Top 100 Contractors in PSC Z1NZ: Maintenance of Other Utilities, FY2025

Name: Top 100 Contractors in PSC Z1NZ: Maintenance of Other Utilities, FY2025
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 52% of FY2025 PSC Z1NZ contract dollars

Contract obligations: $38,056,643 Net of deobligations, by contracts coded PSC Z1NZ
Contractors: 111 Parent companies with an obligation
Largest contractor: Advanced Management Group L.L.C. $4.11 million, 9.9% 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	Advanced Management Group L.L.C. Top agencies USAF (Department of the Air Force)	$4,112,983	9.9%	Rank history: not on the FY2021–FY2024 lists; new.
2	Johnson Controls Inc Through Johnson Controls Fire Protection LP Top agencies Navy (Department of the Navy)	$3,064,480	7.4%	Rank history: not on the FY2021–FY2024 lists; new.
3	Edco Disposal Corp Top agencies Navy (Department of the Navy)	$2,480,788	6.0%	Rank history: not on the FY2021–FY2024 lists; new.
4	Amentum Holdings, Inc. Through Amentum Technology, Inc. Top agencies Navy (Department of the Navy)	$2,318,406	5.6%	Rank history: not on the FY2021–FY2024 lists; new.
5	Elcon Enterprises Inc. Top agencies National Gallery of Art	$1,883,110	4.5%	Rank history: not on the FY2021–FY2022 lists, #18 in FY2023 and #6 in FY2024; up 1 since FY2024.
6	Sernotti Electrical Services LLC Top agencies Navy (Department of the Navy)	$1,702,085	4.1%	Rank history: not on the FY2021 list, #19 in FY2022, #9 in FY2023 and #3 in FY2024; down 3 since FY2024.
7	Toshiba Infrastructure Systems & Solutions Corporation Top agencies Navy (Department of the Navy)	$1,702,025	4.1%	Rank history: not on the FY2021–FY2024 lists; new.
8	Skoda Contracting Co Top agencies Army (Department of the Army)	$1,688,817	4.1%	Rank history: not on the FY2021–FY2024 lists; new.
9	Synergy Electric Company, Inc. Top agencies Navy (Department of the Navy)	$1,577,714	3.8%	Rank history: not on the FY2021 list, #4 in FY2022, #26 in FY2023 and not on the FY2024 list; returned.
10	Sociedad Espanola De Montajes Industriales SA Top agencies Navy (Department of the Navy)	$1,079,336	2.6%	Rank history: not on the FY2021–FY2024 lists; new.
11	Geumjang Construction Co.,Ltd Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$1,058,590	2.6%	Rank history: not on the FY2021–FY2024 lists; new.
12	Souza Construction, Inc. Top agencies Navy (Department of the Navy)	$914,562	2.2%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2023 and not on the FY2024 list; returned.
13	Panacea Construction Group LLC Top agencies USAF (Department of the Air Force)	$896,028	2.2%	Rank history: not on the FY2021–FY2024 lists; new.
14	Mikocorp LLC Top agencies Army (Department of the Army)	$840,811	2.0%	Rank history: not on the FY2021–FY2024 lists; new.
15	Coho Technology Solutions, LLC Top agencies Navy (Department of the Navy)	$766,314	1.8%	Rank history: not on the FY2021–FY2024 lists; new.
16	KBR Wyle Services LLC Through KBR Services, LLC Top agencies Navy (Department of the Navy)	$738,543	1.8%	Rank history: not on the FY2021–FY2024 lists; new.
17	Trinity North Star JV Top agencies DHS (Department of Homeland Security)	$720,217	1.7%	Rank history: not on the FY2021–FY2024 lists; new.
18	Pittman Consulting Group, LLC Top agencies Army (Department of the Army)	$695,574	1.7%	Rank history: #36 in FY2021, #45 in FY2022, #42 in FY2023 and #42 in FY2024; up 24 since FY2024.
19	Municipal Base Services LLC Top agencies DHA (Defense Health Agency) Navy (Department of the Navy)	$626,733	1.5%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2023 and #10 in FY2024; down 9 since FY2024.
20	Elrim Construction Co., Ltd. Top agencies Army (Department of the Army)	$589,396	1.4%	Rank history: not on the FY2021–FY2024 lists; new.
