Top 100 Contractors in PSC Z2: Maintenance, Alteration, Repair Nonbuildings, FY2023

Name: Top 100 Contractors in PSC Z2: Maintenance, Alteration, Repair Nonbuildings, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 18% of FY2023 PSC Z2 contract dollars

Contract obligations: $15,117,003,124 Net of deobligations, by contracts coded PSC Z2 or a code under it
Contractors: 4,152 Parent companies with an obligation
Largest contractor: Weston Solutions Holdings, Inc. $1.06 billion, 6.8% 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	Weston Solutions Holdings, Inc. 2 awardees, including Weston Solutions Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,059,647,894	6.8%	Rank history: #65 in FY2021, #46 in FY2022, #1 in FY2024 and not on the FY2025 list; up 45 since FY2022.
2	The Whiting-Turner Contracting Company Top agencies Commerce (Department of Commerce) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$360,138,524	2.3%	Rank history: #96 in FY2021, #17 in FY2022, #15 in FY2024 and #52 in FY2025; up 15 since FY2022.
3	Kiewit-Alberici Siop Macc AJV Top agencies Navy (Department of the Navy)	$325,073,120	2.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #6 in FY2025; new.
4	Structsure Projects Inc. Top agencies DHA (Defense Health Agency) Army (Department of the Army) GSA (General Services Administration)	$207,566,788	1.3%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2024 and #11 in FY2025; new.
5	Guyco Inc Top agencies Army (Department of the Army)	$167,209,500	1.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
6	RQ Construction, LLC Top agencies Navy (Department of the Navy)	$163,543,995	1.0%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2024 and #3 in FY2025; new.
7	Grunley Construction Co., Inc. Top agencies Army (Department of the Army) NARA (National Archives and Records Administration) Smithsonian (Smithsonian Institution)	$157,359,794	1.0%	Rank history: #41 in FY2021, not on the FY2022 list, #13 in FY2024 and #56 in FY2025; up 332 since FY2022.
8	H2O Guam JV Top agencies Navy (Department of the Navy)	$138,452,704	0.9%	Rank history: #7 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
9	Aptim Federal Services LLC 2 awardees Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) Navy (Department of the Navy)	$120,074,757	0.8%	Rank history: #4 in FY2021, #12 in FY2022, #33 in FY2024 and not on the FY2025 list; up 3 since FY2022.
10	Messer Construction Co Top agencies Army (Department of the Army) GSA (General Services Administration)	$119,372,592	0.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 221 since FY2022.
11	American Engineering Corporation 2 awardees, including Oshima Shokai Co., Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$116,542,802	0.7%	Rank history: #12 in FY2021, #14 in FY2022, #5 in FY2024 and #13 in FY2025; up 3 since FY2022.
12	Consigli Holdings Inc. Through Consigli Construction Co., Inc. Top agencies GSA (General Services Administration) DOI (Department of the Interior) Navy (Department of the Navy)	$108,812,066	0.7%	Rank history: not on the FY2021 list, #37 in FY2022, #10 in FY2024 and not on the FY2025 list; up 25 since FY2022.
13	Andritz AG Through Andritz Hydro Corp Top agencies Army (Department of the Army) DOI (Department of the Interior)	$104,496,430	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 374 since FY2022.
14	Paragon Professional Services LLC Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$99,625,701	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
15	Harper Construction Company, Inc. Top agencies Navy (Department of the Navy)	$91,475,412	0.6%	Rank history: not on the FY2021 list, #74 in FY2022 and not on the FY2024–FY2025 lists; up 59 since FY2022.
16	HHI Corporation Top agencies USAF (Department of the Air Force)	$88,813,870	0.6%	Rank history: #31 in FY2021, #59 in FY2022, #31 in FY2024 and not on the FY2025 list; up 43 since FY2022.
17	Sgjv, LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$81,159,763	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 179 since FY2022.
18	Tutor Perini Corporation 2 awardees, including Perini Management Services, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$80,419,983	0.5%	Rank history: not on the FY2021–FY2022 lists, #37 in FY2024 and not on the FY2025 list; new.
