Top 35 Contractors in PSC Z1NA: Maintenance of Fuel Supply Facilities, Jul 2025–Jun 2026

Name: Top 35 Contractors in PSC Z1NA: Maintenance of Fuel Supply Facilities, 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 75% of PSC Z1NA contract dollars from July 2025 through June 2026

Contract obligations: $226,961,313 Net of deobligations, by contracts coded PSC Z1NA
Contractors: 40 Parent companies with an obligation
Largest contractor: Pond Constructors Inc. $73.1 million, 24.2% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 35 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Pond Constructors Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$73,056,556	24.2%	Rank history: #4 in FY2021, #3 in FY2022, #3 in FY2023, #2 in FY2024 and #1 in FY2025; unchanged since Jul 2024–Jun 2025.
2	Weston Solutions Holdings Inc Through Weston Solutions Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$49,723,857	16.5%	Rank history: #1 in FY2021, #2 in FY2022, #2 in FY2023, #3 in FY2024 and #2 in FY2025; new, not ranked in Jul 2024–Jun 2025.
3	Guidehouse Inc. 2 awardees, including Aptim Federal Services, LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$41,856,913	13.9%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and #4 in FY2025; down 1 since Jul 2024–Jun 2025.
4	Tetra TECH Inc. 2 awardees Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$28,801,388	9.5%	Rank history: #8 in FY2021, #5 in FY2022, #5 in FY2023, #4 in FY2024 and #3 in FY2025; unchanged since Jul 2024–Jun 2025.
5	VGS Infrastructure Services Inc. Top agencies DLA (Defense Logistics Agency)	$16,933,539	5.6%	Rank history: #11 in FY2021, not on the FY2022–FY2023 lists, #5 in FY2024 and not on the FY2025 list; unchanged since Jul 2024–Jun 2025.
6	Ecco GMBH Top agencies Army (Department of the Army)	$4,118,536	1.4%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; up 14 since Jul 2024–Jun 2025.
7	Tepco Energy Partner, Incorporated Top agencies Navy (Department of the Navy)	$3,444,212	1.1%	Rank history: not on the FY2021–FY2023 lists, #11 in FY2024 and #14 in FY2025; up 1 since Jul 2024–Jun 2025.
8	Witco Industries Ltd. Top agencies USAF (Department of the Air Force)	$3,293,711	1.1%	Rank history: not on the FY2021–FY2024 lists and #9 in FY2025; new, not ranked in Jul 2024–Jun 2025.
9	Amentum Holdings, Inc. 2 awardees, including Amentum Technology, Inc. and Amentum Design and Facility Management Top agencies Navy (Department of the Navy) Army (Department of the Army)	$3,050,997	1.0%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; up 17 since Jul 2024–Jun 2025.
10	Environmental Chemical Corporation Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$2,516,824	0.8%	Rank history: #9 in FY2021, #8 in FY2022, #7 in FY2023, #8 in FY2024 and #7 in FY2025; down 3 since Jul 2024–Jun 2025.
11	Environmental Chemical Corporation Italy S.R.L. Top agencies Army (Department of the Army)	$2,334,439	0.8%	Rank history: not on the FY2021–FY2023 lists, #12 in FY2024 and #11 in FY2025; down 1 since Jul 2024–Jun 2025.
12	JBW Group LLC Top agencies Army (Department of the Army)	$2,253,054	0.7%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; new, not ranked in Jul 2024–Jun 2025.
13	Golder Europe Service Centre SRL Through WSP Italia S.R.L. Top agencies Army (Department of the Army)	$2,189,375	0.7%	Rank history: not on the FY2021–FY2024 lists and #16 in FY2025; up 1 since Jul 2024–Jun 2025.
14	ECC Mezz LLC Top agencies Army (Department of the Army)	$958,484	0.3%	Rank history: not on the FY2021–FY2023 lists, #15 in FY2024 and #13 in FY2025; down 1 since Jul 2024–Jun 2025.
15	Austin Brockenbrough & Associates LLC Top agencies DLA (Defense Logistics Agency)	$620,243	0.2%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; new, not ranked in Jul 2024–Jun 2025.
16	Fluid Solutions LLC Top agencies DOS (Department of State)	$449,314	0.1%	Rank history: #19 in FY2021, #18 in FY2022, #15 in FY2023, #28 in FY2024 and #18 in FY2025; up 3 since Jul 2024–Jun 2025.
