Top 100 Contractors in PSC F103: Water Quality Support Services, Jul 2025–Jun 2026

Name: Top 100 Contractors in PSC F103: Water Quality Support Services, 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 52% of PSC F103 contract dollars from July 2025 through June 2026

Contract obligations: $29,885,373 Net of deobligations, by contracts coded PSC F103
Contractors: 163 Parent companies with an obligation
Largest contractor: Versar-Envirocon JV $2.76 million, 8.5% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Versar-Envirocon JV Top agencies EPA (Environmental Protection Agency)	$2,756,210	8.5%	Rank history: not on the FY2021 list, #11 in FY2022, #2 in FY2023, #7 in FY2024 and #5 in FY2025; up 8 since Jul 2024–Jun 2025.
2	Koman Government Solutions LLC Top agencies Army (Department of the Army)	$2,503,935	7.7%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #4 in FY2025; up 17 since Jul 2024–Jun 2025.
3	Potomac Environmental Inc. Top agencies Navy (Department of the Navy)	$1,963,913	6.1%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2023, #4 in FY2024 and #6 in FY2025; up 2 since Jul 2024–Jun 2025.
4	EQ & CH Remediation Top agencies EPA (Environmental Protection Agency)	$1,852,268	5.7%	Rank history: not on the FY2021 list, #1 in FY2022, not on the FY2023–FY2024 lists and #13 in FY2025; up 26 since Jul 2024–Jun 2025.
5	Hana Engineers & Consultants LLC Top agencies Army (Department of the Army)	$1,801,803	5.6%	Rank history: not on the FY2021–FY2023 lists, #75 in FY2024 and #46 in FY2025; up 35 since Jul 2024–Jun 2025.
6	Association of Consultants and Engineers Top agencies Navy (Department of the Navy)	$1,616,809	5.0%	Rank history: #10 in FY2021, not on the FY2022–FY2023 lists, #8 in FY2024 and #7 in FY2025; unchanged since Jul 2024–Jun 2025.
7	Meadows Cmpg, Inc. Top agencies Navy (Department of the Navy)	$1,369,853	4.2%	Rank history: #3 in FY2021, #4 in FY2022, #10 in FY2023, #5 in FY2024 and #3 in FY2025; down 3 since Jul 2024–Jun 2025.
8	Ecolab Inc. 2 awardees, including Nalco Company LLC and Barclay Water Management, Inc. Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$1,234,696	3.8%	Rank history: #17 in FY2021, not on the FY2022–FY2023 lists, #28 in FY2024 and #9 in FY2025; up 14 since Jul 2024–Jun 2025.
9	Seaon Environmental LLC Top agencies Navy (Department of the Navy)	$932,279	2.9%	Rank history: #1 in FY2021, #2 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; down 8 since Jul 2024–Jun 2025.
10	TCS Services LLC Top agencies VA (Department of Veterans Affairs)	$812,728	2.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
11	HGS Engineering Inc. Top agencies VA (Department of Veterans Affairs)	$720,156	2.2%	Rank history: #21 in FY2021, #31 in FY2022, #21 in FY2023, #12 in FY2024 and #15 in FY2025; up 4 since Jul 2024–Jun 2025.
12	Alhoty Analytical Services W.l.l Top agencies Navy (Department of the Navy)	$634,504	2.0%	Rank history: #22 in FY2021, #21 in FY2022, #30 in FY2023, #15 in FY2024 and #21 in FY2025; up 6 since Jul 2024–Jun 2025.
13	Anamar Environmental Consulting, Inc. Top agencies Army (Department of the Army)	$626,280	1.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
14	Venergy Group LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$559,706	1.7%	Rank history: #12 in FY2021, #5 in FY2022, #11 in FY2023, #10 in FY2024 and #10 in FY2025; down 4 since Jul 2024–Jun 2025.
15	Hyperion Biotechnology, Inc. Top agencies VA (Department of Veterans Affairs)	$488,891	1.5%	Rank history: not on the FY2021 list, #77 in FY2022, #26 in FY2023, #35 in FY2024 and #23 in FY2025; up 6 since Jul 2024–Jun 2025.
16	Vets-Tidewater LLC Top agencies Navy (Department of the Navy)	$483,379	1.5%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; new, not ranked in Jul 2024–Jun 2025.
17	Phigenics LLC Top agencies VA (Department of Veterans Affairs)	$479,286	1.5%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #17 in FY2025; down 6 since Jul 2024–Jun 2025.
