Top 100 Contractors in PSC Z1: Maintenance, Alteration, Repair Buildings, FY2022

Name: Top 100 Contractors in PSC Z1: Maintenance, Alteration, Repair Buildings, FY2022
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2021 – Sep 30, 2022 Code page on GovTribe

The top 10 won 23% of FY2022 PSC Z1 contract dollars

Contract obligations: $6,936,905,685 Net of deobligations, by contracts coded PSC Z1 or a code under it
Contractors: 3,621 Parent companies with an obligation
Largest contractor: Amentum Services, Inc. $590 million, 8.1% 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	Amentum Services, Inc. 3 awardees, including Central Plateau Cleanup Company, LLC and URS Federal Services International, Inc. Top agencies DOE (Department of Energy) NASA (National Aeronautics and Space Administration) DTRA (Defense Threat Reduction Agency)	$589,608,568	8.1%	Rank history: #1 in FY2021, #1 in FY2023, #2 in FY2024 and not on the FY2025 list; unchanged since FY2021.
2	J & J Maintenance Inc. Top agencies Army (Department of the Army) DHA (Defense Health Agency) DECA (Defense Commissary Agency)	$275,709,482	3.8%	Rank history: #3 in FY2021, #3 in FY2023, #3 in FY2024 and #3 in FY2025; up 1 since FY2021.
3	Jacobs Engineering Group Inc. 6 awardees, including Amentum Technology, Inc., Ch2M Hill, Inc. and Jacobs Government Services Company Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) GAO (Government Accountability Office)	$153,751,872	2.1%	Rank history: #2 in FY2021, #4 in FY2023, #31 in FY2024 and not on the FY2025 list; down 1 since FY2021.
4	Great Lakes Dredge & Dock Corporation 2 awardees Top agencies Army (Department of the Army)	$137,520,528	1.9%	Rank history: #28 in FY2021, #5 in FY2023, #1 in FY2024 and #2 in FY2025; up 24 since FY2021.
5	General Dynamics Corporation 4 awardees, including General Dynamics Land Systems Inc., General Dynamics Mission Systems, Inc. and General Dynamics Information Technology, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) DOT (Department of Transportation)	$121,605,945	1.7%	Rank history: #16 in FY2021, #12 in FY2023, #5 in FY2024 and #5 in FY2025; up 11 since FY2021.
6	Korte -River City JV Top agencies Army (Department of the Army)	$118,631,294	1.6%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
7	Structsure Projects Inc. Top agencies Army (Department of the Army)	$87,029,990	1.2%	Rank history: not on the FY2021 list, #29 in FY2023 and not on the FY2024–FY2025 lists; up 166 since FY2021.
8	EMCOR Group, Inc. 3 awardees, including Emcor Government Services, Inc. and Mesa Energy Systems, Inc. Top agencies DHA (Defense Health Agency) GSA (General Services Administration) GAO (Government Accountability Office)	$71,809,446	1.0%	Rank history: #5 in FY2021, #13 in FY2023, #22 in FY2024 and #25 in FY2025; down 3 since FY2021.
9	Afognak Native Corporation 6 awardees, including Alutiiq Commercial Enterprises LLC, Alutiiq C&W Services, LLC and Alutiiq Construction Services, LLC Top agencies USAF (Department of the Air Force) Treasury (Department of the Treasury) Army (Department of the Army)	$67,670,222	0.9%	Rank history: #13 in FY2021 and not on the FY2023–FY2025 lists; up 4 since FY2021.
10	Aptim Federal Services LLC Top agencies DLA (Defense Logistics Agency)	$62,354,084	0.9%	Rank history: #30 in FY2021, #8 in FY2023, #46 in FY2024 and not on the FY2025 list; up 20 since FY2021.
11	Weston Solutions Holdings, Inc. 2 awardees, including Weston Solutions, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$62,280,502	0.9%	Rank history: #10 in FY2021, #10 in FY2023, #11 in FY2024 and #23 in FY2025; down 1 since FY2021.
12	Norfolk Dredging Company Top agencies Army (Department of the Army)	$60,991,720	0.8%	Rank history: #9 in FY2021, #7 in FY2023, #63 in FY2024 and #10 in FY2025; down 3 since FY2021.
