Top 96 Contractors in PSC N045: Installation of Equipment: Plumbing, Heating, and Waste Disposal Equipment, FY2025

Name: Top 96 Contractors in PSC N045: Installation of Equipment: Plumbing, Heating, and Waste Disposal Equipment, FY2025
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 75% of FY2025 PSC N045 contract dollars

Contract obligations: $111,814,570 Net of deobligations, by contracts coded PSC N045
Contractors: 101 Parent companies with an obligation
Largest contractor: MLU Services, LLC $73.7 million, 44.9% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 96 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	MLU Services, LLC Top agencies DHS (Department of Homeland Security)	$73,659,424	44.9%	Rank history: #5 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Guidehouse Inc. Through Aptim Federal Services, LLC Top agencies DHS (Department of Homeland Security)	$20,638,000	12.6%	Rank history: not on the FY2021–FY2024 lists; new.
3	T.C.I. Construction & Management Co. Inc. Top agencies VA (Department of Veterans Affairs)	$7,894,000	4.8%	Rank history: not on the FY2021–FY2024 lists; new.
4	Skytek LLC Top agencies VA (Department of Veterans Affairs)	$5,434,406	3.3%	Rank history: not on the FY2021–FY2024 lists; new.
5	Disaster Solutions Alliance, LLC Top agencies DHS (Department of Homeland Security)	$4,672,649	2.8%	Rank history: #4 in FY2021, #2 in FY2022, #3 in FY2023 and not on the FY2024 list; returned.
6	Enfield Enterprises LLC Top agencies DOT (Department of Transportation)	$4,493,395	2.7%	Rank history: not on the FY2021–FY2024 lists; new.
7	CMP Commercial Construction Inc Top agencies DOT (Department of Transportation)	$2,416,017	1.5%	Rank history: not on the FY2021–FY2023 lists and #6 in FY2024; down 1 since FY2024.
8	Ahtna Infrastructure & Technologies LLC Top agencies DOT (Department of Transportation)	$1,375,545	0.8%	Rank history: not on the FY2021–FY2024 lists; new.
9	Nodak Electric & Construction, Inc. Top agencies DOI (Department of the Interior) USAF (Department of the Air Force)	$1,017,295	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
10	Argus CJW JV 3 LLC Top agencies Navy (Department of the Navy)	$1,015,937	0.6%	Rank history: not on the FY2021 list, #19 in FY2022, #8 in FY2023 and not on the FY2024 list; returned.
11	Sh Mechanical Inc. Top agencies USAF (Department of the Air Force)	$951,142	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
12	Results Sales & Service, L.L.C. Top agencies VA (Department of Veterans Affairs)	$863,910	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
13	Hamilton Pacific Chamberlain LLC Top agencies VA (Department of Veterans Affairs)	$812,243	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
14	Tj&B Air Conditioning and Electric, LLC Top agencies DOT (Department of Transportation)	$493,968	0.3%	Rank history: not on the FY2021 list, #34 in FY2022, #9 in FY2023 and #2 in FY2024; down 12 since FY2024.
15	Mule Engineering, Inc. Top agencies VA (Department of Veterans Affairs)	$467,855	0.3%	Rank history: not on the FY2021 list, #7 in FY2022 and not on the FY2023–FY2024 lists; returned.
16	Avcor Construction LLC Top agencies DOT (Department of Transportation)	$423,903	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
17	Arktic Temp of Mississippi, LLC Top agencies USDA (Department of Agriculture)	$417,307	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
18	Aktarius LLC Top agencies Navy (Department of the Navy)	$403,923	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
19	JNB Services LLC Top agencies DOT (Department of Transportation)	$384,000	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
20	Puyenpa Technologies LLC Through Puyenpa Construction, LLC Top agencies Navy (Department of the Navy)	$352,048	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
21	National Native American Construction, Inc. Top agencies USDA (Department of Agriculture)	$302,810	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
22	Happel & Associates Inc. Top agencies DOT (Department of Transportation)	$279,632	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
23	Rashad AC and Heating LLC Top agencies USAF (Department of the Air Force)	$239,672	0.1%	Rank history: not on the FY2021–FY2023 lists and #41 in FY2024; up 18 since FY2024.
24	Sterileco LLC Top agencies DOI (Department of the Interior) USAF (Department of the Air Force)	$217,597	0.1%	Rank history: not on the FY2021–FY2023 lists and #21 in FY2024; down 3 since FY2024.
25	Utility Systems Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$193,548	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
26	Advantage Mechanical LLC Top agencies VA (Department of Veterans Affairs)	$169,853	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
27	Ama Diversified Construction Group Top agencies DOI (Department of the Interior)	$166,556	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
28	Austability PTY Ltd Top agencies DOS (Department of State)	$146,790	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
29	Manhattan Electric LLC Top agencies DOT (Department of Transportation)	$130,610	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
30	Xenturis LLC Top agencies VA (Department of Veterans Affairs)	$110,500	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
