Top 47 Contractors in PSC Z1BA: Maintenance of Air Traffic Control Towers, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	E Corp Top agencies DOT (Department of Transportation)	$13,248,272	22.9%	Rank history: #2 in FY2021, #15 in FY2022, #5 in FY2023, #2 in FY2024 and #3 in FY2025; up 1 since Aug 2024–Jul 2025.
2	West Point Contractors, Inc. Top agencies DOT (Department of Transportation)	$10,162,032	17.6%	Rank history: not on the FY2021–FY2024 lists and #2 in FY2025; new, not ranked in Aug 2024–Jul 2025.
3	Enfield Enterprises LLC Top agencies DOT (Department of Transportation)	$5,210,994	9.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
4	Mckenzie Construction & Site Development LLC Top agencies DOT (Department of Transportation)	$4,362,415	7.6%	Rank history: not on the FY2021–FY2024 lists and #5 in FY2025; new, not ranked in Aug 2024–Jul 2025.
5	Walsh Federal LLC Top agencies DOT (Department of Transportation)	$3,722,675	6.4%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #10 in FY2025; up 1 since Aug 2024–Jul 2025.
6	CMP Commercial Construction Inc Top agencies DOT (Department of Transportation)	$3,411,036	5.9%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #32 in FY2025; up 33 since Aug 2024–Jul 2025.
7	Guardian Construction, Inc. Top agencies DOT (Department of Transportation)	$3,363,382	5.8%	Rank history: #12 in FY2021, not on the FY2022 list, #4 in FY2023, #8 in FY2024 and #4 in FY2025; down 4 since Aug 2024–Jul 2025.
8	Tj&B Air Conditioning and Electric, LLC Top agencies DOT (Department of Transportation)	$2,465,020	4.3%	Rank history: #3 in FY2021, #3 in FY2022, #52 in FY2023, #25 in FY2024 and #6 in FY2025; up 5 since Aug 2024–Jul 2025.
9	Trinity of Utah Incorporated Top agencies DOT (Department of Transportation)	$1,508,249	2.6%	Rank history: not on the FY2021–FY2024 lists and #9 in FY2025; new, not ranked in Aug 2024–Jul 2025.
10	Burton Construction, Inc. Top agencies DOT (Department of Transportation)	$1,318,697	2.3%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2023, not on the FY2024 list and #27 in FY2025; up 13 since Aug 2024–Jul 2025.
11	Armstrong Elevator Company Top agencies DOT (Department of Transportation)	$1,002,262	1.7%	Rank history: #18 in FY2021, #5 in FY2022, #9 in FY2023, #5 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
12	TK Elevator Corporation 2 awardees Top agencies DOT (Department of Transportation)	$776,532	1.3%	Rank history: #14 in FY2021, #19 in FY2022, #17 in FY2023, #14 in FY2024 and #11 in FY2025; down 2 since Aug 2024–Jul 2025.
13	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 Aug 2024–Jul 2025.
14	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 Aug 2024–Jul 2025.
15	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 Aug 2024–Jul 2025.
16	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 Aug 2024–Jul 2025.
17	The Matthews Group Inc. Top agencies DOT (Department of Transportation)	$226,630	0.4%	Rank history: #28 in FY2021, #40 in FY2022, #2 in FY2023, #21 in FY2024 and #1 in FY2025; down 16 since Aug 2024–Jul 2025.
18	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 Aug 2024–Jul 2025.
19	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 Aug 2024–Jul 2025.
20	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 Aug 2024–Jul 2025.
21	M2 Federal Inc. Top agencies DOT (Department of Transportation)	$95,977	0.2%	Rank history: not on the FY2021 list, #10 in FY2022, #27 in FY2023, #6 in FY2024 and #23 in FY2025; down 1 since Aug 2024–Jul 2025.
22	Cornerstone Construction Services, LLC Top agencies DOT (Department of Transportation)	$93,974	0.2%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023, #4 in FY2024 and #8 in FY2025; down 18 since Aug 2024–Jul 2025.
23	M.e. Tafoya Enterprises, Inc. Top agencies DOT (Department of Transportation)	$89,000	0.2%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2023, #26 in FY2024 and #49 in FY2025; up 17 since Aug 2024–Jul 2025.
24	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; new, not ranked in Aug 2024–Jul 2025.
25	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 Aug 2024–Jul 2025.
26	Trane U.s. Inc. Top agencies DOT (Department of Transportation)	$59,415	0.1%	Rank history: not on the FY2021 list, #55 in FY2022, not on the FY2023–FY2024 lists and #35 in FY2025; new, not ranked in Aug 2024–Jul 2025.
27	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 #45 in FY2025; up 1 since Aug 2024–Jul 2025.
28	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 Aug 2024–Jul 2025.
29	Apex Construction Company, Inc. Top agencies DOT (Department of Transportation)	$52,091	0.1%	Rank history: not on the FY2021–FY2024 lists and #30 in FY2025; new, not ranked in Aug 2024–Jul 2025.
30	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 13 since Aug 2024–Jul 2025.
31	Structsure Projects Inc. Top agencies DOT (Department of Transportation)	$42,720	0.1%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2023, not on the FY2024 list and #12 in FY2025; down 22 since Aug 2024–Jul 2025.
32	Evans Consoles Incorporated Top agencies DOT (Department of Transportation)	$40,898	0.1%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; new, not ranked in Aug 2024–Jul 2025.
33	Junction Incorporated Top agencies DOT (Department of Transportation)	$37,320	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
34	3 Phase Elevator Corp Through Specialized Elevator Corp Top agencies DOT (Department of Transportation)	$33,284	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
35	Phoenix General Contractors, LLC Top agencies DOT (Department of Transportation)	$32,680	0.1%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; new, not ranked in Aug 2024–Jul 2025.
36	Tennessee Brothers Energy Incorporated Top agencies DOT (Department of Transportation)	$29,369	0.1%	Rank history: not on the FY2021–FY2024 lists and #37 in FY2025; new, not ranked in Aug 2024–Jul 2025.
37	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 Aug 2024–Jul 2025.
38	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 Aug 2024–Jul 2025.
39	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 Aug 2024–Jul 2025.
40	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 #50 in FY2025; up 1 since Aug 2024–Jul 2025.
41	JIM Jam, Inc. Top agencies DOT (Department of Transportation)	$20,062	<0.1%	Rank history: #5 in FY2021, #8 in FY2022, #41 in FY2023, #38 in FY2024 and #13 in FY2025; down 33 since Aug 2024–Jul 2025.
42	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 35 since Aug 2024–Jul 2025.
43	Addon Services LLC Top agencies DOT (Department of Transportation)	$18,519	<0.1%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #29 in FY2025; down 14 since Aug 2024–Jul 2025.
44	Schindler Elevator Corporation 2 awardees, including Slade Industries, Inc. Top agencies DOT (Department of Transportation)	$17,250	<0.1%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023, #40 in FY2024 and #36 in FY2025; down 18 since Aug 2024–Jul 2025.
45	United Rentals, Inc. Through United Rentals (North America), Inc. Top agencies DOT (Department of Transportation)	$12,596	<0.1%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; down 10 since Aug 2024–Jul 2025.
46	A / C Services & Mechanical LLC Top agencies DOT (Department of Transportation)	$11,572	<0.1%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; down 41 since Aug 2024–Jul 2025.
47	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 33 since Aug 2024–Jul 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 $57.8 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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 Aug 2024–Jul 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