Top 100 Contractors in PSC Z2: Maintenance, Alteration, Repair Nonbuildings, FY2025

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 15% of FY2025 PSC Z2 contract dollars

Ranking facts

Contract obligations
$14,248,060,310 Net of deobligations, by contracts coded PSC Z2 or a code under it
Contractors
3,800 Parent companies with an obligation
Largest contractor
Tpc-Nan A Joint Venture $576 million, 3.8% of obligations
Data as of

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
Tpc-Nan A Joint Venture
Top agencies
$576,073,022
Rank history: not on the FY2021–FY2024 lists; new.
2
B.l. Harbert Holdings, L.L.C. Through BL Harbert International LLC
Top agencies
$262,014,866
Rank history: #50 in FY2021 and not on the FY2022–FY2024 lists; returned.
3
RQ Construction, LLC
Top agencies
$249,242,373
Rank history: not on the FY2021–FY2022 lists, #6 in FY2023 and #6 in FY2024; up 3 since FY2024.
4
Nan Inc.
Top agencies
$241,655,680
Rank history: not on the FY2021 list, #28 in FY2022, #33 in FY2023 and #61 in FY2024; up 57 since FY2024.
5
NW Construction, Inc.
Top agencies
$225,853,813
Rank history: not on the FY2021 list, #10 in FY2022, #30 in FY2023 and #11 in FY2024; up 6 since FY2024.
6
Kiewit-Alberici Siop Macc AJV
Top agencies
$225,700,000
Rank history: not on the FY2021–FY2022 lists, #3 in FY2023 and not on the FY2024 list; returned.
7
Bristol Bay Native Corporation 33 awardees, including SES Electrical LLC, CCI Prime Contractors LLC and Herman Construction Group, Inc.
Top agencies
$147,877,611
Rank history: #40 in FY2021, not on the FY2022 list, #55 in FY2023 and not on the FY2024 list; up 99 since FY2024.
8
Hawaii Harbors Constructors JV
Top agencies
$136,343,281
Rank history: not on the FY2021–FY2024 lists; new.
9
Sauer Construction LLC
Top agencies
$123,624,655
Rank history: not on the FY2021–FY2024 lists; new.
10
Sea PAC Engineering Inc
Top agencies
$122,887,770
Rank history: not on the FY2021–FY2022 lists, #61 in FY2023 and #45 in FY2024; up 35 since FY2024.
11
Nippo Corporation
Top agencies
$122,249,165
Rank history: not on the FY2021–FY2024 lists; up 101 since FY2024.
12
Structsure Projects Inc.
Top agencies
$112,252,751
Rank history: not on the FY2021–FY2022 lists, #4 in FY2023 and #17 in FY2024; up 5 since FY2024.
13
Ames Construction, Inc. 2 awardees, including Ames Federal Contracting Group LLC
Top agencies
$112,126,151
Rank history: #91 in FY2021 and not on the FY2022–FY2024 lists; returned.
14
American Engineering Corporation
Top agencies
$105,703,668
Rank history: #12 in FY2021, #14 in FY2022, #11 in FY2023 and #5 in FY2024; down 9 since FY2024.
15
Head / Diaz 2022
Top agencies
$101,154,199
Rank history: not on the FY2021–FY2024 lists; new.
16
Tutor Perini Corporation Through Perini Management Services, Inc.
Top agencies
$100,616,606
Rank history: not on the FY2021–FY2024 lists; new.
17
J & J Maintenance Inc. 3 awardees, including JSK Diego Services LLC and J&J Germany GMBH
Top agencies
$98,726,362
Rank history: not on the FY2021–FY2024 lists; up 313 since FY2024.
18
Weston Solutions Holdings Inc Through Weston Solutions Inc.
Top agencies
$88,140,648
Rank history: not on the FY2021–FY2024 lists; new.