18	Credere Associates, LLC Top agencies Army (Department of the Army)	$431,981	1.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
19	Mecx, Inc. Top agencies VA (Department of Veterans Affairs)	$423,235	1.3%	Rank history: #59 in FY2021, #39 in FY2022, #31 in FY2023, #30 in FY2024 and #16 in FY2025; down 3 since Jul 2024–Jun 2025.
20	I-2-I Solutions, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$377,074	1.2%	Rank history: not on the FY2021–FY2023 lists, #54 in FY2024 and #24 in FY2025; up 27 since Jul 2024–Jun 2025.
21	Bluestone Interspec JV, LLC Top agencies Navy (Department of the Navy)	$360,464	1.1%	Rank history: not on the FY2021 list, #7 in FY2022, #6 in FY2023, #26 in FY2024 and not on the FY2025 list; up 98 since Jul 2024–Jun 2025.
22	Cetec-Cleveland Environmental Technologies Inc. Top agencies VA (Department of Veterans Affairs)	$345,269	1.1%	Rank history: not on the FY2021–FY2023 lists, #41 in FY2024 and #27 in FY2025; up 16 since Jul 2024–Jun 2025.
23	Bluestone Environmental Group, Inc. Top agencies Army (Department of the Army)	$339,819	1.0%	Rank history: not on the FY2021 list, #15 in FY2022, #17 in FY2023, #16 in FY2024 and #19 in FY2025; up 83 since Jul 2024–Jun 2025.
24	Dawson Mcg, Inc. Top agencies Army (Department of the Army)	$329,217	1.0%	Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; new, not ranked in Jul 2024–Jun 2025.
25	Babcock Laboratories, Inc. Top agencies Navy (Department of the Navy)	$317,681	1.0%	Rank history: #19 in FY2021, #19 in FY2022, #22 in FY2023, #14 in FY2024 and #22 in FY2025; down 8 since Jul 2024–Jun 2025.
26	ABT Global LLC Top agencies EPA (Environmental Protection Agency)	$314,824	1.0%	Rank history: #2 in FY2021, #6 in FY2022, #3 in FY2023, #3 in FY2024 and #11 in FY2025; down 23 since Jul 2024–Jun 2025.
27	Erin Enerji Taahhut Insaat Sanayi VE Ticaret Limited Sirketi Top agencies DHA (Defense Health Agency)	$280,525	0.9%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023, #65 in FY2024 and #31 in FY2025; up 16 since Jul 2024–Jun 2025.
28	RLM Government Services LLC Top agencies VA (Department of Veterans Affairs)	$260,470	0.8%	Rank history: not on the FY2021 list, #18 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
29	EWA Direction Inc. Top agencies VA (Department of Veterans Affairs)	$238,039	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
30	Pi3E JV LLP Top agencies Navy (Department of the Navy)	$232,649	0.7%	Rank history: not on the FY2021 list, #25 in FY2022, #27 in FY2023, #19 in FY2024 and #29 in FY2025; down 3 since Jul 2024–Jun 2025.
31	Westover Roofing, LLC Top agencies Army (Department of the Army)	$207,425	0.6%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2023, #25 in FY2024 and #26 in FY2025; down 7 since Jul 2024–Jun 2025.
32	Upper Mississippi River Basin Association Top agencies Army (Department of the Army)	$203,774	0.6%	Rank history: #53 in FY2021, not on the FY2022 list, #36 in FY2023, #33 in FY2024 and #36 in FY2025; up 3 since Jul 2024–Jun 2025.
33	OYO Corporation, Pacific Top agencies Navy (Department of the Navy)	$203,714	0.6%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2023, #40 in FY2024 and not on the FY2025 list; up 42 since Jul 2024–Jun 2025.
34	Fluid Handling LLC 2 awardees, including Evoqua Water Technologies LLC Top agencies VA (Department of Veterans Affairs)	$198,626	0.6%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; up 73 since Jul 2024–Jun 2025.
35	Chem-Aqua Inc Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$186,199	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
36	Inner Basin Environmental LLC Top agencies DOI (Department of the Interior)	$176,147	0.5%	Rank history: not on the FY2021–FY2025 lists; up 72 since Jul 2024–Jun 2025.
37	CDM Federal Services Europe Joint Venture Top agencies Army (Department of the Army)	$149,440	0.5%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023, #36 in FY2024 and #38 in FY2025; up 2 since Jul 2024–Jun 2025.
38	Bayland Consultants & Designers Inc. Top agencies VA (Department of Veterans Affairs)	$142,290	0.4%	Rank history: not on the FY2021–FY2023 lists, #31 in FY2024 and #44 in FY2025; up 11 since Jul 2024–Jun 2025.
