Top 100 Contractors in PSC Z2NB: Repair or Alteration of Heating and Cooling Plants, FY2021

Name: Top 100 Contractors in PSC Z2NB: Repair or Alteration of Heating and Cooling Plants, FY2021
Creator: GovTribe

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

The top 10 won 61% of FY2021 PSC Z2NB contract dollars

Contract obligations: $45,496,502 Net of deobligations, by contracts coded PSC Z2NB
Contractors: 105 Parent companies with an obligation
Largest contractor: Gulf Pacific Contracting LLC $6.33 million, 13.8% 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	Gulf Pacific Contracting LLC Top agencies USAF (Department of the Air Force)	$6,329,000	13.8%	Rank history: #17 in FY2022, #18 in FY2023, #9 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
2	GFS Crcc JV LLC Top agencies VA (Department of Veterans Affairs)	$4,999,936	10.9%	Rank history: #26 in FY2022, #34 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
3	Dawson Enterprises, Inc. Top agencies HHS (Department of Health and Human Services)	$4,017,906	8.8%	Rank history: #3 in FY2022, #3 in FY2023, #4 in FY2024 and not on the FY2025 list; down 1 since FY2020.
4	Kelly Construction Services Inc. Top agencies Navy (Department of the Navy)	$3,738,262	8.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
5	Tom Hammonds Enterprises, LLC Top agencies USAF (Department of the Air Force)	$2,235,294	4.9%	Rank history: #67 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
6	Boonerang Consulting LLC Top agencies HHS (Department of Health and Human Services)	$1,617,031	3.5%	Rank history: #72 in FY2022, #14 in FY2023, #15 in FY2024 and not on the FY2025 list; up 51 since FY2020.
7	The C.d. Whitfield Co., LLC Top agencies DLA (Defense Logistics Agency)	$1,425,922	3.1%	Rank history: #55 in FY2022, #48 in FY2023, #51 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
8	Saw Contracting, Inc. Top agencies VA (Department of Veterans Affairs)	$1,371,170	3.0%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
9	Achuti LLC Top agencies Army (Department of the Army)	$1,116,280	2.4%	Rank history: #22 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
10	Skookum Educational Programs Top agencies Navy (Department of the Navy)	$1,078,247	2.4%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
11	Sjv2 Top agencies USAF (Department of the Air Force)	$993,701	2.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
12	Practical Energy Partner, LLC Top agencies DOI (Department of the Interior)	$985,018	2.1%	Rank history: #48 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
13	Jackson Contractor Group Inc. Top agencies HHS (Department of Health and Human Services)	$963,697	2.1%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; up 20 since FY2020.
14	Lord & Son Construction, Inc. Top agencies USAF (Department of the Air Force)	$879,584	1.9%	Rank history: #47 in FY2022, #16 in FY2023, not on the FY2024 list and #32 in FY2025; down 9 since FY2020.
15	Enfield Enterprises LLC Top agencies Navy (Department of the Navy)	$804,000	1.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
16	Capital Brand Group LLC Top agencies USDA (Department of Agriculture)	$792,900	1.7%	Rank history: #29 in FY2022, not on the FY2023–FY2024 lists and #56 in FY2025; new, not ranked in FY2020.
17	J & B Builders Inc. Top agencies USDA (Department of Agriculture)	$646,603	1.4%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
18	J & J Maintenance Inc. Top agencies USAF (Department of the Air Force)	$553,575	1.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
19	RJS Construction Inc. Top agencies Navy (Department of the Navy)	$535,803	1.2%	Rank history: #52 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
20	Delval Equipment Corporation Top agencies DOT (Department of Transportation)	$525,000	1.1%	Rank history: not on the FY2022 list, #53 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
21	Industrial Engineering Co Inc. Top agencies USDA (Department of Agriculture)	$498,800	1.1%	Rank history: #60 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
22	CCI Group LLC 2 awardees Top agencies DOI (Department of the Interior)	$485,633	1.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
23	Souza Construction, Inc. Top agencies Navy (Department of the Navy)	$479,900	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
24	Accord Federal Services, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$459,489	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
25	GCJ Inc. Top agencies USAF (Department of the Air Force)	$407,998	0.9%	Rank history: not on the FY2022–FY2025 lists; down 17 since FY2020.
26	Sori E&C Co.,Ltd Top agencies Army (Department of the Army)	$396,439	0.9%	Rank history: #9 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
27	Floyd Construction Corp Top agencies DOI (Department of the Interior)	$390,777	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	Public Works Contractor Inc. Top agencies Navy (Department of the Navy)	$386,101	0.8%	Rank history: #36 in FY2022, not on the FY2023 list, #45 in FY2024 and not on the FY2025 list; down 27 since FY2020.
29	GSI Construction Corporation, Inc. Top agencies USAF (Department of the Air Force)	$373,500	0.8%	Rank history: not on the FY2022 list, #35 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
30	Utility Systems Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$371,246	0.8%	Rank history: #73 in FY2022, not on the FY2023–FY2024 lists and #42 in FY2025; new, not ranked in FY2020.
31	Outside the Box LLC Top agencies Army (Department of the Army)	$331,203	0.7%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.