19	Olgoonik Enterprises, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DHS (Department of Homeland Security)	$80,236,930	0.5%	Rank history: #33 in FY2021, #44 in FY2022, #40 in FY2024 and #25 in FY2025; up 25 since FY2022.
20	R.a. Burch Construction Co., Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$74,889,342	0.5%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2024 and not on the FY2025 list; new.
21	Honeywell International Inc. 2 awardees, including Honeywell Building Solutions SES Corp Top agencies GSA (General Services Administration) NARA (National Archives and Records Administration) USDA (Department of Agriculture)	$73,279,903	0.5%	Rank history: #14 in FY2021, #19 in FY2022, not on the FY2024 list and #21 in FY2025; down 2 since FY2022.
22	Signature Renovations LLC Top agencies Army (Department of the Army) DOJ (Department of Justice) GSA (General Services Administration)	$70,324,282	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 421 since FY2022.
23	JX Holdings Inc. 2 awardees, including Nippo Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$69,115,034	0.4%	Rank history: #23 in FY2021, #24 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
24	Vectrus Systems Corporation 2 awardees, including Vectrus Federal Services GMBH Top agencies Army (Department of the Army) Navy (Department of the Navy)	$62,838,266	0.4%	Rank history: #30 in FY2021, #25 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
25	Trade West Construction, Inc. Top agencies Army (Department of the Army)	$61,191,434	0.4%	Rank history: not on the FY2021 list, #20 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
26	Mitchell Brothers Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$58,097,942	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 95 since FY2022.
27	BWI Tpc, A Joint Venture Top agencies DOI (Department of the Interior)	$56,854,529	0.4%	Rank history: not on the FY2021 list, #9 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
28	Wood Environment & Infrastructure Solutions Inc. 2 awardees, including WSP USA Environment & Infrastructure Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$56,424,990	0.4%	Rank history: #71 in FY2021, #52 in FY2022 and not on the FY2024–FY2025 lists; up 24 since FY2022.
29	ESA South, Inc. Top agencies VA (Department of Veterans Affairs)	$54,846,534	0.4%	Rank history: #69 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
30	NW Construction, Inc. Top agencies DOI (Department of the Interior)	$54,748,917	0.4%	Rank history: not on the FY2021 list, #10 in FY2022, #11 in FY2024 and #5 in FY2025; down 20 since FY2022.
31	Tepa Construction Solutions, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$53,266,072	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
32	Conti Federal Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$52,485,951	0.3%	Rank history: not on the FY2021 list, #18 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
33	Nan Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$51,346,492	0.3%	Rank history: not on the FY2021 list, #28 in FY2022, #61 in FY2024 and #4 in FY2025; down 5 since FY2022.
34	Sourceamerica Top agencies Army (Department of the Army)	$51,150,081	0.3%	Rank history: #26 in FY2021, #22 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
35	Nordic PCL Construction Inc. Top agencies Army (Department of the Army)	$51,039,000	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
36	Atkins Nuclear Secured Holdings Corporation Through Isotek Systems, LLC Top agencies DOE (Department of Energy)	$50,508,521	0.3%	Rank history: #20 in FY2021, #29 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
37	SES Construction and Fuel Services LLC Top agencies Army (Department of the Army) DHA (Defense Health Agency) NASA (National Aeronautics and Space Administration)	$49,753,644	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 250 since FY2022.
38	Hensel Phelps Construction Co 4 awardees Top agencies Navy (Department of the Navy) DOI (Department of the Interior) Army (Department of the Army)	$49,396,525	0.3%	Rank history: #3 in FY2021, #6 in FY2022, #30 in FY2024 and #22 in FY2025; down 32 since FY2022.
39	Hensel Phelps - Shimizu JV 4 awardees, including Hensel Phelps Construction Co Top agencies Navy (Department of the Navy) DOI (Department of the Interior) GSA (General Services Administration)	$48,391,508	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
40	Joyce & Associates Construction, Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$48,245,674	0.3%	Rank history: #85 in FY2021, not on the FY2022 list, #69 in FY2024 and not on the FY2025 list; up 88 since FY2022.
