Top 100 DOD Washington Headquarters Service Contractors, Jul 2025–Jun 2026

Name: Top 100 DOD Washington Headquarters Service Contractors, Jul 2025–Jun 2026
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Agency page on GovTribe

The top 10 won 45% of DOD Washington Headquarters Service contract dollars from July 2025 through June 2026

Contract obligations: $2,360,465,972 Net of deobligations, by the DOD Washington Headquarters Service and its offices
Contractors: 532 Parent companies with an obligation
Largest contractor: National Security Technology Accelerator Inc. $715 million, 29.0% of obligations
Data as of: Oct 18, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	National Security Technology Accelerator Inc.	$715,318,244	29.0%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023, #2 in FY2024 and #1 in FY2025; unchanged since Jul 2024–Jun 2025.
2	Science Applications International Corporation Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541330 Engineering Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$63,980,746	2.6%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #6 in FY2025; up 5 since Jul 2024–Jun 2025.
3	Deloitte 2 awardees, including Deloitte Consulting LLP and Deloitte & Touche LLP Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541211 Offices of Certified Public Accountants 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$63,201,953	2.6%	Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #2 in FY2025; unchanged since Jul 2024–Jun 2025.
4	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541511 Custom Computer Programming Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$58,250,503	2.4%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023, #1 in FY2024 and #3 in FY2025; down 2 since Jul 2024–Jun 2025.
5	By Light Professional It Services LLC Top NAICS codes 541512 Computer Systems Design Services	$41,800,198	1.7%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and #94 in FY2025; up 80 since Jul 2024–Jun 2025.
6	Massachusetts Institute of Technology 2 awardees Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$38,240,613	1.6%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; up 112 since Jul 2024–Jun 2025.
7	Metrostar Systems, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$34,307,511	1.4%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023, not on the FY2024 list and #4 in FY2025; down 1 since Jul 2024–Jun 2025.
8	Aerovironment, Inc. 3 awardees, including Bluehalo LLC and Videoray LLC Top NAICS codes 336411 Aircraft Manufacturing 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing	$33,727,055	1.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
9	Apex Technology, Inc.	$33,389,446	1.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
10	Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$32,673,775	1.3%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; new, not ranked in Jul 2024–Jun 2025.
11	Two Six Labs, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$30,509,917	1.2%	Rank history: not on the FY2021–FY2024 lists and #13 in FY2025; up 17 since Jul 2024–Jun 2025.
12	Kongsberg Discovery US LLC	$29,760,636	1.2%	Rank history: not on the FY2021–FY2023 lists, #33 in FY2024 and #7 in FY2025; up 25 since Jul 2024–Jun 2025.
13	Huntington Ingalls Industries, Inc. 3 awardees, including Enlighten It Consulting LLC and HII Mission Technologies Corp Top NAICS codes 541511 Custom Computer Programming Services 541330 Engineering Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$29,555,527	1.2%	Rank history: not on the FY2021–FY2023 lists, #35 in FY2024 and #18 in FY2025; up 35 since Jul 2024–Jun 2025.
14	RTX Corporation 9 awardees, including Raytheon Company Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 611430 Professional and Management Development Training	$28,932,092	1.2%	Rank history: #12 in FY2021, #14 in FY2022, #21 in FY2023, #50 in FY2024 and #12 in FY2025; up 42 since Jul 2024–Jun 2025.
15	SNA International LLC Top NAICS codes 621511 Medical Laboratories	$27,493,817	1.1%	Rank history: #17 in FY2021, #19 in FY2022, #23 in FY2023, not on the FY2024 list and #20 in FY2025; up 26 since Jul 2024–Jun 2025.
16	Black Cape, Inc. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$26,959,956	1.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
17	Heidrick & Struggles International Inc. Top NAICS codes 561312 Executive Search Services	$26,885,707	1.1%	Rank history: not on the FY2021–FY2025 lists; up 172 since Jul 2024–Jun 2025.
18	Signature Renovations LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$26,699,401	1.1%	Rank history: not on the FY2021 list, #32 in FY2022, #11 in FY2023, #48 in FY2024 and #9 in FY2025; up 39 since Jul 2024–Jun 2025.
