Top 100 Contractors in NAICS 541690: Other Scientific and Technical Consulting Services, Aug 2025–Jul 2026

Name: Top 100 Contractors in NAICS 541690: Other Scientific and Technical Consulting Services, Aug 2025–Jul 2026
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Code page on GovTribe

The latest 12 months. See the newest fiscal year's list: Top Contractors in NAICS 541690: Other Scientific and Technical Consulting Services, FY2025.

The top 10 won 33% of NAICS 541690 contract dollars from August 2025 through July 2026

Contract obligations: $1,840,965,876 Net of deobligations, by contracts coded NAICS 541690
Contractors: 767 Parent companies with an obligation
Largest contractor: General Dynamics Corporation $150 million, 7.4% of obligations
Data as of: Nov 5, 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	General Dynamics Corporation 3 awardees, including General Dynamics One Source LLC and General Dynamics Information Technology, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$149,783,507	7.4%	Rank history: #6 in FY2021, #15 in FY2022, #12 in FY2023, #3 in FY2024 and #3 in FY2025; up 1 since Aug 2024–Jul 2025.
2	Parsons Corporation Through Parsons Government Services Inc. Top agencies USAF (Department of the Air Force)	$130,036,685	6.4%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023, #7 in FY2024 and #1 in FY2025; up 2 since Aug 2024–Jul 2025.
3	Kelly Services, Inc. Top agencies HHS (Department of Health and Human Services)	$84,646,471	4.2%	Rank history: not on the FY2021 list, #49 in FY2022, not on the FY2023 list, #2 in FY2024 and #4 in FY2025; unchanged since Aug 2024–Jul 2025.
4	Lockheed Martin Corporation 4 awardees Top agencies Army (Department of the Army)	$73,512,849	3.6%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023, #1 in FY2024 and #2 in FY2025; down 3 since Aug 2024–Jul 2025.
5	System High Corporation Top agencies DARPA (Defense Advanced Research Projects Agency) MDA (DOD Missile Defense Agency) Army (Department of the Army)	$67,990,955	3.4%	Rank history: not on the FY2021 list, #9 in FY2022, #7 in FY2023, #6 in FY2024 and #5 in FY2025; up 2 since Aug 2024–Jul 2025.
6	Pundir Group, Inc. Top agencies GSA (General Services Administration) Navy (Department of the Navy) DOJ (Department of Justice)	$37,895,427	1.9%	Rank history: not on the FY2021 list, #67 in FY2022, #44 in FY2023, #29 in FY2024 and #15 in FY2025; up 10 since Aug 2024–Jul 2025.
7	V2X, Inc. Through V2X Aerospace LLC Top agencies USAF (Department of the Air Force)	$31,054,116	1.5%	Rank history: not on the FY2021–FY2025 lists; up 221 since Aug 2024–Jul 2025.
8	Michael Stapleton Associates, Ltd. Top agencies DOS (Department of State)	$30,126,107	1.5%	Rank history: #7 in FY2021, #16 in FY2022, #14 in FY2023, #12 in FY2024 and #10 in FY2025; up 2 since Aug 2024–Jul 2025.
9	Axle Informatics, LLC Top agencies HHS (Department of Health and Human Services)	$29,697,341	1.5%	Rank history: #57 in FY2021, #13 in FY2022, #9 in FY2023, #11 in FY2024 and #12 in FY2025; up 4 since Aug 2024–Jul 2025.
10	Unwin Co Top agencies DOE (Department of Energy)	$29,341,481	1.4%	Rank history: #10 in FY2021, #7 in FY2022, #6 in FY2023, #9 in FY2024 and #13 in FY2025; up 1 since Aug 2024–Jul 2025.
11	ManTech International Corporation Through Mantech Advanced Systems International, Inc. Top agencies USAF (Department of the Air Force)	$27,910,480	1.4%	Rank history: #4 in FY2021, #4 in FY2022, #8 in FY2023, #13 in FY2024 and #7 in FY2025; down 3 since Aug 2024–Jul 2025.
12	Gap Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$26,458,712	1.3%	Rank history: not on the FY2021–FY2023 lists, #22 in FY2024 and #14 in FY2025; up 3 since Aug 2024–Jul 2025.
