Top 100 Contractors in PSC Z2: Maintenance, Alteration, Repair Nonbuildings, FY2021

Name: Top 100 Contractors in PSC Z2: Maintenance, Alteration, Repair Nonbuildings, FY2021
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

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

The top 10 won 12% of FY2021 PSC Z2 contract dollars

Contract obligations: $10,957,684,408 Net of deobligations, by contracts coded PSC Z2 or a code under it
Contractors: 4,440 Parent companies with an obligation
Largest contractor: Alberici-Mortenson A Joint Venture $370 million, 3.3% of obligations
Data as of: Oct 14, 2026

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	Alberici-Mortenson A Joint Venture Top agencies Navy (Department of the Navy)	$369,949,779	3.3%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
2	Jacobs Engineering Group Inc. 5 awardees, including Ch2M Hill Plateau Remediation Company, Ch2M Hill Constructors, Inc. and Amentum Technology, Inc. Top agencies DOE (Department of Energy) Navy (Department of the Navy) USAF (Department of the Air Force)	$160,089,253	1.4%	Rank history: #42 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
3	Hensel Phelps Construction Co 5 awardees Top agencies Navy (Department of the Navy) GSA (General Services Administration) HHS (Department of Health and Human Services)	$144,027,400	1.3%	Rank history: #6 in FY2022, #38 in FY2023, #30 in FY2024 and #22 in FY2025; up 11 since FY2020.
4	Aptim Federal Services LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$116,564,972	1.0%	Rank history: #12 in FY2022, #9 in FY2023, #33 in FY2024 and not on the FY2025 list; down 2 since FY2020.
5	Turner Construction Company 3 awardees, including Sociedad Espanola De Montajes Industriales SA Top agencies HHS (Department of Health and Human Services) SSA (Social Security Administration) DHS (Department of Homeland Security)	$108,285,929	1.0%	Rank history: #26 in FY2022, #84 in FY2023 and not on the FY2024–FY2025 lists; up 29 since FY2020.
6	Merck & Co. Inc. Through Merck Sharp & Dohme LLC Top agencies HHS (Department of Health and Human Services)	$105,400,000	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
7	H2O Guam JV Top agencies Navy (Department of the Navy)	$97,995,000	0.9%	Rank history: not on the FY2022 list, #8 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
8	AECOM 7 awardees, including AECOM Technical Services, Inc., URS Group, Inc. and Shimmick Construction Company, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$97,267,800	0.9%	Rank history: #4 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
9	J.e. Mcamis, Inc. Top agencies Army (Department of the Army)	$96,604,323	0.9%	Rank history: #23 in FY2022, not on the FY2023 list, #80 in FY2024 and not on the FY2025 list; up 26 since FY2020.
10	Rooney Holdings, Inc. Through Manhattan Construction Company LLC Top agencies DLA (Defense Logistics Agency)	$87,092,320	0.8%	Rank history: not on the FY2022–FY2025 lists; up 403 since FY2020.
11	RC Construction Co & Millstone Weber A Joint Venture Top agencies Army (Department of the Army)	$81,554,847	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
12	American Engineering Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$74,705,420	0.7%	Rank history: #14 in FY2022, #11 in FY2023, #5 in FY2024 and #13 in FY2025; up 8 since FY2020.
13	The Cianbro Companies Through Cianbro Corporation Top agencies Navy (Department of the Navy)	$73,497,393	0.7%	Rank history: not on the FY2022–FY2023 lists, #7 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
14	Honeywell International Inc. 4 awardees, including Honeywell Building Solutions SES Corp Top agencies GSA (General Services Administration) NARA (National Archives and Records Administration) USDA (Department of Agriculture)	$68,532,830	0.6%	Rank history: #19 in FY2022, #21 in FY2023, not on the FY2024 list and #21 in FY2025; new, not ranked in FY2020.
15	CMS Corporation Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$66,257,168	0.6%	Rank history: not on the FY2022 list, #91 in FY2023, #22 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
16	C.j. Mahan Construction Company, LLC Top agencies Army (Department of the Army)	$66,201,819	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
17	Heffler Contracting Group Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$61,513,509	0.5%	Rank history: #33 in FY2022, #94 in FY2023 and not on the FY2024–FY2025 lists; up 37 since FY2020.