19	Qualx, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$25,364,848	1.0%	Rank history: #25 in FY2021, #11 in FY2022, #14 in FY2023, #28 in FY2024 and #11 in FY2025; down 3 since Jul 2024–Jun 2025.
20	Firestorm Labs, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$23,558,750	1.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
21	One Nation Innovation	$23,352,873	0.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
22	Bytecubed, LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$21,891,249	0.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
23	Private TECH Inc.	$20,339,500	0.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
24	Trust Automation Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$20,315,558	0.8%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; new, not ranked in Jul 2024–Jun 2025.
25	Carnegie Mellon University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$17,299,306	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
26	Securigence LLC Top NAICS codes 541511 Custom Computer Programming Services	$16,898,571	0.7%	Rank history: not on the FY2021–FY2023 lists, #64 in FY2024 and #27 in FY2025; new, not ranked in Jul 2024–Jun 2025.
27	Radiance Technologies, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$16,876,382	0.7%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and not on the FY2025 list; up 37 since Jul 2024–Jun 2025.
28	Inkit Worldwide LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541519 Other Computer Related Services	$15,822,486	0.6%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; new, not ranked in Jul 2024–Jun 2025.
29	Lockheed Martin Corporation 5 awardees Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541330 Engineering Services 336413 Other Aircraft Parts and Auxiliary Equipment Manufacturing	$15,583,895	0.6%	Rank history: #10 in FY2021, #3 in FY2022, #29 in FY2023, #27 in FY2024 and #23 in FY2025; up 3 since Jul 2024–Jun 2025.
30	Nakupuna Consulting LLC Top NAICS codes 541519 Other Computer Related Services 516210 Media Streaming Distribution Services, Social Networks, and Other Media Networks and Content Providers	$14,903,944	0.6%	Rank history: not on the FY2021–FY2022 lists, #30 in FY2023, #25 in FY2024 and #19 in FY2025; down 12 since Jul 2024–Jun 2025.
31	Chameleon Consulting Group, LLC	$14,495,914	0.6%	Rank history: not on the FY2021 list, #44 in FY2022, not on the FY2023–FY2024 lists and #15 in FY2025; up 13 since Jul 2024–Jun 2025.
32	Isi-Markon JV LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$14,453,049	0.6%	Rank history: not on the FY2021–FY2023 lists, #63 in FY2024 and #26 in FY2025; down 19 since Jul 2024–Jun 2025.
33	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology, Inc. and Idaho Scientific LLC Top NAICS codes 541519 Other Computer Related Services 541511 Custom Computer Programming Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$14,377,229	0.6%	Rank history: not on the FY2021–FY2022 lists, #9 in FY2023, #54 in FY2024 and #22 in FY2025; down 10 since Jul 2024–Jun 2025.
34	Servicesource Inc. Top NAICS codes 561210 Facilities Support Services	$14,319,643	0.6%	Rank history: #4 in FY2021, #6 in FY2022, #12 in FY2023, #8 in FY2024 and #10 in FY2025; down 29 since Jul 2024–Jun 2025.
35	Quicklogic Corp	$13,006,000	0.5%	Rank history: not on the FY2021 list, #34 in FY2022, #19 in FY2023, #70 in FY2024 and #45 in FY2025; down 2 since Jul 2024–Jun 2025.
36	Technista LLC	$12,886,061	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
37	Systems & Technology Research LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$12,868,562	0.5%	Rank history: not on the FY2021–FY2024 lists and #63 in FY2025; up 42 since Jul 2024–Jun 2025.
38	Qcm, Inc. Top NAICS codes 238220 Plumbing, Heating, and Air-Conditioning Contractors	$11,600,492	0.5%	Rank history: #26 in FY2021, #30 in FY2022, #31 in FY2023, #22 in FY2024 and #43 in FY2025; down 14 since Jul 2024–Jun 2025.
39	Hdr, Inc. Through HDR Architecture, Inc. Top NAICS codes 541330 Engineering Services	$11,247,355	0.5%	Rank history: #49 in FY2021, #29 in FY2022, #34 in FY2023, #69 in FY2024 and #57 in FY2025; up 26 since Jul 2024–Jun 2025.