13	Goldbelt, Incorporated 4 awardees, including Goldbelt Professional Services, LLC, Goldbelt C6, LLC and Nisga'a Mostt, LLC Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$22,401,046	1.1%	Rank history: #85 in FY2021, #69 in FY2022, #53 in FY2023, not on the FY2024 list and #19 in FY2025; new, not ranked in Aug 2024–Jul 2025.
14	Invictus Consulting Services LLC Top agencies DOE (Department of Energy)	$20,642,534	1.0%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; up 147 since Aug 2024–Jul 2025.
15	The Emmes Company, LLC 2 awardees, including Essex Management LLC Top agencies HHS (Department of Health and Human Services)	$19,283,436	1.0%	Rank history: not on the FY2021–FY2024 lists and #22 in FY2025; up 202 since Aug 2024–Jul 2025.
16	American Bureau of Shipping Through RMC 2021 LLC Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$19,064,571	0.9%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; new, not ranked in Aug 2024–Jul 2025.
17	Xprestest Inc. Top agencies HHS (Department of Health and Human Services)	$18,137,976	0.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
18	Ameresco Inc. 2 awardees, including Ameresco Select, Inc. and Ameresco Federal Solutions, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$17,653,928	0.9%	Rank history: #14 in FY2021, #25 in FY2022, #28 in FY2023, #31 in FY2024 and #20 in FY2025; up 3 since Aug 2024–Jul 2025.
19	National Academy of Sciences Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DOT (Department of Transportation)	$16,705,141	0.8%	Rank history: #9 in FY2021, #18 in FY2022, #11 in FY2023, #19 in FY2024 and #59 in FY2025; up 17 since Aug 2024–Jul 2025.
20	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies HHS (Department of Health and Human Services)	$16,172,452	0.8%	Rank history: #3 in FY2021, #28 in FY2022, #19 in FY2023, #23 in FY2024 and #16 in FY2025; down 1 since Aug 2024–Jul 2025.
21	Noblis, Inc. Top agencies Army (Department of the Army)	$15,430,052	0.8%	Rank history: #59 in FY2021, #30 in FY2022, #41 in FY2023, #36 in FY2024 and #37 in FY2025; up 8 since Aug 2024–Jul 2025.
22	JP Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$15,338,647	0.8%	Rank history: #23 in FY2021, #26 in FY2022, #17 in FY2023, #16 in FY2024 and #100 in FY2025; up 78 since Aug 2024–Jul 2025.
23	Yale New Haven Health Services Corporation Top agencies HHS (Department of Health and Human Services)	$15,226,723	0.8%	Rank history: #15 in FY2021, #19 in FY2022, #23 in FY2023, #30 in FY2024 and #30 in FY2025; up 10 since Aug 2024–Jul 2025.
24	Nana Regional Corporation Inc. 5 awardees, including TKC Global Solutions, LLC and Akima Data Management LLC Top agencies DOE (Department of Energy) DTRA (Defense Threat Reduction Agency)	$14,925,763	0.7%	Rank history: not on the FY2021–FY2023 lists, #46 in FY2024 and #23 in FY2025; up 16 since Aug 2024–Jul 2025.
25	Janus Research Group, LLC Top agencies Army (Department of the Army)	$14,791,429	0.7%	Rank history: not on the FY2021 list, #20 in FY2022, #18 in FY2023, #21 in FY2024 and #25 in FY2025; down 2 since Aug 2024–Jul 2025.
26	Kegman Inc. Top agencies USAF (Department of the Air Force)	$14,733,032	0.7%	Rank history: #69 in FY2021, #54 in FY2022, #35 in FY2023, #34 in FY2024 and #28 in FY2025; up 1 since Aug 2024–Jul 2025.
27	Battelle Memorial Institute Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$13,739,637	0.7%	Rank history: #33 in FY2021, #31 in FY2022, #40 in FY2023, #32 in FY2024 and #27 in FY2025; down 1 since Aug 2024–Jul 2025.
28	Olgoonik Corporation 2 awardees, including Olgoonik Solutions LLC Top agencies DOS (Department of State)	$13,706,074	0.7%	Rank history: #34 in FY2021, #46 in FY2022, not on the FY2023–FY2024 lists and #38 in FY2025; new, not ranked in Aug 2024–Jul 2025.