13	Union Station Venture, Ltd. Through Jones Lang Lasalle Americas, Inc. Top agencies GSA (General Services Administration) DECA (Defense Commissary Agency) AOUSC (Administrative Office of the U.S. Courts)	$56,953,850	0.8%	Rank history: #33 in FY2021, #9 in FY2023 and not on the FY2024–FY2025 lists; up 20 since FY2021.
14	Professional Contract Services, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$53,540,218	0.7%	Rank history: #17 in FY2021, #20 in FY2023, #15 in FY2024 and #17 in FY2025; up 3 since FY2021.
15	24 Asset Management Corp Top agencies HUD (Department of Housing and Urban Development)	$51,045,736	0.7%	Rank history: not on the FY2021 list, not on the FY2023 list, #17 in FY2024 and not on the FY2025 list; new.
16	Chugach Alaska Corporation 3 awardees, including Wolf Creek Federal Services LLC, Defense Base Services, LLC and Chugach Consolidated Solutions, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$50,481,349	0.7%	Rank history: #18 in FY2021, #19 in FY2023, #48 in FY2024 and not on the FY2025 list; up 2 since FY2021.
17	American Engineering Corporation Top agencies Navy (Department of the Navy) DODEA (Department of Defense Education Activity) USAF (Department of the Air Force)	$46,041,003	0.6%	Rank history: #58 in FY2021, #15 in FY2023 and not on the FY2024–FY2025 lists; up 41 since FY2021.
18	Advanced American Construction, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$45,226,375	0.6%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
19	Vectrus Systems Corporation Through V2X Systems LLC Top agencies Navy (Department of the Navy)	$43,877,920	0.6%	Rank history: #31 in FY2021, #32 in FY2023, #73 in FY2024 and not on the FY2025 list; up 12 since FY2021.
20	Arctic Slope Regional Corporation 3 awardees, including Asrc Communications, Ltd., Asrc Federal Field Services, LLC and Asrc Consulting & Environmental Services, LLC Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$43,361,138	0.6%	Rank history: #12 in FY2021, #33 in FY2023, #7 in FY2024 and #4 in FY2025; down 8 since FY2021.
21	Facility Services Management, Inc. 2 awardees Top agencies Army (Department of the Army) DHA (Defense Health Agency) USAF (Department of the Air Force)	$43,099,150	0.6%	Rank history: #24 in FY2021, #6 in FY2023, #6 in FY2024 and #12 in FY2025; up 3 since FY2021.
22	Pond Constructors Inc. Top agencies DLA (Defense Logistics Agency)	$41,640,384	0.6%	Rank history: #60 in FY2021, #17 in FY2023, #10 in FY2024 and #16 in FY2025; up 38 since FY2021.
23	Skookum Educational Programs Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) Army (Department of the Army)	$41,513,415	0.6%	Rank history: #21 in FY2021, #18 in FY2023, #42 in FY2024 and #65 in FY2025; down 2 since FY2021.
24	Cashman Dredging and Marine Contracting Co. LLC Top agencies Army (Department of the Army)	$39,454,300	0.5%	Rank history: not on the FY2021 list, #30 in FY2023, #44 in FY2024 and not on the FY2025 list; new.
25	New Residential Investment Corp. Through DGG Re Investments LLC Top agencies HUD (Department of Housing and Urban Development)	$38,247,432	0.5%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
26	Manson Construction Co. Top agencies Army (Department of the Army)	$37,720,361	0.5%	Rank history: #25 in FY2021, #37 in FY2023, #35 in FY2024 and #48 in FY2025; down 1 since FY2021.
27	Nova Global Supply and Services LLC Through Valiant Government Services LLC Top agencies Army (Department of the Army) DHA (Defense Health Agency)	$37,593,701	0.5%	Rank history: #23 in FY2021 and not on the FY2023–FY2025 lists; down 4 since FY2021.
28	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)	$36,172,814	0.5%	Rank history: #41 in FY2021 and not on the FY2023–FY2025 lists; up 13 since FY2021.
29	Marinex Construction Inc. Top agencies Army (Department of the Army)	$36,044,466	0.5%	Rank history: #44 in FY2021, #14 in FY2023, #40 in FY2024 and #63 in FY2025; up 15 since FY2021.
