Top 100 Contractors in NAICS 54: Professional, Scientific, and Technical Services, FY2025

Name: Top 100 Contractors in NAICS 54: Professional, Scientific, and Technical Services, FY2025
Creator: GovTribe

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

The top 10 won 25% of FY2025 NAICS 54 contract dollars

Contract obligations: $221,494,526,636 Net of deobligations, by contracts coded NAICS 54 or a code under it
Contractors: 20,119 Parent companies with an obligation
Largest contractor: General Dynamics Corporation $12.1 billion, 5.1% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	General Dynamics Corporation 43 awardees, including Electric Boat Corporation, General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$12,054,448,858	5.1%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Lockheed Martin Corporation 42 awardees Top agencies MDA (DOD Missile Defense Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$8,387,495,490	3.6%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023 and #3 in FY2024; up 1 since FY2024.
3	Booz Allen Hamilton Holding Corporation 13 awardees, including Booz Allen Hamilton Inc., Liberty It Solutions LLC and Thunderyard Liberty JV LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$7,549,528,865	3.2%	Rank history: #3 in FY2021, #4 in FY2022, #3 in FY2023 and #2 in FY2024; down 1 since FY2024.
4	Leidos Holdings, Inc. 27 awardees, including Leidos, Inc. and Leidos Biomedical Research Inc. Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) Army (Department of the Army)	$6,152,143,099	2.6%	Rank history: #4 in FY2021, #3 in FY2022, #4 in FY2023 and #4 in FY2024; unchanged since FY2024.
5	CACI International Inc. 18 awardees, including Caci, Inc. - Federal, Caci Technologies, LLC and Caci Nss, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security) Navy (Department of the Navy)	$4,701,250,024	2.0%	Rank history: #9 in FY2021, #9 in FY2022, #8 in FY2023 and #9 in FY2024; up 4 since FY2024.
6	Northrop Grumman Corporation 62 awardees, including Northrop Grumman Systems Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$4,360,902,844	1.9%	Rank history: #5 in FY2021, #7 in FY2022, #5 in FY2023 and #6 in FY2024; unchanged since FY2024.
7	Science Applications International Corporation 3 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$4,217,427,261	1.8%	Rank history: #7 in FY2021, #6 in FY2022, #6 in FY2023 and #5 in FY2024; down 2 since FY2024.
8	Fluor Corporation 4 awardees, including Fluor Marine Propulsion, LLC, Fluor Federal Services Inc. and Fluor Intercontinental, Inc. Top agencies Navy (Department of the Navy) DOE (Department of Energy) DHS (Department of Homeland Security)	$3,757,367,083	1.6%	Rank history: #8 in FY2021, #8 in FY2022, #7 in FY2023 and #7 in FY2024; down 1 since FY2024.
9	Deloitte 3 awardees, including Deloitte Consulting LLP, Deloitte & Touche LLP and Deloitte Financial Advisory Services LLP Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) Army (Department of the Army)	$3,724,362,688	1.6%	Rank history: not on the FY2021–FY2023 lists and #8 in FY2024; down 1 since FY2024.
10	Accenture Federal Services LLC 7 awardees, including Cognosante MVH LLC, Cognosante, LLC and Cognosante Cds, LLC Top agencies DOE (Department of Energy) Army (Department of the Army) USAF (Department of the Air Force)	$3,488,629,464	1.5%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2024; unchanged since FY2024.
11	RTX Corporation 61 awardees, including Raytheon Company, Range Generation Next LLC and RTX BBN Technologies, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$2,937,541,932	1.2%	Rank history: #6 in FY2021, #5 in FY2022, #9 in FY2023 and #11 in FY2024; unchanged since FY2024.
12	Peraton Inc. 4 awardees, including Peraton Enterprise Solutions LLC, Knight Point Systems, LLC and Safeguard Services LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOS (Department of State)	$2,528,762,049	1.1%	Rank history: not on the FY2021–FY2023 lists and #13 in FY2024; up 1 since FY2024.
13	Amentum Holdings, Inc. 30 awardees, including Amentum Services, Inc., JT4 LLC and Amentum Technology, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$2,330,418,367	1.0%	Rank history: not on the FY2021–FY2024 lists; up 112 since FY2024.
