siemens Government Technologies Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) USDA (Department of Agriculture)	$1,892,691	0.6%	Rank history: #16 in FY2021, #12 in FY2022, #32 in FY2023 and not on the FY2025 list; down 12 since FY2023.
45	Cooper Mechanical Inc. Top agencies VA (Department of Veterans Affairs)	$1,891,699	0.6%	Rank history: not on the FY2021 list, #94 in FY2022, #23 in FY2023 and not on the FY2025 list; down 22 since FY2023.
46	Prime Mechanical of Wisconsin LLC Top agencies USAF (Department of the Air Force)	$1,870,079	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
47	Washington Office Interiors LLC Top agencies Army (Department of the Army)	$1,859,271	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
48	Johnsondanforth, Inc. Top agencies VA (Department of Veterans Affairs)	$1,830,036	0.5%	Rank history: not on the FY2021 list, #41 in FY2022, not on the FY2023 list and #50 in FY2025; returned.
49	Southeastern Industrial Construction, LLC Top agencies USAF (Department of the Air Force)	$1,776,470	0.5%	Rank history: not on the FY2021 list, #26 in FY2022, #26 in FY2023 and not on the FY2025 list; down 23 since FY2023.
50	Satellite Services Inc. Top agencies GSA (General Services Administration) Navy (Department of the Navy)	$1,754,940	0.5%	Rank history: #78 in FY2021, #39 in FY2022, #42 in FY2023 and #32 in FY2025; down 8 since FY2023.
51	Integriward LLC Top agencies DHS (Department of Homeland Security)	$1,715,444	0.5%	Rank history: not on the FY2021–FY2022 lists, #25 in FY2023 and not on the FY2025 list; down 26 since FY2023.
52	Choice Sheetmetal LLC Top agencies Army (Department of the Army)	$1,709,335	0.5%	Rank history: not on the FY2021–FY2022 lists, #68 in FY2023 and #29 in FY2025; up 16 since FY2023.
53	Johnson Controls Security Solutions LLC Through Johnson Controls Inc. Top agencies USDA (Department of Agriculture) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$1,666,738	0.5%	Rank history: #1 in FY2021, #1 in FY2022, #20 in FY2023 and #61 in FY2025; down 33 since FY2023.
54	Magadia Consulting Inc. Top agencies Army (Department of the Army)	$1,523,630	0.4%	Rank history: #36 in FY2021, #29 in FY2022, #50 in FY2023 and not on the FY2025 list; down 4 since FY2023.
55	Chicago Iron Works Corporation Through National Air Duct Maintenance Corp Top agencies VA (Department of Veterans Affairs)	$1,519,452	0.4%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2023 and not on the FY2025 list; down 9 since FY2023.
56	Meptek Muhendislik Taahhut Ticaret Limited Sirketi Top agencies DOS (Department of State)	$1,496,426	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
57	Mark-Vii Enterprises, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$1,475,521	0.4%	Rank history: #83 in FY2021, #22 in FY2022, #44 in FY2023 and #89 in FY2025; down 13 since FY2023.
58	Government Contracting Resources, Inc. Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,468,329	0.4%	Rank history: not on the FY2021 list, #62 in FY2022, #43 in FY2023 and #60 in FY2025; down 15 since FY2023.
59	Daikin Applied Americas Inc 2 awardees, including CM3 Building Solutions Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$1,390,134	0.4%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2023 and #34 in FY2025; up 27 since FY2023.
60	TL Services, Inc. Top agencies VA (Department of Veterans Affairs)	$1,385,140	0.4%	Rank history: #27 in FY2021, #30 in FY2022, #41 in FY2023 and #49 in FY2025; down 19 since FY2023.
61	Johnson Controls Building Automation Systems, LLC Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) DOS (Department of State)	$1,344,846	0.4%	Rank history: not on the FY2021–FY2023 lists and #51 in FY2025; new.
62	Goodwill Industries of San Antonio Contract Services Top agencies USAF (Department of the Air Force)	$1,343,198	0.4%	Rank history: #42 in FY2021, #44 in FY2022, #56 in FY2023 and #54 in FY2025; down 6 since FY2023.