21	American Electric Power Company, Inc. Through Public Service Company of Oklahoma Top agencies Army (Department of the Army)	$535,310	1.3%	Rank history: #1 in FY2021 and not on the FY2022–FY2024 lists; returned.
22	Kgjj Engineering Solutions, LLC Top agencies Navy (Department of the Navy)	$515,206	1.2%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2024; down 6 since FY2024.
23	Tsontos, Michael M., S.A. Top agencies Navy (Department of the Navy)	$474,475	1.1%	Rank history: #93 in FY2021, #58 in FY2022, #46 in FY2023 and not on the FY2024 list; returned.
24	Port Madison Construction Corporation Top agencies Navy (Department of the Navy)	$469,600	1.1%	Rank history: not on the FY2021–FY2024 lists; new.
25	Seong Bo Const.ind.co.,Ltd. Top agencies Army (Department of the Army)	$432,047	1.0%	Rank history: not on the FY2021–FY2024 lists; new.
26	Otis Elevator Company Top agencies USAF (Department of the Air Force)	$403,537	1.0%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2023 and #24 in FY2024; down 2 since FY2024.
27	Okinawa Sobi Kogyo, K.K. Top agencies Navy (Department of the Navy)	$352,147	0.9%	Rank history: #77 in FY2021 and not on the FY2022–FY2024 lists; returned.
28	Cayuse Federal Services LLC Top agencies Navy (Department of the Navy)	$349,529	0.8%	Rank history: not on the FY2021–FY2024 lists; new.
29	Witco Industries Ltd. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$268,239	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
30	Valdez WA Patriot Joint Venture Top agencies Navy (Department of the Navy)	$259,133	0.6%	Rank history: #10 in FY2021, #10 in FY2022, not on the FY2023 list and #8 in FY2024; down 22 since FY2024.
31	Eiffage Infraestructuras Sau Top agencies USAF (Department of the Air Force)	$221,534	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
32	Cornerstone Construction Services, LLC Top agencies VA (Department of Veterans Affairs)	$205,804	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
33	Northeast Generator, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$200,660	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
34	Refcon Services Inc Top agencies Navy (Department of the Navy)	$197,914	0.5%	Rank history: not on the FY2021–FY2022 lists, #45 in FY2023 and #31 in FY2024; down 3 since FY2024.
35	Genserve LLC Top agencies Army (Department of the Army)	$193,132	0.5%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2024; down 15 since FY2024.
36	Islands Mechanical Contractor, Inc. Top agencies Navy (Department of the Navy)	$184,183	0.4%	Rank history: not on the FY2021 list, #32 in FY2022, not on the FY2023 list and #77 in FY2024; up 41 since FY2024.
37	TOA Oil Kogyosho Co., Ltd Top agencies Army (Department of the Army)	$164,364	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
38	Koman Government Solutions LLC Top agencies Navy (Department of the Navy)	$159,010	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
39	Supply Solutions Intl Corp Top agencies VA (Department of Veterans Affairs)	$145,286	0.4%	Rank history: not on the FY2021–FY2023 lists and #91 in FY2024; up 52 since FY2024.
40	Cummins Inc. 2 awardees Top agencies VA (Department of Veterans Affairs) National Gallery of Art	$131,882	0.3%	Rank history: not on the FY2021 list, #61 in FY2022, #58 in FY2023 and #40 in FY2024; unchanged since FY2024.
41	Brown Electrical Services, LLC Top agencies OPM (Office of Personnel Management)	$125,000	0.3%	Rank history: not on the FY2021–FY2023 lists and #38 in FY2024; down 3 since FY2024.
42	Dmyles Inc. Top agencies Army (Department of the Army)	$123,750	0.3%	Rank history: not on the FY2021–FY2022 lists, #50 in FY2023 and #36 in FY2024; down 6 since FY2024.
