Top 100 Contractors in NAICS 54199: All Other Professional, Scientific, and Technical Services, FY2023

Name: Top 100 Contractors in NAICS 54199: All Other Professional, Scientific, and Technical Services, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 40% of FY2023 NAICS 54199 contract dollars

Contract obligations: $14,505,477,061 Net of deobligations, by contracts coded NAICS 54199 or a code under it
Contractors: 2,977 Parent companies with an obligation
Largest contractor: Battelle Energy Alliance, LLC $2.23 billion, 14.7% 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	Battelle Energy Alliance, LLC 2 awardees Top agencies DOE (Department of Energy)	$2,234,861,162	14.7%	Rank history: not on the FY2021 list, #11 in FY2022, #2 in FY2024 and not on the FY2025 list; up 10 since FY2022.
2	The Mitre Corporation 3 awardees Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,024,629,632	6.7%	Rank history: #3 in FY2021, #2 in FY2022, #3 in FY2024 and #2 in FY2025; unchanged since FY2022.
3	Sierra Nevada Company, LLC 2 awardees Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command)	$732,798,915	4.8%	Rank history: #2 in FY2021, #3 in FY2022, #4 in FY2024 and #4 in FY2025; unchanged since FY2022.
4	Aevex Aerospace, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$453,950,497	3.0%	Rank history: not on the FY2021 list, #14 in FY2022, #20 in FY2024 and not on the FY2025 list; up 10 since FY2022.
5	Oak Ridge Associated Universities, Incorporated Top agencies DOE (Department of Energy) HHS (Department of Health and Human Services) EPA (Environmental Protection Agency)	$405,421,760	2.7%	Rank history: #5 in FY2021, #4 in FY2022, #6 in FY2024 and #9 in FY2025; down 1 since FY2022.
6	DAI Global LLC Top agencies USAID (US Agency for International Development)	$350,750,491	2.3%	Rank history: #7 in FY2021, #5 in FY2022, #7 in FY2024 and #13 in FY2025; down 1 since FY2022.
7	Booz Allen Hamilton Holding Corporation 2 awardees, including Booz Allen Hamilton Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) OSD (Office of the Secretary of Defense) HHS (Department of Health and Human Services)	$242,969,891	1.6%	Rank history: #11 in FY2021, #9 in FY2022, #8 in FY2024 and #3 in FY2025; up 2 since FY2022.
8	Institute for Defense Analyses Top agencies OSD (Office of the Secretary of Defense) NSF (National Science Foundation) NASA (National Aeronautics and Space Administration)	$229,928,928	1.5%	Rank history: #12 in FY2021, #8 in FY2022, #9 in FY2024 and #8 in FY2025; unchanged since FY2022.
9	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$226,217,948	1.5%	Rank history: #9 in FY2021, #7 in FY2022, #14 in FY2024 and #29 in FY2025; down 2 since FY2022.
10	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies OSD (Office of the Secretary of Defense) USSOCOM (United States Special Operations Command) USAF (Department of the Air Force)	$224,698,816	1.5%	Rank history: #8 in FY2021, #12 in FY2022, #87 in FY2024 and not on the FY2025 list; up 2 since FY2022.
11	Tetra Tech, Inc. 7 awardees, including Ard, Inc., Tetra TECH ES, Inc. and Management Systems International, Inc. Top agencies USAID (US Agency for International Development) DOT (Department of Transportation) DSCA (Defense Security Cooperation Agency)	$214,977,057	1.4%	Rank history: #14 in FY2021, #19 in FY2022, #12 in FY2024 and #59 in FY2025; up 8 since FY2022.
12	ABT Global LLC 2 awardees Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services) Commerce (Department of Commerce)	$213,947,753	1.4%	Rank history: #6 in FY2021, #6 in FY2022, #11 in FY2024 and #10 in FY2025; down 6 since FY2022.
13	Northrop Grumman Corporation 9 awardees, including Northrop Grumman Systems Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$180,146,068	1.2%	Rank history: #17 in FY2021, #10 in FY2022, #13 in FY2024 and #7 in FY2025; down 3 since FY2022.
14	Research Triangle Institute Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development) NSF (National Science Foundation)	$175,180,644	1.1%	Rank history: #16 in FY2021, #15 in FY2022, #15 in FY2024 and #21 in FY2025; up 1 since FY2022.
15	Amentum Services, Inc. 2 awardees, including URS Federal Services International, Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$131,611,314	0.9%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2024 and not on the FY2025 list; new.
16	The Rand Corporation Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army)	$118,093,582	0.8%	Rank history: #18 in FY2021, #16 in FY2022, #21 in FY2024 and #24 in FY2025; unchanged since FY2022.