30	J G M Property Group, Inc. Top agencies HUD (Department of Housing and Urban Development) GSA (General Services Administration) USAF (Department of the Air Force)	$33,987,378	0.5%	Rank history: not on the FY2021 list, not on the FY2023 list, #38 in FY2024 and not on the FY2025 list; new.
31	Jll-Midnight Sun Ifms LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$32,948,221	0.5%	Rank history: #35 in FY2021, #48 in FY2023, #39 in FY2024 and #36 in FY2025; up 4 since FY2021.
32	MDM Construction LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$32,623,493	0.4%	Rank history: #74 in FY2021 and not on the FY2023–FY2025 lists; up 42 since FY2021.
33	Bundesministerium FUR Umwelt Naturschutz UND Reaktorsicherheit Through Bundesministerium FÜR Umwelt, Naturschutz UND Reaktorsicherheit Top agencies Army (Department of the Army)	$32,591,212	0.4%	Rank history: #69 in FY2021 and not on the FY2023–FY2025 lists; up 36 since FY2021.
34	Daniel J Keating Co Top agencies DOJ (Department of Justice)	$32,559,640	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
35	Nelson Refrigeration Inc. Top agencies DECA (Defense Commissary Agency)	$32,552,123	0.4%	Rank history: #75 in FY2021, #41 in FY2023 and not on the FY2024–FY2025 lists; up 40 since FY2021.
36	Welch Construction Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$32,058,635	0.4%	Rank history: #71 in FY2021, #97 in FY2023, not on the FY2024 list and #96 in FY2025; up 35 since FY2021.
37	King & George, LLC 2 awardees, including Invicta Global, LLC Top agencies GSA (General Services Administration) Navy (Department of the Navy) USAF (Department of the Air Force)	$31,861,236	0.4%	Rank history: #48 in FY2021, #64 in FY2023, #54 in FY2024 and #35 in FY2025; up 11 since FY2021.
38	Orion Marine Group Inc. Through Orion Marine Construction, Inc. Top agencies Army (Department of the Army)	$30,882,949	0.4%	Rank history: #45 in FY2021, #46 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2021.
39	RQ Construction, LLC Top agencies Navy (Department of the Navy)	$28,330,000	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
40	Louis Berger U.S. Inc. 2 awardees, including VGS Infrastructure Services Inc. and VGS Aircraft Services, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$27,275,776	0.4%	Rank history: #68 in FY2021, #35 in FY2023, #71 in FY2024 and not on the FY2025 list; up 28 since FY2021.
41	Curtin Maritime Corp Top agencies Navy (Department of the Navy)	$26,992,264	0.4%	Rank history: not on the FY2021 list, #23 in FY2023, #64 in FY2024 and #6 in FY2025; new.
42	Herman Construction Group, Inc. Top agencies Army (Department of the Army) DHA (Defense Health Agency)	$26,503,619	0.4%	Rank history: #26 in FY2021, #36 in FY2023 and not on the FY2024–FY2025 lists; down 16 since FY2021.
43	R-Con Construction Inc. Top agencies USAF (Department of the Air Force)	$26,430,301	0.4%	Rank history: not on the FY2021 list, not on the FY2023 list, #84 in FY2024 and not on the FY2025 list; up 346 since FY2021.
44	Action Facilities Management Inc. 2 awardees, including Action Integrated Services LLC Top agencies GSA (General Services Administration) DOJ (Department of Justice) Treasury (Department of the Treasury)	$25,966,034	0.4%	Rank history: #46 in FY2021, #21 in FY2023, #14 in FY2024 and #9 in FY2025; up 2 since FY2021.
45	Bering Straits Native Corporation 4 awardees, including Eagle Eye Electric LLC, Stampede Ventures, Inc. and Bering Global Solutions, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$25,828,587	0.4%	Rank history: not on the FY2021 list, #89 in FY2023 and not on the FY2024–FY2025 lists; up 164 since FY2021.
46	Tetra Tech, Inc. 4 awardees, including Bluewater Federal Solutions, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$25,620,585	0.4%	Rank history: not on the FY2021 list, #47 in FY2023, #13 in FY2024 and #43 in FY2025; up 218 since FY2021.