19
Barnard Construction Company, Incorporated
Top agencies
$87,922,159
Rank history: not on the FY2021 list, #8 in FY2022 and not on the FY2023–FY2024 lists; up 86 since FY2024.
20
Hcpa-Garco JV1
Top agencies
$85,650,000
Rank history: not on the FY2021–FY2024 lists; new.
21
Environmental Chemical Corporation 5 awardees, including Contrack ECC LLC, ECC Diego Garcia LLC and Environmental Chemical Corporation Italy S.R.L.
Top agencies
$82,277,991
Rank history: not on the FY2021 list, #7 in FY2022, #45 in FY2023 and not on the FY2024 list; up 144 since FY2024.
22
Emr, Inc.
Top agencies
$79,132,185
Rank history: not on the FY2021–FY2024 lists; up 95 since FY2024.
23
Honeywell International Inc. 2 awardees, including Honeywell Building Solutions SES Corp
Top agencies
$77,561,667
Rank history: #14 in FY2021, #19 in FY2022, #21 in FY2023 and not on the FY2024 list; returned.
24
Olgoonik Corporation 8 awardees, including Olgoonik Enterprises, LLC, Olgoonik Logistics, LLC and Olgoonik Construction Services LLC
Top agencies
$77,189,323
Rank history: not on the FY2021–FY2024 lists; new.
25
Hensel Phelps Construction Co 3 awardees
Top agencies
$75,541,720
Rank history: #3 in FY2021, #6 in FY2022, #38 in FY2023 and #30 in FY2024; up 5 since FY2024.
26
Bering Straits Native Corporation 10 awardees, including Stampede Ventures, Inc., Bering Straits Global Innovations, LLC and Bering Straits Development Co.
Top agencies
$75,246,135
Rank history: #38 in FY2021, #92 in FY2022, #67 in FY2023 and #71 in FY2024; up 45 since FY2024.
27
Insight Pacific, LLC
Top agencies
$70,484,041
Rank history: not on the FY2021 list, #31 in FY2022, #43 in FY2023 and not on the FY2024 list; up 81 since FY2024.
28
Clark Construction Group LLC Through Clark Construction Group - California, LP
Top agencies
$68,408,704
Rank history: not on the FY2021–FY2024 lists; new.
29
General Electric Company Through GE Renewables US LLC
Top agencies
$60,436,934
Rank history: #82 in FY2021, not on the FY2022–FY2023 lists and #78 in FY2024; up 49 since FY2024.
30
Nova Group, Inc.
Top agencies
$57,431,076
Rank history: not on the FY2021–FY2024 lists; new.
31
Dawson Enterprises, Inc.
Top agencies
$57,225,766
Rank history: #28 in FY2021, #48 in FY2022, #42 in FY2023 and not on the FY2024 list; up 200 since FY2024.
32
Southeastern Industrial Barlovento JV Through Southeastern Industrial Barlovento Jv-2, LLC
Top agencies
$55,254,644
Rank history: not on the FY2021–FY2024 lists; new.
33
Modern International Inc.
Top agencies
$54,867,077
Rank history: not on the FY2021–FY2024 lists; up 392 since FY2024.
34
Atkins Nuclear Secured Holdings Corporation Through Isotek Systems, LLC
Top agencies
$54,068,923
Rank history: not on the FY2021–FY2023 lists and #29 in FY2024; down 5 since FY2024.
35
Sedona-Nasco Jv2, LLC
Top agencies
$50,356,077
Rank history: not on the FY2021–FY2023 lists and #42 in FY2024; up 7 since FY2024.
36
WSP USA Environment & Infrastructure Inc.
Top agencies
$49,723,323
Rank history: not on the FY2021–FY2024 lists; new.
37
Absher Construction Co 2 awardees, including Jabez-Absher Small Business Joint Venture
Top agencies
$48,693,400
Rank history: not on the FY2021–FY2024 lists; new.