29	Hdr, Inc. Through HDR Environmental, Operations and Construction, Inc. Top agencies Navy (Department of the Navy)	$13,393,168	0.7%	Rank history: #29 in FY2021, #45 in FY2022, #49 in FY2023, #25 in FY2024 and #26 in FY2025; down 9 since Aug 2024–Jul 2025.
30	National Opinion Research Center Top agencies HHS (Department of Health and Human Services)	$12,760,614	0.6%	Rank history: #64 in FY2021, not on the FY2022 list, #32 in FY2023, #50 in FY2024 and #36 in FY2025; up 17 since Aug 2024–Jul 2025.
31	Research Triangle Institute Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$11,923,971	0.6%	Rank history: not on the FY2021 list, #65 in FY2022, #30 in FY2023, #14 in FY2024 and #6 in FY2025; down 26 since Aug 2024–Jul 2025.
32	Fedwriters, Inc. Top agencies Commerce (Department of Commerce) Navy (Department of the Navy)	$11,281,576	0.6%	Rank history: not on the FY2021 list, #83 in FY2022, #78 in FY2023, #61 in FY2024 and #33 in FY2025; up 20 since Aug 2024–Jul 2025.
33	Venergy Group LLC Top agencies VA (Department of Veterans Affairs) DOL (Department of Labor) USDA (Department of Agriculture)	$11,072,545	0.5%	Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; up 54 since Aug 2024–Jul 2025.
34	The Brattle Group Inc Top agencies Treasury (Department of the Treasury) FTC (Federal Trade Commission)	$10,767,664	0.5%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; up 40 since Aug 2024–Jul 2025.
35	T3I, Inc. Top agencies USAF (Department of the Air Force)	$10,711,620	0.5%	Rank history: not on the FY2021–FY2025 lists; up 361 since Aug 2024–Jul 2025.
36	Harvard Pilgrim Health Care, Inc. Top agencies HHS (Department of Health and Human Services)	$10,483,494	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
37	K2 Group, Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$10,395,249	0.5%	Rank history: #61 in FY2021, #64 in FY2022, not on the FY2023 list, #59 in FY2024 and #42 in FY2025; up 12 since Aug 2024–Jul 2025.
38	MRIGLOBAL Top agencies HHS (Department of Health and Human Services)	$10,253,810	0.5%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023, #54 in FY2024 and #44 in FY2025; up 10 since Aug 2024–Jul 2025.
39	John H. Northrop & Associates, Inc. Through Technology Security Associates, Inc. Top agencies Navy (Department of the Navy)	$10,245,606	0.5%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; new, not ranked in Aug 2024–Jul 2025.
40	Guidehouse Digital LLC Top agencies HHS (Department of Health and Human Services)	$9,680,094	0.5%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; new, not ranked in Aug 2024–Jul 2025.
41	Tatitlek Government Services, LLC Top agencies DOS (Department of State)	$9,624,811	0.5%	Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and #35 in FY2025; down 2 since Aug 2024–Jul 2025.
42	Mathematica Inc. Top agencies HHS (Department of Health and Human Services) MCC (Millennium Challenge Corporation)	$9,478,131	0.5%	Rank history: not on the FY2021–FY2023 lists, #42 in FY2024 and #46 in FY2025; up 16 since Aug 2024–Jul 2025.
43	W R Systems Ltd. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$9,296,398	0.5%	Rank history: #53 in FY2021, not on the FY2022–FY2023 lists, #58 in FY2024 and #80 in FY2025; up 12 since Aug 2024–Jul 2025.
44	Ecodata Analytics LLC Top agencies DOI (Department of the Interior)	$9,222,161	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
45	American Institutes for Research In the Behavioral Sciences Top agencies HHS (Department of Health and Human Services)	$8,288,898	0.4%	Rank history: #95 in FY2021, #78 in FY2022, #70 in FY2023, #52 in FY2024 and #47 in FY2025; up 8 since Aug 2024–Jul 2025.