47	Tlingit Haida Tribal Business Corporation 3 awardees, including T&H Services, LLC and Kira Aviation Services LLC Top agencies DOS (Department of State) Navy (Department of the Navy) USAF (Department of the Air Force)	$24,729,383	0.3%	Rank history: #51 in FY2021, #62 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2021.
48	Four Tribes Enterprises, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Commerce (Department of Commerce)	$22,948,980	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 270 since FY2021.
49	SKE Technical Services GMBH 3 awardees, including SKE SRL and SKE Support Services GMBH Top agencies DODEA (Department of Defense Education Activity) Army (Department of the Army) USAF (Department of the Air Force)	$22,944,391	0.3%	Rank history: #57 in FY2021, #59 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2021.
50	Pensacola Bay Support Services LLC Top agencies Navy (Department of the Navy)	$22,785,010	0.3%	Rank history: #47 in FY2021 and not on the FY2023–FY2025 lists; down 3 since FY2021.
51	Global Pacific Design Builders, LLC Top agencies Navy (Department of the Navy)	$22,665,713	0.3%	Rank history: not on the FY2021 list, #16 in FY2023, #52 in FY2024 and #33 in FY2025; new.
52	Kirlin Builders LLC Through FSI Construction, LLC Top agencies Army (Department of the Army)	$22,257,440	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 388 since FY2021.
53	Solpac Construction Inc. Top agencies Navy (Department of the Navy)	$20,983,828	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
54	The Chenega Corporation 5 awardees, including Chenega Tri-Services, LLC, Chenega Facilities Management LLC and Chenega Applied Solutions, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) DOI (Department of the Interior)	$20,915,249	0.3%	Rank history: #54 in FY2021, #87 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2021.
55	Midwest Construction Co Top agencies Army (Department of the Army)	$20,904,200	0.3%	Rank history: #43 in FY2021, #84 in FY2023 and not on the FY2024–FY2025 lists; down 12 since FY2021.
56	Bcss, LLC Top agencies DHS (Department of Homeland Security)	$20,895,454	0.3%	Rank history: #81 in FY2021 and not on the FY2023–FY2025 lists; up 25 since FY2021.
57	DB Netz AG Regionalnetz Oberpfalz Top agencies Army (Department of the Army)	$20,548,227	0.3%	Rank history: not on the FY2021 list, #55 in FY2023, #61 in FY2024 and #94 in FY2025; new.
58	Johnsondanforth, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$20,536,387	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 265 since FY2021.
59	Tetra Tech-Maytag Aircraft Corporation Joint Venture Top agencies DLA (Defense Logistics Agency)	$20,358,683	0.3%	Rank history: #27 in FY2021 and not on the FY2023–FY2025 lists; down 32 since FY2021.
60	Tatitlek Technologies, LLC Top agencies DOS (Department of State)	$20,230,324	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
61	Dongkuk Industries Co. Ltd. Through Dongkuk Structures & Construction Company Limited Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$20,217,373	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 306 since FY2021.
62	Bristol Bay Native Corporation 4 awardees, including Specpro Environmental Services LLC, SES Infrastructure Services LLC and CCI Energy and Construction Services, LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$20,137,556	0.3%	Rank history: #64 in FY2021, #75 in FY2023, #47 in FY2024 and #31 in FY2025; up 2 since FY2021.
63	Southern Dredging Co Inc. Top agencies Army (Department of the Army)	$19,262,127	0.3%	Rank history: not on the FY2021 list, not on the FY2023 list, #79 in FY2024 and not on the FY2025 list; up 422 since FY2021.