41	Intec Group LLC Top agencies Army (Department of the Army)	$45,462,158	0.3%	Rank history: #80 in FY2021, #40 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
42	Dawson Enterprises, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$44,181,460	0.3%	Rank history: #28 in FY2021, #48 in FY2022, not on the FY2024 list and #28 in FY2025; up 6 since FY2022.
43	Insight Pacific, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$43,414,027	0.3%	Rank history: not on the FY2021 list, #31 in FY2022, not on the FY2024 list and #23 in FY2025; down 12 since FY2022.
44	Obayashi Corporation 2 awardees, including E.w. Howell Co., LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$43,031,213	0.3%	Rank history: #35 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
45	Environmental Chemical Corporation 6 awardees, including Contrack ECC LLC, ECC Diego Garcia LLC and Environmental Chemical Corporation Italy S.R.L. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$41,831,140	0.3%	Rank history: not on the FY2021 list, #7 in FY2022 and not on the FY2024–FY2025 lists; down 38 since FY2022.
46	Sumitomo Heavy Industries, Ltd. Through Sumiju Yokosuka Kogyo Co., Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DECA (Defense Commissary Agency)	$41,258,828	0.3%	Rank history: #62 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 161 since FY2022.
47	Red Eagle JV Top agencies Army (Department of the Army)	$41,121,620	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
48	Kellie W. Tipton Construction Co, Inc. 2 awardees, including Tipton-Fsi Joint Venture, LLC Top agencies Army (Department of the Army)	$41,051,522	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
49	Caddell-Nan A Joint Venture Top agencies Navy (Department of the Navy)	$41,016,160	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
50	Midnight Sun-Centennial Kirratchiaq JV, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$40,138,563	0.3%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2024 and #100 in FY2025; up 70 since FY2022.
51	SES Electrical LLC Top agencies Army (Department of the Army)	$38,752,064	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #46 in FY2025; up 59 since FY2022.
52	Core Tech-Hdcc-Kajima LLC Top agencies Navy (Department of the Navy)	$37,916,502	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
53	Ross Group Construction Corporation, LLC Top agencies GSA (General Services Administration) AOUSC (Administrative Office of the U.S. Courts) Army (Department of the Army)	$37,584,795	0.2%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2024 and not on the FY2025 list; up 217 since FY2022.
54	Etolin Strait Development Group LLC 2 awardees, including Etolin Strait Partners, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$37,546,609	0.2%	Rank history: #88 in FY2021, #69 in FY2022 and not on the FY2024–FY2025 lists; up 15 since FY2022.
55	Bristol Bay Native Corporation 5 awardees, including Bristol General Contractors, LLC, Bristol Engineering Services Company, LLC and SES Infrastructure Services LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$37,165,018	0.2%	Rank history: #40 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
56	Copper Construction Company, Inc. Top agencies Army (Department of the Army)	$37,051,528	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
57	I.e.-Pacific, Inc. Top agencies Navy (Department of the Navy)	$37,044,685	0.2%	Rank history: not on the FY2021 list, #64 in FY2022, #57 in FY2024 and not on the FY2025 list; up 7 since FY2022.
58	Mcmillen LLC Top agencies Army (Department of the Army) DOI (Department of the Interior)	$37,013,751	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 223 since FY2022.
59	Triple Canopy Inc. 4 awardees, including Centerra Integrated Facilities Services, LLC, Centerra Integrated Services, LLC and Centerra Group, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) GSA (General Services Administration)	$36,389,941	0.2%	Rank history: not on the FY2021 list, #62 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
60	Gustav Keoni Top agencies DOJ (Department of Justice) Army (Department of the Army)	$36,288,136	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
61	Sea PAC Engineering Inc Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) GSA (General Services Administration)	$35,168,651	0.2%	Rank history: not on the FY2021–FY2022 lists, #45 in FY2024 and #9 in FY2025; new.
