Top 100 Department of the Interior Contractors, FY2023

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Stronghold Engineering Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 237130 Power and Communication Line and Related Structures Construction 238210 Electrical Contractors and Other Wiring Installation Contractors	$212,394,162	3.5%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #10 in FY2025; new.
2	Cherokee Nation 6 awardees, including Cherokee CRC LLC, Cherokee Nation Management & Consulting, L.l.c.. and Cherokee Federal Solutions, L.L.C. Top NAICS codes 236220 Commercial and Institutional Building Construction 238910 Site Preparation Contractors 541513 Computer Facilities Management Services	$181,236,606	3.0%	Rank history: #6 in FY2021, #14 in FY2022, not on the FY2024 list and #78 in FY2025; up 12 since FY2022.
3	The Cianbro Companies Through Cianbro Corporation Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$112,760,000	1.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
4	Sealaska Corporation 2 awardees, including Sealaska Constructors LLC and Managed Business Solutions LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 541690 Other Scientific and Technical Consulting Services 541519 Other Computer Related Services	$100,149,843	1.6%	Rank history: #11 in FY2021, #9 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
5	S.j. Louis Construction, Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction	$67,314,613	1.1%	Rank history: not on the FY2021 list, #5 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
6	Kbr, Inc. 4 awardees, including KBR Wyle Services, LLC Top NAICS codes 541513 Computer Facilities Management Services 811219 Other Electronic and Precision Equipment Repair and Maintenance 541511 Custom Computer Programming Services	$66,118,028	1.1%	Rank history: #2 in FY2021, #6 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
7	Komada LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$58,335,000	1.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
8	BWI Tpc, A Joint Venture Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$56,854,529	0.9%	Rank history: not on the FY2021 list, #1 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
9	NW Construction, Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$54,748,917	0.9%	Rank history: not on the FY2021 list, #2 in FY2022, #5 in FY2024 and #1 in FY2025; down 7 since FY2022.
10	Consigli Holdings Inc. Through Consigli Construction Co., Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 237990 Other Heavy and Civil Engineering Construction	$49,820,616	0.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
11	Tutor Perini Corporation 2 awardees, including Perini Management Services, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 238290 Other Building Equipment Contractors 541330 Engineering Services	$49,377,414	0.8%	Rank history: #58 in FY2021, #16 in FY2022, #10 in FY2024 and not on the FY2025 list; up 5 since FY2022.
12	RBA Group the Through NV5 Geospatial, Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services 541370 Surveying and Mapping (except Geophysical) Services	$45,805,442	0.7%	Rank history: #8 in FY2021, #10 in FY2022, not on the FY2024 list and #19 in FY2025; down 2 since FY2022.
13	Countertrade Products, Inc. Top NAICS codes 334111 Electronic Computer Manufacturing 541519 Other Computer Related Services 334118 Computer Terminal and Other Computer Peripheral Equipment Manufacturing	$43,887,090	0.7%	Rank history: #13 in FY2021, #11 in FY2022, #11 in FY2024 and #28 in FY2025; down 2 since FY2022.
14	Accenture Inc. Through Accenture Federal Services LLC Top NAICS codes 541519 Other Computer Related Services 541512 Computer Systems Design Services	$41,469,955	0.7%	Rank history: not on the FY2021 list, #42 in FY2022 and not on the FY2024–FY2025 lists; up 28 since FY2022.
15	Planet Technologies, Inc. Top NAICS codes 541519 Other Computer Related Services	$37,763,617	0.6%	Rank history: #48 in FY2021, #17 in FY2022, #12 in FY2024 and #14 in FY2025; up 2 since FY2022.
16	The Walsh Group Through Archer Western Construction, LLC Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction	$35,562,597	0.6%	Rank history: #30 in FY2021, #7 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
17	Andritz AG Through Andritz Hydro Corp Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 238990 All Other Specialty Trade Contractors 333611 Turbine and Turbine Generator Set Units Manufacturing	$34,473,301	0.6%	Rank history: #60 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 230 since FY2022.
