Top 100 Contractors in PSC Z1JZ: Maintenance of Miscellaneous Buildings, FY2023

Name: Top 100 Contractors in PSC Z1JZ: Maintenance of Miscellaneous Buildings, FY2023
Creator: GovTribe

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

The top 10 won 60% of FY2023 PSC Z1JZ contract dollars

Contract obligations: $1,148,866,738 Net of deobligations, by contracts coded PSC Z1JZ
Contractors: 687 Parent companies with an obligation
Largest contractor: ACS Actividades DE Construccion Y Servicios SA $389 million, 33.4% 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	ACS Actividades DE Construccion Y Servicios SA Through Turner Construction Company Top agencies Army (Department of the Army)	$388,960,120	33.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
2	Jacobs Engineering Group Inc. Through Amentum Technology, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$75,347,489	6.5%	Rank history: #1 in FY2021, #3 in FY2022, #34 in FY2024 and not on the FY2025 list; up 1 since FY2022.
3	Chugach Alaska Corporation 3 awardees, including Wolf Creek Federal Services LLC and Chugach Solutions Enterprise, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$47,141,881	4.1%	Rank history: #6 in FY2021, #4 in FY2022, #10 in FY2024 and not on the FY2025 list; up 1 since FY2022.
4	Nelson Refrigeration Inc. Top agencies DECA (Defense Commissary Agency)	$34,802,475	3.0%	Rank history: #9 in FY2021, #5 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
5	J & J Maintenance Inc. Top agencies DECA (Defense Commissary Agency) USAF (Department of the Air Force) Army (Department of the Army)	$28,269,257	2.4%	Rank history: #20 in FY2021, #1 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
6	Union Station Venture, Ltd. Through Jones Lang Lasalle Americas, Inc. Top agencies DECA (Defense Commissary Agency)	$28,086,357	2.4%	Rank history: #10 in FY2021, #6 in FY2022, #87 in FY2024 and not on the FY2025 list; unchanged since FY2022.
7	Herman Construction Group, Inc. Top agencies Army (Department of the Army)	$27,858,680	2.4%	Rank history: #4 in FY2021, #8 in FY2022, #77 in FY2024 and #66 in FY2025; up 1 since FY2022.
8	Action Facilities Management Inc. Top agencies DOJ (Department of Justice)	$24,333,113	2.1%	Rank history: #21 in FY2021, #28 in FY2022, #7 in FY2024 and #10 in FY2025; up 20 since FY2022.
9	Facility Services Management, Inc. Through FSI Construction, LLC Top agencies Army (Department of the Army)	$23,022,970	2.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
10	Hensel Phelps - Shimizu JV Through Hensel Phelps Construction Co Top agencies Commerce (Department of Commerce)	$19,206,114	1.7%	Rank history: not on the FY2021–FY2022 lists, #68 in FY2024 and not on the FY2025 list; new.
11	Elektro-Kruck-GMBH Elektroinstallationen Through Elektro-Krueck-Gmbh, Elektroinstallationen Top agencies Army (Department of the Army)	$19,031,890	1.6%	Rank history: #57 in FY2021, #10 in FY2022, #56 in FY2024 and not on the FY2025 list; down 1 since FY2022.
12	Cypress-Sbs JV LLC Top agencies Army (Department of the Army)	$16,911,296	1.5%	Rank history: #17 in FY2021, #11 in FY2022, #19 in FY2024 and #21 in FY2025; down 1 since FY2022.
13	Structsure Projects Inc. Top agencies Army (Department of the Army)	$13,023,801	1.1%	Rank history: not on the FY2021 list, #2 in FY2022, not on the FY2024 list and #50 in FY2025; down 11 since FY2022.
14	Aed, Inc. Through AED Stratecon, LLC Top agencies DOS (Department of State)	$10,868,155	0.9%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2024 and #76 in FY2025; new.