43	Veteran Elevated Solutions, LLC Top agencies VA (Department of Veterans Affairs)	$110,520	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
44	Tekton CC, LLC Top agencies VA (Department of Veterans Affairs)	$99,773	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
45	Greenwood Contracting, Inc. Top agencies USAF (Department of the Air Force)	$95,000	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
46	Siemens Industry Inc. Top agencies DOJ (Department of Justice)	$86,340	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
47	Tecc Corporation Top agencies Navy (Department of the Navy)	$82,591	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
48	Hampton Roads Mechanical of Virginia, LLC Top agencies Navy (Department of the Navy)	$80,263	0.2%	Rank history: #17 in FY2021, #20 in FY2022, #27 in FY2023 and not on the FY2024 list; returned.
49	GKG Contractors LLC Top agencies Navy (Department of the Navy)	$78,430	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
50	Johnson Controls Building Automation Systems, LLC Top agencies DOS (Department of State)	$78,123	0.2%	Rank history: not on the FY2021–FY2023 lists and #41 in FY2024; down 9 since FY2024.
51	Power Mechanical Inc. Top agencies DHS (Department of Homeland Security)	$71,350	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
52	Raiden Co., Ltd. Top agencies Army (Department of the Army)	$66,560	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
53	Youngjin Construction Inc. Top agencies Army (Department of the Army)	$60,721	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
54	AOS Services Inc. Top agencies Navy (Department of the Navy)	$59,957	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
55	Jordan Elevator Overseas Ltd. Co. Top agencies DOS (Department of State)	$59,322	0.1%	Rank history: not on the FY2021–FY2023 lists and #57 in FY2024; up 2 since FY2024.
56	Pacific Place Services LLC Top agencies DOS (Department of State)	$56,700	0.1%	Rank history: not on the FY2021 list, #83 in FY2022, #70 in FY2023 and #37 in FY2024; down 19 since FY2024.
57	SMT Construction PVT Ltd Top agencies DOS (Department of State)	$56,023	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
58	Omniverter Inc. Top agencies DOS (Department of State)	$55,200	0.1%	Rank history: #84 in FY2021, not on the FY2022 list, #98 in FY2023 and #82 in FY2024; up 24 since FY2024.
59	Mechanical Resources Incorporated Top agencies Navy (Department of the Navy)	$49,645	0.1%	Rank history: #71 in FY2021 and not on the FY2022–FY2024 lists; returned.
60	Utility Systems Technologies, Inc. Top agencies DOS (Department of State)	$47,430	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
61	Enviremedial Services, Inc. Top agencies Army (Department of the Army)	$46,287	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
62	Allcom Global Services Inc. Through Strantech LLC Top agencies OPM (Office of Personnel Management)	$45,449	0.1%	Rank history: not on the FY2021–FY2023 lists and #60 in FY2024; down 2 since FY2024.
63	Alabama Controls, Inc. Top agencies DOS (Department of State)	$45,056	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
64	NCH Corporation Through Chem-Aqua Inc. Top agencies VA (Department of Veterans Affairs)	$45,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
65	Etolin Strait Development Group LLC Top agencies Navy (Department of the Navy)	$44,855	0.1%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2024; down 39 since FY2024.
66	Wadsworth Builders Co Inc. Top agencies USAF (Department of the Air Force)	$37,811	0.1%	Rank history: not on the FY2021–FY2023 lists and #5 in FY2024; down 61 since FY2024.
67	Kesz Ipari Technologiak Kft. Top agencies DOS (Department of State)	$35,177	0.1%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2023 and #66 in FY2024; down 1 since FY2024.
68	Rq-Aecom JV Top agencies DLA (Defense Logistics Agency)	$34,916	0.1%	Rank history: not on the FY2021 list, #42 in FY2022 and not on the FY2023–FY2024 lists; returned.
69	Miad Holdings LLC Top agencies DHS (Department of Homeland Security)	$34,633	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
70	Edilem S.R.L. Top agencies Navy (Department of the Navy)	$34,557	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
71	Infranergy LLC Top agencies DOS (Department of State)	$31,350	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
72	Trane Indonesia, PT Top agencies DOS (Department of State)	$30,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
73	Jeol Usa, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$29,231	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
74	Premier Power Maintenance LLC Top agencies VA (Department of Veterans Affairs)	$27,770	0.1%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2024; down 26 since FY2024.
75	HQE Systems Inc. Top agencies USAF (Department of the Air Force)	$27,405	0.1%	Rank history: not on the FY2021–FY2023 lists and #76 in FY2024; up 1 since FY2024.