18	Louis C. Allegrone, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 238140 Masonry Contractors	$33,879,319	0.6%	Rank history: not on the FY2021 list, #24 in FY2022 and not on the FY2024–FY2025 lists; up 6 since FY2022.
19	Verizon Communications Inc. 6 awardees, including Verizon Business Network Services LLC, Cellco Partnership and Verizon Connect NWF Inc. Top NAICS codes 517110 Wired Telecommunications Carriers 541519 Other Computer Related Services 517312 Wireless Telecommunications Carriers (except Satellite)	$32,686,922	0.5%	Rank history: #22 in FY2021, #39 in FY2022 and not on the FY2024–FY2025 lists; up 20 since FY2022.
20	Nickerson & O'day, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$32,680,126	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
21	Ldss, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$31,966,023	0.5%	Rank history: #25 in FY2021, #21 in FY2022, #21 in FY2024 and not on the FY2025 list; unchanged since FY2022.
22	Asrc Consulting & Environmental Services LLC Top NAICS codes 562910 Remediation Services 213112 Support Activities for Oil and Gas Operations	$31,444,275	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
23	Blue World Construction Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 238330 Flooring Contractors 237310 Highway, Street, and Bridge Construction	$30,910,368	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
24	Hensel Phelps - Shimizu JV 2 awardees, including Hensel Phelps Construction Co. Top NAICS codes 236220 Commercial and Institutional Building Construction	$30,575,158	0.5%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2024 and not on the FY2025 list; new.
25	Stone & Lime Imports, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 237990 Other Heavy and Civil Engineering Construction	$30,108,504	0.5%	Rank history: #82 in FY2021, #41 in FY2022, not on the FY2024 list and #29 in FY2025; up 16 since FY2022.
26	ERA Helicopters LLC Through Bristow LLC Top NAICS codes 481211 Nonscheduled Chartered Passenger Air Transportation	$29,266,161	0.5%	Rank history: #9 in FY2021, #22 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
27	Pate Construction Co., Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction	$27,216,950	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
28	CACI International Inc. 3 awardees, including Caci, Inc. - Federal and Caci Nss, LLC Top NAICS codes 541519 Other Computer Related Services	$27,160,715	0.4%	Rank history: #20 in FY2021, not on the FY2022 list, #41 in FY2024 and #37 in FY2025; returned.
29	Jacobs Government Services Company Top NAICS codes 541330 Engineering Services	$27,157,625	0.4%	Rank history: #35 in FY2021, #66 in FY2022 and not on the FY2024–FY2025 lists; up 37 since FY2022.
30	Hdr, Inc. 7 awardees, including HDR Engineering, Inc., HDR Environmental, Operations and Construction, Inc. and HDR Schnabel Reclamation Joint Venture Top NAICS codes 541330 Engineering Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541310 Architectural Services	$25,934,556	0.4%	Rank history: #43 in FY2021, #18 in FY2022, #35 in FY2024 and #74 in FY2025; down 12 since FY2022.
31	Structural Group, Inc. Through Pullman Sst, Inc. Top NAICS codes 238150 Glass and Glazing Contractors	$25,846,615	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
32	Smartronix LLC Top NAICS codes 541519 Other Computer Related Services	$25,702,488	0.4%	Rank history: #28 in FY2021, #29 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
33	CGI Technologies and Solutions Inc. Through CGI Federal Inc. Top NAICS codes 541511 Custom Computer Programming Services 541519 Other Computer Related Services	$25,651,337	0.4%	Rank history: #34 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; up 10 since FY2022.
34	General Dynamics Corporation 4 awardees, including General Dynamics Mission Systems, Inc., General Dynamics Information Technology, Inc. and General Dynamics - Ots, Inc. Top NAICS codes 541330 Engineering Services 541519 Other Computer Related Services 334290 Other Communications Equipment Manufacturing	$25,380,954	0.4%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2024 and #64 in FY2025; up 75 since FY2022.
