Top 42 Contractors in PSC Z1BC: Maintenance of Radar and Navigational Facilities, Jul 2025–Jun 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	S & K Security Group LLC Top agencies DHS (Department of Homeland Security)	$114,653,121	55.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
2	Lockheed Martin Corporation 2 awardees Top agencies USAF (Department of the Air Force)	$49,167,647	23.8%	Rank history: not on the FY2021–FY2024 lists and #1 in FY2025; unchanged since Jul 2024–Jun 2025.
3	Tyonek Aircraft Overhaul, LLC Top agencies DHS (Department of Homeland Security)	$27,702,839	13.4%	Rank history: not on the FY2021 list, #3 in FY2022, #1 in FY2023, #2 in FY2024 and #3 in FY2025; down 2 since Jul 2024–Jun 2025.
4	Tcom, L.P. Top agencies Navy (Department of the Navy)	$5,659,983	2.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
5	Niihau Ranch LLC Top agencies Navy (Department of the Navy)	$2,111,856	1.0%	Rank history: not on the FY2021–FY2023 lists, #5 in FY2024 and #4 in FY2025; unchanged since Jul 2024–Jun 2025.
6	Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force)	$1,506,782	0.7%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #2 in FY2025; down 3 since Jul 2024–Jun 2025.
7	Lawdensky Construction Company Incorporated Top agencies DOT (Department of Transportation)	$574,130	0.3%	Rank history: not on the FY2021 list, #34 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
8	JR Tri-State General Contracting Group, Inc. Top agencies DOT (Department of Transportation)	$507,080	0.2%	Rank history: not on the FY2021–FY2024 lists and #6 in FY2025; new, not ranked in Jul 2024–Jun 2025.
9	Bristol Bay Native Corporation Through Bristol Construction Services, LLC Top agencies DOT (Department of Transportation)	$457,969	0.2%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; new, not ranked in Jul 2024–Jun 2025.
10	Detect Inc. Top agencies USAF (Department of the Air Force)	$446,023	0.2%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; new, not ranked in Jul 2024–Jun 2025.
11	Lam Industries, LLC Top agencies DOT (Department of Transportation)	$408,000	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
12	IBS L.l.c Top agencies DOT (Department of Transportation)	$362,494	0.2%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; up 16 since Jul 2024–Jun 2025.
13	WAM Industries, Incorporated Top agencies DOT (Department of Transportation)	$342,200	0.2%	Rank history: not on the FY2021 list, #9 in FY2022, not on the FY2023 list, #6 in FY2024 and #28 in FY2025; down 7 since Jul 2024–Jun 2025.
14	Fluharty Erie, LLC Top agencies DOT (Department of Transportation)	$303,249	0.1%	Rank history: #21 in FY2021, #26 in FY2022, #6 in FY2023, #11 in FY2024 and #15 in FY2025; up 2 since Jul 2024–Jun 2025.
15	M.e. Tafoya Enterprises, Inc. Top agencies DOT (Department of Transportation)	$288,758	0.1%	Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; new, not ranked in Jul 2024–Jun 2025.
16	Shannon & Wilson Inc. Top agencies DOT (Department of Transportation)	$278,920	0.1%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; new, not ranked in Jul 2024–Jun 2025.
17	Bartkowski Life Safety Corp Top agencies DOT (Department of Transportation)	$248,934	0.1%	Rank history: not on the FY2021–FY2023 lists, #15 in FY2024 and #23 in FY2025; up 5 since Jul 2024–Jun 2025.
18	Prow'ess Construction Corp. Top agencies DOT (Department of Transportation)	$221,068	0.1%	Rank history: #8 in FY2021, #36 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
19	Shashua RON Top agencies DOT (Department of Transportation)	$192,312	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
20	JNB Services LLC Top agencies DOT (Department of Transportation)	$179,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
21	Krisher Electric LLC Top agencies DOT (Department of Transportation)	$148,800	0.1%	Rank history: #25 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
22	Perry & Davis Enterprise LLC Top agencies DOT (Department of Transportation)	$146,955	0.1%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; up 2 since Jul 2024–Jun 2025.
23	RG Tenney Electric Inc Top agencies DOT (Department of Transportation)	$133,425	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
24	Core Consolidated LLC Top agencies DOT (Department of Transportation)	$82,488	<0.1%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2023, #21 in FY2024 and #22 in FY2025; down 11 since Jul 2024–Jun 2025.
25	Lonergan Electric Service Inc. Top agencies DOT (Department of Transportation)	$75,828	<0.1%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #13 in FY2025; down 18 since Jul 2024–Jun 2025.
26	Lacusong Leilani Top agencies DOT (Department of Transportation)	$56,432	<0.1%	Rank history: #29 in FY2021, not on the FY2022–FY2024 lists and #29 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27	J G Contracting Top agencies DOT (Department of Transportation)	$54,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; new, not ranked in Jul 2024–Jun 2025.
28	Sunshine Roofing Solutions LLC Top agencies DOT (Department of Transportation)	$50,448	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
29	Groundprobe North America LLC Top agencies DOE (Department of Energy)	$47,500	<0.1%	Rank history: not on the FY2021–FY2024 lists and #32 in FY2025; new, not ranked in Jul 2024–Jun 2025.
30	Brown International Corporation Top agencies USAF (Department of the Air Force)	$36,369	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
31	ERI Enterprises, LLC Top agencies DOT (Department of Transportation)	$27,999	<0.1%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; new, not ranked in Jul 2024–Jun 2025.
32	Specialty Consulting, Inc. Top agencies DOT (Department of Transportation)	$24,050	<0.1%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; new, not ranked in Jul 2024–Jun 2025.
33	Peerless Plumbing Company, Inc. Top agencies DOT (Department of Transportation)	$21,600	<0.1%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; new, not ranked in Jul 2024–Jun 2025.
34	Heidelberg Resources, LLC Top agencies DOT (Department of Transportation)	$16,807	<0.1%	Rank history: not on the FY2021–FY2024 lists and #18 in FY2025; down 13 since Jul 2024–Jun 2025.
35	Shellback Construction LLC Top agencies DOT (Department of Transportation)	$15,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; new, not ranked in Jul 2024–Jun 2025.
36	Saab Inc. Top agencies DOS (Department of State)	$14,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #5 in FY2025; down 32 since Jul 2024–Jun 2025.
37	Flex Electric LLC Top agencies Army (Department of the Army)	$11,362	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
38	Sun Environmental Corp. Top agencies Army (Department of the Army)	$9,097	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
39	KEO & Associates Inc. Top agencies DOT (Department of Transportation)	$8,181	<0.1%	Rank history: #9 in FY2021, #37 in FY2022, #32 in FY2023, #19 in FY2024 and #45 in FY2025; down 25 since Jul 2024–Jun 2025.
40	Kobo Utility Construction Corp. Top agencies DOT (Department of Transportation)	$6,684	<0.1%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; down 29 since Jul 2024–Jun 2025.
41	Synergy Electric Company, Inc. Top agencies Navy (Department of the Navy)	$6,602	<0.1%	Rank history: not on the FY2021 list, #5 in FY2022, not on the FY2023 list, #29 in FY2024 and #46 in FY2025; down 3 since Jul 2024–Jun 2025.
42	Greater Southwest Constructors Inc. Top agencies DOT (Department of Transportation)	$3,419	<0.1%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2023, not on the FY2024 list and #20 in FY2025; down 22 since Jul 2024–Jun 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 $207 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.

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