18	Peter Kiewit Sons', Inc. 3 awardees, including Kiewit Infrastructure West Co and Kiewit Infrastructure South Co Top agencies Navy (Department of the Navy) DOI (Department of the Interior) Army (Department of the Army)	$59,670,475	0.5%	Rank history: #80 in FY2022, #77 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
19	Manson Construction Co. Top agencies Navy (Department of the Navy)	$55,505,000	0.5%	Rank history: #15 in FY2022, not on the FY2023 list, #8 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
20	Atkins Nuclear Secured Holdings Corporation Through Isotek Systems, LLC Top agencies DOE (Department of Energy)	$54,633,150	0.5%	Rank history: #29 in FY2022, #36 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2020.
21	Brasfield & Gorrie LLC Top agencies GSA (General Services Administration) DOT (Department of Transportation)	$52,742,124	0.5%	Rank history: #16 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
22	Cook Inlet Region Inc. 4 awardees, including Silver Mountain Construction, LLC, Weldin Construction LLC and North Wind Construction Services, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DHS (Department of Homeland Security)	$51,616,941	0.5%	Rank history: not on the FY2022 list, #66 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
23	JX Holdings Inc. 2 awardees, including Nippo Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$48,990,861	0.4%	Rank history: #24 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; down 12 since FY2020.
24	Talion Construction, LLC Top agencies VA (Department of Veterans Affairs) DHS (Department of Homeland Security) Navy (Department of the Navy)	$46,180,286	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
25	Integrated Construction Enterprises Inc. Top agencies GSA (General Services Administration) DHS (Department of Homeland Security) DOS (Department of State)	$44,972,010	0.4%	Rank history: not on the FY2022–FY2025 lists; up 76 since FY2020.
26	Sourceamerica Top agencies Army (Department of the Army)	$44,291,513	0.4%	Rank history: #22 in FY2022, #34 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
27	Goldbelt, Incorporated 4 awardees, including Goldbelt Operations Support Services, LLC and Facility Support Services LLC Top agencies DOE (Department of Energy) Army (Department of the Army)	$43,103,964	0.4%	Rank history: not on the FY2022–FY2025 lists; up 48 since FY2020.
28	Dawson Enterprises, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$42,693,883	0.4%	Rank history: #48 in FY2022, #42 in FY2023, not on the FY2024 list and #28 in FY2025; down 3 since FY2020.
29	Four Tribes Enterprises, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) USDA (Department of Agriculture)	$42,261,854	0.4%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
30	Vectrus Systems Corporation 3 awardees, including Vectrus Federal Services GMBH and V2X Systems LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$41,861,948	0.4%	Rank history: #25 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; down 14 since FY2020.
31	HHI Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$40,366,958	0.4%	Rank history: #59 in FY2022, #16 in FY2023, #31 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
32	Big-D Construction Corp Top agencies GSA (General Services Administration)	$39,420,504	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
33	Olgoonik Enterprises, LLC 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) GSA (General Services Administration)	$38,907,611	0.3%	Rank history: #44 in FY2022, #19 in FY2023, #40 in FY2024 and #25 in FY2025; new, not ranked in FY2020.
34	Guarantee Interiors, Inc. Top agencies VA (Department of Veterans Affairs)	$38,902,765	0.3%	Rank history: not on the FY2022–FY2025 lists; up 73 since FY2020.
35	Obayashi Corporation 2 awardees, including Kraemer North America LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$38,294,696	0.3%	Rank history: not on the FY2022 list, #44 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
36	Doyon Government Contracting Inc. 6 awardees, including Doyon Management Services, LLC, Doyon Technical Services, LLC and Doyon Project Services, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) DHS (Department of Homeland Security)	$36,214,089	0.3%	Rank history: #71 in FY2022 and not on the FY2023–FY2025 lists; down 17 since FY2020.
37	Bauer AG Through Bauer Foundation Corp Top agencies Army (Department of the Army)	$36,039,308	0.3%	Rank history: #45 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
38	Bering Straits Native Corporation 5 awardees, including Stampede Ventures, Inc., Bering Global Solutions, LLC and Bering Straits Development Co. Top agencies WHS (DOD Washington Headquarters Service) DHS (Department of Homeland Security) Army (Department of the Army)	$35,522,279	0.3%	Rank history: #92 in FY2022, #67 in FY2023, #71 in FY2024 and #29 in FY2025; up 145 since FY2020.