35	Tarlton Corp Top NAICS codes 236220 Commercial and Institutional Building Construction	$25,347,099	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
36	Hpm, Inc. Top NAICS codes 236117 New Housing For-Sale Builders 237110 Water and Sewer Line and Related Structures Construction 236220 Commercial and Institutional Building Construction	$24,731,495	0.4%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #51 in FY2025; up 71 since FY2022.
37	JMG Constructors LLC Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 236220 Commercial and Institutional Building Construction 237990 Other Heavy and Civil Engineering Construction	$23,701,052	0.4%	Rank history: #55 in FY2021, #92 in FY2022 and not on the FY2024–FY2025 lists; up 55 since FY2022.
38	The Dewberry Companies LC Through Dewberry Engineers Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services 541620 Environmental Consulting Services 541370 Surveying and Mapping (except Geophysical) Services	$23,582,557	0.4%	Rank history: #47 in FY2021, #37 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
39	The Bedwell Company Top NAICS codes 236220 Commercial and Institutional Building Construction	$22,264,373	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
40	Arctic Slope Regional Corporation 3 awardees, including Vistronix, LLC, EQM Services, LLC and Asrc Federal Data Solutions, LLC Top NAICS codes 541519 Other Computer Related Services 238910 Site Preparation Contractors 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$22,243,957	0.4%	Rank history: #5 in FY2021, #33 in FY2022, #68 in FY2024 and #18 in FY2025; down 7 since FY2022.
41	AMG & Associates Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$22,177,565	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
42	Garco Construction, Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$22,011,605	0.4%	Rank history: #27 in FY2021, #38 in FY2022, #50 in FY2024 and #32 in FY2025; down 4 since FY2022.
43	Classic Site Solutions Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 237990 Other Heavy and Civil Engineering Construction 238910 Site Preparation Contractors	$21,972,968	0.4%	Rank history: #92 in FY2021, #50 in FY2022, #98 in FY2024 and not on the FY2025 list; up 7 since FY2022.
44	Weeminuche Construction Authority Through WCA Construction, LLC Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 237310 Highway, Street, and Bridge Construction	$21,334,258	0.3%	Rank history: not on the FY2021 list, #20 in FY2022 and not on the FY2024–FY2025 lists; down 24 since FY2022.
45	Outside the Box LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 238990 All Other Specialty Trade Contractors 541720 Research and Development in the Social Sciences and Humanities	$21,217,535	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 358 since FY2022.
46	Nationwide It Services Inc. Top NAICS codes 541512 Computer Systems Design Services 541519 Other Computer Related Services	$21,203,789	0.3%	Rank history: #73 in FY2021, #34 in FY2022, #37 in FY2024 and #57 in FY2025; down 12 since FY2022.
47	Terra Site Constructors LLC Top NAICS codes 237310 Highway, Street, and Bridge Construction 237990 Other Heavy and Civil Engineering Construction 238910 Site Preparation Contractors	$21,063,014	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 334 since FY2022.
48	Nuaxis LLC Top NAICS codes 541519 Other Computer Related Services 541512 Computer Systems Design Services	$20,993,612	0.3%	Rank history: #19 in FY2021, #31 in FY2022, #22 in FY2024 and #63 in FY2025; down 17 since FY2022.
49	Goshawk, LLC Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 333318 Other Commercial and Service Industry Machinery Manufacturing	$20,918,295	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 85 since FY2022.
50	Dell Federal Systems L.P. 2 awardees, including Dell Marketing L.P. Top NAICS codes 511210 Software Publishers 334111 Electronic Computer Manufacturing 513210 Software Publishers	$20,062,460	0.3%	Rank history: #14 in FY2021, #48 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
51	Nexgen Technologies Inc. Top NAICS codes 541511 Custom Computer Programming Services 541513 Computer Facilities Management Services	$19,164,307	0.3%	Rank history: #42 in FY2021, #40 in FY2022, #51 in FY2024 and #60 in FY2025; down 11 since FY2022.