38
Kekolu Contracting, LLC
Top agencies
$48,413,434
Rank history: not on the FY2021–FY2023 lists and #74 in FY2024; up 36 since FY2024.
39
International Towers LLC
Top agencies
$48,168,743
Rank history: not on the FY2021–FY2024 lists; new.
40
Native American Services Corp.
Top agencies
$47,445,663
Rank history: not on the FY2021–FY2024 lists; up 84 since FY2024.
41
Murnane Building Contractors, Inc.
Top agencies
$47,195,000
Rank history: not on the FY2021–FY2024 lists; new.
42
Pacific Rim Constructors Inc.
Top agencies
$47,024,523
Rank history: not on the FY2021–FY2024 lists; new.
43
Bridger Richard JV LLC
Top agencies
$46,999,616
Rank history: not on the FY2021–FY2024 lists; new.
44
V2X, Inc. 2 awardees, including Vectrus Federal Services GMBH and V2X Systems LLC
Top agencies
$45,583,731
Rank history: not on the FY2021–FY2024 lists; new.
45
Serrano Construction and Development Corp.
Top agencies
$44,608,232
Rank history: not on the FY2021–FY2024 lists; up 148 since FY2024.
46
Swank Enterprises, Inc.
Top agencies
$44,289,144
Rank history: not on the FY2021–FY2024 lists; new.
47
Constellis, LLC 4 awardees, including Centerra Integrated Facilities Services, LLC, Centerra Integrated Services, LLC and Centerra Construction Partners LLC
Top agencies
$44,094,417
Rank history: not on the FY2021–FY2024 lists; new.
48
Doyon Management Services, LLC
Top agencies
$44,056,504
Rank history: not on the FY2021–FY2023 lists and #23 in FY2024; down 25 since FY2024.
49
Chickasaw Nation Through Chickasaw Defense Group, LLC
Top agencies
$43,497,604
Rank history: not on the FY2021–FY2024 lists; new.
50
Hurley JV, LLP
Top agencies
$43,319,739
Rank history: not on the FY2021–FY2024 lists; up 77 since FY2024.
51
Facility Services Management, Inc.
Top agencies
$43,230,403
Rank history: not on the FY2021–FY2024 lists; new.
52
Porr Government Services GMBH 5 awardees, including Centennial Contractors Enterprises, Inc., Porr Government Services Italy SRL and Porr Government Services Benelux
Top agencies
$42,266,194
Rank history: not on the FY2021–FY2024 lists; new.
53
Techni-Con, Inc.
Top agencies
$41,720,034
Rank history: not on the FY2021–FY2024 lists; up 94 since FY2024.
54
Benaka, Inc.
Top agencies
$41,275,723
Rank history: not on the FY2021 list, #87 in FY2022 and not on the FY2023–FY2024 lists; up 210 since FY2024.
55
The Whiting-Turner Contracting Company
Top agencies
$41,151,991
Rank history: #96 in FY2021, #17 in FY2022, #2 in FY2023 and #15 in FY2024; down 40 since FY2024.
56
Lead Builders Inc.
Top agencies
$40,750,766
Rank history: not on the FY2021–FY2024 lists; up 78 since FY2024.
57
Glen / Mar Construction, Inc. 2 awardees, including Glen Mar-Hensel Phelps
Top agencies
$40,544,951
Rank history: not on the FY2021–FY2024 lists; new.
58
Onsite Construction Group LLC
Top agencies
$40,366,887
Rank history: not on the FY2021–FY2024 lists; up 221 since FY2024.
59
Grunley Construction Co., Inc.
Top agencies
$39,769,929
Rank history: #41 in FY2021, not on the FY2022 list, #7 in FY2023 and #13 in FY2024; down 46 since FY2024.
60
Military & Federal Construction Co., Inc.
Top agencies
$39,569,676
Rank history: not on the FY2021 list, #72 in FY2022, #72 in FY2023 and not on the FY2024 list; returned.
