Top 53 Contractors in PSC Z1BA: Maintenance of Air Traffic Control Towers, Jul 2025–Jun 2026

Name: Top 53 Contractors in PSC Z1BA: Maintenance of Air Traffic Control Towers, Jul 2025–Jun 2026
Creator: GovTribe

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 81% of PSC Z1BA contract dollars from July 2025 through June 2026

Contract obligations: $57,323,665 Net of deobligations, by contracts coded PSC Z1BA
Contractors: 55 Parent companies with an obligation
Largest contractor: E Corp $13.3 million, 21.9% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 53 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	E Corp Top agencies DOT (Department of Transportation)	$13,313,045	21.9%	Rank history: #2 in FY2021, #15 in FY2022, #5 in FY2023, #2 in FY2024 and #3 in FY2025; up 1 since Jul 2024–Jun 2025.
2	West Point Contractors, Inc. Top agencies DOT (Department of Transportation)	$10,162,032	16.7%	Rank history: not on the FY2021–FY2024 lists and #2 in FY2025; new, not ranked in Jul 2024–Jun 2025.
3	Enfield Enterprises LLC Top agencies DOT (Department of Transportation)	$5,210,994	8.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
4	Mckenzie Construction & Site Development LLC Top agencies DOT (Department of Transportation)	$4,362,415	7.2%	Rank history: not on the FY2021–FY2024 lists and #5 in FY2025; new, not ranked in Jul 2024–Jun 2025.
5	Walsh Federal LLC Top agencies DOT (Department of Transportation)	$4,142,582	6.8%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #10 in FY2025; up 2 since Jul 2024–Jun 2025.
6	CMP Commercial Construction Inc Top agencies DOT (Department of Transportation)	$3,397,511	5.6%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #33 in FY2025; up 14 since Jul 2024–Jun 2025.
7	Guardian Construction, Inc. Top agencies DOT (Department of Transportation)	$3,342,638	5.5%	Rank history: #12 in FY2021, not on the FY2022 list, #4 in FY2023, #8 in FY2024 and #4 in FY2025; down 4 since Jul 2024–Jun 2025.
8	Tj&B Air Conditioning and Electric, LLC Top agencies DOT (Department of Transportation)	$2,506,552	4.1%	Rank history: #3 in FY2021, #3 in FY2022, #52 in FY2023, #25 in FY2024 and #6 in FY2025; up 5 since Jul 2024–Jun 2025.
9	Trinity of Utah Incorporated Top agencies DOT (Department of Transportation)	$1,508,249	2.5%	Rank history: not on the FY2021–FY2024 lists and #9 in FY2025; new, not ranked in Jul 2024–Jun 2025.
10	Burton Construction, Inc. Top agencies DOT (Department of Transportation)	$1,318,697	2.2%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2023, not on the FY2024 list and #27 in FY2025; up 15 since Jul 2024–Jun 2025.
11	Armstrong Elevator Company Top agencies DOT (Department of Transportation)	$1,002,262	1.6%	Rank history: #18 in FY2021, #5 in FY2022, #9 in FY2023, #5 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
12	Cornerstone Construction Services, LLC Top agencies DOT (Department of Transportation)	$983,155	1.6%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023, #4 in FY2024 and #8 in FY2025; down 8 since Jul 2024–Jun 2025.
13	A / C Services & Mechanical LLC Top agencies DOT (Department of Transportation)	$942,386	1.6%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; new, not ranked in Jul 2024–Jun 2025.
14	TK Elevator Corporation 2 awardees Top agencies DOT (Department of Transportation)	$740,997	1.2%	Rank history: #14 in FY2021, #19 in FY2022, #17 in FY2023, #14 in FY2024 and #13 in FY2025; down 5 since Jul 2024–Jun 2025.
15	JIM Jam, Inc. Top agencies DOT (Department of Transportation)	$647,029	1.1%	Rank history: #5 in FY2021, #8 in FY2022, #41 in FY2023, #38 in FY2024 and #12 in FY2025; new, not ranked in Jul 2024–Jun 2025.
16	Eklutna Construction & Maintenance, LLC Top agencies DOT (Department of Transportation)	$487,974	0.8%	Rank history: not on the FY2021–FY2024 lists and #15 in FY2025; new, not ranked in Jul 2024–Jun 2025.