15	Burton Construction, Inc. Top agencies USAF (Department of the Air Force)	$10,313,164	0.9%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
16	DB Netz AG Regionalnetz Oberpfalz Top agencies Army (Department of the Army)	$9,826,897	0.8%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2024 and not on the FY2025 list; new.
17	Olgoonik Enterprises, LLC Top agencies Commerce (Department of Commerce)	$8,557,145	0.7%	Rank history: #28 in FY2021, #51 in FY2022, #12 in FY2024 and #43 in FY2025; up 34 since FY2022.
18	CYE Enterprises Inc. Top agencies USAF (Department of the Air Force)	$8,152,024	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
19	Dean / Fluor, LLC Top agencies DOJ (Department of Justice)	$7,970,175	0.7%	Rank history: #18 in FY2021, #74 in FY2022, #27 in FY2024 and #8 in FY2025; up 55 since FY2022.
20	Dpec & RCS Joint Venture, LLC Top agencies USAF (Department of the Air Force)	$7,741,609	0.7%	Rank history: not on the FY2021 list, #23 in FY2022, #95 in FY2024 and not on the FY2025 list; up 3 since FY2022.
21	Arctic Slope Regional Corporation Through Asrc Federal Field Services, LLC Top agencies USAF (Department of the Air Force)	$7,576,589	0.7%	Rank history: #23 in FY2021, #14 in FY2022, #17 in FY2024 and #13 in FY2025; down 7 since FY2022.
22	Siemens Aktiengesellschaft 2 awardees, including Siemens Industry Inc. Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce) Navy (Department of the Navy)	$7,227,437	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 162 since FY2022.
23	Valiant Integrated Services LLC Through Valiant Government Services LLC Top agencies Army (Department of the Army)	$6,528,649	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 79 since FY2022.
24	Nana Regional Corporation Inc. Through Jade Creek Construction LLC Top agencies DOJ (Department of Justice)	$6,490,326	0.6%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2024 and not on the FY2025 list; new.
25	HHI Corporation Top agencies Commerce (Department of Commerce)	$6,452,968	0.6%	Rank history: not on the FY2021–FY2022 lists, #20 in FY2024 and #57 in FY2025; new.
26	Interim Homes Inc Top agencies DOS (Department of State)	$6,225,842	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
27	Mec-Fs JV Top agencies Army (Department of the Army)	$6,166,825	0.5%	Rank history: #29 in FY2021, #19 in FY2022, #30 in FY2024 and not on the FY2025 list; down 8 since FY2022.
28	R-Con Construction Inc. Top agencies USAF (Department of the Air Force)	$6,119,416	0.5%	Rank history: #51 in FY2021, #7 in FY2022, #9 in FY2024 and #16 in FY2025; down 21 since FY2022.
29	Kcorp-Dean, LLC Top agencies Commerce (Department of Commerce)	$6,073,212	0.5%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2024 and #31 in FY2025; new.
30	Belt Built CFM Construction Services JV, LLC Top agencies DOJ (Department of Justice)	$5,773,053	0.5%	Rank history: #14 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
31	Mirador Enterprises, Inc. Top agencies USAF (Department of the Air Force)	$5,750,180	0.5%	Rank history: #26 in FY2021, #44 in FY2022, #40 in FY2024 and #25 in FY2025; up 13 since FY2022.
32	Reasor Building Group LLC Top agencies USAF (Department of the Air Force)	$5,701,841	0.5%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2024 and #38 in FY2025; new.
33	Loyalty Support Services Top agencies USAF (Department of the Air Force)	$5,055,580	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
34	Native American Services Corp. Top agencies USAF (Department of the Air Force)	$4,934,084	0.4%	Rank history: #60 in FY2021, #17 in FY2022, #36 in FY2024 and #24 in FY2025; down 17 since FY2022.
35	Amentum Services, Inc. Top agencies DOS (Department of State)	$4,804,484	0.4%	Rank history: not on the FY2021–FY2022 lists, #18 in FY2024 and not on the FY2025 list; new.