61
Etolin Strait Associates LLC
Top agencies
$39,206,071
Rank history: not on the FY2021–FY2024 lists; up 205 since FY2024.
62
SKE & VFS JV
Top agencies
$38,646,293
Rank history: not on the FY2021–FY2024 lists; new.
63
Calista Corp 6 awardees, including Brice Builders, LLC, Brice Integrated LLC and Stg, Inc.
Top agencies
$36,697,352
Rank history: not on the FY2021–FY2024 lists; new.
64
Outside Box LLC
Top agencies
$36,534,961
Rank history: not on the FY2021–FY2024 lists; new.
65
Triton Marine Construction Corp.
Top agencies
$36,224,246
Rank history: not on the FY2021–FY2024 lists; up 310 since FY2024.
66
Fargo Pacific Inc.
Top agencies
$36,175,447
Rank history: not on the FY2021–FY2023 lists and #46 in FY2024; down 20 since FY2024.
67
RHI LLC
Top agencies
$36,012,611
Rank history: not on the FY2021–FY2024 lists; up 254 since FY2024.
68
Harper Construction Company Inc.
Top agencies
$35,507,977
Rank history: not on the FY2021–FY2024 lists; new.
69
Environet Inc.
Top agencies
$35,368,871
Rank history: not on the FY2021–FY2024 lists; up 231 since FY2024.
70
Great Lakes Dredge & Dock Corporation 2 awardees, including Forgen LLC
Top agencies
$34,880,000
Rank history: not on the FY2021 list, #79 in FY2022 and not on the FY2023–FY2024 lists; returned.
71
Medvolt - Roundhouse JV
Top agencies
$34,316,195
Rank history: not on the FY2021–FY2024 lists; new.
72
Infratech International, LLC
Top agencies
$34,252,879
Rank history: not on the FY2021–FY2024 lists; up 111 since FY2024.
73
OCI Overseas Holding Limited Through Contrack Watts Inc.
Top agencies
$34,161,379
Rank history: not on the FY2021–FY2024 lists; up 30 since FY2024.
74
Guidehouse Inc. Through Aptim Federal Services, LLC
Top agencies
$33,639,006
Rank history: not on the FY2021–FY2023 lists and #14 in FY2024; down 60 since FY2024.
75
Mckenzie Construction & Site Development LLC
Top agencies
$33,411,627
Rank history: not on the FY2021–FY2024 lists; up 45 since FY2024.
76
Utility Systems Solutions, Inc.
Top agencies
$33,215,383
Rank history: not on the FY2021–FY2024 lists; new.
77
J G Contracting
Top agencies
$32,942,362
Rank history: not on the FY2021–FY2024 lists; up 59 since FY2024.
78
Firelake Construction Inc.
Top agencies
$32,827,869
Rank history: not on the FY2021–FY2024 lists; up 339 since FY2024.
79
New Dominion Construction LLC
Top agencies
$32,170,578
Rank history: not on the FY2021–FY2024 lists; up 150 since FY2024.
80
Shape Construction Inc
Top agencies
$31,837,032
Rank history: not on the FY2021–FY2024 lists; up 215 since FY2024.
81
Healtheon, Inc.
Top agencies
$31,812,436
Rank history: not on the FY2021–FY2024 lists; up 245 since FY2024.
82
Ameresco Inc. 2 awardees, including Ameresco Select, Inc.
Top agencies
$31,635,535
Rank history: #42 in FY2021, #90 in FY2022, #64 in FY2023 and not on the FY2024 list; up 43 since FY2024.
83
Mig Gov, LLC
Top agencies
$31,631,977
Rank history: not on the FY2021–FY2024 lists; up 69 since FY2024.
84
Port Madison Construction Corporation
Top agencies
$31,073,742
Rank history: not on the FY2021–FY2024 lists; up 106 since FY2024.
85
P & S Construction Inc.
Top agencies
$30,968,964
Rank history: not on the FY2021–FY2024 lists; up 43 since FY2024.
