Top 46 Contractors in PSC Z1BA: Maintenance of Air Traffic Control Towers, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	CMP Commercial Construction Inc. Top agencies DOT (Department of Transportation)	$3,039,422	26.7%	Rank history: #1 in FY2022, #16 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
2	E Corp Top agencies DOT (Department of Transportation)	$2,411,559	21.2%	Rank history: #15 in FY2022, #5 in FY2023, #2 in FY2024 and #3 in FY2025; up 45 since FY2020.
3	Tj&B Air Conditioning and Electric, LLC Top agencies DOT (Department of Transportation)	$1,082,627	9.5%	Rank history: #3 in FY2022, #52 in FY2023, #25 in FY2024 and #6 in FY2025; up 3 since FY2020.
4	King & George, LLC Top agencies DOT (Department of Transportation)	$804,119	7.1%	Rank history: #29 in FY2022 and not on the FY2023–FY2025 lists; up 39 since FY2020.
5	JIM Jam, Inc. Top agencies DOT (Department of Transportation)	$798,364	7.0%	Rank history: #8 in FY2022, #41 in FY2023, #38 in FY2024 and #12 in FY2025; new, not ranked in FY2020.
6	Sergents Mechanical Systems Inc. Top agencies DOT (Department of Transportation)	$364,795	3.2%	Rank history: not on the FY2022 list, #18 in FY2023, #3 in FY2024 and #34 in FY2025; down 5 since FY2020.
7	IHK Joint Venture Top agencies USAF (Department of the Air Force)	$284,428	2.5%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
8	Cowboy Electrical Services Inc. Top agencies DOT (Department of Transportation)	$209,640	1.8%	Rank history: #4 in FY2022, #65 in FY2023, #29 in FY2024 and not on the FY2025 list; up 23 since FY2020.
9	Long Building Technologies, Inc. Top agencies DOT (Department of Transportation)	$195,000	1.7%	Rank history: #28 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
10	Caddo Construction LLC Top agencies DOT (Department of Transportation)	$172,787	1.5%	Rank history: #26 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
11	Mejia International Group Corp Top agencies DOT (Department of Transportation)	$164,001	1.4%	Rank history: #51 in FY2022, #71 in FY2023 and not on the FY2024–FY2025 lists; up 23 since FY2020.
12	Guardian Construction, Inc. Top agencies DOT (Department of Transportation)	$162,842	1.4%	Rank history: not on the FY2022 list, #4 in FY2023, #8 in FY2024 and #4 in FY2025; unchanged since FY2020.
13	Eacm Corp Top agencies DOT (Department of Transportation)	$135,730	1.2%	Rank history: #17 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
14	TK Elevator Corporation 4 awardees Top agencies DOT (Department of Transportation)	$135,054	1.2%	Rank history: #19 in FY2022, #17 in FY2023, #14 in FY2024 and #13 in FY2025; new, not ranked in FY2020.
15	Loeffel Engstrand Corp Top agencies DOT (Department of Transportation)	$107,338	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
16	KEO & Associates Inc. Top agencies DOT (Department of Transportation)	$99,317	0.9%	Rank history: not on the FY2022 list, #32 in FY2023, #51 in FY2024 and not on the FY2025 list; up 21 since FY2020.
17	Arivaca Enterprises, LLC Top agencies DOT (Department of Transportation)	$96,114	0.8%	Rank history: #64 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
18	Armstrong Elevator Company Top agencies DOT (Department of Transportation)	$94,487	0.8%	Rank history: #5 in FY2022, #9 in FY2023, #5 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
19	Bartkowski Life Safety Corp Top agencies DOT (Department of Transportation)	$90,121	0.8%	Rank history: #33 in FY2022, #39 in FY2023, #31 in FY2024 and #47 in FY2025; down 4 since FY2020.
20	ML Builders, LLC Top agencies DOT (Department of Transportation)	$76,623	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
21	Amalgamated Services, Inc. Top agencies DOT (Department of Transportation)	$75,643	0.7%	Rank history: #52 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
22	Accord Federal Services, LLC Top agencies DOT (Department of Transportation)	$62,283	0.5%	Rank history: #16 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
23	Lonergan Electric Service Inc. Top agencies DOT (Department of Transportation)	$56,424	0.5%	Rank history: not on the FY2022–FY2023 lists, #37 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
24	Sh Mechanical Inc. Top agencies DOT (Department of Transportation)	$56,415	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
25	Security Operations Group International LLC Top agencies DOT (Department of Transportation)	$49,758	0.4%	Rank history: #62 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
26	Future Controls, Inc. Top agencies DOT (Department of Transportation)	$48,200	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
27	Lcg, Inc. Top agencies DOT (Department of Transportation)	$38,510	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	The Matthews Group Inc. Top agencies DOT (Department of Transportation)	$37,938	0.3%	Rank history: #40 in FY2022, #2 in FY2023, #21 in FY2024 and #1 in FY2025; up 16 since FY2020.
29	Vorteil Mechanical LLC Top agencies DOT (Department of Transportation)	$34,844	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
30	Projex Corp Top agencies DOT (Department of Transportation)	$34,102	0.3%	Rank history: #48 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
31	Siemens Aktiengesellschaft Through Siemens Industry Inc. Top agencies DOT (Department of Transportation)	$32,934	0.3%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; up 11 since FY2020.
32	Stoner Quality Water, Inc. Top agencies DOT (Department of Transportation)	$28,050	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
33	Firelake Construction Inc. Top agencies DOT (Department of Transportation)	$24,774	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
34	Abell Elevator International, Inc. Top agencies DOT (Department of Transportation)	$24,680	0.2%	Rank history: #59 in FY2022 and not on the FY2023–FY2025 lists; down 21 since FY2020.
35	Thyssenkrupp Elevator Corporation 3 awardees, including TK Elevator Corp Top agencies DOT (Department of Transportation)	$23,136	0.2%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
36	Vazquez Commercial Contracting LLC Top agencies DOT (Department of Transportation)	$21,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Medvolt, LLC Top agencies DOT (Department of Transportation)	$19,942	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
38	Chickasaw Strategic Pointe, LLC Top agencies DOT (Department of Transportation)	$18,652	0.2%	Rank history: not on the FY2022–FY2025 lists; down 28 since FY2020.
39	Schindler Holding AG Through Slade Industries, Inc. Top agencies DOT (Department of Transportation)	$17,760	0.2%	Rank history: #50 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
40	JE Systems Inc. Top agencies DOT (Department of Transportation)	$14,172	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
41	Anderson & Sons Contracting LLC Top agencies DOT (Department of Transportation)	$12,631	0.1%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
42	Southern Elevator Group Inc Through Southern Elevator Company, Inc. Top agencies DOT (Department of Transportation)	$12,394	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Siemens Industry Inc. Top agencies DOT (Department of Transportation)	$5,178	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	MX Holdings US, Inc. Through Firetrol Protection Systems, Inc. Top agencies DOT (Department of Transportation)	$4,961	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
45	Str-Speechtech Limited Top agencies DHS (Department of Homeland Security)	$4,105	<0.1%	Rank history: #56 in FY2022, not on the FY2023 list, #52 in FY2024 and not on the FY2025 list; up 4 since FY2020.
46	Infinite Energy Construction, Inc. Top agencies DOT (Department of Transportation)	$422	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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 $11.4 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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.

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