39	Black Construction / Mace International Joint Venture Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$35,172,146	0.3%	Rank history: #96 in FY2022, not on the FY2023 list, #27 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
40	Bristol Bay Native Corporation 5 awardees, including Specpro Environmental Services LLC, Bristol Engineering Services Company, LLC and Bristol General Contractors, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$34,890,813	0.3%	Rank history: not on the FY2022 list, #55 in FY2023 and not on the FY2024–FY2025 lists; up 84 since FY2020.
41	Grunley Construction Co., Inc. Top agencies Smithsonian (Smithsonian Institution) DOI (Department of the Interior) USDA (Department of Agriculture)	$34,711,280	0.3%	Rank history: not on the FY2022 list, #7 in FY2023, #13 in FY2024 and #56 in FY2025; down 31 since FY2020.
42	Ameresco Inc. 2 awardees, including Ameresco Select, Inc. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$34,486,944	0.3%	Rank history: #90 in FY2022, #64 in FY2023, not on the FY2024 list and #79 in FY2025; down 24 since FY2020.
43	L.s. Black Constructors, LLC Top agencies Army (Department of the Army)	$34,276,691	0.3%	Rank history: not on the FY2022–FY2023 lists, #90 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
44	Ahtna, Incorporated 5 awardees, including Ahtna Construction & Primary Products Company, LLC, Ahtna Environmental, Inc. and Ahtna Design-Build Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) DOI (Department of the Interior)	$33,550,770	0.3%	Rank history: not on the FY2022–FY2025 lists; up 22 since FY2020.
45	Brantley Construction Services, LLC Top agencies Navy (Department of the Navy)	$32,937,066	0.3%	Rank history: not on the FY2022–FY2023 lists, #65 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
46	Cox Construction Co Top agencies DHS (Department of Homeland Security)	$32,749,158	0.3%	Rank history: not on the FY2022–FY2025 lists; up 415 since FY2020.
47	The Christman Company Top agencies GSA (General Services Administration) DOI (Department of the Interior)	$32,555,908	0.3%	Rank history: not on the FY2022–FY2023 lists, #83 in FY2024 and not on the FY2025 list; up 147 since FY2020.
48	Leebcor Services LLC Top agencies Navy (Department of the Navy)	$32,042,052	0.3%	Rank history: not on the FY2022–FY2025 lists; up 174 since FY2020.
49	Dubuque Barge and Fleeting Service Co Top agencies Army (Department of the Army)	$32,036,241	0.3%	Rank history: not on the FY2022–FY2025 lists; up 120 since FY2020.
50	B.l. Harbert Holdings, L.L.C. Through BL Harbert International LLC Top agencies Navy (Department of the Navy)	$31,849,093	0.3%	Rank history: not on the FY2022–FY2025 lists; up 72 since FY2020.
51	Conti Enterprises Inc. Through Conti Federal Services, Inc. Top agencies Navy (Department of the Navy)	$31,576,227	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	C.A.R.P.I. U.S.a. Inc. Top agencies DOI (Department of the Interior)	$31,247,964	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
53	Sjc-Bvil LLC Top agencies Navy (Department of the Navy)	$30,851,681	0.3%	Rank history: not on the FY2022–FY2025 lists; up 112 since FY2020.
54	Sedona- Nasco Joint Venture Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$30,812,599	0.3%	Rank history: #49 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
55	Siemens Aktiengesellschaft 2 awardees, including Siemens Government Technologies Inc. and Siemens Industry Inc. Top agencies Navy (Department of the Navy) GSA (General Services Administration) HHS (Department of Health and Human Services)	$30,807,641	0.3%	Rank history: not on the FY2022 list, #87 in FY2023, #77 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
56	Turner Strategic Technologies, LLC Top agencies Navy (Department of the Navy)	$29,999,018	0.3%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; up 56 since FY2020.
57	Truebeck Construction, Inc. Top agencies GSA (General Services Administration)	$29,920,802	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	C J W Construction, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$29,905,345	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Hyundai Engineering & Construction Co.,Ltd. Top agencies Army (Department of the Army)	$29,733,296	0.3%	Rank history: not on the FY2022–FY2025 lists; up 64 since FY2020.