32	MDM Construction Supply, LLC Top agencies Army (Department of the Army)	$275,884	0.6%	Rank history: not on the FY2022–FY2025 lists; up 14 since FY2020.
33	Connecticut Boiler Repair and Manufacturing Co., Incorporated Top agencies Navy (Department of the Navy)	$263,057	0.6%	Rank history: #16 in FY2022, #19 in FY2023, #26 in FY2024 and #37 in FY2025; down 4 since FY2020.
34	1 Stop Mechanical Inc. Top agencies Navy (Department of the Navy)	$248,454	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
35	Elektro-Kruck-GMBH Elektroinstallationen Through Elektro-Krueck-Gmbh, Elektroinstallationen Top agencies Army (Department of the Army)	$247,828	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	JX Holdings Inc. Through Nippo Corporation Top agencies USAF (Department of the Air Force)	$244,460	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Kamikita Kensetsu Co.,Ltd. Top agencies USAF (Department of the Air Force)	$232,646	0.5%	Rank history: #39 in FY2022 and not on the FY2023–FY2025 lists; up 42 since FY2020.
38	Jacobs Engineering Group Inc. Through Amentum Technology, Inc. Top agencies Navy (Department of the Navy)	$221,077	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
39	Joseph P Harvey Pe PC Top agencies USAF (Department of the Air Force)	$210,286	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
40	Civil Electrical Construction Company S. De R.l. Top agencies Army (Department of the Army)	$209,688	0.5%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
41	Walter Mechanical Services Inc. Top agencies Army (Department of the Army)	$207,495	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Shekar Engineering, P.l.c Top agencies USDA (Department of Agriculture)	$187,907	0.4%	Rank history: #75 in FY2022, #47 in FY2023 and not on the FY2024–FY2025 lists; down 36 since FY2020.
43	USA Mechanical & Controls LLC Top agencies USAF (Department of the Air Force)	$179,267	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	TST Tactical Defense Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$172,500	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
45	Ameresco Inc. Top agencies Army (Department of the Army)	$166,989	0.4%	Rank history: not on the FY2022–FY2025 lists; up 18 since FY2020.
46	Liberty Electric Inc. Top agencies USAF (Department of the Air Force)	$161,585	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	American Cooling Tower Inc. Top agencies SSA (Social Security Administration)	$148,200	0.3%	Rank history: not on the FY2022–FY2025 lists; down 31 since FY2020.
48	Voris Mechanical Inc. Top agencies GSA (General Services Administration)	$147,737	0.3%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
49	K & T Professional Management Services Inc. Top agencies DHS (Department of Homeland Security)	$126,200	0.3%	Rank history: #57 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
50	Johnson Controls Security Solutions LLC 2 awardees, including Johnson Controls, Inc. Top agencies DOI (Department of the Interior) USAF (Department of the Air Force) DOT (Department of Transportation)	$104,532	0.2%	Rank history: #19 in FY2022, #64 in FY2023 and not on the FY2024–FY2025 lists; down 14 since FY2020.
51	Waldrop Construction Inc. Top agencies USAF (Department of the Air Force)	$94,866	0.2%	Rank history: not on the FY2022–FY2025 lists; down 47 since FY2020.
52	Itemp Heating and Cooling Limited Liability Company Top agencies DOI (Department of the Interior)	$91,483	0.2%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
53	Ingem Ingeniería Electromecánica, S.A. De C.V. Top agencies DOS (Department of State)	$86,320	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	Power Equipment Co. of Memphis Top agencies HHS (Department of Health and Human Services)	$85,311	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	Acumen Enterprises Inc. Top agencies USAF (Department of the Air Force)	$77,924	0.2%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
56	D.r. Holtze Contracting, Inc. Top agencies USAF (Department of the Air Force)	$67,846	0.1%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
57	Safeco Inc. Top agencies Navy (Department of the Navy)	$62,700	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	American Engineering Corporation Top agencies Navy (Department of the Navy)	$61,377	0.1%	Rank history: not on the FY2022–FY2025 lists; down 34 since FY2020.
59	Amalgamated Services, Inc. Top agencies Navy (Department of the Navy)	$60,963	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	Heffler Contracting Group Top agencies Navy (Department of the Navy)	$60,010	0.1%	Rank history: not on the FY2022–FY2025 lists; down 41 since FY2020.
61	Coleman Construction, Inc. Top agencies VA (Department of Veterans Affairs)	$57,198	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Turner Strategic Technologies, LLC Top agencies Navy (Department of the Navy)	$52,684	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	AFG Group Inc. Top agencies GSA (General Services Administration)	$49,880	0.1%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
64	Akima Facilities Operations LLC Top agencies Navy (Department of the Navy)	$45,522	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Tlingit Haida Tribal Business Corporation Through T&H Services, LLC Top agencies Navy (Department of the Navy)	$40,604	0.1%	Rank history: #34 in FY2022, #52 in FY2023, #50 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
66	South Dade Air Conditioning & Refrigeration Inc. Top agencies USAF (Department of the Air Force)	$40,050	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Binary Exchange Technologies LLC Top agencies DOI (Department of the Interior)	$37,480	0.1%	Rank history: not on the FY2022–FY2025 lists; down 53 since FY2020.