40	Nhanced Semiconductors, Inc.	$11,217,411	0.5%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2023, #23 in FY2024 and #16 in FY2025; down 32 since Jul 2024–Jun 2025.
41	Maximus Federal Services, Inc. Top NAICS codes 561422 Telemarketing Bureaus and Other Contact Centers 541512 Computer Systems Design Services	$11,137,226	0.5%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; up 58 since Jul 2024–Jun 2025.
42	Strategic Analysis, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$11,003,471	0.4%	Rank history: not on the FY2021–FY2022 lists, #18 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
43	Bering Straits Native Corporation Through Stampede Ventures, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$10,560,036	0.4%	Rank history: #13 in FY2021, #26 in FY2022, not on the FY2023–FY2024 lists and #35 in FY2025; up 237 since Jul 2024–Jun 2025.
44	Nana Regional Corporation, Inc. Through Akima Data Management LLC Top NAICS codes 541512 Computer Systems Design Services	$10,489,812	0.4%	Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; up 199 since Jul 2024–Jun 2025.
45	Project S Technologies LLC	$10,027,500	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
46	Battelle Memorial Institute Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$9,854,108	0.4%	Rank history: not on the FY2021–FY2025 lists; up 347 since Jul 2024–Jun 2025.
47	Ethic Tech, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$9,785,248	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
48	The Timken Company Through CGI Federal Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$9,597,693	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
49	Koniag Professional Services, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$9,275,688	0.4%	Rank history: not on the FY2021–FY2024 lists and #92 in FY2025; up 241 since Jul 2024–Jun 2025.
50	Chimes International, Ltd. Through Chimes District of Columbia Inc. Top NAICS codes 561720 Janitorial Services	$8,817,208	0.4%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; up 5 since Jul 2024–Jun 2025.
51	Cathexis LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$8,744,653	0.4%	Rank history: not on the FY2021–FY2023 lists, #52 in FY2024 and #34 in FY2025; down 6 since Jul 2024–Jun 2025.
52	Koniag It Systems, LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$8,549,042	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
53	Coho Consulting Group LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541614 Process, Physical Distribution, and Logistics Consulting Services	$8,350,206	0.3%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2023, #51 in FY2024 and #41 in FY2025; down 2 since Jul 2024–Jun 2025.
54	Icr, Inc. Top NAICS codes 541511 Custom Computer Programming Services	$8,246,178	0.3%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; down 14 since Jul 2024–Jun 2025.
55	M.c. Dean, Inc. Top NAICS codes 811310 Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance 238210 Electrical Contractors and Other Wiring Installation Contractors 561621 Security Systems Services (except Locksmiths)	$8,245,065	0.3%	Rank history: #8 in FY2021, #43 in FY2022, #61 in FY2023, #46 in FY2024 and #47 in FY2025; down 2 since Jul 2024–Jun 2025.
56	Northrop Grumman Systems Corporation 2 awardees Top NAICS codes 336414 Guided Missile and Space Vehicle Manufacturing	$7,883,697	0.3%	Rank history: not on the FY2021 list, #9 in FY2022, #7 in FY2023, #6 in FY2024 and #5 in FY2025; down 52 since Jul 2024–Jun 2025.
57	Steel Founders Society of America	$7,800,000	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
58	HDD JV Top NAICS codes 237310 Highway, Street, and Bridge Construction	$7,590,000	0.3%	Rank history: not on the FY2021–FY2024 lists and #48 in FY2025; new, not ranked in Jul 2024–Jun 2025.
59	Puyenpa Technologies LLC 2 awardees Top NAICS codes 236220 Commercial and Institutional Building Construction 336611 Ship Building and Repairing	$7,509,566	0.3%	Rank history: not on the FY2021–FY2024 lists and #49 in FY2025; new, not ranked in Jul 2024–Jun 2025.
60	Bigbear.ai Federal, LLC Top NAICS codes 541512 Computer Systems Design Services	$7,302,367	0.3%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; up 8 since Jul 2024–Jun 2025.
61	Tekpro Support Services, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$7,124,586	0.3%	Rank history: not on the FY2021–FY2023 lists, #56 in FY2024 and #50 in FY2025; down 7 since Jul 2024–Jun 2025.