62	Golden Triangle Construction Co Inc. Top agencies Army (Department of the Army)	$35,086,000	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
63	Armitage SAI JV Top agencies Army (Department of the Army) Navy (Department of the Navy)	$34,766,539	0.2%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2024 and not on the FY2025 list; new.
64	Ameresco Inc. 2 awardees, including Ameresco Select, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$34,752,883	0.2%	Rank history: #42 in FY2021, #90 in FY2022, not on the FY2024 list and #79 in FY2025; up 26 since FY2022.
65	Louis C. Allegrone, Inc. Top agencies DOI (Department of the Interior)	$33,879,319	0.2%	Rank history: not on the FY2021 list, #89 in FY2022 and not on the FY2024–FY2025 lists; up 24 since FY2022.
66	Cook Inlet Region Inc. 4 awardees, including Weldin Construction LLC, Silver Mountain Construction, LLC and North Wind Site Services LLC Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) Army (Department of the Army)	$33,599,204	0.2%	Rank history: #22 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 51 since FY2022.
67	Bering Straits Native Corporation 4 awardees, including Stampede Ventures, Inc. and Bering Straits Development Co. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAF (Department of the Air Force)	$33,416,411	0.2%	Rank history: #38 in FY2021, #92 in FY2022, #71 in FY2024 and #29 in FY2025; up 25 since FY2022.
68	Sauer Holdings Inc. 2 awardees, including Sauer Construction, LLC and Ruthrauff Sauer, LLC Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) VA (Department of Veterans Affairs)	$33,216,553	0.2%	Rank history: not on the FY2021 list, #11 in FY2022 and not on the FY2024–FY2025 lists; down 57 since FY2022.
69	Acty Co., Ltd. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$32,485,145	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 148 since FY2022.
70	PCC Ventures Top agencies Army (Department of the Army)	$32,432,466	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
71	Silver Lake Construction LLC Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$32,429,114	0.2%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2024 and not on the FY2025 list; new.
72	Military & Federal Construction Co., Inc. Top agencies Navy (Department of the Navy)	$32,395,292	0.2%	Rank history: not on the FY2021 list, #72 in FY2022, not on the FY2024 list and #58 in FY2025; unchanged since FY2022.
73	Red Point Construction LLC Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) Army (Department of the Army)	$32,305,219	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
74	Meltech Corporation, Inc. Top agencies USAF (Department of the Air Force) GSA (General Services Administration) DHS (Department of Homeland Security)	$31,525,672	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	Hawk-Niking LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$31,364,944	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
76	Southern Contracting, LLC Top agencies USAF (Department of the Air Force)	$31,230,417	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
77	Peter Kiewit Sons', Inc. 2 awardees, including Kiewit Infrastructure West Co and Weeks Marine Inc. Top agencies Navy (Department of the Navy)	$31,201,990	0.2%	Rank history: #18 in FY2021, #80 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
78	Blue World Construction Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$30,880,403	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
79	Bbix LLC Top agencies USAF (Department of the Air Force)	$29,807,000	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
80	Coffman Specialties, Inc. Top agencies Navy (Department of the Navy)	$29,216,248	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
81	Olgoonik Federal LLC 4 awardees, including Olgoonik General, LLC, Olgoonik Logistics, LLC and Olgoonik Enterprises, LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) GSA (General Services Administration)	$28,932,962	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
82	National Native American Construction, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) GSA (General Services Administration)	$28,700,408	0.2%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2024 and not on the FY2025 list; up 163 since FY2022.
83	Nadiad Inc. Top agencies Navy (Department of the Navy)	$28,587,085	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
84	Turner Construction Company 2 awardees, including Sociedad Espanola De Montajes Industriales SA Top agencies GSA (General Services Administration) Navy (Department of the Navy) USAF (Department of the Air Force)	$28,586,968	0.2%	Rank history: #5 in FY2021, #26 in FY2022 and not on the FY2024–FY2025 lists; down 58 since FY2022.