63	B2 Constructors, LLC Top agencies VA (Department of Veterans Affairs)	$1,334,990	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
64	C.r.w. Mechanical, Inc. Top agencies VA (Department of Veterans Affairs)	$1,331,940	0.4%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023 and #45 in FY2025; up 5 since FY2023.
65	TST Tactical Defense Solutions Inc. Top agencies Navy (Department of the Navy)	$1,300,000	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
66	Multi Air Services Engineers, Corp Top agencies VA (Department of Veterans Affairs)	$1,241,880	0.4%	Rank history: #25 in FY2021, #42 in FY2022, #51 in FY2023 and not on the FY2025 list; down 15 since FY2023.
67	DN Tanks, LLC Top agencies VA (Department of Veterans Affairs)	$1,212,615	0.4%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2023 and not on the FY2025 list; down 38 since FY2023.
68	Radice Enterprises, LLC Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$1,206,720	0.4%	Rank history: #55 in FY2021, #67 in FY2022, #90 in FY2023 and not on the FY2025 list; up 22 since FY2023.
69	Asi-Brymak JV Top agencies DODEA (Department of Defense Education Activity)	$1,164,416	0.3%	Rank history: #52 in FY2021, #60 in FY2022, #74 in FY2023 and not on the FY2025 list; up 5 since FY2023.
70	International Support Group LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$1,149,198	0.3%	Rank history: not on the FY2021 list, #48 in FY2022, #63 in FY2023 and not on the FY2025 list; down 7 since FY2023.
71	Chugach Alaska Corporation Through Chugach Solutions Enterprise, LLC Top agencies Navy (Department of the Navy)	$1,140,665	0.3%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023 and not on the FY2025 list; down 11 since FY2023.
72	Mvl-Bromgrove JV LLC Top agencies Navy (Department of the Navy)	$1,139,446	0.3%	Rank history: not on the FY2021 list, #28 in FY2022, #11 in FY2023 and #1 in FY2025; down 61 since FY2023.
73	Brand Construction LLC Top agencies VA (Department of Veterans Affairs)	$1,114,346	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
74	Four Winds Mechanical HTC / AC Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$1,107,477	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 219 since FY2023.
75	Reon Inc. Top agencies Treasury (Department of the Treasury) HHS (Department of Health and Human Services)	$1,098,794	0.3%	Rank history: #98 in FY2021, #64 in FY2022, #72 in FY2023 and #63 in FY2025; down 3 since FY2023.
76	Boland Trane Associates, Inc. Through Boland Trane Services Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$1,066,271	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 38 since FY2023.
77	Mig Gov, LLC Top agencies Navy (Department of the Navy)	$1,063,171	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
78	Dmyles Inc. Top agencies Army (Department of the Army)	$1,038,904	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
79	Black Construction / Mace International Joint Venture Top agencies DLA (Defense Logistics Agency)	$1,037,550	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
80	Water Treatment Services Inc. Top agencies VA (Department of Veterans Affairs)	$1,013,760	0.3%	Rank history: #56 in FY2021, #61 in FY2022, #71 in FY2023 and #69 in FY2025; down 9 since FY2023.
81	Jivg Enterprises LLC Top agencies VA (Department of Veterans Affairs) IBWC (International Boundary and Water Commission U.S.-Mexico)	$1,000,968	0.3%	Rank history: not on the FY2021 list, #65 in FY2022, #81 in FY2023 and #76 in FY2025; unchanged since FY2023.
82	Venergy Group LLC Top agencies VA (Department of Veterans Affairs) DHS (Department of Homeland Security)	$994,454	0.3%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2025; new.
83	Centerpoint Energy, Inc. Through Energy Systems Group, LLC Top agencies Army (Department of the Army)	$984,116	0.3%	Rank history: #2 in FY2021, #6 in FY2022, #13 in FY2023 and not on the FY2025 list; down 70 since FY2023.