62	Koniag Emerging Technologies LLC Top NAICS codes 541512 Computer Systems Design Services 541611 Administrative Management and General Management Consulting Services	$6,735,069	0.3%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; new, not ranked in Jul 2024–Jun 2025.
63	Vannevar Labs, Inc.	$6,711,655	0.3%	Rank history: not on the FY2021–FY2025 lists; up 118 since Jul 2024–Jun 2025.
64	Advanced Technology International	$6,579,234	0.3%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and #29 in FY2025; down 28 since Jul 2024–Jun 2025.
65	CGI Federal Inc. 2 awardees, including Sehlke Consulting LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$6,571,629	0.3%	Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; new, not ranked in Jul 2024–Jun 2025.
66	The Pennsylvania State University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$6,501,354	0.3%	Rank history: #83 in FY2021 and not on the FY2022–FY2025 lists; up 251 since Jul 2024–Jun 2025.
67	CCS Lintech JV LLC Top NAICS codes 541512 Computer Systems Design Services	$6,470,359	0.3%	Rank history: not on the FY2021–FY2023 lists, #68 in FY2024 and #39 in FY2025; down 29 since Jul 2024–Jun 2025.
68	Aevex Aerospace, LLC	$6,400,000	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
69	Chinook Systems Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$6,326,575	0.3%	Rank history: not on the FY2021–FY2023 lists, #65 in FY2024 and #54 in FY2025; up 165 since Jul 2024–Jun 2025.
70	Jasint Consulting and Technologies, LLC Top NAICS codes 541612 Human Resources Consulting Services 541512 Computer Systems Design Services 541611 Administrative Management and General Management Consulting Services	$6,160,800	0.2%	Rank history: #39 in FY2021, #40 in FY2022, #46 in FY2023, not on the FY2024 list and #68 in FY2025; up 45 since Jul 2024–Jun 2025.
71	Alliance for Energy Innovation, LLC Top NAICS codes 541711 Research and Development in Biotechnology	$6,140,530	0.2%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023, #11 in FY2024 and #97 in FY2025; up 62 since Jul 2024–Jun 2025.
72	Science Spark	$5,671,998	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
73	TEC Solutions LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$5,482,509	0.2%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; up 112 since Jul 2024–Jun 2025.
74	University of Dayton Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$5,465,028	0.2%	Rank history: not on the FY2021–FY2023 lists, #67 in FY2024 and not on the FY2025 list; up 219 since Jul 2024–Jun 2025.
75	Cencore LLC Top NAICS codes 332311 Prefabricated Metal Building and Component Manufacturing	$5,449,980	0.2%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; new, not ranked in Jul 2024–Jun 2025.
76	The Mitre Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$5,393,063	0.2%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; new, not ranked in Jul 2024–Jun 2025.
77	R & R Janitorial, Painting & Building Services Inc. Top NAICS codes 561720 Janitorial Services	$5,315,523	0.2%	Rank history: #46 in FY2021, #36 in FY2022, #55 in FY2023, #81 in FY2024 and #75 in FY2025; up 6 since Jul 2024–Jun 2025.
78	Silver Lake - TMG Jv2, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$5,292,723	0.2%	Rank history: not on the FY2021–FY2023 lists, #71 in FY2024 and not on the FY2025 list; down 9 since Jul 2024–Jun 2025.
79	Nakupuna Services LLC Top NAICS codes 561210 Facilities Support Services	$5,213,782	0.2%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; up 14 since Jul 2024–Jun 2025.
80	Calspan, LLC Top NAICS codes 488190 Other Support Activities for Air Transportation	$5,200,000	0.2%	Rank history: not on the FY2021–FY2023 lists, #72 in FY2024 and #60 in FY2025; down 14 since Jul 2024–Jun 2025.
81	AAA Complete Building Services Inc. Top NAICS codes 238220 Plumbing, Heating, and Air-Conditioning Contractors	$5,085,057	0.2%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; up 1 since Jul 2024–Jun 2025.
82	Tactical Engineering & Analysis, Inc. Top NAICS codes 541330 Engineering Services	$5,073,671	0.2%	Rank history: not on the FY2021–FY2025 lists; up 73 since Jul 2024–Jun 2025.
