Top 100 Contractors in PSC N041: Installation of Equipment: Refrigeration, Air Conditioning, and Air Circulating Equipment, FY2021

Name: Top 100 Contractors in PSC N041: Installation of Equipment: Refrigeration, Air Conditioning, and Air Circulating Equipment, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 54% of FY2021 PSC N041 contract dollars

Contract obligations: $21,101,657 Net of deobligations, by contracts coded PSC N041
Contractors: 148 Parent companies with an obligation
Largest contractor: Clayarch Inc. $3.79 million, 17.5% 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	Clayarch Inc. Top agencies Navy (Department of the Navy)	$3,785,402	17.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
2	Mechanical Construction Managers, LLC Top agencies USAF (Department of the Air Force)	$1,473,049	6.8%	Rank history: not on the FY2022 list, #25 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
3	Damuth Services Inc. Top agencies NASA (National Aeronautics and Space Administration)	$1,185,750	5.5%	Rank history: #9 in FY2022, #2 in FY2023, #11 in FY2024 and not on the FY2025 list; up 16 since FY2020.
4	OCS Construction Services Inc. Top agencies Navy (Department of the Navy)	$1,051,682	4.9%	Rank history: #22 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
5	Golden Lines Contracting Company Top agencies Navy (Department of the Navy)	$930,666	4.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
6	Acierto LLC Top agencies VA (Department of Veterans Affairs)	$898,900	4.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
7	Accentz, Inc. Top agencies Army (Department of the Army)	$819,403	3.8%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
8	Kekolu Contracting LLC Top agencies USAF (Department of the Air Force)	$654,904	3.0%	Rank history: not on the FY2022 list, #15 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
9	Acro Construction, LLC Top agencies DOT (Department of Transportation) HHS (Department of Health and Human Services)	$436,058	2.0%	Rank history: #77 in FY2022, #18 in FY2023, #81 in FY2024 and #97 in FY2025; up 52 since FY2020.
10	Black Construction / Mace International Joint Venture Top agencies Navy (Department of the Navy)	$396,150	1.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
11	Mesa Laboratories Inc. Top agencies HHS (Department of Health and Human Services)	$369,381	1.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
12	R & M Government Services Inc. Top agencies VA (Department of Veterans Affairs)	$354,760	1.6%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
13	Enviro-Tab Inc. Top agencies Army (Department of the Army)	$317,509	1.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
14	Marcia K Beckwith Inc. Top agencies USAF (Department of the Air Force)	$299,600	1.4%	Rank history: #89 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
15	Abniyah-Aldiriyah EST Top agencies USAF (Department of the Air Force)	$290,384	1.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
16	Reagent World, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$283,860	1.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
17	Tj&B Air Conditioning and Electric, LLC Top agencies DOT (Department of Transportation)	$281,955	1.3%	Rank history: #11 in FY2022, #30 in FY2023, #14 in FY2024 and #19 in FY2025; up 24 since FY2020.
18	FM International Inc. Top agencies DOT (Department of Transportation)	$253,391	1.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
19	Noresco LLC 2 awardees, including Carrier Rental Systems Inc. and Carrier Corporation Top agencies USAF (Department of the Air Force)	$231,856	1.1%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
20	N2Ec Aircon and Heating Corporation Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$230,800	1.1%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; up 11 since FY2020.
21	Al Muamroon Trading Top agencies USAF (Department of the Air Force)	$226,832	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
22	Walter Thomas & Associates, Incorporated Top agencies VA (Department of Veterans Affairs)	$209,000	1.0%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
23	Ramast Bouw Top agencies Army (Department of the Army)	$198,318	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
24	Restaurant Equipment Service Group LLC Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$194,280	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
25	Mortech Manufacturing Co Inc. Top agencies VA (Department of Veterans Affairs)	$157,955	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	Ground Level Services LLC Top agencies DOT (Department of Transportation)	$155,520	0.7%	Rank history: #65 in FY2022, #75 in FY2023, #52 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
27	Native Star Group, Inc. Top agencies USAF (Department of the Air Force)	$155,239	0.7%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
28	Coastal ECO Construction,Inc. Top agencies DOI (Department of the Interior)	$147,777	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	Emtech, LLC Top agencies USDA (Department of Agriculture)	$145,000	0.7%	Rank history: #87 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
30	W. W. Williams Company LLC the Through The W.w. Williams Company, LLC Top agencies Navy (Department of the Navy)	$133,262	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	Jorge Castillo Top agencies USDA (Department of Agriculture) DOT (Department of Transportation)	$132,131	0.6%	Rank history: not on the FY2022–FY2025 lists; down 29 since FY2020.