14	California Institute of Technology Top agencies NASA (National Aeronautics and Space Administration) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$2,295,954,700	1.0%	Rank history: #13 in FY2021, #10 in FY2022, #12 in FY2023 and #12 in FY2024; down 2 since FY2024.
15	Battelle Memorial Institute 3 awardees, including Battelle Energy Alliance, LLC Top agencies DOE (Department of Energy) HHS (Department of Health and Human Services) Army (Department of the Army)	$2,290,588,347	1.0%	Rank history: #16 in FY2021, #14 in FY2022, #48 in FY2023 and #22 in FY2024; up 7 since FY2024.
16	Johns Hopkins University 3 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC and The Johns Hopkins Hospital Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) OSD (Office of the Secretary of Defense)	$2,267,995,874	1.0%	Rank history: not on the FY2021–FY2024 lists; new.
17	Huntington Ingalls Industries, Inc. 9 awardees, including HII Mission Technologies Corp, Enlighten It Consulting LLC and HII Technical Solutions Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$1,945,494,122	0.8%	Rank history: #78 in FY2021, #28 in FY2022, #43 in FY2023 and #15 in FY2024; down 2 since FY2024.
18	The Mitre Corporation 3 awardees Top agencies USAF (Department of the Air Force) AAFES (Department of Defense Army and Air Force Exchange Service) Army (Department of the Army)	$1,892,214,767	0.8%	Rank history: #11 in FY2021, #11 in FY2022, #10 in FY2023 and #14 in FY2024; down 4 since FY2024.
19	BAE Systems 19 awardees, including BAE Systems Technology Solutions & Services Inc., BAE Systems Land & Armaments L.P. and BAE Systems Information and Electronic Systems Integration Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$1,810,419,123	0.8%	Rank history: #31 in FY2021, #25 in FY2022, #18 in FY2023 and #17 in FY2024; down 2 since FY2024.
20	Fermi Forward Discovery Group, LLC Top agencies DOE (Department of Energy)	$1,733,790,751	0.7%	Rank history: not on the FY2021–FY2024 lists; new.
21	L3Harris Technologies, Inc. 47 awardees, including Aerojet Rocketdyne of DE, Inc., L3Harris Interstate Electronics Corporation and L3 Technologies, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$1,667,732,056	0.7%	Rank history: #17 in FY2021, #18 in FY2022, #19 in FY2023 and #19 in FY2024; down 2 since FY2024.
22	Parsons Corporation 14 awardees, including Parsons Government Services Inc., Ptsi Managed Services Inc. and Altamira Technologies Corp Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense)	$1,472,875,714	0.6%	Rank history: #27 in FY2021, #27 in FY2022, #29 in FY2023 and #27 in FY2024; up 5 since FY2024.
23	The Boeing Company 30 awardees, including Insitu, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$1,454,669,927	0.6%	Rank history: #12 in FY2021, #16 in FY2022, #20 in FY2023 and #16 in FY2024; down 7 since FY2024.
24	Massachusetts Institute of Technology Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$1,443,735,054	0.6%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2024; unchanged since FY2024.
25	The Aerospace Corporation Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) DOE (Department of Energy)	$1,405,536,210	0.6%	Rank history: #24 in FY2021, #26 in FY2022, #28 in FY2023 and #23 in FY2024; down 2 since FY2024.
26	Tcom, L.P. Top agencies Army (Department of the Army)	$1,387,180,148	0.6%	Rank history: not on the FY2021–FY2024 lists; up 159 since FY2024.
27	KBR Wyle Services LLC 9 awardees, including Dependable Global Solutions, LLC, KBR Services, LLC and Kord Technologies, LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) USAF (Department of the Air Force)	$1,253,533,584	0.5%	Rank history: not on the FY2021–FY2023 lists and #29 in FY2024; up 2 since FY2024.
28	Arctic Slope Regional Corporation 28 awardees, including Applied Research Solutions, Inc., Agile Decision Sciences, LLC and Asrc Federal System Solutions LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$1,244,417,470	0.5%	Rank history: #46 in FY2021, #50 in FY2022, #54 in FY2023 and #56 in FY2024; up 28 since FY2024.
29	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$1,235,909,424	0.5%	Rank history: #18 in FY2021, #20 in FY2022, #27 in FY2023 and #21 in FY2024; down 8 since FY2024.
