Top 28 Contractors in PSC H345: Inspection and Laboratory Services (except medical/dental): Plumbing, Heating, and Waste Disposal Equipment, FY2023

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Sure Drain, LLC Top agencies USDA (Department of Agriculture)	$699,425	52.7%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2024 and #1 in FY2025; new.
2	Caldaia Controls LLC 2 awardees Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior)	$149,014	11.2%	Rank history: #8 in FY2021, #2 in FY2022, #3 in FY2024 and #2 in FY2025; unchanged since FY2022.
3	Tustin Mechanical Services LLC Top agencies DOT (Department of Transportation)	$65,136	4.9%	Rank history: #5 in FY2021, #4 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
4	Coastal Inspection Services,Incorporated Top agencies VA (Department of Veterans Affairs)	$49,120	3.7%	Rank history: not on the FY2021 list, #26 in FY2022 and not on the FY2024–FY2025 lists; up 22 since FY2022.
5	Green and Sustainable Services, LLC Top agencies VA (Department of Veterans Affairs)	$44,976	3.4%	Rank history: not on the FY2021 list, #5 in FY2022, #8 in FY2024 and #6 in FY2025; unchanged since FY2022.
6	Venergy Group LLC Top agencies VA (Department of Veterans Affairs)	$40,112	3.0%	Rank history: not on the FY2021–FY2022 lists, #12 in FY2024 and #9 in FY2025; new.
7	Perennial Zero Waste LLC Top agencies USDA (Department of Agriculture)	$34,400	2.6%	Rank history: #7 in FY2021, #7 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
8	Aeonrg LLC Top agencies VA (Department of Veterans Affairs)	$20,983	1.6%	Rank history: #16 in FY2021, #11 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
9	Energy Resources Corporation Top agencies VA (Department of Veterans Affairs)	$19,838	1.5%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2024 and #15 in FY2025; new.
10	ENP Environmental Inc. Top agencies DOT (Department of Transportation)	$19,007	1.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
11	Mark-Vii Enterprises, Inc. Top agencies VA (Department of Veterans Affairs)	$13,750	1.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
12	Am Consultants, Inc. Top agencies VA (Department of Veterans Affairs)	$13,253	1.0%	Rank history: not on the FY2021 list, #15 in FY2022, #26 in FY2024 and #21 in FY2025; up 3 since FY2022.
13	Chauffage Eylenbosch, Anc. ETS - Eylenbosch Verwarming, OPV Top agencies DOS (Department of State)	$12,892	1.0%	Rank history: not on the FY2021 list, #16 in FY2022, #32 in FY2024 and not on the FY2025 list; up 3 since FY2022.
14	Boston Green Fuel Co., LLC Top agencies DLA (Defense Logistics Agency)	$11,760	0.9%	Rank history: #25 in FY2021, #19 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
15	Snows Fuel Company LLC Top agencies DOI (Department of the Interior)	$10,926	0.8%	Rank history: not on the FY2021 list, #21 in FY2022 and not on the FY2024–FY2025 lists; up 6 since FY2022.
16	Choggiung Ltd Through Inland Empire Fire Protection, LLC Top agencies VA (Department of Veterans Affairs)	$10,886	0.8%	Rank history: #34 in FY2021, #24 in FY2022, #27 in FY2024 and not on the FY2025 list; up 8 since FY2022.
17	Rydvet LLC Top agencies VA (Department of Veterans Affairs)	$10,550	0.8%	Rank history: #24 in FY2021, #20 in FY2022, #19 in FY2024 and #23 in FY2025; up 3 since FY2022.
18	1550940 Ontario Inc Through Taillefer Plumbing & Heating Inc. Top agencies DOS (Department of State)	$10,069	0.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
19	Ascent Mechanical and Plumbing Inc. Top agencies VA (Department of Veterans Affairs)	$9,883	0.7%	Rank history: #29 in FY2021, #22 in FY2022, #21 in FY2024 and #25 in FY2025; up 3 since FY2022.
20	Byron Gibbons Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior)	$7,994	0.6%	Rank history: #31 in FY2021, #28 in FY2022, #25 in FY2024 and #33 in FY2025; up 8 since FY2022.
21	Talon Veteran Services Incorporated Top agencies VA (Department of Veterans Affairs)	$6,970	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
22	Fitzgerald Contractors, LLC Top agencies DOI (Department of the Interior)	$6,880	0.5%	Rank history: #33 in FY2021, #25 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
23	Zero Medical Waste Corp. Top agencies USDA (Department of Agriculture)	$6,240	0.5%	Rank history: not on the FY2021 list, #29 in FY2022, #31 in FY2024 and not on the FY2025 list; up 6 since FY2022.
24	Boiler & Property Consulting LLC Top agencies DHS (Department of Homeland Security)	$6,000	0.5%	Rank history: #36 in FY2021, not on the FY2022 list, #22 in FY2024 and not on the FY2025 list; returned.
25	Heath Consultants Inc. Top agencies DOJ (Department of Justice)	$3,504	0.3%	Rank history: #40 in FY2021, #33 in FY2022, #30 in FY2024 and #39 in FY2025; up 8 since FY2022.
26	Atlantic First Industries Corporation Top agencies VA (Department of Veterans Affairs)	$2,925	0.2%	Rank history: not on the FY2021 list, #35 in FY2022, #23 in FY2024 and #42 in FY2025; up 9 since FY2022.
27	Waste Connections US Holdings Inc. Through American Disposal Services, Inc. Top agencies DOJ (Department of Justice)	$1,294	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
28	Coastline Ltd. Top agencies DLA (Defense Logistics Agency)	$521	<0.1%	Rank history: not on the FY2021 list, #36 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.

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 $1.33 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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.

Quick answers