32	Boland Trane Services Inc. Top agencies VA (Department of Veterans Affairs)	$132,040	0.6%	Rank history: #28 in FY2022 and not on the FY2023–FY2025 lists; up 40 since FY2020.
33	Ajce Corporation Top agencies DHS (Department of Homeland Security)	$119,735	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
34	Advanced Logistic Partners Inc. Top agencies Army (Department of the Army)	$119,250	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
35	Blasco Construction Corp Top agencies DOT (Department of Transportation)	$118,322	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	Pacific Source Electric LLC Top agencies USAF (Department of the Air Force)	$113,238	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Federal Builders LLC Top agencies DHS (Department of Homeland Security)	$112,272	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
38	Power Mechanical Inc. Top agencies DOI (Department of the Interior)	$110,977	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
39	Calvert Controls, Inc. Top agencies Navy (Department of the Navy)	$109,886	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
40	Foresight Construction Group, Inc. Top agencies USAF (Department of the Air Force)	$107,650	0.5%	Rank history: not on the FY2022 list, #61 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
41	Dunbar Mechanical Contractors, LLC Top agencies VA (Department of Veterans Affairs)	$101,373	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Multistack LLC Top agencies DOS (Department of State)	$101,205	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Misr Refrigeration and Air Conditioning Manufacturing Company Sae Top agencies USAID (US Agency for International Development)	$95,000	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	Williamsville Resources II, Inc. Top agencies DOI (Department of the Interior)	$92,500	0.4%	Rank history: not on the FY2022 list, #27 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
45	RTH Mechanical Contractors Inc. Top agencies VA (Department of Veterans Affairs)	$89,800	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
46	Oneill Contractors Inc. Top agencies DOT (Department of Transportation)	$86,265	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Clima-Trade D.O.O. Sarajevo Top agencies DOS (Department of State)	$82,398	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Coleman Mechanical Services, Inc. Top agencies DOJ (Department of Justice)	$74,825	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Simple Air Solutions LLC Top agencies DLA (Defense Logistics Agency)	$68,474	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	Eastern Carolina Vocational Center Inc. Top agencies Navy (Department of the Navy)	$66,056	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	Consolidated Installation Support, LLC Top agencies VA (Department of Veterans Affairs)	$64,758	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	EMCOR Group, Inc. Through CCI Mechanical Inc. Top agencies USAF (Department of the Air Force)	$64,295	0.3%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
53	Garrett ROY C Inc. Top agencies USAF (Department of the Air Force)	$64,050	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	B & B Salas Mechanical LLC Top agencies USAF (Department of the Air Force)	$62,500	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	Razor Consulting Solutions, Inc. Top agencies USAF (Department of the Air Force)	$61,341	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	Dct, Incorporated Top agencies HHS (Department of Health and Human Services)	$60,031	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
57	Nippon Bldg.care Limited Top agencies DOS (Department of State)	$60,028	0.3%	Rank history: not on the FY2022–FY2024 lists and #54 in FY2025; new, not ranked in FY2020.
58	Anna Lisa Luna Construction, Inc. Top agencies USDA (Department of Agriculture)	$55,870	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Viessmann Middle East FZE Top agencies DOS (Department of State)	$55,137	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	Laroc Refrigeration-Metal Division, Inc. Top agencies DOI (Department of the Interior)	$51,479	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Affordable Service Solutions, LLC Top agencies Army (Department of the Army)	$50,000	0.2%	Rank history: not on the FY2022 list, #39 in FY2023, #70 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
62	Sefri SA De CV Top agencies DOS (Department of State)	$49,624	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	AR6 Construction & Engineering, LLC Top agencies USAF (Department of the Air Force)	$47,915	0.2%	Rank history: not on the FY2022–FY2025 lists; down 59 since FY2020.
64	Hogger Enterprises LLC Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$46,480	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Total Comfort Corporation Top agencies Army (Department of the Army)	$43,868	0.2%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; down 18 since FY2020.
66	D Nine Solution Engineering Company Limited Top agencies DOS (Department of State)	$41,640	0.2%	Rank history: not on the FY2022–FY2025 lists; up 57 since FY2020.
67	NGP V Oklahoma LLC Top agencies DOJ (Department of Justice)	$41,211	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	F.m. Thomas Air Conditioning, Inc. Top agencies Navy (Department of the Navy)	$39,487	0.2%	Rank history: not on the FY2022–FY2025 lists; down 39 since FY2020.
69	Fillmore Contracts, LLC Top agencies HHS (Department of Health and Human Services)	$37,390	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Scalfo Electric Inc. Top agencies DOT (Department of Transportation)	$35,709	0.2%	Rank history: not on the FY2022–FY2025 lists; down 56 since FY2020.