46	Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies USAF (Department of the Air Force) DOS (Department of State) HHS (Department of Health and Human Services)	$8,190,835	0.4%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; new, not ranked in Aug 2024–Jul 2025.
47	A.i.s., Inc. Top agencies Commerce (Department of Commerce)	$7,901,860	0.4%	Rank history: #83 in FY2021, not on the FY2022–FY2023 lists, #99 in FY2024 and #56 in FY2025; up 45 since Aug 2024–Jul 2025.
48	Arctic Slope Regional Corporation 3 awardees, including Broadleaf, Inc., Asrc Federal Facilities Logistics LLC and Asrc Federal Technology Solutions, LLC Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense) CFTC (Commodity Futures Trading Commission)	$7,884,866	0.4%	Rank history: not on the FY2021–FY2023 lists, #92 in FY2024 and #40 in FY2025; up 11 since Aug 2024–Jul 2025.
49	Kennell & Associates Inc. Top agencies DHA (Defense Health Agency)	$7,480,823	0.4%	Rank history: #70 in FY2021, #75 in FY2022, #69 in FY2023, #67 in FY2024 and #54 in FY2025; up 7 since Aug 2024–Jul 2025.
50	Chickasaw Nation 2 awardees, including Chickasaw Business Solutions, LLC and Chickasaw Federal Health, LLC Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$7,299,640	0.4%	Rank history: not on the FY2021–FY2024 lists and #62 in FY2025; up 336 since Aug 2024–Jul 2025.
51	Kbr, Inc. Through KBR Wyle Services, LLC Top agencies NASA (National Aeronautics and Space Administration)	$7,230,386	0.4%	Rank history: #19 in FY2021, #23 in FY2022, #13 in FY2023, #94 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
52	Westat, Inc. Top agencies HHS (Department of Health and Human Services)	$7,229,339	0.4%	Rank history: #18 in FY2021 and not on the FY2022–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
53	Serco Inc Top agencies Navy (Department of the Navy)	$7,054,797	0.3%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2023, #68 in FY2024 and not on the FY2025 list; up 9 since Aug 2024–Jul 2025.
54	Mobius Consulting LLC Top agencies MDA (DOD Missile Defense Agency)	$6,826,000	0.3%	Rank history: not on the FY2021–FY2023 lists, #100 in FY2024 and #50 in FY2025; down 3 since Aug 2024–Jul 2025.
55	Chinook Systems Inc. Top agencies WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense) GSA (General Services Administration)	$6,480,274	0.3%	Rank history: not on the FY2021–FY2023 lists, #76 in FY2024 and #55 in FY2025; up 182 since Aug 2024–Jul 2025.
56	Acc3 International Incorporated Top agencies USAF (Department of the Air Force)	$5,833,069	0.3%	Rank history: not on the FY2021–FY2023 lists, #90 in FY2024 and #92 in FY2025; up 22 since Aug 2024–Jul 2025.
57	Berkeley Research Group, LLC Top agencies FTC (Federal Trade Commission) DOL (Department of Labor)	$5,706,689	0.3%	Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; up 10 since Aug 2024–Jul 2025.
58	Systex, Inc. Top agencies HHS (Department of Health and Human Services)	$5,693,734	0.3%	Rank history: #79 in FY2021, #89 in FY2022, #79 in FY2023, #82 in FY2024 and #66 in FY2025; up 8 since Aug 2024–Jul 2025.
59	Valiant Global Defense Services Inc. 2 awardees Top agencies Army (Department of the Army)	$5,477,892	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
60	Maximus Federal Services, Inc. Top agencies OPM (Office of Personnel Management)	$5,432,046	0.3%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; new, not ranked in Aug 2024–Jul 2025.
61	ABT Global LLC 2 awardees Top agencies HHS (Department of Health and Human Services)	$5,113,333	0.3%	Rank history: #41 in FY2021, #27 in FY2022, #55 in FY2023, #39 in FY2024 and #32 in FY2025; up 188 since Aug 2024–Jul 2025.
62	DT Global LLC Top agencies USAID (US Agency for International Development)	$5,000,000	0.2%	Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; up 23 since Aug 2024–Jul 2025.
63	Bastion Technologies, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$4,924,271	0.2%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; up 8 since Aug 2024–Jul 2025.
