Top 100 Contractors in PSC 45: Plumbing, Heating, Waste Disposal, Aug 2025–Jul 2026
Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Code page on GovTribe
The latest 12 months. See the newest fiscal year's list: Top Contractors in PSC 45: Plumbing, Heating, Waste Disposal, FY2025.
The top 10 won 41% of PSC 45 contract dollars from August 2025 through July 2026
Ranking facts
- Contract obligations
- $106,642,937 Net of deobligations, by contracts coded PSC 45 or a code under it
- Contractors
- 520 Parent companies with an obligation
- Largest contractor
- HDT Expeditionary Systems Inc. $10.7 million, 9.4% of obligations
- Data as of
Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)
Full ranking
| Rank | Contractor | Net obligations | Share | Trend |
|---|---|---|---|---|
| 1 | $10,679,500 | |||
| 2 |
S & K Aerospace, LLC
Top agencies
|
$7,737,896 | ||
| 3 | $4,756,649 | |||
| 4 | $3,685,690 | |||
| 5 | $3,487,521 | |||
| 6 | $3,434,902 | |||
| 7 |
W S Darley & Co
Top agencies
|
$3,296,480 | ||
| 8 |
Evac North America Inc
Top agencies
|
$3,260,525 | ||
| 9 |
Windward Enterprises, LLC
Top agencies
|
$2,953,151 | ||
| 10 |
ECI Defense Group, Inc.
Top agencies
|
$2,936,001 | ||
| 11 |
Analytic Services Inc.
Top agencies
|
$2,821,246 | ||
| 12 | $2,416,563 | |||
| 13 |
S I T Corporation
Top agencies
|
$2,411,804 | ||
| 14 |
Heico Corp
Top agencies
|
$2,357,685 | ||
| 15 | $1,747,823 | |||
| 16 |
MCO Solutions, Inc.
Top agencies
|
$1,667,572 | ||
| 17 |
Kampi Components Co Inc.
Top agencies
|
$1,641,689 | ||
| 18 | $1,591,851 | |||
| 19 | $1,196,035 | |||
| 20 | $1,100,000 | |||
| 21 |
Alphapointe
Top agencies
|
$1,038,871 | ||
| 22 |
Veterans Aerospace LLC
Top agencies
|
$954,120 | ||
| 23 |
Vantex Service Corporation
Top agencies
|
$915,290 | ||
| 24 |
DLA Aerospace LLC
Top agencies
|
$761,664 | ||
| 25 | $759,760 | |||
| 26 | $693,435 | |||
| 27 |
Jgils, LLC
Top agencies
|
$657,752 | ||
| 28 | $654,300 | |||
| 29 | $651,490 | |||
| 30 |
FBC Enterprises LLC
Top agencies
|
$629,639 | ||
| 31 | $626,862 | |||
| 32 | $625,759 | |||
| 33 | $602,224 | |||
| 34 | $580,000 | |||
| 35 |
Auburn Mechanical, Inc.
Top agencies
|
$538,900 | ||
| 36 |
Seemann Composites, LLC
Top agencies
|
$515,006 | ||
| 37 |
R P M Supply Corporation
Top agencies
|
$508,501 | ||
| 38 | $504,095 | |||
| 39 | $501,142 | |||
| 40 |
Blue Group LLC
Top agencies
|
$482,930 | ||
| 41 | $465,810 | |||
| 42 |
T-L Irrigation Co.
Top agencies
|
$465,033 | ||
| 43 | $449,860 | |||
| 44 | $449,505 | |||
| 45 | $444,389 | |||
| 46 | $435,736 | |||
| 47 | $431,471 | |||
| 48 |
Samit LLC
Top agencies
|
$403,117 | ||
| 49 | $391,365 | |||
| 50 | $385,510 | |||
| 51 |
Bestweld Inc.
Top agencies
|
$381,637 | ||
| 52 |
Cepeda Associates, Inc.