64	South Dade Air Conditioning & Refrigeration Inc. Top agencies GSA (General Services Administration) Army (Department of the Army) USDA (Department of Agriculture)	$19,220,450	0.3%	Rank history: not on the FY2021 list, #40 in FY2023, #28 in FY2024 and #22 in FY2025; up 55 since FY2021.
65	Coastal Design & Construction, Inc. Top agencies DOI (Department of the Interior)	$19,191,742	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
66	Bering Straits Technical Services, LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$19,154,204	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 43 since FY2021.
67	ESA South, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$18,929,008	0.3%	Rank history: not on the FY2021 list, #24 in FY2023 and not on the FY2024–FY2025 lists; up 57 since FY2021.
68	Spectrum Solutions Acquisitions, LLC Top agencies HUD (Department of Housing and Urban Development)	$18,704,183	0.3%	Rank history: not on the FY2021 list, not on the FY2023 list, #81 in FY2024 and not on the FY2025 list; new.
69	Mountain Point, LLC Top agencies Army (Department of the Army)	$18,603,558	0.3%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
70	Tactical Infrastructure Maintenance Solutions LLC Top agencies DHS (Department of Homeland Security)	$18,523,026	0.3%	Rank history: #59 in FY2021, #94 in FY2023, #76 in FY2024 and #64 in FY2025; down 11 since FY2021.
71	Royce Construction Services, LLC Top agencies Army (Department of the Army) DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$18,256,386	0.2%	Rank history: #63 in FY2021, #56 in FY2023, #77 in FY2024 and not on the FY2025 list; down 8 since FY2021.
72	Nan Inc. Top agencies Navy (Department of the Navy)	$18,254,824	0.2%	Rank history: #89 in FY2021 and not on the FY2023–FY2025 lists; up 17 since FY2021.
73	Ajanta Consulting LLC Top agencies Army (Department of the Army)	$18,248,783	0.2%	Rank history: #98 in FY2021 and not on the FY2023–FY2025 lists; up 25 since FY2021.
74	Insight Pacific, LLC Top agencies Navy (Department of the Navy)	$17,862,111	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
75	M.c. Dean, Inc. Top agencies GSA (General Services Administration) DOJ (Department of Justice) DHS (Department of Homeland Security)	$17,616,599	0.2%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #49 in FY2025; up 68 since FY2021.
76	JXR Constructors Inc. Top agencies VA (Department of Veterans Affairs)	$17,342,445	0.2%	Rank history: #77 in FY2021 and not on the FY2023–FY2025 lists; up 1 since FY2021.
77	LB & B Associates Inc. Top agencies GSA (General Services Administration) NARA (National Archives and Records Administration) Commerce (Department of Commerce)	$17,274,340	0.2%	Rank history: not on the FY2021 list, #99 in FY2023, #78 in FY2024 and #58 in FY2025; up 30 since FY2021.
78	Elektro-Kruck-GMBH Elektroinstallationen Through Elektro-Krueck-Gmbh, Elektroinstallationen Top agencies Army (Department of the Army)	$17,244,242	0.2%	Rank history: not on the FY2021 list, #82 in FY2023 and not on the FY2024–FY2025 lists; up 334 since FY2021.
79	Yukon Fire Protection Services, Inc. Top agencies GSA (General Services Administration) USAF (Department of the Air Force) SSA (Social Security Administration)	$16,696,699	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 134 since FY2021.
80	Coactint LLC Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$16,615,340	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
81	Columbus Barricades, Inc. Top agencies Army (Department of the Army)	$16,597,993	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 64 since FY2021.
82	Spees-Hernandez JV 2, LLC Top agencies VA (Department of Veterans Affairs)	$16,188,016	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