17	J & J 2000 Inc. Top agencies DOT (Department of Transportation)	$409,832	0.7%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; new, not ranked in Jul 2024–Jun 2025.
18	Ahtna Builders, LLC Top agencies DOT (Department of Transportation)	$397,283	0.7%	Rank history: not on the FY2021–FY2024 lists and #16 in FY2025; new, not ranked in Jul 2024–Jun 2025.
19	The Matthews Group Inc. Top agencies DOT (Department of Transportation)	$265,344	0.4%	Rank history: #28 in FY2021, #40 in FY2022, #2 in FY2023, #21 in FY2024 and #1 in FY2025; down 18 since Jul 2024–Jun 2025.
20	Advantix Engineering Corp Top agencies DOT (Department of Transportation)	$240,952	0.4%	Rank history: not on the FY2021–FY2022 lists, #8 in FY2023, not on the FY2024 list and #20 in FY2025; new, not ranked in Jul 2024–Jun 2025.
21	Lonergan Electric Service Inc. Top agencies DOT (Department of Transportation)	$194,631	0.3%	Rank history: #23 in FY2021, not on the FY2022–FY2023 lists, #37 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
22	Indus Insight, JV Top agencies DOT (Department of Transportation)	$133,448	0.2%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; down 3 since Jul 2024–Jun 2025.
23	M2 Federal Inc. Top agencies DOT (Department of Transportation)	$128,090	0.2%	Rank history: not on the FY2021 list, #10 in FY2022, #27 in FY2023, #6 in FY2024 and #23 in FY2025; up 1 since Jul 2024–Jun 2025.
24	Total Mechanical Services Inc. Top agencies DOT (Department of Transportation)	$125,397	0.2%	Rank history: not on the FY2021–FY2024 lists and #22 in FY2025; new, not ranked in Jul 2024–Jun 2025.
25	Dawson Mcg, Inc. Top agencies Navy (Department of the Navy)	$100,063	0.2%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; new, not ranked in Jul 2024–Jun 2025.
26	Yorkshire Industries LLC Top agencies DOT (Department of Transportation)	$97,804	0.2%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27	M.e. Tafoya Enterprises, Inc. Top agencies DOT (Department of Transportation)	$89,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2023, #26 in FY2024 and #50 in FY2025; up 9 since Jul 2024–Jun 2025.
28	Structsure Projects Inc. Top agencies DOT (Department of Transportation)	$78,795	0.1%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2023, not on the FY2024 list and #11 in FY2025; down 18 since Jul 2024–Jun 2025.
29	KEO & Associates Inc. Top agencies DOT (Department of Transportation)	$75,000	0.1%	Rank history: #16 in FY2021, not on the FY2022 list, #32 in FY2023, #51 in FY2024 and not on the FY2025 list; up 8 since Jul 2024–Jun 2025.
30	Vision Contracting Inc. Top agencies DOT (Department of Transportation)	$65,344	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
31	Core Consolidated LLC Top agencies DOT (Department of Transportation)	$58,468	0.1%	Rank history: not on the FY2021–FY2022 lists, #12 in FY2023, #49 in FY2024 and #46 in FY2025; down 2 since Jul 2024–Jun 2025.
32	Veritas Construction Inc. Top agencies DOT (Department of Transportation)	$52,690	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
33	Apex Construction Company, Inc. Top agencies DOT (Department of Transportation)	$52,091	0.1%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; new, not ranked in Jul 2024–Jun 2025.
34	Weil Construction Inc Top agencies DOT (Department of Transportation)	$43,658	0.1%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2023, #10 in FY2024 and #26 in FY2025; down 28 since Jul 2024–Jun 2025.
35	Evans Consoles Incorporated Top agencies DOT (Department of Transportation)	$40,898	0.1%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; new, not ranked in Jul 2024–Jun 2025.
36	Phoenix General Contractors, LLC Top agencies DOT (Department of Transportation)	$32,680	0.1%	Rank history: not on the FY2021–FY2024 lists and #35 in FY2025; new, not ranked in Jul 2024–Jun 2025.
37	Trane U.s. Inc. Top agencies DOT (Department of Transportation)	$31,590	0.1%	Rank history: not on the FY2021 list, #55 in FY2022, not on the FY2023–FY2024 lists and #36 in FY2025; new, not ranked in Jul 2024–Jun 2025.