84	Binary Exchange Technologies LLC Top agencies DOI (Department of the Interior)	$940,658	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
85	Purdy Group LLC Top agencies DOJ (Department of Justice)	$916,722	0.3%	Rank history: not on the FY2021 list, #55 in FY2022, #96 in FY2023 and #86 in FY2025; up 11 since FY2023.
86	UIC Government Services LLC Through Bowhead Global Systems and Technology, LLC Top agencies Army (Department of the Army)	$914,594	0.3%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2023 and not on the FY2025 list; down 50 since FY2023.
87	Cornerstone Construction Services, LLC Top agencies VA (Department of Veterans Affairs)	$859,311	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
88	Sherwood Avionics and Accessories, Inc. Top agencies USAF (Department of the Air Force)	$843,802	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
89	Orion Construction, Inc. Top agencies USAF (Department of the Air Force)	$830,209	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
90	Ritz Construction Inc. Top agencies USAF (Department of the Air Force)	$800,837	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
91	Kaiva-Signature JV, LLC Top agencies DOI (Department of the Interior)	$796,271	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
92	Honeywell International Inc. 6 awardees, including Honeywell Building Solutions GMBH Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$786,741	0.2%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and #52 in FY2025; down 16 since FY2023.
93	Capital Brand Group LLC Top agencies WHS (DOD Washington Headquarters Service) Navy (Department of the Navy)	$755,128	0.2%	Rank history: not on the FY2021–FY2023 lists and #14 in FY2025; up 14 since FY2023.
94	MIA General Contracting LLC Top agencies Army (Department of the Army)	$747,633	0.2%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2023 and not on the FY2025 list; down 73 since FY2023.
95	Sanford Federal, Inc. Top agencies USAF (Department of the Air Force) DOJ (Department of Justice) DFAS (Defense Finance and Accounting Service)	$746,174	0.2%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and not on the FY2025 list; down 17 since FY2023.
96	Ameritech Contracting LLC Top agencies VA (Department of Veterans Affairs)	$723,507	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
97	BJ Medical Supply Delivery Service LLC Top agencies VA (Department of Veterans Affairs)	$716,532	0.2%	Rank history: not on the FY2021 list, #68 in FY2022, #83 in FY2023 and not on the FY2025 list; down 14 since FY2023.
98	EWA Direction Inc. Top agencies VA (Department of Veterans Affairs)	$705,014	0.2%	Rank history: #99 in FY2021, #81 in FY2022, not on the FY2023 list and #62 in FY2025; up 51 since FY2023.
99	Chugach Solutions Enterprise, LLC Top agencies Navy (Department of the Navy)	$670,453	0.2%	Rank history: not on the FY2021 list, #57 in FY2022, not on the FY2023 list and #66 in FY2025; returned.
100	Isonic Corp Top agencies VA (Department of Veterans Affairs)	$667,771	0.2%	Rank history: not on the FY2021–FY2023 lists and #96 in FY2025; up 262 since FY2023.

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100 of 839 contractors listed here. See the rest on GovTribe.

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 $340 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.

Quick answers

Who were the top 10 PSC J041 contractors in FY2024?

1. American Engineering Corporation ($12.9M), 2. UD Contracting Inc. ($9.32M), 3. Johnson Controls Inc ($8.04M), 4. Butt Construction Company, Incorporated ($7.91M), 5. Native Energy & Technology Inc. ($7.27M), 6. Mechanical Resources Incorporated ($7.1M), 7. Aktarius LLC ($7.08M), 8. Energy Systems Group, LLC ($6.27M), 9. Swan Contracting LLC ($6.25M), 10. Trane U.s. Inc. ($5.98M).

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