36	CCS King George LLC Top agencies Army (Department of the Army)	$4,628,415	0.4%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2024 and #23 in FY2025; new.
37	Argus CJW JV 3 LLC Top agencies Navy (Department of the Navy)	$4,240,843	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
38	RWD Consulting LLC Top agencies HHS (Department of Health and Human Services)	$3,950,840	0.3%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2024 and not on the FY2025 list; up 157 since FY2022.
39	Dongkuk Industries Co. Ltd. Through Dongkuk Structures & Construction Company Limited Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$3,896,117	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
40	D7, LLC 2 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$3,757,375	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 242 since FY2022.
41	EDL Construction Inc. Top agencies USAF (Department of the Air Force)	$3,689,058	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
42	Te-Fsi JV, LLC Top agencies Army (Department of the Army)	$3,608,265	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
43	Hensel Phelps Construction Co 2 awardees, including Hensel Phelps Services LLC Top agencies Commerce (Department of Commerce)	$3,560,963	0.3%	Rank history: #2 in FY2021, not on the FY2022 list, #53 in FY2024 and #54 in FY2025; returned.
44	Government Contracting Resources, Inc. Top agencies Navy (Department of the Navy)	$3,500,642	0.3%	Rank history: #48 in FY2021, #46 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
45	Emcor Group Inc. Through Emcor Government Services, Inc. Top agencies Army (Department of the Army)	$3,488,653	0.3%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2024 and not on the FY2025 list; up 208 since FY2022.
46	Doliveira Systems LLC Top agencies Commerce (Department of Commerce)	$3,304,525	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 126 since FY2022.
47	2A LLC Top agencies Commerce (Department of Commerce)	$3,185,164	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
48	Spectrum Electrical Services, Inc. Top agencies DOS (Department of State)	$2,911,895	0.3%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2024 and not on the FY2025 list; new.
49	American Engineering Corporation Top agencies Navy (Department of the Navy) Army (Department of the Army)	$2,894,395	0.2%	Rank history: not on the FY2021 list, #45 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
50	ST. Mary'S Native Corporation 2 awardees, including Smnc Solutions, LLC and Smnc Properties LLC Top agencies Commerce (Department of Commerce)	$2,802,779	0.2%	Rank history: not on the FY2021 list, #52 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
51	Shore Watch Construction Services, LLC Top agencies DHS (Department of Homeland Security)	$2,797,219	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
52	Ajanta Consulting LLC Top agencies Army (Department of the Army)	$2,655,884	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
53	GMB Inc. Top agencies Navy (Department of the Navy)	$2,620,171	0.2%	Rank history: #65 in FY2021, #64 in FY2022, #59 in FY2024 and #64 in FY2025; up 11 since FY2022.
54	Pride Industries Top agencies Army (Department of the Army)	$2,603,008	0.2%	Rank history: not on the FY2021 list, #37 in FY2022, #44 in FY2024 and #52 in FY2025; down 17 since FY2022.
55	Teya Frawner JV LLC Top agencies USAF (Department of the Air Force)	$2,564,895	0.2%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2024 and not on the FY2025 list; up 143 since FY2022.
56	Tetra Tech, Inc. Top agencies Army (Department of the Army)	$2,523,493	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
57	Re-Engineered Business Solutions, Inc. Top agencies Army (Department of the Army)	$2,465,924	0.2%	Rank history: #40 in FY2021, #48 in FY2022, #55 in FY2024 and #51 in FY2025; down 9 since FY2022.
58	Bristol Prime Contractors, LLC Top agencies USAF (Department of the Air Force)	$2,458,631	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
59	Arthur'S Enterprises Inc. Through State Electric Supply Co Top agencies DOJ (Department of Justice)	$2,458,237	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 164 since FY2022.
60	Swan Contracting LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$2,394,939	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
61	Peak Facility Solutions LLC Top agencies Commerce (Department of Commerce)	$2,378,477	0.2%	Rank history: #63 in FY2021, not on the FY2022 list, #45 in FY2024 and #48 in FY2025; up 98 since FY2022.