83	Northern Management Services, Inc. Top agencies GSA (General Services Administration) DOI (Department of the Interior) AOUSC (Administrative Office of the U.S. Courts)	$15,751,992	0.2%	Rank history: not on the FY2021 list, #60 in FY2023, #69 in FY2024 and #61 in FY2025; up 22 since FY2021.
84	Robbert Construction, Inc. Top agencies VA (Department of Veterans Affairs)	$15,738,850	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 209 since FY2021.
85	Eagle Contractors, Inc. Top agencies VA (Department of Veterans Affairs)	$15,685,510	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 175 since FY2021.
86	Utility Systems Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$15,337,784	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
87	Advon Corporation Top agencies VA (Department of Veterans Affairs)	$15,225,580	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 68 since FY2021.
88	Koniag, Inc. 2 awardees, including Pacarctic, LLC Top agencies DOS (Department of State) GSA (General Services Administration) Navy (Department of the Navy)	$15,033,357	0.2%	Rank history: #94 in FY2021 and not on the FY2023–FY2025 lists; up 6 since FY2021.
89	Industrial Maintenance Services Inc. Top agencies VA (Department of Veterans Affairs)	$14,693,137	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 252 since FY2021.
90	State of California Controllers Office 2 awardees, including Lcor Asset Management Limited Partnership and California Department of Forestry and Fire Protection Top agencies GSA (General Services Administration) DOI (Department of the Interior)	$14,408,137	0.2%	Rank history: #85 in FY2021, #79 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2021.
91	Signature Renovations LLC Top agencies DOJ (Department of Justice) WHS (DOD Washington Headquarters Service) GSA (General Services Administration)	$14,305,738	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
92	Matthews Brothers Dredging, LLC Top agencies Army (Department of the Army)	$13,746,227	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 93 since FY2021.
93	PAE Government Services Inc. 3 awardees, including Amentum Design and Facility Management and Amentum Spaceport LLC Top agencies Navy (Department of the Navy) DOS (Department of State) USAF (Department of the Air Force)	$13,670,722	0.2%	Rank history: #62 in FY2021, #91 in FY2023 and not on the FY2024–FY2025 lists; down 31 since FY2021.
94	Daniels Building Co Inc. Top agencies VA (Department of Veterans Affairs)	$13,643,159	0.2%	Rank history: #84 in FY2021, not on the FY2023–FY2024 lists and #77 in FY2025; down 10 since FY2021.
95	Koman Construction, LLC Top agencies DHS (Department of Homeland Security)	$13,500,162	0.2%	Rank history: not on the FY2021 list, not on the FY2023 list, #85 in FY2024 and #45 in FY2025; new.
96	CMP Commercial Construction Inc. Top agencies DOT (Department of Transportation) VA (Department of Veterans Affairs)	$13,490,122	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 257 since FY2021.
97	BJD Services LLC Top agencies Army (Department of the Army)	$13,377,445	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 44 since FY2021.
98	Nana Regional Corporation Inc 4 awardees, including Jade Creek Construction LLC, Sava Workforce Solutions LLC and Akima Support Operations, LLC Top agencies Navy (Department of the Navy) DOJ (Department of Justice) Army (Department of the Army)	$13,344,959	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 3 since FY2021.
99	Cypress-Sbs JV LLC Top agencies Army (Department of the Army)	$13,341,850	0.2%	Rank history: not on the FY2021 list, #100 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
100	Environmental Chemical Corporation 3 awardees, including Ecco GMBH and Environmental Chemical Corporation Italy S.R.L. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$13,307,913	0.2%	Rank history: #97 in FY2021 and not on the FY2023–FY2025 lists; down 3 since FY2021.