52	Lumen Technologies, Inc. 7 awardees, including Lumen Technologies Government Solutions, Inc., Centurylink Communications, LLC and Level 3 Communications, LLC Top NAICS codes 517110 Wired Telecommunications Carriers 517111 Wired Telecommunications Carriers 517112 Wireless Telecommunications Carriers (except Satellite)	$18,633,574	0.3%	Rank history: #23 in FY2021, not on the FY2022 list, #18 in FY2024 and #12 in FY2025; up 154 since FY2022.
53	Koniag, Inc. 4 awardees, including Tuknik Government Services LLC, Kadiak LLC and Arlluk Technology Solutions LLC Top NAICS codes 541519 Other Computer Related Services 541511 Custom Computer Programming Services 541611 Administrative Management and General Management Consulting Services	$18,283,719	0.3%	Rank history: not on the FY2021 list, #69 in FY2022, not on the FY2024 list and #95 in FY2025; up 16 since FY2022.
54	Government of the United States 6 awardees, including Uchicago Argonne, LLC and Federal Prison Industries, Inc. Top NAICS codes 337214 Office Furniture (except Wood) Manufacturing 238220 Plumbing, Heating, and Air-Conditioning Contractors 238390 Other Building Finishing Contractors	$18,106,363	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
55	The Texas A&M University System 5 awardees, including Texas A & M University Kingsville, Texas A&M Agrilife Research and Texas A & M University Top NAICS codes 813312 Environment, Conservation and Wildlife Organizations 541690 Other Scientific and Technical Consulting Services 541380 Testing Laboratories and Services	$17,594,353	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
56	Ciri Development Corporation 4 awardees, including North Wind Construction Services, LLC, North Wind Site Services, LLC and North Wind Resource Consulting LLC Top NAICS codes 562910 Remediation Services 541620 Environmental Consulting Services 213112 Support Activities for Oil and Gas Operations	$17,519,544	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #56 in FY2025; up 181 since FY2022.
57	Teya Enterprises LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 236220 Commercial and Institutional Building Construction	$17,346,283	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
58	Tribal TECH LLC Top NAICS codes 621112 Offices of Physicians, Mental Health Specialists 541611 Administrative Management and General Management Consulting Services 611710 Educational Support Services	$17,272,619	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
59	Goodfellow-Sun JV, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$17,254,000	0.3%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2024 and not on the FY2025 list; new.
60	Pinnacle West Capital Corporation Through Arizona Public Service Company Top NAICS codes 221122 Electric Power Distribution	$17,231,234	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
61	Guardian Construction, Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction 236116 New Multifamily Housing Construction (except For-Sale Builders) 237110 Water and Sewer Line and Related Structures Construction	$16,981,460	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #24 in FY2025; up 400 since FY2022.
62	Merrick-Surdex Joint Venture LLP Top NAICS codes 541360 Geophysical Surveying and Mapping Services	$16,922,802	0.3%	Rank history: not on the FY2021 list, #60 in FY2022, #78 in FY2024 and #44 in FY2025; down 2 since FY2022.
63	Ahtna-Unit JV LLC Top NAICS codes 236116 New Multifamily Housing Construction (except For-Sale Builders)	$16,682,601	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
64	TDX Power Services LLC Top NAICS codes 237130 Power and Communication Line and Related Structures Construction 237990 Other Heavy and Civil Engineering Construction	$16,127,147	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
65	Trace3 Government, LLC Top NAICS codes 541519 Other Computer Related Services 334111 Electronic Computer Manufacturing	$15,779,277	0.3%	Rank history: #71 in FY2021, #58 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
66	Teksynap Corporation Top NAICS codes 541512 Computer Systems Design Services	$15,548,103	0.3%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2024 and #43 in FY2025; up 423 since FY2022.
67	Regency Consulting Inc Top NAICS codes 334111 Electronic Computer Manufacturing 541519 Other Computer Related Services 511210 Software Publishers	$15,529,116	0.3%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2024 and not on the FY2025 list; up 166 since FY2022.