Top agencies
|
$380,066 | ||
| 53 |
Agape Encounters, LLC
Top agencies
|
$372,664 | ||
| 54 |
RTX Corporation
Top agencies
|
$370,000 | ||
| 55 | $369,938 | |||
| 56 | $329,769 | |||
| 57 | $324,466 | |||
| 58 | $311,452 | |||
| 59 | $300,312 | |||
| 60 |
BIO Response Solutions Inc
Top agencies
|
$288,332 | ||
| 61 | $274,647 | |||
| 62 |
ETP Procurement LLC
Top agencies
|
$274,140 | ||
| 63 |
Radice Enterprises, LLC
Top agencies
|
$260,000 | ||
| 64 |
J.G.B. Enterprises Inc.
Top agencies
|
$256,217 | ||
| 65 |
Phoenix Trading Inc.
Top agencies
|
$252,920 | ||
| 66 |
Douglas Food Stores Inc.
Top agencies
|
$242,506 | ||
| 67 | $237,949 | |||
| 68 |
Atlas Supply Company, Inc.
Top agencies
|
$233,588 | ||
| 69 | $227,588 | |||
| 70 |
Federal Contracts LLC
Top agencies
|
$218,520 | ||
| 71 |
Westsim Engineering, Inc.
Top agencies
|
$217,935 | ||
| 72 |
Lewis-Smith Corporation
Top agencies
|
$217,500 | ||
| 73 | $216,400 | |||
| 74 | $213,880 | |||
| 75 | $211,768 | |||
| 76 |
Independent Hardware Inc.
Top agencies
|
$211,065 | ||
| 77 | $202,923 | |||
| 78 | $202,345 | |||
| 79 | $200,766 | |||
| 80 | $198,675 | |||
| 81 |
Kijero, LLC
Top agencies
|
$190,300 | ||
| 82 |
WB Waste Solutions, LLC
Top agencies
|
$182,392 | ||
| 83 | $180,890 | |||
| 84 | $179,707 | |||
| 85 | $179,617 | |||
| 86 |
Steel LLC
Top agencies
|
$176,504 | ||
| 87 |
Viking Incorporated
Top agencies
|
$171,808 | ||
| 88 |
2Lyons Aerospace LLC
Top agencies
|
$166,898 | ||
| 89 | $163,772 | |||
| 90 |
TNL Sales LLC
Top agencies
|
$163,552 | ||
| 91 |
Cosmex TECH LLC
Top agencies
|
$159,800 | ||
| 92 |
Gasparini John W Inc.
Top agencies
|
$159,068 | ||
| 93 |
Monmouth Solutions, Inc.
Top agencies
|
$158,618 | ||
| 94 | $156,650 | |||
| 95 |
TECH Nexuses, Inc.
Top agencies
|
$155,050 | ||
| 96 |
Govparts LLC
Top agencies
|
$154,546 | ||
| 97 | $150,602 | |||
| 98 | $149,172 | |||
| 99 |
Frawner Corporation
Top agencies
|
$145,000 | ||
| 100 | $143,941 |
Show 75 more
100 of 520 contractors listed here. See the rest on GovTribe.
Rankings for the codes under PSC 45
| Code | Net obligations | Largest contractor |
|---|---|---|
| 4520 Space and Water Heating Equipment | $49,982,077 | HDT Expeditionary Systems Inc. |
| 4510 Plumbing Fixtures and Accessories | $36,543,127 | S & K Aerospace, LLC |
| 4540 Waste Disposal Equipment | $16,306,919 | Flightfab, Inc. |
| 4530 Fuel Burning Equipment Units | $3,810,813 | Mckenzie Construction & Site Development LLC |
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 $113 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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 Aug 2024–Jul 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 45 contractors in Aug 2025–Jul 2026?
1. HDT Expeditionary Systems Inc. ($10.7M), 2. S & K Aerospace, LLC ($7.74M), 3. Flightfab, Inc. ($4.76M), 4. Atlantic Diving Supply, Inc. ($3.69M), 5. Lockheed Martin Corporation ($3.49M), 6. Argo Turboserve Corporation ($3.43M), 7. W S Darley & Co ($3.3M), 8. Evac North America Inc ($3.26M), 9. Windward Enterprises, LLC ($2.95M), 10. ECI Defense Group, Inc. ($2.94M).
On GovTribe
Research every contractor on this list
- Every contract, task order and IDV they hold
- Their subsidiaries, teammates and competitors
- Open opportunities they're positioned for
- Alerts when they win new work