38	Specialty Consulting, Inc. Top agencies DOT (Department of Transportation)	$30,645	0.1%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; down 8 since Jul 2024–Jun 2025.
39	Tennessee Brothers Energy Incorporated Top agencies DOT (Department of Transportation)	$29,369	<0.1%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; new, not ranked in Jul 2024–Jun 2025.
40	3PHASE Excel Elevator LLC Through Specialized Elevator Corp Top agencies DOT (Department of Transportation)	$26,400	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
41	Contracting One LLC Top agencies DOT (Department of Transportation)	$24,839	<0.1%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; new, not ranked in Jul 2024–Jun 2025.
42	Pacific Rim Environmental, Inc. Top agencies DOT (Department of Transportation)	$23,802	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
43	Veterans Elite Inc Top agencies USAF (Department of the Air Force)	$23,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; new, not ranked in Jul 2024–Jun 2025.
44	Deep Reflection, Inc. Top agencies DOT (Department of Transportation)	$22,800	<0.1%	Rank history: not on the FY2021 list, #20 in FY2022, not on the FY2023–FY2024 lists and #51 in FY2025; down 4 since Jul 2024–Jun 2025.
45	Addon Services LLC Top agencies DOT (Department of Transportation)	$22,574	<0.1%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #29 in FY2025; down 40 since Jul 2024–Jun 2025.
46	United Rentals, Inc. Top agencies DOT (Department of Transportation)	$21,085	<0.1%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; new, not ranked in Jul 2024–Jun 2025.
47	Environmental Testing and Consulting, Inc. Top agencies DOT (Department of Transportation)	$20,620	<0.1%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; new, not ranked in Jul 2024–Jun 2025.
48	Grot, Inc. Top agencies DOT (Department of Transportation)	$19,486	<0.1%	Rank history: not on the FY2021 list, #24 in FY2022, #29 in FY2023, #13 in FY2024 and #44 in FY2025; down 40 since Jul 2024–Jun 2025.
49	Schindler Elevator Corporation 2 awardees, including Slade Industries, Inc. Top agencies DOT (Department of Transportation)	$15,704	<0.1%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023, #40 in FY2024 and #37 in FY2025; down 22 since Jul 2024–Jun 2025.
50	United Rentals (North America), Inc. Top agencies DOT (Department of Transportation)	$12,596	<0.1%	Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; new, not ranked in Jul 2024–Jun 2025.
51	Frontline King George JV LLC Top agencies DOT (Department of Transportation)	$11,558	<0.1%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2023, #42 in FY2024 and #18 in FY2025; down 36 since Jul 2024–Jun 2025.
52	Sunbelt Rentals Inc. Top agencies DOT (Department of Transportation)	$9,058	<0.1%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; new, not ranked in Jul 2024–Jun 2025.
53	Prow'ess Construction Corp. Top agencies DOT (Department of Transportation)	$2,092	<0.1%	Rank history: not on the FY2021 list, #25 in FY2022, #6 in FY2023, #16 in FY2024 and #54 in FY2025; down 42 since Jul 2024–Jun 2025.

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53 of 55 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 $60.8 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

Who were the top 10 PSC Z1BA contractors in Jul 2025–Jun 2026?

1. E Corp ($13.3M), 2. West Point Contractors, Inc. ($10.2M), 3. Enfield Enterprises LLC ($5.21M), 4. Mckenzie Construction & Site Development LLC ($4.36M), 5. Walsh Federal LLC ($4.14M), 6. CMP Commercial Construction Inc ($3.4M), 7. Guardian Construction, Inc. ($3.34M), 8. Tj&B Air Conditioning and Electric, LLC ($2.51M), 9. Trinity of Utah Incorporated ($1.51M), 10. Burton Construction, Inc. ($1.32M).

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