86
JBW Group LLC
Top agencies
$30,652,102
Rank history: not on the FY2021–FY2023 lists and #88 in FY2024; up 2 since FY2024.
87
Ciri Development Corporation 6 awardees, including North Wind General Contractors LLC, Silver Mountain Construction LLC and Weldin Construction LLC
Top agencies
$30,086,509
Rank history: not on the FY2021–FY2024 lists; new.
88
DTS P&L JV2
Top agencies
$30,051,073
Rank history: not on the FY2021–FY2024 lists; up 193 since FY2024.
89
HDD JV
Top agencies
$29,803,779
Rank history: not on the FY2021–FY2024 lists; new.
90
Chugach Government Solutions, LLC 5 awardees, including Chugach Solutions Enterprise, LLC, Chugach Intelligence Solutions, LLC and Chugach Consolidated Solutions, LLC
Top agencies
$29,304,033
Rank history: not on the FY2021–FY2024 lists; up 256 since FY2024.
91
Spectrum Solutions Inc.
Top agencies
$29,193,007
Rank history: not on the FY2021–FY2024 lists; new.
92
The Chenega Corporation 7 awardees, including Chenega Reliable Services LLC, Chenega Mission Operations, LLC and Ajanta Consulting LLC
Top agencies
$29,149,993
Rank history: not on the FY2021–FY2024 lists; new.
93
Elevated Technologies Services, LLC
Top agencies
$29,073,406
Rank history: not on the FY2021–FY2024 lists; new.
94
S.b. Ballard Construction Company
Top agencies
$28,233,972
Rank history: not on the FY2021–FY2024 lists; new.
95
Ukpeagvik Inupiat Corporation 3 awardees, including Northbank Civil and Marine, LLC and HC Contractors, LLC
Top agencies
$28,024,505
Rank history: not on the FY2021–FY2024 lists; new.
96
Mcmillen, Inc.
Top agencies
$27,747,719
Rank history: not on the FY2021–FY2024 lists; new.
97
Gana-A' Yoo, Limited 4 awardees, including Gana-A'yoo Construction Services JV, LLC, Khotol Services Corporation and Yukon Management, LLC
Top agencies
$27,675,849
Rank history: not on the FY2021–FY2024 lists; new.
98
SU-MO Builders Inc.
Top agencies
$27,601,813
Rank history: not on the FY2021–FY2023 lists and #36 in FY2024; down 62 since FY2024.
99
JM Construction Services Inc.
Top agencies
$27,480,017
Rank history: not on the FY2021–FY2024 lists; new.
100
Toda-Nudp JV
Top agencies
$27,232,463
Rank history: not on the FY2021–FY2024 lists; new.
Show 75 more

100 of 3,800 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 $2,853,663,867 Hcpa-Garco JV1
Z2AA Repair or Alteration of Office Buildings $1,654,719,079 Honeywell International Inc.
Z2PZ Repair or Alteration of Other Non-Building Facilities $1,221,038,575 Tpc-Nan A Joint Venture
Z2DA Repair or Alteration of Hospitals and Infirmaries $1,070,461,504 Structsure Projects Inc.
Z2AZ Repair or Alteration of Other Administrative Facilities and Service Buildings $842,018,591 B.l. Harbert Holdings, L.L.C.
Z2KA Repair or Alteration of Dams $822,288,412 NW Construction, Inc.
Z2FC Repair or Alteration of Troop Housing Facilities $597,228,707 Sea PAC Engineering Inc
Z2NA Repair or Alteration of Fuel Supply Facilities $504,880,654 Weston Solutions Holdings Inc
Z2QA Repair or Alteration of Restoration of Real Property (Public or Private) $454,652,288 Sedona-Nasco Jv2, LLC
Z2LB Repair or Alteration of Highways/Roads/Streets/Bridges/Railways $436,806,771 Mckenzie Construction & Site Development LLC
Z2NZ Repair or Alteration of Other Utilities $431,423,651 Sauer Construction LLC
Z2ED Repair or Alteration of Ship Construction and Repair Facilities $379,124,816 Kiewit-Alberici Siop Macc AJV
Z2BD Repair or Alteration of Airport Runways and Taxiways $356,210,853 Head / Diaz 2022
Z2NE Repair or Alteration of Water Supply Facilities $206,259,931 Nan Inc.