76	Power Edge, Inc. Top agencies VA (Department of Veterans Affairs)	$24,575	0.1%	Rank history: not on the FY2021 list, #30 in FY2022, not on the FY2023 list and #35 in FY2024; down 41 since FY2024.
77	Riverview Construction Associates Inc. Top agencies USAF (Department of the Air Force)	$23,760	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
78	North Coast Electric Company Through Capital Lighting & Supply LLC Top agencies Navy (Department of the Navy)	$23,023	0.1%	Rank history: not on the FY2021–FY2023 lists and #72 in FY2024; down 6 since FY2024.
79	Kaestle Enterprises, Inc. Top agencies VA (Department of Veterans Affairs)	$22,500	0.1%	Rank history: not on the FY2021 list, #99 in FY2022, not on the FY2023 list and #67 in FY2024; down 12 since FY2024.
80	Mergent Global Services Limited Liability Company Top agencies DOS (Department of State)	$21,990	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
81	UIS Holdings Inc. Through Utilities Instrumentation Service Incorporated Top agencies DOJ (Department of Justice)	$20,410	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
82	Fargo Pacific Inc. Top agencies USAF (Department of the Air Force)	$20,200	<0.1%	Rank history: #73 in FY2021 and not on the FY2022–FY2024 lists; returned.
83	All American Contracting Solutions, LLC Top agencies USAF (Department of the Air Force)	$18,417	<0.1%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2023 and not on the FY2024 list; returned.
84	Horizon Solution Company Top agencies Army (Department of the Army)	$18,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
85	Kone Inc Top agencies Army (Department of the Army)	$13,296	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
86	Elevert Corporation Company Limited Top agencies DOS (Department of State)	$13,209	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
87	D&D Industrial Solutions LLC Top agencies VA (Department of Veterans Affairs)	$12,800	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
88	Power Four Limited Top agencies DOS (Department of State)	$12,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
89	Wireless Network Group, Inc. Top agencies Army (Department of the Army)	$10,765	<0.1%	Rank history: not on the FY2021–FY2023 lists and #87 in FY2024; down 2 since FY2024.
90	Chugach Solutions Enterprise, LLC Top agencies Navy (Department of the Navy)	$10,695	<0.1%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2024; down 46 since FY2024.
91	Salish Construction Co Top agencies Army (Department of the Army)	$10,260	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
92	Brothers Mechanical Services LLC Top agencies CFTC (Commodity Futures Trading Commission)	$9,945	<0.1%	Rank history: not on the FY2021–FY2023 lists and #74 in FY2024; down 18 since FY2024.
93	Schindler Elevator Corporation Top agencies Army (Department of the Army)	$9,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
94	Coastal Distribution Contractors Inc. Top agencies Navy (Department of the Navy)	$8,888	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
95	Invicta Global, LLC Top agencies Navy (Department of the Navy)	$8,704	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
96	Allied Electric Limited Liability Company Top agencies Army (Department of the Army)	$8,188	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
97	Trane Canada ULC Top agencies DOS (Department of State)	$8,005	<0.1%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2024; down 8 since FY2024.
98	Ferreteria Rota SL Top agencies Navy (Department of the Navy)	$7,752	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
99	Paraclete Maintenance & Design, LLC Top agencies USDA (Department of Agriculture)	$7,550	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
100	VA Department of Transportation Through Virginia State Police Top agencies Commerce (Department of Commerce)	$5,600	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.

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100 of 111 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 $41.4 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

Who were the top 10 PSC Z1NZ contractors in FY2025?

1. Advanced Management Group L.L.C. ($4.11M), 2. Johnson Controls Inc ($3.06M), 3. Edco Disposal Corp ($2.48M), 4. Amentum Holdings, Inc. ($2.32M), 5. Elcon Enterprises Inc. ($1.88M), 6. Sernotti Electrical Services LLC ($1.7M), 7. Toshiba Infrastructure Systems & Solutions Corporation ($1.7M), 8. Skoda Contracting Co ($1.69M), 9. Synergy Electric Company, Inc. ($1.58M), 10. Sociedad Espanola De Montajes Industriales SA ($1.08M).

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