39	Aviate Enterprises, Inc. Top agencies VA (Department of Veterans Affairs)	$137,118	0.4%	Rank history: not on the FY2021 list, #61 in FY2022, #7 in FY2023, #37 in FY2024 and #40 in FY2025; down 16 since Jul 2024–Jun 2025.
40	Eurofins EAG Agroscience LLC 2 awardees, including Eurofins Lancaster Laboratories LLC and Eurofins Environment Testing South Central, LLC Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture) DHA (Defense Health Agency)	$137,111	0.4%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and #57 in FY2025; up 13 since Jul 2024–Jun 2025.
41	Accord Federal Services, LLC Top agencies VA (Department of Veterans Affairs)	$126,275	0.4%	Rank history: #14 in FY2021, #9 in FY2022, #15 in FY2023, not on the FY2024 list and #14 in FY2025; down 27 since Jul 2024–Jun 2025.
42	Rural and Tribal Environmental Solutions, Inc. Top agencies EPA (Environmental Protection Agency)	$122,927	0.4%	Rank history: #45 in FY2021, #28 in FY2022, #19 in FY2023, #21 in FY2024 and #28 in FY2025; down 16 since Jul 2024–Jun 2025.
43	Nancy Miller Top agencies DOI (Department of the Interior)	$121,824	0.4%	Rank history: not on the FY2021–FY2024 lists and #67 in FY2025; new, not ranked in Jul 2024–Jun 2025.
44	DHL Analytical Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$109,671	0.3%	Rank history: #55 in FY2021, #32 in FY2022, #43 in FY2023, not on the FY2024 list and #34 in FY2025; up 8 since Jul 2024–Jun 2025.
45	D & D Laboratory LLC Top agencies VA (Department of Veterans Affairs)	$108,318	0.3%	Rank history: #60 in FY2021, #52 in FY2022, #49 in FY2023, #55 in FY2024 and #98 in FY2025; up 41 since Jul 2024–Jun 2025.
46	Environmental Science Corporation 2 awardees Top agencies Army (Department of the Army)	$107,435	0.3%	Rank history: not on the FY2021 list, #12 in FY2022, #29 in FY2023, not on the FY2024 list and #58 in FY2025; up 20 since Jul 2024–Jun 2025.
47	Terraphase Engineering Inc. Top agencies DOT (Department of Transportation)	$106,049	0.3%	Rank history: #47 in FY2021, #41 in FY2022, not on the FY2023 list, #47 in FY2024 and #47 in FY2025; new, not ranked in Jul 2024–Jun 2025.
48	J.r. Henderson Labs, Inc. Top agencies Navy (Department of the Navy)	$102,120	0.3%	Rank history: #44 in FY2021, #40 in FY2022, #46 in FY2023, #48 in FY2024 and #48 in FY2025; up 6 since Jul 2024–Jun 2025.
49	Pi2E JV LLP Top agencies Navy (Department of the Navy)	$95,770	0.3%	Rank history: #34 in FY2021, #35 in FY2022, #41 in FY2023, #18 in FY2024 and #12 in FY2025; down 36 since Jul 2024–Jun 2025.
50	City of Salem Top agencies VA (Department of Veterans Affairs)	$93,150	0.3%	Rank history: not on the FY2021–FY2023 lists, #49 in FY2024 and #49 in FY2025; up 8 since Jul 2024–Jun 2025.
51	Alliance Solutions Group, Inc. Top agencies DHA (Defense Health Agency)	$91,928	0.3%	Rank history: #30 in FY2021, #37 in FY2022, #40 in FY2023, #46 in FY2024 and #50 in FY2025; up 5 since Jul 2024–Jun 2025.
52	Patterson Professional Services LLC Top agencies USAF (Department of the Air Force)	$91,162	0.3%	Rank history: not on the FY2021–FY2023 lists, #42 in FY2024 and #51 in FY2025; up 5 since Jul 2024–Jun 2025.
53	Agile Facilities Solutions, LLC Top agencies Navy (Department of the Navy)	$90,878	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
54	Institute of Global Environment, Korea Top agencies Army (Department of the Army)	$89,670	0.3%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; new, not ranked in Jul 2024–Jun 2025.
55	Kuntz Environmental Services LLC Top agencies DOJ (Department of Justice)	$89,300	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
56	Eurofins Lancaster Laboratories Environment Testing, LLC Top agencies Navy (Department of the Navy)	$86,916	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
57	Jackson Ryan Construction Services, Inc. Top agencies VA (Department of Veterans Affairs)	$86,400	0.3%	Rank history: not on the FY2021 list, #49 in FY2022, #54 in FY2023, #91 in FY2024 and #60 in FY2025; down 9 since Jul 2024–Jun 2025.