30	CGI Federal Inc. 3 awardees, including Sehlke Consulting LLC and Manufacturing Technical Solutions, LLC Top agencies DOS (Department of State) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$1,134,629,374	0.5%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2024; up 14 since FY2024.
31	Serco Inc 4 awardees, including Brtrc Federal Solutions, Inc. Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) Army (Department of the Army)	$1,113,628,535	0.5%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and #31 in FY2024; unchanged since FY2024.
32	International Business Machines Corporation 6 awardees Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) Army (Department of the Army)	$1,092,482,411	0.5%	Rank history: #26 in FY2021, #35 in FY2022, #36 in FY2023 and #28 in FY2024; down 4 since FY2024.
33	Oracle Health Government Services Inc. 3 awardees, including Oracle America, Inc. Top agencies VA (Department of Veterans Affairs) DISA (Defense Information Systems Agency) HHS (Department of Health and Human Services)	$1,011,830,639	0.4%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2023 and #34 in FY2024; up 1 since FY2024.
34	FCN, Inc. Top agencies Treasury (Department of the Treasury) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$1,010,787,290	0.4%	Rank history: #42 in FY2021, #41 in FY2022, #32 in FY2023 and #33 in FY2024; down 1 since FY2024.
35	Alliance for Energy Innovation, LLC Top agencies DOE (Department of Energy) Treasury (Department of the Treasury) DOI (Department of the Interior)	$894,961,406	0.4%	Rank history: #44 in FY2021, #38 in FY2022, #24 in FY2023 and #26 in FY2024; down 9 since FY2024.
36	Thundercat Technology LLC Top agencies VA (Department of Veterans Affairs) DHS (Department of Homeland Security) DOS (Department of State)	$856,520,902	0.4%	Rank history: #47 in FY2021, #45 in FY2022, #41 in FY2023 and #40 in FY2024; up 4 since FY2024.
37	ManTech International Corporation 3 awardees, including Mantech Advanced Systems International, Inc., Unison Software Inc. and ECI Software Solutions, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$853,917,325	0.4%	Rank history: #25 in FY2021, #22 in FY2022, #37 in FY2023 and #45 in FY2024; up 8 since FY2024.
38	Brookhaven Science Associates LLC Top agencies DOE (Department of Energy) NASA (National Aeronautics and Space Administration)	$833,759,907	0.4%	Rank history: #36 in FY2021, #30 in FY2022, #40 in FY2023 and #39 in FY2024; up 1 since FY2024.
39	Four Points Technology, L.L.C. Top agencies VA (Department of Veterans Affairs) DHS (Department of Homeland Security) SSA (Social Security Administration)	$816,595,605	0.3%	Rank history: #41 in FY2021, #52 in FY2022, #47 in FY2023 and #36 in FY2024; down 3 since FY2024.
40	Salient Crgt, Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$783,784,799	0.3%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2024; up 48 since FY2024.
41	Blue Origin Washington, LLC Top agencies NASA (National Aeronautics and Space Administration)	$778,380,365	0.3%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2023 and #58 in FY2024; up 17 since FY2024.
42	Smartronix, LLC Top agencies Navy (Department of the Navy) CFTC (Commodity Futures Trading Commission) Army (Department of the Army)	$759,053,658	0.3%	Rank history: not on the FY2021–FY2023 lists and #55 in FY2024; up 13 since FY2024.
43	V3Gate, LLC Top agencies VA (Department of Veterans Affairs) DOS (Department of State) DHS (Department of Homeland Security)	$747,079,821	0.3%	Rank history: #86 in FY2021, #67 in FY2022, #53 in FY2023 and #48 in FY2024; up 5 since FY2024.
44	Sierra Nevada Company, LLC 4 awardees, including Sierra Space Corp and Kutta Technologies, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$727,295,536	0.3%	Rank history: not on the FY2021–FY2023 lists and #51 in FY2024; up 7 since FY2024.
45	Guidehouse Inc. 5 awardees, including Guidehouse Digital LLC, Peraton Technology Services Inc. and Aptim Federal Services, LLC Top agencies HHS (Department of Health and Human Services) DOS (Department of State) DHS (Department of Homeland Security)	$712,525,525	0.3%	Rank history: not on the FY2021–FY2024 lists; up 139 since FY2024.