68	General Electric Company 4 awardees, including GE Renewables US LLC, GE Vernova Electrification Software, LLC and GE Vernova International LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 333611 Turbine and Turbine Generator Set Units Manufacturing 513210 Software Publishers	$15,469,110	0.3%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2024 and not on the FY2025 list; new.
69	Danaher Corporation 5 awardees, including OTT Hydromet Corp, Hach Company and Beckman Coulter, Inc. Top NAICS codes 334513 Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables 334519 Other Measuring and Controlling Device Manufacturing 811219 Other Electronic and Precision Equipment Repair and Maintenance	$15,437,406	0.3%	Rank history: #77 in FY2021, #90 in FY2022 and not on the FY2024–FY2025 lists; up 21 since FY2022.
70	AECOM 3 awardees, including AECOM Technical Services, Inc. and AECOM Services, LLC Top NAICS codes 541330 Engineering Services 541310 Architectural Services 541620 Environmental Consulting Services	$15,126,983	0.2%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2024 and #76 in FY2025; up 120 since FY2022.
71	Otak, Inc. Top NAICS codes 541330 Engineering Services 541990 All Other Professional, Scientific, and Technical Services 541620 Environmental Consulting Services	$15,117,287	0.2%	Rank history: #67 in FY2021, not on the FY2022 list, #55 in FY2024 and not on the FY2025 list; up 62 since FY2022.
72	Bis Services LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$14,499,103	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
73	Cherokee Nation System Solutions LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541611 Administrative Management and General Management Consulting Services 541519 Other Computer Related Services	$14,134,721	0.2%	Rank history: #57 in FY2021, #79 in FY2022 and not on the FY2024–FY2025 lists; up 6 since FY2022.
74	ICF International, Inc. Through ICF Incorporated, L.L.C. Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541620 Environmental Consulting Services	$13,891,051	0.2%	Rank history: not on the FY2021 list, #27 in FY2022 and not on the FY2024–FY2025 lists; down 47 since FY2022.
75	Carahsoft Technology Corp Top NAICS codes 511210 Software Publishers 541519 Other Computer Related Services 334111 Electronic Computer Manufacturing	$13,840,601	0.2%	Rank history: #66 in FY2021, #88 in FY2022, #90 in FY2024 and not on the FY2025 list; up 13 since FY2022.
76	Decisionpoint Corporation 2 awardees, including Emesec Incorporated Top NAICS codes 541519 Other Computer Related Services 541512 Computer Systems Design Services	$13,647,364	0.2%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2024 and not on the FY2025 list; up 28 since FY2022.
77	Federal Contracts LLC Top NAICS codes 336112 Light Truck and Utility Vehicle Manufacturing 333120 Construction Machinery Manufacturing 333111 Farm Machinery and Equipment Manufacturing	$13,633,935	0.2%	Rank history: not on the FY2021 list, #77 in FY2022, #87 in FY2024 and not on the FY2025 list; unchanged since FY2022.
78	Colossal Contracting LLC Top NAICS codes 541519 Other Computer Related Services	$13,483,987	0.2%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2024 and #79 in FY2025; up 38 since FY2022.
79	Woolpert, Inc. 2 awardees, including Geomatics Data Solutions, A Woolpert Company, LLC Top NAICS codes 541360 Geophysical Surveying and Mapping Services 541370 Surveying and Mapping (except Geophysical) Services	$13,473,560	0.2%	Rank history: #53 in FY2021, #30 in FY2022, #15 in FY2024 and #31 in FY2025; down 49 since FY2022.
80	Arctic Information Technology, Inc. Top NAICS codes 541511 Custom Computer Programming Services 541512 Computer Systems Design Services	$13,445,737	0.2%	Rank history: #41 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
81	Sierra 7 Inc Through Sierra7, Inc. Top NAICS codes 541512 Computer Systems Design Services	$13,344,852	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
82	Hartman-Walsh Corp Through Hartman-Walsh Painting Company Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 237990 Other Heavy and Civil Engineering Construction	$12,992,425	0.2%	Rank history: not on the FY2021 list, #89 in FY2022, #39 in FY2024 and #30 in FY2025; up 7 since FY2022.