60	Etcon Inc. Top agencies Army (Department of the Army)	$29,600,457	0.3%	Rank history: not on the FY2022–FY2025 lists; up 106 since FY2020.
61	JE Dunn Construction Group Inc. Through J.e. Dunn Construction Company Top agencies USAF (Department of the Air Force) GSA (General Services Administration) Army (Department of the Army)	$28,875,472	0.3%	Rank history: not on the FY2022–FY2023 lists, #18 in FY2024 and not on the FY2025 list; up 192 since FY2020.
62	Sumitomo Heavy Industries, Ltd. Through Sumiju Yokosuka Kogyo Co., Ltd. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$28,321,234	0.3%	Rank history: not on the FY2022 list, #46 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
63	Power Pro Plus Inc. 2 awardees Top agencies Navy (Department of the Navy) Army (Department of the Army)	$28,020,768	0.2%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
64	North State Mechanical Inc. Top agencies Navy (Department of the Navy)	$27,741,600	0.2%	Rank history: not on the FY2022–FY2025 lists; up 399 since FY2020.
65	Weston Solutions Holdings, Inc. 2 awardees, including Weston Solutions Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) DIA (Defense Intelligence Agency)	$27,724,299	0.2%	Rank history: #46 in FY2022, #1 in FY2023, #1 in FY2024 and not on the FY2025 list; down 50 since FY2020.
66	Asturian Group, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$27,613,288	0.2%	Rank history: not on the FY2022–FY2025 lists; down 28 since FY2020.
67	Mirait.one- Acty JV Top agencies Navy (Department of the Navy) DODEA (Department of Defense Education Activity)	$27,346,746	0.2%	Rank history: #30 in FY2022 and not on the FY2023–FY2025 lists; up 48 since FY2020.
68	J.i. Garcia Construction, Inc. Top agencies Navy (Department of the Navy)	$27,280,180	0.2%	Rank history: not on the FY2022–FY2025 lists; up 381 since FY2020.
69	ESA South, Inc. Top agencies VA (Department of Veterans Affairs)	$27,204,322	0.2%	Rank history: not on the FY2022 list, #29 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
70	Luhr Bros., Inc. Top agencies Army (Department of the Army)	$27,003,618	0.2%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; up 132 since FY2020.
71	Wood Environment & Infrastructure Solutions Inc. 3 awardees, including WSP USA Environment & Infrastructure Inc. and C E C Controls Co, Inc. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$26,682,298	0.2%	Rank history: #52 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; up 326 since FY2020.
72	Natives of Kodiak, Incorporated 3 awardees, including Koman Construction, LLC and Koman Government Solutions LLC Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) Navy (Department of the Navy)	$26,495,846	0.2%	Rank history: not on the FY2022 list, #100 in FY2023 and not on the FY2024–FY2025 lists; up 112 since FY2020.
73	Synergy Electric Company, Inc. Top agencies Navy (Department of the Navy)	$25,974,086	0.2%	Rank history: not on the FY2022–FY2023 lists, #59 in FY2024 and not on the FY2025 list; up 351 since FY2020.
74	Semper TEK Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) Army (Department of the Army)	$25,136,928	0.2%	Rank history: not on the FY2022–FY2025 lists; up 73 since FY2020.
75	E S Wagner Co Top agencies DOI (Department of the Interior)	$24,964,290	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	CDM / Cape, A Joint Venture Top agencies DLA (Defense Logistics Agency)	$24,893,670	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	JP Donovan Construction Inc. Top agencies NASA (National Aeronautics and Space Administration)	$24,507,820	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	W.m. Jordan Company, Incorporated Top agencies Navy (Department of the Navy)	$24,426,482	0.2%	Rank history: not on the FY2022–FY2025 lists; down 21 since FY2020.
79	Oguragumi, K.K. Top agencies Navy (Department of the Navy)	$24,300,686	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Intec Group LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$24,096,806	0.2%	Rank history: #40 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
81	Barnhart-Reese Construction, Inc. Top agencies Navy (Department of the Navy)	$23,970,297	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	General Electric Company Through GE Renewables US LLC Top agencies Army (Department of the Army)	$23,325,593	0.2%	Rank history: not on the FY2022–FY2023 lists, #78 in FY2024 and #26 in FY2025; up 5 since FY2020.