64	Gulf South Research Corp Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$4,906,331	0.2%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; up 122 since Aug 2024–Jul 2025.
65	Rainmakers Strategic Solutions LLC Top agencies HHS (Department of Health and Human Services)	$4,848,183	0.2%	Rank history: not on the FY2021–FY2023 lists, #85 in FY2024 and #72 in FY2025; up 10 since Aug 2024–Jul 2025.
66	22Nd Century Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$4,837,095	0.2%	Rank history: not on the FY2021 list, #68 in FY2022, #57 in FY2023, not on the FY2024 list and #65 in FY2025; up 10 since Aug 2024–Jul 2025.
67	Vantor Services Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$4,782,545	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
68	Constellis, LLC Through Academi Training Center LLC Top agencies DOS (Department of State)	$4,673,689	0.2%	Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; new, not ranked in Aug 2024–Jul 2025.
69	Republic Mission Systems, Inc. Top agencies Army (Department of the Army)	$4,399,040	0.2%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; new, not ranked in Aug 2024–Jul 2025.
70	The Meridian Group DC LLC Top agencies Navy (Department of the Navy)	$4,381,229	0.2%	Rank history: not on the FY2021–FY2025 lists; up 110 since Aug 2024–Jul 2025.
71	CCS Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$4,250,314	0.2%	Rank history: #60 in FY2021, #82 in FY2022, #89 in FY2023, #80 in FY2024 and #81 in FY2025; down 11 since Aug 2024–Jul 2025.
72	Sol Engineering Services, LLC Top agencies Army (Department of the Army)	$4,234,652	0.2%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; up 38 since Aug 2024–Jul 2025.
73	Code360 Inc. Top agencies HHS (Department of Health and Human Services)	$4,111,965	0.2%	Rank history: not on the FY2021–FY2025 lists; up 39 since Aug 2024–Jul 2025.
74	Riverside Research Institute Top agencies USAF (Department of the Air Force)	$4,013,743	0.2%	Rank history: not on the FY2021–FY2025 lists; up 44 since Aug 2024–Jul 2025.
75	KBR Wyle Services LLC 2 awardees Top agencies NASA (National Aeronautics and Space Administration)	$3,974,781	0.2%	Rank history: not on the FY2021–FY2023 lists, #20 in FY2024 and #11 in FY2025; down 63 since Aug 2024–Jul 2025.
76	Deloitte 2 awardees, including Deloitte Consulting LLP Top agencies USTDA (United States Trade and Development Agency) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$3,853,209	0.2%	Rank history: not on the FY2021–FY2023 lists, #41 in FY2024 and #18 in FY2025; down 62 since Aug 2024–Jul 2025.
77	The CNA Corporation Top agencies DHS (Department of Homeland Security)	$3,842,844	0.2%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; up 16 since Aug 2024–Jul 2025.
78	Science Applications International Corporation Top agencies DOT (Department of Transportation)	$3,754,213	0.2%	Rank history: #31 in FY2021, #42 in FY2022, #46 in FY2023, #60 in FY2024 and #39 in FY2025; down 34 since Aug 2024–Jul 2025.
79	Agile It Synergy, LLC Top agencies Navy (Department of the Navy)	$3,751,977	0.2%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 12 since Aug 2024–Jul 2025.
80	Swmg Productions Inc. Top agencies Army (Department of the Army)	$3,676,692	0.2%	Rank history: #55 in FY2021, #55 in FY2022, not on the FY2023 list, #74 in FY2024 and #49 in FY2025; down 38 since Aug 2024–Jul 2025.
81	Rivit Alliance LLC Top agencies HHS (Department of Health and Human Services)	$3,601,250	0.2%	Rank history: not on the FY2021–FY2024 lists and #95 in FY2025; up 22 since Aug 2024–Jul 2025.
82	Energy Efficiency & Consulting Services, LLC Top agencies Army (Department of the Army)	$3,473,384	0.2%	Rank history: not on the FY2021–FY2025 lists; up 26 since Aug 2024–Jul 2025.
83	Econometrica, Inc. Top agencies HHS (Department of Health and Human Services)	$3,357,753	0.2%	Rank history: not on the FY2021–FY2025 lists; up 28 since Aug 2024–Jul 2025.