85	Cadence Contract Services, LLC Top agencies Army (Department of the Army)	$28,079,266	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 78 since FY2022.
86	Blue Pacific JV LLC Top agencies VA (Department of Veterans Affairs)	$27,979,166	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
87	Siemens Aktiengesellschaft 4 awardees, including Siemens Government Technologies Inc., Siemens Industry Inc. and Siemens Medical Solutions Usa, Inc. Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$27,958,171	0.2%	Rank history: #55 in FY2021, not on the FY2022 list, #77 in FY2024 and not on the FY2025 list; up 98 since FY2022.
88	Southeast Cherokee Construction, Inc. Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$27,820,148	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 147 since FY2022.
89	R&I Construction, Inc. Top agencies Army (Department of the Army)	$27,665,451	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 70 since FY2022.
90	Wright Bros LLC Top agencies GSA (General Services Administration) NASA (National Aeronautics and Space Administration) DOJ (Department of Justice)	$27,217,404	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 28 since FY2022.
91	CMS Corporation Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$27,091,000	0.2%	Rank history: #15 in FY2021, not on the FY2022 list, #22 in FY2024 and not on the FY2025 list; up 85 since FY2022.
92	TST Tactical Defense Solutions, Inc. Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$26,704,266	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
93	Teya Enterprises LLC Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior)	$26,659,255	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Heffler Contracting Group Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$26,504,587	0.2%	Rank history: #17 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; down 61 since FY2022.
95	Sori E&C Co.,Ltd Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$26,499,042	0.2%	Rank history: not on the FY2021 list, #55 in FY2022 and not on the FY2024–FY2025 lists; down 40 since FY2022.
96	Reasor-Asturian JV, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$26,408,320	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 77 since FY2022.
97	Itsi Gilbane Japan G.K. Through Gilbane Building Company Top agencies Army (Department of the Army)	$26,396,962	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
98	AC JV One LLC Top agencies VA (Department of Veterans Affairs)	$26,389,682	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
99	Sevenson-Usa Environmental Joint Venture II Top agencies Navy (Department of the Navy)	$26,183,600	0.2%	Rank history: not on the FY2021 list, #100 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
100	Natives of Kodiak, Incorporated 3 awardees, including Koman Construction, LLC, Koman Government Solutions LLC and Koman Integrated Solutions, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$25,927,210	0.2%	Rank history: #72 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 189 since FY2022.

Show 75 more

100 of 4,152 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC Z2

Code	Net obligations	Largest contractor
Z2JZ Repair or Alteration of Miscellaneous Buildings	$3,905,486,542	Weston Solutions Holdings, Inc.
Z2AA Repair or Alteration of Office Buildings	$2,489,661,637	The Whiting-Turner Contracting Company
Z2AZ Repair or Alteration of Other Administrative Facilities and Service Buildings	$946,559,915	Messer Construction Co
Z2DA Repair or Alteration of Hospitals and Infirmaries	$824,387,996	Structsure Projects Inc.
Z2FC Repair or Alteration of Troop Housing Facilities	$730,989,090	Guyco Inc
Z2ED Repair or Alteration of Ship Construction and Repair Facilities	$579,858,081	Kiewit-Alberici Siop Macc AJV
Z2PZ Repair or Alteration of Other Non-Building Facilities	$556,659,897	Andritz AG
Z2LB Repair or Alteration of Highways/Roads/Streets/Bridges/Railways	$453,251,554	Milani Construction LLC
Z2QA Repair or Alteration of Restoration of Real Property (Public or Private)	$395,317,401	Louis C. Allegrone, Inc.
Z2NA Repair or Alteration of Fuel Supply Facilities	$308,986,402	Wood Environment & Infrastructure Solutions Inc.
Z2KA Repair or Alteration of Dams	$306,012,764	NW Construction, Inc.