83	Software Information Resource Corp Top NAICS codes 541519 Other Computer Related Services 334118 Computer Terminal and Other Computer Peripheral Equipment Manufacturing	$12,942,786	0.2%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2024 and #80 in FY2025; up 64 since FY2022.
84	Workwear Outfitters, LLC Top NAICS codes 315210 Cut and Sew Apparel Contractors	$12,800,980	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
85	Kokosing Construction Company Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$12,719,040	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
86	Nana Regional Corporation Inc 3 awardees, including Affigent, LLC and Dowl, LLC Top NAICS codes 541519 Other Computer Related Services 334210 Telephone Apparatus Manufacturing 541330 Engineering Services	$12,602,702	0.2%	Rank history: #78 in FY2021, #68 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
87	Booz Allen Hamilton Holding Corporation 2 awardees, including Booz Allen Hamilton Inc. and Aquilent, Inc. Top NAICS codes 541330 Engineering Services 541612 Human Resources Consulting Services 541519 Other Computer Related Services	$12,570,870	0.2%	Rank history: #50 in FY2021, not on the FY2022 list, #24 in FY2024 and not on the FY2025 list; up 19 since FY2022.
88	Oshkosh Corp 2 awardees, including Pierce Manufacturing Inc. Top NAICS codes 336120 Heavy Duty Truck Manufacturing	$12,389,340	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
89	Environmental Management & Planning Solutions LLC Top NAICS codes 541620 Environmental Consulting Services 541990 All Other Professional, Scientific, and Technical Services 541820 Public Relations Agencies	$12,257,486	0.2%	Rank history: #86 in FY2021, #49 in FY2022 and not on the FY2024–FY2025 lists; down 40 since FY2022.
90	Aero Spray Inc Top NAICS codes 115310 Support Activities for Forestry	$11,915,207	0.2%	Rank history: not on the FY2021 list, #45 in FY2022 and not on the FY2024–FY2025 lists; down 45 since FY2022.
91	Bcss, LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$11,914,120	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
92	Hbhansen Construction Inc Through HB Hansen Construction, Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 236220 Commercial and Institutional Building Construction	$11,508,850	0.2%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2024 and not on the FY2025 list; new.
93	Gppc Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$11,488,288	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Mno-Bmadsen Through Seven Generations Architecture & Engineering LLC Top NAICS codes 541330 Engineering Services 541310 Architectural Services	$11,483,388	0.2%	Rank history: not on the FY2021 list, #54 in FY2022 and not on the FY2024–FY2025 lists; down 40 since FY2022.
95	Fugro Geospatial Inc. 2 awardees, including Fugro USA Land, Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services	$11,451,827	0.2%	Rank history: #100 in FY2021, #71 in FY2022 and not on the FY2024–FY2025 lists; down 24 since FY2022.
96	Stantec Inc. 6 awardees, including Stantec Consulting Services Inc. Top NAICS codes 541330 Engineering Services	$11,444,342	0.2%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2024 and #68 in FY2025; new.
97	Koman Sustainable Solutions, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$11,408,153	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
98	Oil Price Information Service LLC 3 awardees, including IHS Global Inc. and Premier Data Services Inc. Top NAICS codes 541519 Other Computer Related Services 519190 All Other Information Services 511210 Software Publishers	$11,148,224	0.2%	Rank history: not on the FY2021 list, #85 in FY2022 and not on the FY2024–FY2025 lists; down 13 since FY2022.
99	Vanasse Hangen Brustlin, Inc. 2 awardees Top NAICS codes 541330 Engineering Services 541620 Environmental Consulting Services	$11,110,904	0.2%	Rank history: #87 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 13 since FY2022.
100	The Aleut Corporation Through Aleut Construction LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 562910 Remediation Services	$11,107,075	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #42 in FY2025; new.

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 $6.12 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.

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