62	Ahtna, Incorporated 3 awardees, including Ahtna Global LLC, Ahtna Environmental, Inc. and Ahtna Infrastructure & Technologies LLC Top agencies Commerce (Department of Commerce) USAF (Department of the Air Force)	$2,373,600	0.2%	Rank history: #53 in FY2021, #73 in FY2022 and not on the FY2024–FY2025 lists; up 11 since FY2022.
63	CAS FSE JV LLC Top agencies Army (Department of the Army)	$2,352,073	0.2%	Rank history: #62 in FY2021, #72 in FY2022, #70 in FY2024 and #73 in FY2025; up 9 since FY2022.
64	Eklutna Construction & Maintenance, LLC Top agencies USAF (Department of the Air Force)	$2,299,611	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
65	Doliveira DJB JV LLC Top agencies USAF (Department of the Air Force)	$2,275,327	0.2%	Rank history: not on the FY2021 list, #40 in FY2022 and not on the FY2024–FY2025 lists; down 25 since FY2022.
66	Prestige Development Services Inc. Top agencies DHS (Department of Homeland Security)	$2,226,444	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
67	Hawaiian Native Corporation Through Aktarius LLC Top agencies Commerce (Department of Commerce) DOJ (Department of Justice)	$2,221,199	0.2%	Rank history: not on the FY2021 list, #42 in FY2022 and not on the FY2024–FY2025 lists; down 25 since FY2022.
68	Dawson Enterprises, Inc. Top agencies GSA (General Services Administration) USAF (Department of the Air Force) Navy (Department of the Navy)	$2,204,375	0.2%	Rank history: not on the FY2021 list, #27 in FY2022, #51 in FY2024 and #81 in FY2025; down 41 since FY2022.
69	Blue Construction Services LLC Top agencies Navy (Department of the Navy)	$2,114,190	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 178 since FY2022.
70	Weil Construction Inc Top agencies Navy (Department of the Navy) DOI (Department of the Interior) Commerce (Department of Commerce)	$2,114,078	0.2%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2024 and not on the FY2025 list; new.
71	LJV Development LLC Top agencies DOI (Department of the Interior)	$2,099,487	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
72	PAE Government Services Inc. Top agencies Navy (Department of the Navy)	$2,074,753	0.2%	Rank history: not on the FY2021 list, #47 in FY2022, #60 in FY2024 and not on the FY2025 list; down 25 since FY2022.
73	Industries for the Blind and Visually Impaired, Inc. Top agencies Commerce (Department of Commerce)	$2,000,000	0.2%	Rank history: #5 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
74	Qsjv, LLC Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$1,944,606	0.2%	Rank history: not on the FY2021 list, #22 in FY2022 and not on the FY2024–FY2025 lists; down 52 since FY2022.
75	Capital Brand Group LLC Top agencies Navy (Department of the Navy) Commerce (Department of Commerce)	$1,924,107	0.2%	Rank history: not on the FY2021 list, #75 in FY2022, #26 in FY2024 and #39 in FY2025; unchanged since FY2022.
76	Colorado Standby LLC Top agencies DOS (Department of State)	$1,914,658	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
77	Global Engineering & Construction, LLC Top agencies Army (Department of the Army)	$1,913,584	0.2%	Rank history: #24 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 51 since FY2022.
78	Vertiv Corporation Top agencies DOJ (Department of Justice)	$1,902,525	0.2%	Rank history: not on the FY2021 list, #60 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
79	Orcom, A Division of Ortega Companies, Inc. Top agencies DOI (Department of the Interior) Commerce (Department of Commerce)	$1,864,586	0.2%	Rank history: #22 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 54 since FY2022.
80	Professionals HIR LLC Top agencies DHS (Department of Homeland Security)	$1,851,395	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
81	Qcm, Inc. Top agencies Commerce (Department of Commerce)	$1,778,631	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 242 since FY2022.