71	Life Safety Services LLC Top agencies HHS (Department of Health and Human Services)	$35,084	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	Hays Service, LLC De Top agencies USAF (Department of the Air Force)	$34,340	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Msab, LLC Top agencies DOI (Department of the Interior)	$34,294	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Silver Wolf Enterprises Corp Top agencies DOI (Department of the Interior)	$33,395	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Matrix HG, Inc. Top agencies EPA (Environmental Protection Agency)	$33,170	0.2%	Rank history: not on the FY2022–FY2025 lists; up 78 since FY2020.
76	HL Gebaeudetechnik GMBH Top agencies DOS (Department of State)	$32,149	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Total Environmental Management, Inc. Top agencies DOI (Department of the Interior)	$32,000	0.1%	Rank history: #70 in FY2022 and not on the FY2023–FY2025 lists; up 9 since FY2020.
78	Cuartos Frios Y Aislamientos Termicos De Honduras S De RL De CV Top agencies DOS (Department of State)	$31,262	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Johnson Controls Security Solutions LLC 5 awardees, including Johnson Controls Inc. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$29,389	0.1%	Rank history: #33 in FY2022, #83 in FY2023 and not on the FY2024–FY2025 lists; down 46 since FY2020.
80	SNO Valley Process Solutions Inc. Top agencies Army (Department of the Army)	$28,942	0.1%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; up 10 since FY2020.
81	Cherokee Nation Environmental Solutions, L.L.C. Top agencies USAF (Department of the Air Force)	$27,888	0.1%	Rank history: not on the FY2022–FY2025 lists; down 78 since FY2020.
82	Energy By Native American Design Corp Top agencies DOI (Department of the Interior)	$26,500	0.1%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
83	Johnson Controls (MAURITIUS) Private Limited Top agencies DOS (Department of State)	$26,184	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Air Control Technologies, Inc. Top agencies VA (Department of Veterans Affairs)	$24,970	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	Radice Enterprises, LLC Top agencies DOI (Department of the Interior)	$24,255	0.1%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
86	Vet First Constructors, LLC Top agencies DOT (Department of Transportation)	$24,155	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Arrowhead Global LLC Top agencies DHS (Department of Homeland Security)	$23,840	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Rios, Deidre Top agencies DOI (Department of the Interior)	$23,736	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Calvin Electric LLC Top agencies USAF (Department of the Air Force)	$23,560	0.1%	Rank history: not on the FY2022–FY2024 lists and #24 in FY2025; new, not ranked in FY2020.
90	Native American Pride Constructors, LLC Top agencies VA (Department of Veterans Affairs)	$23,315	0.1%	Rank history: not on the FY2022–FY2025 lists; down 34 since FY2020.
91	Multi Air Services Engineers, Corp Top agencies DOJ (Department of Justice) Army (Department of the Army)	$23,248	0.1%	Rank history: not on the FY2022–FY2025 lists; down 39 since FY2020.
92	Firelake Construction Inc. Top agencies DOT (Department of Transportation)	$22,199	0.1%	Rank history: not on the FY2022–FY2025 lists; down 65 since FY2020.
93	Disabled Veterans Construction Inc. Top agencies VA (Department of Veterans Affairs)	$21,386	0.1%	Rank history: not on the FY2022–FY2024 lists and #76 in FY2025; new, not ranked in FY2020.
94	The Jardine Engineering Corporation. Limited Top agencies DOS (Department of State)	$20,597	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Smart Enterprises Inc. Top agencies VA (Department of Veterans Affairs)	$19,947	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	Well Built Homes, Inc. Top agencies USDA (Department of Agriculture)	$19,300	0.1%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
97	PH FBI SD LLC Top agencies DOJ (Department of Justice)	$19,016	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	M & W Industries, Inc. Top agencies DOI (Department of the Interior)	$18,650	0.1%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; up 51 since FY2020.
99	Nodak Electric & Construction, Inc. Top agencies USAF (Department of the Air Force)	$18,450	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	JX Holdings Inc. Through Nippo Corporation Top agencies DTRA (Defense Threat Reduction Agency)	$17,607	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 148 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 $21.6 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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 N041 contractors in FY2021?

1. Clayarch Inc. ($3.79M), 2. Mechanical Construction Managers, LLC ($1.47M), 3. Damuth Services Inc. ($1.19M), 4. OCS Construction Services Inc. ($1.05M), 5. Golden Lines Contracting Company ($931K), 6. Acierto LLC ($899K), 7. Accentz, Inc. ($819K), 8. Kekolu Contracting LLC ($655K), 9. Acro Construction, LLC ($436K), 10. Black Construction / Mace International Joint Venture ($396K).

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