68	Tj&B Air Conditioning and Electric, LLC Top agencies DHS (Department of Homeland Security)	$34,924	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Bundesamt FÜR Bauwesen UND Raumordnung Top agencies Army (Department of the Army)	$32,979	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Mtnt Construction, LLC Top agencies DOI (Department of the Interior)	$32,955	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Chase, Carson & White, L.L.C. Top agencies DOI (Department of the Interior)	$32,391	0.1%	Rank history: not on the FY2022–FY2025 lists; down 32 since FY2020.
72	Ajce Corporation Top agencies DHS (Department of Homeland Security)	$29,700	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	De La HOZ Builders, Inc. Top agencies USAF (Department of the Air Force)	$29,139	0.1%	Rank history: not on the FY2022–FY2025 lists; down 41 since FY2020.
74	Wright Bros LLC Top agencies DOI (Department of the Interior)	$29,080	0.1%	Rank history: not on the FY2022–FY2025 lists; down 34 since FY2020.
75	John R Seiberlich Inc. Top agencies VA (Department of Veterans Affairs)	$28,900	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	All American Brothers Company, LLC Top agencies DHS (Department of Homeland Security)	$26,606	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Carolle A Daniel Top agencies Smithsonian (Smithsonian Institution)	$24,529	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Whitehead Electric Co., Inc. Top agencies Army (Department of the Army)	$23,513	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	S & S Fabricators, Inc. Top agencies Smithsonian (Smithsonian Institution)	$23,008	0.1%	Rank history: #71 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
80	Talon Veteran Services Incorporated Top agencies VA (Department of Veterans Affairs)	$22,880	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	RJY Group LLC Top agencies VA (Department of Veterans Affairs)	$19,546	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	American Cooling Service LLC Top agencies DHS (Department of Homeland Security)	$19,113	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	All Temp Heating & Cooling, LLC Top agencies DHS (Department of Homeland Security)	$17,952	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Noresco LLC Through Carrier Corporation Top agencies OPM (Office of Personnel Management)	$14,723	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
85	Core Mechanical Inc. Top agencies DOT (Department of Transportation)	$14,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
86	Kanagawa Nabco Pty. Ltd. Top agencies Navy (Department of the Navy)	$13,900	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 56 since FY2020.
87	East Coast Landscaping & Construction Inc. Top agencies Navy (Department of the Navy)	$13,240	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	I.e.-Pacific, Inc. Top agencies Navy (Department of the Navy)	$12,446	<0.1%	Rank history: #24 in FY2022, #15 in FY2023 and not on the FY2024–FY2025 lists; down 85 since FY2020.
89	Daikin Applied Americas Inc Top agencies DOJ (Department of Justice)	$11,500	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	J. Lawrence Hall Company, Inc. Top agencies DOT (Department of Transportation)	$10,954	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	CCI Utility and Construction Services, LLC Top agencies Navy (Department of the Navy)	$10,358	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 80 since FY2020.
92	B2 Refrigeration LLC Top agencies DHS (Department of Homeland Security)	$9,830	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	FDS Enterprises & Construction, LLC Top agencies DHS (Department of Homeland Security)	$9,816	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Chad Pody Construction Company, L.L.C. Top agencies DOI (Department of the Interior)	$9,400	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Southeastern Industrial Construction, LLC Top agencies USAF (Department of the Air Force)	$8,198	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 88 since FY2020.
96	General and Mechanical Services, LLC Top agencies DHS (Department of Homeland Security)	$7,934	<0.1%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
97	Refcon Services Inc. Top agencies Navy (Department of the Navy)	$3,566	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Trane U.S. Inc. Top agencies DOI (Department of the Interior)	$3,300	<0.1%	Rank history: not on the FY2022 list, #56 in FY2023 and not on the FY2024–FY2025 lists; down 47 since FY2020.
99	CCI General Contractors, LLC Top agencies DOI (Department of the Interior)	$2,450	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 38 since FY2020.
100	Energy Air LLC Top agencies DOI (Department of the Interior)	$2,280	<0.1%	Rank history: #84 in FY2022, #69 in FY2023, #67 in FY2024 and not on the FY2025 list; down 53 since FY2020.

Show 75 more

100 of 105 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 $45.9 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 Z2NB contractors in FY2021?

1. Gulf Pacific Contracting LLC ($6.33M), 2. GFS Crcc JV LLC ($5M), 3. Dawson Enterprises, Inc. ($4.02M), 4. Kelly Construction Services Inc. ($3.74M), 5. Tom Hammonds Enterprises, LLC ($2.24M), 6. Boonerang Consulting LLC ($1.62M), 7. The C.d. Whitfield Co., LLC ($1.43M), 8. Saw Contracting, Inc. ($1.37M), 9. Achuti LLC ($1.12M), 10. Skookum Educational Programs ($1.08M).

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