82	T.f. Powers Construction Co Top agencies USAF (Department of the Air Force)	$1,760,414	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 400 since FY2022.
83	Semper TEK Inc Top agencies Army (Department of the Army)	$1,727,802	0.1%	Rank history: not on the FY2021 list, #21 in FY2022, #80 in FY2024 and #56 in FY2025; down 62 since FY2022.
84	Caterpillar Inc. Through Solar Turbines Incorporated Top agencies Navy (Department of the Navy)	$1,726,101	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 58 since FY2022.
85	Ridgway Valley Enterprises Inc. Top agencies DOI (Department of the Interior)	$1,695,449	0.1%	Rank history: #90 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; down 52 since FY2022.
86	Asturian-Consigli JV, LLC Top agencies Navy (Department of the Navy)	$1,544,408	0.1%	Rank history: #7 in FY2021, #58 in FY2022 and not on the FY2024–FY2025 lists; down 28 since FY2022.
87	RTX Corporation Through Noresco, LLC Top agencies Navy (Department of the Navy)	$1,529,969	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
88	Front Range Construction Inc. Top agencies Commerce (Department of Commerce)	$1,522,275	0.1%	Rank history: #49 in FY2021, not on the FY2022 list, #57 in FY2024 and #68 in FY2025; up 120 since FY2022.
89	SAF Inc. Top agencies DHS (Department of Homeland Security)	$1,502,033	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 66 since FY2022.
90	Henry General Contractors Inc Top agencies DOI (Department of the Interior) USAF (Department of the Air Force) Navy (Department of the Navy)	$1,467,684	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
91	Sindongyang Elevator Co.,Ltd Top agencies Army (Department of the Army)	$1,427,942	0.1%	Rank history: #98 in FY2021, #70 in FY2022, #89 in FY2024 and #77 in FY2025; down 21 since FY2022.
92	Consolidated Enterprises Inc. Top agencies USAF (Department of the Air Force)	$1,390,430	0.1%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2024 and not on the FY2025 list; up 264 since FY2022.
93	Addon Services LLC Top agencies Commerce (Department of Commerce)	$1,388,800	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Dsc-Emi II LLC Top agencies USAF (Department of the Air Force)	$1,386,777	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
95	Fasone Construction, Inc. Top agencies DOI (Department of the Interior)	$1,365,261	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
96	Alcon Consulting Services, LLC Top agencies Army (Department of the Army)	$1,282,934	0.1%	Rank history: not on the FY2021 list, #98 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
97	Teehee Engineering Inc. Top agencies Navy (Department of the Navy)	$1,268,925	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
98	Bluefin, LLC Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$1,258,980	0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2024 and #80 in FY2025; new.
99	Enfield Enterprises LLC Top agencies Navy (Department of the Navy)	$1,238,171	0.1%	Rank history: not on the FY2021 list, #61 in FY2022 and not on the FY2024–FY2025 lists; down 38 since FY2022.
100	Johnsondanforth, Inc. Top agencies VA (Department of Veterans Affairs)	$1,213,588	0.1%	Rank history: #52 in FY2021, #35 in FY2022 and not on the FY2024–FY2025 lists; down 65 since FY2022.

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100 of 687 contractors listed here. See the rest on GovTribe.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $1.16 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 Z1JZ contractors in FY2023?

1. ACS Actividades DE Construccion Y Servicios SA ($389M), 2. Jacobs Engineering Group Inc. ($75.3M), 3. Chugach Alaska Corporation ($47.1M), 4. Nelson Refrigeration Inc. ($34.8M), 5. J & J Maintenance Inc. ($28.3M), 6. Union Station Venture, Ltd. ($28.1M), 7. Herman Construction Group, Inc. ($27.9M), 8. Action Facilities Management Inc. ($24.3M), 9. Facility Services Management, Inc. ($23M), 10. Hensel Phelps - Shimizu JV ($19.2M).

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