83	The CNA Corporation Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$5,043,345	0.2%	Rank history: #29 in FY2021, #31 in FY2022, #22 in FY2023, #38 in FY2024 and #37 in FY2025; down 34 since Jul 2024–Jun 2025.
84	Jensen Hughes, Inc. Top NAICS codes 541330 Engineering Services	$5,023,935	0.2%	Rank history: #55 in FY2021, #52 in FY2022, #54 in FY2023, #80 in FY2024 and #72 in FY2025; down 12 since Jul 2024–Jun 2025.
85	Po`okela Solutions, LLC Top NAICS codes 541519 Other Computer Related Services	$4,660,082	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
86	Naval & Maritime Consortium Inc.	$4,499,490	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
87	Cedarville Engineering Group LLC Top NAICS codes 237310 Highway, Street, and Bridge Construction	$4,313,141	0.2%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and not on the FY2024–FY2025 lists; up 296 since Jul 2024–Jun 2025.
88	Istari Federal LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$4,236,908	0.2%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; new, not ranked in Jul 2024–Jun 2025.
89	E.f. Kearney, Limited Through Kearney & Company, P.C. Top NAICS codes 541219 Other Accounting Services 541611 Administrative Management and General Management Consulting Services	$4,230,878	0.2%	Rank history: not on the FY2021–FY2023 lists, #100 in FY2024 and #82 in FY2025; up 14 since Jul 2024–Jun 2025.
90	Dgi-Ati II LLC Top NAICS codes 541620 Environmental Consulting Services	$4,110,684	0.2%	Rank history: not on the FY2021–FY2024 lists and #87 in FY2025; down 3 since Jul 2024–Jun 2025.
91	Bering Straits Global Innovations, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$4,059,398	0.2%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; new, not ranked in Jul 2024–Jun 2025.
92	Gallatin AI, Inc.	$4,000,000	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
93	Georgia TECH Applied Research Corp Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,959,097	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
94	Carahsoft Technology Corp Top NAICS codes 511210 Software Publishers 541519 Other Computer Related Services 513210 Software Publishers	$3,952,243	0.2%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; up 18 since Jul 2024–Jun 2025.
95	Exceptional Employees for Exceptional Results Inc. Top NAICS codes 541330 Engineering Services	$3,901,584	0.2%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; up 28 since Jul 2024–Jun 2025.
96	The Clearing, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$3,812,361	0.2%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2023, not on the FY2024 list and #70 in FY2025; up 5 since Jul 2024–Jun 2025.
97	Addon Services LLC Top NAICS codes 237310 Highway, Street, and Bridge Construction	$3,807,454	0.2%	Rank history: not on the FY2021–FY2023 lists, #26 in FY2024 and #89 in FY2025; down 62 since Jul 2024–Jun 2025.
98	Metron Incorporated Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,733,610	0.2%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; new, not ranked in Jul 2024–Jun 2025.
99	Concurrent Technologies Corp Top NAICS codes 541330 Engineering Services	$3,571,030	0.1%	Rank history: not on the FY2021 list, #25 in FY2022, #17 in FY2023, #29 in FY2024 and #28 in FY2025; down 65 since Jul 2024–Jun 2025.
100	IST Research, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,527,517	0.1%	Rank history: not on the FY2021–FY2023 lists, #13 in FY2024 and #40 in FY2025; down 83 since Jul 2024–Jun 2025.

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100 of 532 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 $2.47 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.
Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
Rank changes compare with Jul 2024–Jun 2025. "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.
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 DOD Washington Headquarters Service contractors in Jul 2025–Jun 2026?

1. National Security Technology Accelerator Inc. ($715M), 2. Science Applications International Corporation ($64M), 3. Deloitte ($63.2M), 4. Booz Allen Hamilton Holding Corporation ($58.3M), 5. By Light Professional It Services LLC ($41.8M), 6. Massachusetts Institute of Technology ($38.2M), 7. Metrostar Systems, LLC ($34.3M), 8. Aerovironment, Inc. ($33.7M), 9. Apex Technology, Inc. ($33.4M), 10. Johns Hopkins University ($32.7M).

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