Show 75 more

100 of 3,621 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC Z1

Code	Net obligations	Largest contractor
Z1AA Maintenance of Office Buildings	$955,729,365	Daniel J Keating Co
Z1DA Maintenance of Hospitals and Infirmaries	$920,839,610	J & J Maintenance Inc.
Z1JZ Maintenance of Miscellaneous Buildings	$777,330,215	J & J Maintenance Inc.
Z1AZ Maintenance of Other Administrative Facilities and Service Buildings	$546,724,281	Korte -River City JV
Z1KF Maintenance of Dredging Facilities	$465,970,184	Great Lakes Dredge & Dock Corporation
Z1PZ Maintenance of Other Non-Building Facilities	$347,677,447	Jacobs Engineering Group Inc.
Z1NA Maintenance of Fuel Supply Facilities	$269,099,051	Aptim Federal Services LLC
Z1LB Maintenance of Highways/Roads/Streets/Bridges/Railways	$229,510,740	Tactical Infrastructure Maintenance Solutions LLC
Z1QA Maintenance of Restoration of Real Property (Public or Private)	$190,374,536	Midwest Construction Co
Z1FZ Maintenance of Other Residential Buildings	$183,540,532	24 Asset Management Corp
Z1FA Maintenance of Family Housing Facilities	$124,939,306	Global Pacific Design Builders, LLC
Z1EZ Maintenance of Other Industrial Buildings	$123,826,472	General Dynamics Corporation
Z1BD Maintenance of Airport Runways and Taxiways	$107,425,534	RQ Construction, LLC
Z1DZ Maintenance of Other Hospital Buildings	$105,274,815	Solpac Construction Inc.
Z1HB Maintenance of Government-Owned Government-Operated (Gogo) R&D Facilities	$102,652,223	General Dynamics Corporation
Z1BG Maintenance of Electronic and Communications Facilities	$91,583,509	General Dynamics Corporation
Z1FC Maintenance of Troop Housing Facilities	$80,833,237	JX Holdings Inc.
Z1KA Maintenance of Dams	$54,374,080	C.j. Mahan Construction Company, LLC
Z1EB Maintenance of Maintenance Buildings	$53,189,827	Ajanta Consulting LLC
Z1NB Maintenance of Heating and Cooling Plants	$48,032,221	Hensel Phelps Construction Co
Z1BA Maintenance of Air Traffic Control Towers	$41,720,426	CMP Commercial Construction Inc.
Z1NZ Maintenance of Other Utilities	$40,300,336	Glen Mar-Hensel Phelps
Z1BZ Maintenance of Other Airfield Structures	$37,590,150	Global Systemized Industry
Z1NE Maintenance of Water Supply Facilities	$36,402,257	TCG Construction Inc.
Z1CA Maintenance of Schools	$35,666,700	SKE Technical Services GMBH
Z1DB Maintenance of Laboratories and Clinics	$31,021,715	C Martin Co Inc.
Z1JA Maintenance of Museums and Exhibition Buildings	$26,079,870	B3 Enterprises LLC
Z1CZ Maintenance of Other Educational Buildings	$19,775,533	Patricia I. Romero, Inc.
Z1BC Maintenance of Radar and Navigational Facilities	$19,701,598	Georgia TECH Research Corp
Z1PC Maintenance of Unimproved Real Property (Land)	$18,458,099	White Lake Dock & Dredge Inc.
Z1FB Maintenance of Recreational Buildings	$16,471,860	American Engineering Corporation
Z1ND Maintenance of Sewage and Waste Facilities	$12,117,594	Allen Gill Construction Inc.
Z1PA Maintenance of Recreation Facilities (Non-Building)	$11,483,204	Brice Builders, LLC
Z1GZ Maintenance of Other Warehouse Buildings	$11,410,517	American Engineering Corporation
Z1LZ Maintenance of Parking Facilities	$10,095,554	Solid Ground LLC
Z1FD Maintenance of Dining Facilities	$2,917,115	Tekko Enterprises Inc.

Show all 36

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 $7.31 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 2022 ran Oct 1, 2021 – Sep 30, 2022. 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 FY2021. "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 FY2021 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 Z1 contractors in FY2022?

1. Amentum Services, Inc. ($590M), 2. J & J Maintenance Inc. ($276M), 3. Jacobs Engineering Group Inc. ($154M), 4. Great Lakes Dredge & Dock Corporation ($138M), 5. General Dynamics Corporation ($122M), 6. Korte -River City JV ($119M), 7. Structsure Projects Inc. ($87M), 8. EMCOR Group, Inc. ($71.8M), 9. Afognak Native Corporation ($67.7M), 10. Aptim Federal Services LLC ($62.4M).

On GovTribe

Research every contractor on this list

Every contract, task order and IDV they hold
Their subsidiaries, teammates and competitors
Open opportunities they're positioned for
Alerts when they win new work

Try for free Login