Z2BZ Repair or Alteration of Other Airfield Structures $189,417,082 RQ Construction, LLC
Z2FA Repair or Alteration of Family Housing Facilities $184,690,681 Nippo Corporation
Z2CZ Repair or Alteration of Other Educational Buildings $182,759,718 RQ Construction, LLC
Z2EB Repair or Alteration of Maintenance Buildings $155,005,467 Dawson Enterprises, Inc.
Z2EZ Repair or Alteration of Other Industrial Buildings $114,127,401 Bristol Bay Native Corporation
Z2DZ Repair or Alteration of Other Hospital Buildings $108,565,436 S.b. Ballard Construction Company
Z2GZ Repair or Alteration of Other Warehouse Buildings $108,192,615 International Towers LLC
Z2FB Repair or Alteration of Recreational Buildings $102,736,412 Insight Pacific, LLC
Z2EA Repair or Alteration of Ammunition Facilities $100,597,481 Chickasaw Nation
Z2KZ Repair or Alteration of Other Conservation and Development Facilities $95,565,833 Ameresco Inc.
Z2FZ Repair or Alteration of Other Residential Buildings $88,050,025 Nippo Corporation
Z2PD Repair or Alteration of Waste Treatment and Storage Facilities $74,501,045 Tutor Perini Corporation
Z2PA Repair or Alteration of Recreation Facilities (Non-Building) $66,713,608 EC Praus LLC
Z2FF Repair or Alteration of Penal Facilities $66,513,847 Utility Systems Solutions, Inc.
Z2ND Repair or Alteration of Sewage and Waste Facilities $63,596,014 JBW Group LLC
Z2NB Repair or Alteration of Heating and Cooling Plants $58,022,726 Sgjv, LLC
Z2EC Repair or Alteration of Production Buildings $53,544,401 Dmyles Inc.
Z2BG Repair or Alteration of Electronic and Communications Facilities $48,755,449 Framaco-Bozdemir Joint Venture LLC
Z2JA Repair or Alteration of Museums and Exhibition Buildings $41,814,039 Stone & Lime Imports, Inc.
Z2FD Repair or Alteration of Dining Facilities $40,174,274 Grunley Construction Co., Inc.
Z2BC Repair or Alteration of Radar and Navigational Facilities $38,415,441 Ahtna Infrastructure & Technologies LLC
Z2LZ Repair or Alteration of Parking Facilities $38,319,571 HDD JV
Z2CA Repair or Alteration of Schools $28,562,859 Per-Geesh TLI JV, LLC
Z2DB Repair or Alteration of Laboratories and Clinics $20,477,434 Red Bison Services, LLC
Z2AB Repair or Alteration of Conference Space and Facilities $11,188,113 I.e.-Pacific, Inc.
Z2BA Repair or Alteration of Air Traffic Control Towers $8,124,503 BBA Construction LLC
Show all 40

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 $15.1 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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 FY2025?

1. Tpc-Nan A Joint Venture ($576M), 2. B.l. Harbert Holdings, L.L.C. ($262M), 3. RQ Construction, LLC ($249M), 4. Nan Inc. ($242M), 5. NW Construction, Inc. ($226M), 6. Kiewit-Alberici Siop Macc AJV ($226M), 7. Bristol Bay Native Corporation ($148M), 8. Hawaii Harbors Constructors JV ($136M), 9. Sauer Construction LLC ($124M), 10. Sea PAC Engineering Inc ($123M).

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