46	Torch Technologies Inc. 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$679,911,935	0.3%	Rank history: #52 in FY2021, #49 in FY2022, #49 in FY2023 and #47 in FY2024; up 1 since FY2024.
47	Aevex Aerospace, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DFAS (Defense Finance and Accounting Service)	$672,737,792	0.3%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023 and not on the FY2024 list; up 148 since FY2024.
48	Minburn Technology Group, LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) DOS (Department of State)	$609,333,257	0.3%	Rank history: #63 in FY2021, #76 in FY2022, #51 in FY2023 and #43 in FY2024; down 5 since FY2024.
49	Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$596,666,282	0.3%	Rank history: not on the FY2021–FY2023 lists and #57 in FY2024; up 8 since FY2024.
50	Asgn Incorporated Through ECS Federal, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) DOJ (Department of Justice)	$573,424,255	0.2%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2024; up 16 since FY2024.
51	Tetra Tech, Inc. 48 awardees, including LS Technologies LLC, Advanced Management Technology, Inc. and Ard, Inc. Top agencies DOT (Department of Transportation) Army (Department of the Army) USAID (US Agency for International Development)	$563,995,855	0.2%	Rank history: #38 in FY2021, #44 in FY2022, #38 in FY2023 and #37 in FY2024; down 14 since FY2024.
52	V2X, Inc. 5 awardees, including V2X Aerospace LLC, V2X Systems LLC and Vertex Modernization and Sustainment LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DHS (Department of Homeland Security)	$561,472,857	0.2%	Rank history: not on the FY2021–FY2024 lists; up 82 since FY2024.
53	Ameresco Inc. 3 awardees, including Ameresco Select, Inc. Top agencies GSA (General Services Administration) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$558,465,055	0.2%	Rank history: not on the FY2021–FY2024 lists; up 224 since FY2024.
54	Ernst & Young LLP 3 awardees, including Dignari, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security) HUD (Department of Housing and Urban Development)	$556,827,077	0.2%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2024; up 27 since FY2024.
55	New TECH Solutions, Inc. Top agencies Navy (Department of the Navy) DISA (Defense Information Systems Agency) HHS (Department of Health and Human Services)	$505,176,987	0.2%	Rank history: #66 in FY2021, #68 in FY2022, #68 in FY2023 and #63 in FY2024; up 8 since FY2024.
56	Beyond New Horizons, LLC Top agencies USAF (Department of the Air Force)	$496,146,005	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
57	Intuitive Research and Technology Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$470,149,451	0.2%	Rank history: not on the FY2021–FY2024 lists; up 371 since FY2024.
58	The Charles Stark Draper Laboratory, Inc. Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency) Army (Department of the Army)	$464,553,899	0.2%	Rank history: not on the FY2021–FY2022 lists, #91 in FY2023 and #50 in FY2024; down 8 since FY2024.
59	Carahsoft Technology Corp Top agencies Army (Department of the Army) USAF (Department of the Air Force) USDA (Department of Agriculture)	$445,681,182	0.2%	Rank history: not on the FY2021 list, #97 in FY2022, not on the FY2023 list and #67 in FY2024; up 8 since FY2024.
60	Scientific Research Corporation Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$434,579,681	0.2%	Rank history: #100 in FY2021, not on the FY2022 list, #92 in FY2023 and #72 in FY2024; up 12 since FY2024.
61	Odyssey Systems Consulting Group, Ltd. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) Navy (Department of the Navy)	$426,224,382	0.2%	Rank history: not on the FY2021–FY2024 lists; up 245 since FY2024.
62	Kpmg LLP Top agencies Navy (Department of the Navy) Army (Department of the Army) DLA (Defense Logistics Agency)	$421,665,172	0.2%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 30 since FY2024.
63	Deployed Resources LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) HHS (Department of Health and Human Services)	$405,533,451	0.2%	Rank history: #65 in FY2021, #37 in FY2022, #30 in FY2023 and #20 in FY2024; down 43 since FY2024.
64	Applied Research Associates, Inc. Top agencies DTRA (Defense Threat Reduction Agency) Army (Department of the Army) USAF (Department of the Air Force)	$398,321,440	0.2%	Rank history: #79 in FY2021, #69 in FY2022, #56 in FY2023 and #62 in FY2024; down 2 since FY2024.