58	CT Laboratories, LLC Top agencies Army (Department of the Army)	$85,930	0.3%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; up 10 since Jul 2024–Jun 2025.
59	Ronielle Howard & Associates LLC Top agencies Army (Department of the Army)	$84,664	0.3%	Rank history: #52 in FY2021, #47 in FY2022, #53 in FY2023, #58 in FY2024 and #55 in FY2025; up 1 since Jul 2024–Jun 2025.
60	Vision Research Group LLC Top agencies Navy (Department of the Navy)	$81,500	0.3%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; new, not ranked in Jul 2024–Jun 2025.
61	Pace Analytical Services LLC Top agencies DOI (Department of the Interior) Army (Department of the Army)	$78,774	0.2%	Rank history: not on the FY2021–FY2023 lists, #51 in FY2024 and #66 in FY2025; down 25 since Jul 2024–Jun 2025.
62	Bio-Chem Lab Inc. Top agencies Army (Department of the Army)	$78,700	0.2%	Rank history: #67 in FY2021, #86 in FY2022, not on the FY2023–FY2024 lists and #42 in FY2025; up 3 since Jul 2024–Jun 2025.
63	Paleowest LLC Top agencies Army (Department of the Army)	$76,518	0.2%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; new, not ranked in Jul 2024–Jun 2025.
64	Clarity Water Technologies LLC Top agencies VA (Department of Veterans Affairs)	$69,730	0.2%	Rank history: not on the FY2021–FY2022 lists, #25 in FY2023, #60 in FY2024 and #65 in FY2025; down 3 since Jul 2024–Jun 2025.
65	Environmental Quality, Inc. Top agencies VA (Department of Veterans Affairs)	$66,832	0.2%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2023, not on the FY2024 list and #91 in FY2025; up 31 since Jul 2024–Jun 2025.
66	Virginia Water Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$65,170	0.2%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 16 since Jul 2024–Jun 2025.
67	Verda Medical Systems, LLC Top agencies VA (Department of Veterans Affairs)	$65,126	0.2%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2023, #71 in FY2024 and not on the FY2025 list; up 60 since Jul 2024–Jun 2025.
68	NCH Corporation Through Chem-Aqua Inc. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$61,788	0.2%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; up 8 since Jul 2024–Jun 2025.
69	Willbanks Environmental Consulting, Inc. Top agencies VA (Department of Veterans Affairs)	$61,025	0.2%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; new, not ranked in Jul 2024–Jun 2025.
70	Kokowski Plumbing LLC Top agencies VA (Department of Veterans Affairs)	$60,000	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
71	Fidelis Sustainability Distribution LLC Top agencies VA (Department of Veterans Affairs)	$57,435	0.2%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; new, not ranked in Jul 2024–Jun 2025.
72	Fourtune 4 Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$55,673	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
73	Garratt-Callahan Company Top agencies VA (Department of Veterans Affairs)	$51,799	0.2%	Rank history: #84 in FY2021, #70 in FY2022, #91 in FY2023, #82 in FY2024 and #77 in FY2025; down 2 since Jul 2024–Jun 2025.
74	The Cadmus Group LLC Top agencies HHS (Department of Health and Human Services)	$51,749	0.2%	Rank history: not on the FY2021 list, #59 in FY2022, #72 in FY2023, #79 in FY2024 and #76 in FY2025; down 2 since Jul 2024–Jun 2025.
75	Aquatech Compliance Services LLC Top agencies Army (Department of the Army)	$51,475	0.2%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; up 27 since Jul 2024–Jun 2025.
76	Water Quality Specialists Top agencies DOI (Department of the Interior)	$51,288	0.2%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023, #84 in FY2024 and #80 in FY2025; down 2 since Jul 2024–Jun 2025.
77	Cuna Supply LLC Top agencies VA (Department of Veterans Affairs)	$50,753	0.2%	Rank history: not on the FY2021 list, #93 in FY2022, #84 in FY2023, #53 in FY2024 and not on the FY2025 list; up 44 since Jul 2024–Jun 2025.
78	Benjamin Miller Top agencies USDA (Department of Agriculture)	$49,000	0.2%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; new, not ranked in Jul 2024–Jun 2025.