84	Apex Analytics Group, Inc. Top agencies Army (Department of the Army)	$3,296,318	0.2%	Rank history: not on the FY2021–FY2025 lists; up 32 since Aug 2024–Jul 2025.
85	Burgman Technical Services, LLC Top agencies USAF (Department of the Air Force)	$3,133,513	0.2%	Rank history: not on the FY2021–FY2025 lists; up 58 since Aug 2024–Jul 2025.
86	Regents of the University of Michigan Top agencies HHS (Department of Health and Human Services) NRC (Nuclear Regulatory Commission)	$3,075,746	0.2%	Rank history: #93 in FY2021, #98 in FY2022, #72 in FY2023, #95 in FY2024 and #98 in FY2025; unchanged since Aug 2024–Jul 2025.
87	Fort Belknap Indian Community Through Buffalo Horse Inc. Top agencies OSD (Office of the Secretary of Defense)	$3,010,249	0.1%	Rank history: not on the FY2021–FY2025 lists; up 26 since Aug 2024–Jul 2025.
88	Hendall Inc. Top agencies HHS (Department of Health and Human Services)	$3,006,718	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
89	Sancorp Consulting, LLC Top agencies Navy (Department of the Navy) DOJ (Department of Justice)	$2,962,398	0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; down 10 since Aug 2024–Jul 2025.
90	JBW Feditc JV LLC Top agencies Army (Department of the Army)	$2,945,340	0.1%	Rank history: not on the FY2021–FY2024 lists and #94 in FY2025; up 19 since Aug 2024–Jul 2025.
91	Ascendant Program Services, LLC Top agencies USTDA (United States Trade and Development Agency)	$2,933,594	0.1%	Rank history: not on the FY2021–FY2025 lists; up 32 since Aug 2024–Jul 2025.
92	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) Army (Department of the Army)	$2,913,996	0.1%	Rank history: #5 in FY2021, #5 in FY2022, #3 in FY2023, #10 in FY2024 and not on the FY2025 list; up 72 since Aug 2024–Jul 2025.
93	S.P. Cramer & Associates, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$2,907,189	0.1%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023, #79 in FY2024 and #60 in FY2025; down 10 since Aug 2024–Jul 2025.
94	Phigenics LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$2,869,393	0.1%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; up 1 since Aug 2024–Jul 2025.
95	Bates White, LLC Top agencies DOJ (Department of Justice) Treasury (Department of the Treasury) FTC (Federal Trade Commission)	$2,829,226	0.1%	Rank history: not on the FY2021 list, #81 in FY2022, #85 in FY2023, #64 in FY2024 and not on the FY2025 list; up 33 since Aug 2024–Jul 2025.
96	Alvarez & Marsal Federal, LLC Top agencies NASA (National Aeronautics and Space Administration)	$2,750,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
97	Seventh Emergence Solutions, LLC Top agencies Army (Department of the Army)	$2,698,468	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
98	D7, LLC Top agencies DTRA (Defense Threat Reduction Agency)	$2,695,341	0.1%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; up 1 since Aug 2024–Jul 2025.
99	Bowhead Marine Support Services, LLC Top agencies Navy (Department of the Navy)	$2,695,087	0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; up 57 since Aug 2024–Jul 2025.
100	Bluehalo LLC Top agencies Army (Department of the Army)	$2,634,241	0.1%	Rank history: not on the FY2021–FY2025 lists; down 31 since Aug 2024–Jul 2025.

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100 of 767 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 $2.03 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.
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 Aug 2024–Jul 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 NAICS 541690 contractors in Aug 2025–Jul 2026?

1. General Dynamics Corporation ($150M), 2. Parsons Corporation ($130M), 3. Kelly Services, Inc. ($84.6M), 4. Lockheed Martin Corporation ($73.5M), 5. System High Corporation ($68M), 6. Pundir Group, Inc. ($37.9M), 7. V2X, Inc. ($31.1M), 8. Michael Stapleton Associates, Ltd. ($30.1M), 9. Axle Informatics, LLC ($29.7M), 10. Unwin Co ($29.3M).

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