Z2BZ Repair or Alteration of Other Airfield Structures	$302,208,549	HHI Corporation
Z2NZ Repair or Alteration of Other Utilities	$292,063,428	Aptim Federal Services LLC
Z2BD Repair or Alteration of Airport Runways and Taxiways	$226,874,735	Mitchell Brothers Inc.
Z2DZ Repair or Alteration of Other Hospital Buildings	$219,701,675	The Whiting-Turner Contracting Company
Z2NE Repair or Alteration of Water Supply Facilities	$202,330,798	Blue World Construction Inc.
Z2EZ Repair or Alteration of Other Industrial Buildings	$185,569,317	Bbix LLC
Z2EB Repair or Alteration of Maintenance Buildings	$163,843,639	HHI Corporation
Z2CZ Repair or Alteration of Other Educational Buildings	$142,574,482	Obayashi Corporation
Z2FF Repair or Alteration of Penal Facilities	$130,696,759	Gustav Keoni
Z2NB Repair or Alteration of Heating and Cooling Plants	$126,837,502	Sgjv, LLC
Z2FB Repair or Alteration of Recreational Buildings	$126,634,093	Tutor Perini Corporation
Z2DB Repair or Alteration of Laboratories and Clinics	$117,209,068	Amentum Services, Inc.
Z2GZ Repair or Alteration of Other Warehouse Buildings	$95,813,072	SKE Support Services GMBH
Z2EC Repair or Alteration of Production Buildings	$91,551,159	Shape Construction Inc
Z2FA Repair or Alteration of Family Housing Facilities	$87,868,370	JX Holdings Inc.
Z2BG Repair or Alteration of Electronic and Communications Facilities	$74,876,517	American Engineering Corporation
Z2JA Repair or Alteration of Museums and Exhibition Buildings	$67,360,881	Structural Group, Inc.
Z2FZ Repair or Alteration of Other Residential Buildings	$61,420,238	American Engineering Corporation
Z2LZ Repair or Alteration of Parking Facilities	$58,992,449	Athena Construction Group, Inc.
Z2PA Repair or Alteration of Recreation Facilities (Non-Building)	$53,830,975	Re-Engineered Business Solutions, Inc.
Z2FD Repair or Alteration of Dining Facilities	$53,001,566	The Whiting-Turner Contracting Company
Z2CA Repair or Alteration of Schools	$46,812,294	Kallidus Technologies, Inc.
Z2EA Repair or Alteration of Ammunition Facilities	$43,867,797	Tecc Corporation
Z2PD Repair or Alteration of Waste Treatment and Storage Facilities	$41,670,788	Hensel Phelps Construction Co
Z2BC Repair or Alteration of Radar and Navigational Facilities	$33,025,109	CMP Commercial Construction Inc.
Z2ND Repair or Alteration of Sewage and Waste Facilities	$28,842,911	Sygnos Inc.
Z2HB Repair or Alteration of Government-Owned Government-Operated (Gogo) R&D Facilities	$26,368,847	Olgoonik Federal LLC
Z2GC Repair or Alteration of Fuel Storage Buildings	$15,135,814	Joyce & Associates Construction, Inc.
Z2BA Repair or Alteration of Air Traffic Control Towers	$14,612,512	IAN Corporation
Z2AB Repair or Alteration of Conference Space and Facilities	$11,897,326	Hitt Contracting, Inc.
Z2PC Repair or Alteration of Unimproved Real Property (Land)	$11,423,627	Heffler Contracting Group

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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 $15.6 billion 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

Who were the top 10 PSC Z2 contractors in FY2023?

1. Weston Solutions Holdings, Inc. ($1.06B), 2. The Whiting-Turner Contracting Company ($360M), 3. Kiewit-Alberici Siop Macc AJV ($325M), 4. Structsure Projects Inc. ($208M), 5. Guyco Inc ($167M), 6. RQ Construction, LLC ($164M), 7. Grunley Construction Co., Inc. ($157M), 8. H2O Guam JV ($138M), 9. Aptim Federal Services LLC ($120M), 10. Messer Construction Co ($119M).

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