83	Eastern Construction & Electric Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) AOUSC (Administrative Office of the U.S. Courts)	$23,098,220	0.2%	Rank history: not on the FY2022–FY2025 lists; up 55 since FY2020.
84	Williams Building Company, Inc. Top agencies VA (Department of Veterans Affairs)	$23,043,931	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	Joyce & Associates Construction, Inc. Top agencies Navy (Department of the Navy) DODEA (Department of Defense Education Activity)	$22,988,993	0.2%	Rank history: not on the FY2022 list, #40 in FY2023, #69 in FY2024 and not on the FY2025 list; down 38 since FY2020.
86	Saw Contracting, Inc. Top agencies VA (Department of Veterans Affairs) AOUSC (Administrative Office of the U.S. Courts)	$22,669,833	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Bundesministerium FUR Umwelt Naturschutz UND Reaktorsicherheit Through Bundesministerium FÜR Umwelt, Naturschutz UND Reaktorsicherheit Top agencies Army (Department of the Army)	$22,087,161	0.2%	Rank history: not on the FY2022–FY2025 lists; down 36 since FY2020.
88	Etolin Strait Development Group LLC 3 awardees, including Etolin Strait Partners, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$22,030,275	0.2%	Rank history: #69 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; down 39 since FY2020.
89	John C. Grimberg Co., Inc. Top agencies GSA (General Services Administration) Army (Department of the Army) HHS (Department of Health and Human Services)	$21,597,942	0.2%	Rank history: not on the FY2022–FY2025 lists; up 66 since FY2020.
90	Power Washing Extreme, Inc. (Dba) Pwe, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$21,525,814	0.2%	Rank history: not on the FY2022–FY2025 lists; up 399 since FY2020.
91	Ames Construction, Inc. Top agencies DOI (Department of the Interior)	$21,139,439	0.2%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
92	Cmcs - T Simons JV Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$20,920,900	0.2%	Rank history: not on the FY2022–FY2025 lists; up 118 since FY2020.
93	Jabez-Absher 1 Joint Venture Top agencies Navy (Department of the Navy)	$20,805,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Environet Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) Army (Department of the Army)	$20,695,564	0.2%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
95	Sygnos Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) EPA (Environmental Protection Agency)	$20,386,735	0.2%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; up 119 since FY2020.
96	The Whiting-Turner Contracting Company Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) GSA (General Services Administration)	$20,382,900	0.2%	Rank history: #17 in FY2022, #2 in FY2023, #15 in FY2024 and #52 in FY2025; down 63 since FY2020.
97	Barlovento LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$20,048,663	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Walga Ross Group JV Top agencies Navy (Department of the Navy)	$19,978,980	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Veterans Construction Coalition LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$19,970,576	0.2%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
100	Garco Construction, Inc. Top agencies Army (Department of the Army)	$19,822,044	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 4,440 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC Z2

Code	Net obligations	Largest contractor
Z2AA Repair or Alteration of Office Buildings	$2,077,145,539	Turner Construction Company
Z2JZ Repair or Alteration of Miscellaneous Buildings	$1,849,250,072	AECOM
Z2AZ Repair or Alteration of Other Administrative Facilities and Service Buildings	$694,255,210	Hensel Phelps Construction Co
Z2DA Repair or Alteration of Hospitals and Infirmaries	$648,636,803	Guarantee Interiors, Inc.
Z2PZ Repair or Alteration of Other Non-Building Facilities	$615,224,304	Manson Construction Co.
Z2ED Repair or Alteration of Ship Construction and Repair Facilities	$577,214,209	Alberici-Mortenson A Joint Venture
Z2LB Repair or Alteration of Highways/Roads/Streets/Bridges/Railways	$360,602,205	Etcon Inc.
Z2QA Repair or Alteration of Restoration of Real Property (Public or Private)	$345,825,154	Luhr Bros., Inc.
Z2KA Repair or Alteration of Dams	$305,933,236	C.j. Mahan Construction Company, LLC
Z2NZ Repair or Alteration of Other Utilities	$253,423,472	Synergy Electric Company, Inc.
Z2NA Repair or Alteration of Fuel Supply Facilities	$245,201,480	CMS Corporation
Z2BZ Repair or Alteration of Other Airfield Structures	$207,531,256	RC Construction Co & Millstone Weber A Joint Venture
Z2EC Repair or Alteration of Production Buildings	$201,857,325	Merck & Co. Inc.