31	Midland Mechanical Inc. Top agencies HHS (Department of Health and Human Services)	$103,510	0.1%	Rank history: #11 in FY2021, #51 in FY2022 and not on the FY2023–FY2024 lists; returned.
32	Timberline Construction Group, LLC Top agencies DHS (Department of Homeland Security)	$97,061	0.1%	Rank history: not on the FY2021 list, #8 in FY2022, not on the FY2023 list and #4 in FY2024; down 28 since FY2024.
33	Mark Zimmer Top agencies DOT (Department of Transportation)	$94,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
34	Arctic Slope Regional Corporation Through Asrc Prime Constructors, LLC Top agencies Army (Department of the Army)	$93,755	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
35	ALJ Heating & Cooling LLC Top agencies USAF (Department of the Air Force)	$84,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
36	B2 Constructors, LLC Top agencies VA (Department of Veterans Affairs)	$74,337	<0.1%	Rank history: not on the FY2021 list, #10 in FY2022 and not on the FY2023–FY2024 lists; returned.
37	Souza Construction, Inc. Top agencies USDA (Department of Agriculture)	$67,478	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
38	Disabled Veterans Construction Inc. Top agencies USDA (Department of Agriculture)	$65,655	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
39	Tri-County Plumbing Contractors, Inc. Top agencies DHS (Department of Homeland Security)	$58,380	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
40	Infiniti Scope LLC Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$57,050	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
41	W M B, Inc. Top agencies USDA (Department of Agriculture)	$50,829	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
42	Therma Holdings LLC Through Yearout Mechanical, LLC / Dba: Welch's Boiler Service, LLC Top agencies DOI (Department of the Interior)	$50,362	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
43	Ameritech Contracting LLC Top agencies DOI (Department of the Interior)	$50,274	<0.1%	Rank history: not on the FY2021–FY2023 lists and #5 in FY2024; down 38 since FY2024.
44	R.l. Hueston, LLC Top agencies DOI (Department of the Interior)	$45,371	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
45	Magnolia Plumbing, Inc. Top agencies DOI (Department of the Interior)	$43,507	<0.1%	Rank history: not on the FY2021 list, #62 in FY2022, #38 in FY2023 and #94 in FY2024; up 49 since FY2024.
46	Caliber Mechanical LLC Top agencies DOI (Department of the Interior)	$42,602	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
47	Emcor Group Inc. Through CCI Mechanical Inc. Top agencies DOI (Department of the Interior)	$38,144	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
48	FM International Inc. Top agencies Army (Department of the Army)	$36,391	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
49	Alpha Moon Rising Inc. Top agencies USAF (Department of the Air Force)	$34,850	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
50	Redhammer General Construction LLC Top agencies DHS (Department of Homeland Security)	$33,741	<0.1%	Rank history: #68 in FY2021 and not on the FY2022–FY2024 lists; returned.
51	Sippel Company LLC Top agencies DHS (Department of Homeland Security)	$33,700	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
52	Clima-Tech Corporation Top agencies VA (Department of Veterans Affairs)	$32,970	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
53	Total Mechanical Services Inc. Top agencies DOT (Department of Transportation)	$32,327	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
54	KB Standard LLC Top agencies VA (Department of Veterans Affairs)	$31,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
55	Dunbar Mechanical Contractors, LLC Top agencies VA (Department of Veterans Affairs)	$29,703	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
56	Buckeye Elm Contracting LLC Top agencies USAF (Department of the Air Force)	$28,603	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
57	Alaskan Drilling, LLC Top agencies USAF (Department of the Air Force)	$27,869	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
58	JJ Contracting Corp Top agencies USAF (Department of the Air Force)	$27,200	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
59	Agape Encounters, LLC Top agencies DOI (Department of the Interior)	$25,740	<0.1%	Rank history: #84 in FY2021, #81 in FY2022 and not on the FY2023–FY2024 lists; returned.
60	Acumen Enterprises Inc. Top agencies DOT (Department of Transportation)	$25,268	<0.1%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2024; down 35 since FY2024.
61	Northern Purchase Services, LLC Top agencies USDA (Department of Agriculture)	$24,762	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
62	Nicolet Shores Plumbing Inc. Top agencies DHS (Department of Homeland Security)	$24,500	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
63	Patriot Diversified, LLC Top agencies DHS (Department of Homeland Security)	$23,489	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
64	Maccarone Plumbing Inc. Top agencies DOT (Department of Transportation)	$22,500	<0.1%	Rank history: #100 in FY2021 and not on the FY2022–FY2024 lists; returned.
65	Arabic Interpreters LLC Top agencies DOI (Department of the Interior)	$20,950	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