65	Modern Technology Solutions, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) MDA (DOD Missile Defense Agency)	$393,407,849	0.2%	Rank history: not on the FY2021–FY2024 lists; up 52 since FY2024.
66	DDB Chicago Inc. Top agencies Army (Department of the Army)	$390,942,182	0.2%	Rank history: not on the FY2021–FY2024 lists; up 43 since FY2024.
67	Semanticbits LLC 4 awardees, including ICF Incorporated, L.L.C. and Incentive Technology Group LLC Top agencies HHS (Department of Health and Human Services) DOT (Department of Transportation) DHS (Department of Homeland Security)	$385,933,146	0.2%	Rank history: not on the FY2021–FY2023 lists and #54 in FY2024; down 13 since FY2024.
68	Mantech Tsg-2 Joint Venture Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) DOD (Department of Defense)	$372,295,645	0.2%	Rank history: #90 in FY2021, not on the FY2022–FY2023 lists and #59 in FY2024; down 9 since FY2024.
69	Maximus Federal Services, Inc. Top agencies ED (Department of Education) HHS (Department of Health and Human Services) Treasury (Department of the Treasury)	$370,262,899	0.2%	Rank history: not on the FY2021–FY2024 lists; up 81 since FY2024.
70	Linquest Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$369,078,423	0.2%	Rank history: #89 in FY2021, #100 in FY2022, #89 in FY2023 and #85 in FY2024; up 15 since FY2024.
71	DCS Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$366,893,848	0.2%	Rank history: #69 in FY2021, #81 in FY2022, #79 in FY2023 and #79 in FY2024; up 8 since FY2024.
72	Palantir Technologies Inc. Through Palantir USG Inc. Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army) DLA (Defense Logistics Agency)	$365,586,454	0.2%	Rank history: not on the FY2021–FY2024 lists; up 156 since FY2024.
73	Microsoft Corporation Top agencies Navy (Department of the Navy) Army (Department of the Army) DISA (Defense Information Systems Agency)	$365,380,627	0.2%	Rank history: #57 in FY2021, #56 in FY2022, #60 in FY2023 and #61 in FY2024; down 12 since FY2024.
74	Systems Planning and Analysis, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$362,071,256	0.2%	Rank history: not on the FY2021–FY2024 lists; up 28 since FY2024.
75	World Wide Technology LLC 2 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$359,395,085	0.2%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2023 and #71 in FY2024; down 4 since FY2024.
76	Iron Bow Technologies, LLC Top agencies DISA (Defense Information Systems Agency) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$348,114,181	0.1%	Rank history: not on the FY2021–FY2023 lists and #100 in FY2024; up 24 since FY2024.
77	Mythics Inc. 2 awardees, including Emergent, LLC Top agencies USAF (Department of the Air Force) DOS (Department of State) VA (Department of Veterans Affairs)	$346,988,301	0.1%	Rank history: not on the FY2021–FY2024 lists; up 150 since FY2024.
78	Jacobs Government Services Company 25 awardees, including Jacobs Engineering Group Inc., Amentum Technology, Inc. and JE Architects / Engineers, P.C. Top agencies Army (Department of the Army) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$343,386,593	0.1%	Rank history: not on the FY2021–FY2023 lists and #35 in FY2024; down 43 since FY2024.
79	The Pennsylvania State University Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) OSD (Office of the Secretary of Defense)	$337,593,792	0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023 and #80 in FY2024; up 1 since FY2024.
80	LMI Consulting, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$315,364,204	0.1%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2024; down 7 since FY2024.
81	Credence Management Solutions Limited Liability Company Top agencies USAID (US Agency for International Development) DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$309,958,549	0.1%	Rank history: #93 in FY2021, #89 in FY2022, #88 in FY2023 and #53 in FY2024; down 28 since FY2024.
82	Research Triangle Institute Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development) EPA (Environmental Protection Agency)	$302,820,703	0.1%	Rank history: #56 in FY2021, #59 in FY2022, #58 in FY2023 and #49 in FY2024; down 33 since FY2024.
83	Battelle Savannah River Alliance, LLC Top agencies DOE (Department of Energy)	$302,244,892	0.1%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2024; up 10 since FY2024.
84	AECOM Technical Services, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAID (US Agency for International Development)	$276,955,584	0.1%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2024; down 20 since FY2024.