Z2BD Repair or Alteration of Airport Runways and Taxiways	$197,190,060	Sjc-Bvil LLC
Z2FC Repair or Alteration of Troop Housing Facilities	$172,632,806	W.m. Jordan Company, Incorporated
Z2EZ Repair or Alteration of Other Industrial Buildings	$167,999,455	SES Construction and Fuel Services LLC
Z2KZ Repair or Alteration of Other Conservation and Development Facilities	$161,092,850	J.e. Mcamis, Inc.
Z2EB Repair or Alteration of Maintenance Buildings	$149,933,701	L.s. Black Constructors, LLC
Z2FA Repair or Alteration of Family Housing Facilities	$138,552,180	Obayashi Corporation
Z2NE Repair or Alteration of Water Supply Facilities	$129,321,085	Peter Kiewit Sons', Inc.
Z2DZ Repair or Alteration of Other Hospital Buildings	$121,043,598	The Whiting-Turner Contracting Company
Z2CZ Repair or Alteration of Other Educational Buildings	$87,712,856	Heffler Contracting Group
Z2JA Repair or Alteration of Museums and Exhibition Buildings	$85,267,482	Grunley Construction Co., Inc.
Z2FF Repair or Alteration of Penal Facilities	$82,393,515	All State Construction Inc.
Z2GZ Repair or Alteration of Other Warehouse Buildings	$63,646,775	Tazewell-Bgi JV, LLC
Z2PC Repair or Alteration of Unimproved Real Property (Land)	$61,628,043	General Electric Company
Z2DB Repair or Alteration of Laboratories and Clinics	$50,405,451	Black & Veatch Special Projects Corp.
Z2ND Repair or Alteration of Sewage and Waste Facilities	$49,378,541	City of Marion
Z2LZ Repair or Alteration of Parking Facilities	$45,505,406	Ritz Construction Inc.
Z2NB Repair or Alteration of Heating and Cooling Plants	$45,496,502	Gulf Pacific Contracting LLC
Z2FD Repair or Alteration of Dining Facilities	$41,435,777	Peter Vander Werff Construction, Inc.
Z2PA Repair or Alteration of Recreation Facilities (Non-Building)	$39,823,225	Continental Heavy Civil Corp
Z2BC Repair or Alteration of Radar and Navigational Facilities	$39,166,529	Nagan Construction Inc.
Z2FB Repair or Alteration of Recreational Buildings	$29,667,236	Kone Inc.
Z2AB Repair or Alteration of Conference Space and Facilities	$28,278,783	Hitt Contracting, Inc.
Z2FZ Repair or Alteration of Other Residential Buildings	$27,634,616	National Contracting Services, LLC
Z2BG Repair or Alteration of Electronic and Communications Facilities	$23,144,141	Sitemaster Inc.
Z2PB Repair or Alteration of Exhibit Design (Non-Building)	$20,981,188	Clark / Smoot / Consigli, A Joint Venture
Z2CA Repair or Alteration of Schools	$17,231,345	Mirait.one- Acty JV
Z2HB Repair or Alteration of Government-Owned Government-Operated (Gogo) R&D Facilities	$16,103,443	Rand & Jones Enterprises Co, Inc.
Z2EA Repair or Alteration of Ammunition Facilities	$15,784,920	Kellie W. Tipton Construction Co, Inc.
Z2GC Repair or Alteration of Fuel Storage Buildings	$14,609,770	Sea Pac Engineering Inc.
Z2BA Repair or Alteration of Air Traffic Control Towers	$12,500,419	Asturian Group, Inc.

Show all 43

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 $11.3 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 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 Z2 contractors in FY2021?

1. Alberici-Mortenson A Joint Venture ($370M), 2. Jacobs Engineering Group Inc. ($160M), 3. Hensel Phelps Construction Co ($144M), 4. Aptim Federal Services LLC ($117M), 5. Turner Construction Company ($108M), 6. Merck & Co. Inc. ($105M), 7. H2O Guam JV ($98M), 8. AECOM ($97.3M), 9. J.e. Mcamis, Inc. ($96.6M), 10. Rooney Holdings, Inc. ($87.1M).

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