79	Analytical Services Corporation Top agencies USAF (Department of the Air Force)	$47,342	0.1%	Rank history: not on the FY2021–FY2023 lists, #92 in FY2024 and #87 in FY2025; up 8 since Jul 2024–Jun 2025.
80	Itelyum Purification SPA Through Innovazione Chimica S.R.L. Top agencies Army (Department of the Army)	$45,763	0.1%	Rank history: not on the FY2021–FY2025 lists; up 24 since Jul 2024–Jun 2025.
81	Egc, Inc. Top agencies USAF (Department of the Air Force)	$41,969	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
82	Great Lakes Environmental Center, Inc. Top agencies USDA (Department of Agriculture)	$40,485	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
83	Charlie Pepper AZ, Inc. Top agencies VA (Department of Veterans Affairs)	$38,603	0.1%	Rank history: not on the FY2021 list, #62 in FY2022, #95 in FY2023, #78 in FY2024 and #74 in FY2025; down 13 since Jul 2024–Jun 2025.
84	Aqua-Serv Engineers, Inc. Top agencies USAF (Department of the Air Force)	$38,123	0.1%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; new, not ranked in Jul 2024–Jun 2025.
85	Guillermo Landeros Top agencies DOI (Department of the Interior)	$36,000	0.1%	Rank history: #77 in FY2021, not on the FY2022–FY2023 lists, #94 in FY2024 and #61 in FY2025; unchanged since Jul 2024–Jun 2025.
86	Total Solution LLC Top agencies DOI (Department of the Interior)	$35,500	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
87	Water Management Laboratories Inc. Top agencies DOI (Department of the Interior)	$35,229	0.1%	Rank history: #87 in FY2021, #90 in FY2022, #90 in FY2023, not on the FY2024 list and #86 in FY2025; up 6 since Jul 2024–Jun 2025.
88	Sijora Enterprises LLC Top agencies Army (Department of the Army)	$32,400	0.1%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2023, #95 in FY2024 and #89 in FY2025; unchanged since Jul 2024–Jun 2025.
89	Fire and Safety Team LLC Top agencies DOI (Department of the Interior)	$30,545	0.1%	Rank history: not on the FY2021–FY2023 lists, #83 in FY2024 and #37 in FY2025; down 56 since Jul 2024–Jun 2025.
90	Marsil Laboratories LLC Top agencies VA (Department of Veterans Affairs)	$29,925	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
91	Forus Contracting, Inc. Top agencies Navy (Department of the Navy)	$29,522	0.1%	Rank history: not on the FY2021–FY2024 lists and #95 in FY2025; new, not ranked in Jul 2024–Jun 2025.
92	Schnabel Engineering, LLC Top agencies DOJ (Department of Justice)	$29,435	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
93	Environmental Control Center Co., Ltd. Top agencies Army (Department of the Army)	$28,883	0.1%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; down 2 since Jul 2024–Jun 2025.
94	Martin Scott N Top agencies DOI (Department of the Interior)	$27,800	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
95	Liquitech, Inc. Top agencies VA (Department of Veterans Affairs)	$25,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
96	JW Environmental LLC Top agencies Army (Department of the Army)	$22,950	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
97	Legend Technical Services of Arizona, Inc. Top agencies DOI (Department of the Interior)	$21,847	0.1%	Rank history: #57 in FY2021, #91 in FY2022, #68 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
98	Gaylon Duane Johnson LLC Top agencies DLA (Defense Logistics Agency)	$21,291	0.1%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; unchanged since Jul 2024–Jun 2025.
99	Techlaw Consultants Inc. Top agencies EPA (Environmental Protection Agency)	$21,205	0.1%	Rank history: not on the FY2021–FY2025 lists; unchanged since Jul 2024–Jun 2025.
100	International Chemtex Corp Top agencies HHS (Department of Health and Human Services)	$21,111	0.1%	Rank history: not on the FY2021–FY2023 lists, #89 in FY2024 and not on the FY2025 list; up 9 since Jul 2024–Jun 2025.

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100 of 163 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 $32.4 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.
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 F103 contractors in Jul 2025–Jun 2026?

1. Versar-Envirocon JV ($2.76M), 2. Koman Government Solutions LLC ($2.5M), 3. Potomac Environmental Inc. ($1.96M), 4. EQ & CH Remediation ($1.85M), 5. Hana Engineers & Consultants LLC ($1.8M), 6. Association of Consultants and Engineers ($1.62M), 7. Meadows Cmpg, Inc. ($1.37M), 8. Ecolab Inc. ($1.23M), 9. Seaon Environmental LLC ($932K), 10. TCS Services LLC ($813K).

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