17	Tsontos, Michael M., S.A. Top agencies Navy (Department of the Navy)	$412,201	0.1%	Rank history: #21 in FY2021, not on the FY2022–FY2023 lists, #20 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
18	GKG Contractors LLC Top agencies Navy (Department of the Navy)	$363,506	0.1%	Rank history: not on the FY2021–FY2024 lists and #15 in FY2025; down 2 since Jul 2024–Jun 2025.
19	Skookum Educational Programs Top agencies Navy (Department of the Navy)	$234,736	0.1%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; new, not ranked in Jul 2024–Jun 2025.
20	Chugach Solutions Enterprise, LLC Top agencies Navy (Department of the Navy)	$207,676	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
21	Tidewater, Inc. Top agencies DOS (Department of State)	$173,369	0.1%	Rank history: #20 in FY2021, #19 in FY2022, #18 in FY2023, #27 in FY2024 and #20 in FY2025; up 3 since Jul 2024–Jun 2025.
22	Anointed Hands Services LLC Top agencies Navy (Department of the Navy)	$61,927	<0.1%	Rank history: not on the FY2021–FY2024 lists and #29 in FY2025; new, not ranked in Jul 2024–Jun 2025.
23	Al Dobowi FZE Top agencies DOS (Department of State)	$60,434	<0.1%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; new, not ranked in Jul 2024–Jun 2025.
24	Applied Remediation Company Inc. Top agencies USAF (Department of the Air Force)	$57,240	<0.1%	Rank history: not on the FY2021–FY2023 lists, #31 in FY2024 and #25 in FY2025; up 3 since Jul 2024–Jun 2025.
25	Maquinas Diesel Top agencies DOS (Department of State)	$47,122	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
26	Vision Contracting Inc. Top agencies DOI (Department of the Interior)	$40,892	<0.1%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27	PB Hoidale Co Inc. Top agencies USDA (Department of Agriculture)	$38,944	<0.1%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; up 14 since Jul 2024–Jun 2025.
28	Phoenix International Holdings Inc. Top agencies Navy (Department of the Navy)	$29,437	<0.1%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; up 2 since Jul 2024–Jun 2025.
29	Reycor Inc Top agencies Navy (Department of the Navy)	$24,588	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
30	Mannon Mechanical LLC Top agencies DHS (Department of Homeland Security)	$24,460	<0.1%	Rank history: not on the FY2021–FY2024 lists and #30 in FY2025; up 6 since Jul 2024–Jun 2025.
31	I-2-I Solutions, Inc. Top agencies Commerce (Department of Commerce)	$18,066	<0.1%	Rank history: not on the FY2021–FY2024 lists and #35 in FY2025; new, not ranked in Jul 2024–Jun 2025.
32	Syn-Tech System, Inc. Top agencies USDA (Department of Agriculture)	$11,010	<0.1%	Rank history: #32 in FY2021, #34 in FY2022, #29 in FY2023, #41 in FY2024 and #36 in FY2025; up 5 since Jul 2024–Jun 2025.
33	Ilkwang E&C Co., Ltd. Top agencies DLA (Defense Logistics Agency)	$8,090	<0.1%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #39 in FY2025; down 18 since Jul 2024–Jun 2025.
34	Apex Integrity Inspections LLC Top agencies Army (Department of the Army)	$6,443	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
35	Monument Construction Services, LLC Top agencies VA (Department of Veterans Affairs)	$5,200	<0.1%	Rank history: not on the FY2021–FY2023 lists, #13 in FY2024 and #23 in FY2025; down 23 since Jul 2024–Jun 2025.

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35 of 40 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 $302 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 Z1NA contractors in Jul 2025–Jun 2026?

1. Pond Constructors Inc. ($73.1M), 2. Weston Solutions Holdings Inc ($49.7M), 3. Guidehouse Inc. ($41.9M), 4. Tetra TECH Inc. ($28.8M), 5. VGS Infrastructure Services Inc. ($16.9M), 6. Ecco GMBH ($4.12M), 7. Tepco Energy Partner, Incorporated ($3.44M), 8. Witco Industries Ltd. ($3.29M), 9. Amentum Holdings, Inc. ($3.05M), 10. Environmental Chemical Corporation ($2.52M).

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