85	Tecolote Research, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$274,817,752	0.1%	Rank history: not on the FY2021–FY2024 lists; up 31 since FY2024.
86	Noblis, Inc. Top agencies DOT (Department of Transportation) DTRA (Defense Threat Reduction Agency) DHS (Department of Homeland Security)	$272,297,330	0.1%	Rank history: #99 in FY2021, #71 in FY2022, #74 in FY2023 and #77 in FY2024; down 9 since FY2024.
87	Lancer Information Solutions, LLC Top agencies Treasury (Department of the Treasury) CFPB (Consumer Financial Protection Bureau) DOJ (Department of Justice)	$270,778,966	0.1%	Rank history: not on the FY2021–FY2024 lists; up 142 since FY2024.
88	General Atomics Aeronautical Systems, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) USSOCOM (United States Special Operations Command)	$266,721,966	0.1%	Rank history: not on the FY2021–FY2024 lists; up 169 since FY2024.
89	Acquisition Logistics LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$262,969,170	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
90	Space Exploration Technologies Corp. 2 awardees Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) DOS (Department of State)	$262,863,850	0.1%	Rank history: #53 in FY2021, #33 in FY2022, #35 in FY2023 and #46 in FY2024; down 44 since FY2024.
91	Acacia Center for Justice Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$261,192,647	0.1%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2024; down 22 since FY2024.
92	American Systems Corporation 2 awardees Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) DHA (Defense Health Agency)	$255,628,510	0.1%	Rank history: not on the FY2021–FY2023 lists and #95 in FY2024; up 3 since FY2024.
93	Oak Ridge Associated Universities, Incorporated Top agencies DOE (Department of Energy) HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration)	$254,946,382	0.1%	Rank history: #72 in FY2021, #65 in FY2022, #70 in FY2023 and #65 in FY2024; down 28 since FY2024.
94	BAE Systems Land & Armaments L.P. Top agencies Army (Department of the Army)	$253,659,606	0.1%	Rank history: not on the FY2021–FY2024 lists; up 32 since FY2024.
95	Sev1Tech, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security) Navy (Department of the Navy)	$252,170,800	0.1%	Rank history: not on the FY2021–FY2024 lists; up 80 since FY2024.
96	Four LLC Top agencies Treasury (Department of the Treasury) Navy (Department of the Navy) DHS (Department of Homeland Security)	$250,574,153	0.1%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and #74 in FY2024; down 22 since FY2024.
97	It Concepts, Inc. Top agencies VA (Department of Veterans Affairs) USAID (US Agency for International Development) USAF (Department of the Air Force)	$249,497,691	0.1%	Rank history: not on the FY2021–FY2023 lists and #99 in FY2024; up 2 since FY2024.
98	BCG Federal Corp. Top agencies DHA (Defense Health Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$249,171,462	0.1%	Rank history: not on the FY2021–FY2024 lists; up 117 since FY2024.
99	Advanced Computer Concepts, Inc. Top agencies Navy (Department of the Navy) DISA (Defense Information Systems Agency) USAF (Department of the Air Force)	$249,075,971	0.1%	Rank history: not on the FY2021–FY2023 lists and #98 in FY2024; down 1 since FY2024.
100	Metgreen Solutions Inc. Top agencies VA (Department of Veterans Affairs) DOT (Department of Transportation) Treasury (Department of the Treasury)	$245,261,091	0.1%	Rank history: not on the FY2021–FY2024 lists; up 31 since FY2024.

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100 of 20,119 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 54

Code	Net obligations	Largest contractor
541 Professional, Scientific, and Technical Services	$221,494,526,636	General Dynamics Corporation

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 $236 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 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 NAICS 54 contractors in FY2025?

1. General Dynamics Corporation ($12.1B), 2. Lockheed Martin Corporation ($8.39B), 3. Booz Allen Hamilton Holding Corporation ($7.55B), 4. Leidos Holdings, Inc. ($6.15B), 5. CACI International Inc. ($4.7B), 6. Northrop Grumman Corporation ($4.36B), 7. Science Applications International Corporation ($4.22B), 8. Fluor Corporation ($3.76B), 9. Deloitte ($3.72B), 10. Accenture Federal Services LLC ($3.49B).

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