66	Del SUR Services, Inc. Top agencies Commerce (Department of Commerce)	$19,828	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
67	Sturm Heating & Air Conditioning, LLC Top agencies DOT (Department of Transportation)	$18,928	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
68	OST Services, LLC Top agencies VA (Department of Veterans Affairs)	$17,885	<0.1%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2024; down 31 since FY2024.
69	Mccray Group Ventures LLC Top agencies USDA (Department of Agriculture)	$17,727	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
70	Xeless Construction Top agencies DOS (Department of State)	$17,224	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
71	Trove 360 LLC Top agencies DHS (Department of Homeland Security)	$16,500	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
72	Delval Equipment Corporation Top agencies DOJ (Department of Justice)	$16,494	<0.1%	Rank history: #70 in FY2021, #76 in FY2022 and not on the FY2023–FY2024 lists; returned.
73	Utility Service Co., Inc. Top agencies DOI (Department of the Interior)	$15,953	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
74	Micah Property Management, LLC Top agencies DHS (Department of Homeland Security)	$15,450	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
75	David Raposa Top agencies Commerce (Department of Commerce)	$15,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
76	Peak Solutions Ltd. Top agencies DHA (Defense Health Agency)	$14,553	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
77	Amalgamated Services Inc. Top agencies DOT (Department of Transportation)	$13,471	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
78	Mayointhemix LLC Top agencies USDA (Department of Agriculture)	$13,167	<0.1%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2024; down 36 since FY2024.
79	DSI Inc. Top agencies Smithsonian (Smithsonian Institution)	$11,351	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
80	Choice Sheetmetal LLC Top agencies DHS (Department of Homeland Security)	$11,300	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
81	Dunns Heating & Cooling LLC Top agencies DOI (Department of the Interior)	$10,950	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
82	Medved Global Inc Top agencies USDA (Department of Agriculture)	$10,253	<0.1%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2024; up 6 since FY2024.
83	Bighorn Ridgerunners, LLC Top agencies HHS (Department of Health and Human Services)	$10,093	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
84	Justice, Inc. Top agencies USDA (Department of Agriculture)	$9,850	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
85	Kunj Construction Corporation Top agencies Navy (Department of the Navy)	$8,973	<0.1%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2023 and #33 in FY2024; down 52 since FY2024.
86	Altrol, Inc. Top agencies DOI (Department of the Interior)	$7,474	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
87	Rim Country Mechanical Inc. Top agencies USDA (Department of Agriculture)	$7,091	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
88	Straits Heating & Cooling, Inc. Top agencies DHS (Department of Homeland Security)	$6,887	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
89	Thermal Air, LLC Top agencies DOI (Department of the Interior)	$5,820	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
90	Millennium Park Plaza Associates S EN C. POR a. S.E. Top agencies DOJ (Department of Justice)	$4,237	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
91	Crowson Paint Contractors, Inc. Top agencies USAF (Department of the Air Force)	$3,600	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
92	Builder Properties Development Enterprise, LLC Top agencies USAF (Department of the Air Force)	$3,300	<0.1%	Rank history: not on the FY2021–FY2023 lists and #43 in FY2024; down 49 since FY2024.
93	Elite Mechanical Services LLC Top agencies DOI (Department of the Interior)	$3,225	<0.1%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; down 66 since FY2024.
94	M & M Electric Inc. Top agencies Navy (Department of the Navy)	$3,100	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
95	JVS Construction, Inc. Top agencies Navy (Department of the Navy)	$1,961	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
96	Katayama Shoji Inc. Top agencies USAF (Department of the Air Force)	$1,715	<0.1%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2024; up 1 since FY2024.

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96 of 101 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 $164 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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

Who were the top 10 PSC N045 contractors in FY2025?

1. MLU Services, LLC ($73.7M), 2. Guidehouse Inc. ($20.6M), 3. T.C.I. Construction & Management Co. Inc. ($7.89M), 4. Skytek LLC ($5.43M), 5. Disaster Solutions Alliance, LLC ($4.67M), 6. Enfield Enterprises LLC ($4.49M), 7. CMP Commercial Construction Inc ($2.42M), 8. Ahtna Infrastructure & Technologies LLC ($1.38M), 9. Nodak Electric & Construction, Inc. ($1.02M), 10. Argus CJW JV 3 LLC ($1.02M).

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