17	Huntington Ingalls Industries, Inc. Through HII Mission Technologies Corp Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$114,574,393	0.8%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2024 and #6 in FY2025; up 176 since FY2022.
18	RTX Corporation 12 awardees, including Raytheon Company, Everfox LLC and Rockwell Collins, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$114,102,676	0.7%	Rank history: #13 in FY2021, #13 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
19	Parsons Corporation 3 awardees, including Ptsi Managed Services Inc. and Parsons Government Services International Inc. Top agencies DOT (Department of Transportation) DTRA (Defense Threat Reduction Agency) Army (Department of the Army)	$111,964,138	0.7%	Rank history: #91 in FY2021, #68 in FY2022, #19 in FY2024 and #11 in FY2025; up 49 since FY2022.
20	Deloitte LLP 4 awardees, including Deloitte Consulting LLP, Deloitte & Touche LLP and Deloitte Financial Advisory Services LLP Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services) DOS (Department of State)	$99,902,484	0.7%	Rank history: #15 in FY2021, #18 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
21	The CNA Corporation Top agencies Navy (Department of the Navy) WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$98,207,076	0.6%	Rank history: #19 in FY2021, #20 in FY2022, #24 in FY2024 and #22 in FY2025; down 1 since FY2022.
22	Leidos Holdings, Inc. 7 awardees, including Leidos, Inc. Top agencies Army (Department of the Army) DHA (Defense Health Agency) OSD (Office of the Secretary of Defense)	$80,150,196	0.5%	Rank history: #24 in FY2021, #26 in FY2022, #29 in FY2024 and #37 in FY2025; up 4 since FY2022.
23	Palladium International LLC Top agencies USAID (US Agency for International Development)	$78,944,913	0.5%	Rank history: #22 in FY2021, #22 in FY2022, #45 in FY2024 and #48 in FY2025; down 1 since FY2022.
24	Quality Health Strategies Inc. Through Qlarant Integrity Solutions LLC Top agencies HHS (Department of Health and Human Services)	$73,426,908	0.5%	Rank history: #25 in FY2021, #24 in FY2022, #41 in FY2024 and not on the FY2025 list; unchanged since FY2022.
25	Lockheed Martin Corporation 5 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy)	$70,238,800	0.5%	Rank history: #64 in FY2021, not on the FY2022 list, #30 in FY2024 and #26 in FY2025; up 144 since FY2022.
26	Deloitte Consulting LLP Top agencies USAID (US Agency for International Development) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$68,662,652	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 101 since FY2022.
27	Medical Science & Computing, LLC Top agencies HHS (Department of Health and Human Services)	$65,021,242	0.4%	Rank history: #20 in FY2021, #25 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
28	Creative Associates International, Inc. Top agencies USAID (US Agency for International Development)	$64,161,681	0.4%	Rank history: #90 in FY2021, #37 in FY2022, #37 in FY2024 and not on the FY2025 list; up 9 since FY2022.
29	Novetta Solutions, LLC Through Accenture Federal Services LLC Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) DOS (Department of State)	$60,440,397	0.4%	Rank history: #49 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; up 14 since FY2022.
30	HP Enterprise Services LLC 3 awardees, including Safeguard Services LLC and Peraton Inc. Top agencies HHS (Department of Health and Human Services) DTRA (Defense Threat Reduction Agency) Navy (Department of the Navy)	$59,789,874	0.4%	Rank history: not on the FY2021 list, #31 in FY2022, #82 in FY2024 and not on the FY2025 list; up 1 since FY2022.
31	E3Health Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$58,016,680	0.4%	Rank history: not on the FY2021 list, #17 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
32	Noridian Mutual Insurance Company Through Noridian Healthcare Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$54,099,388	0.4%	Rank history: #23 in FY2021, #36 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
33	ICF International, Inc. 2 awardees, including ICF Macro Inc. and ICF Incorporated, L.L.C. Top agencies USAID (US Agency for International Development) EPA (Environmental Protection Agency) HHS (Department of Health and Human Services)	$53,869,113	0.4%	Rank history: #37 in FY2021, #45 in FY2022 and not on the FY2024–FY2025 lists; up 12 since FY2022.
34	DT Global LLC 2 awardees Top agencies USAID (US Agency for International Development) MCC (Millennium Challenge Corporation)	$53,683,385	0.4%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2024 and #71 in FY2025; new.
35	Tuvli LLC Top agencies DOS (Department of State)	$48,744,199	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 157 since FY2022.
36	Poplicus Incorporated Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$47,785,082	0.3%	Rank history: #67 in FY2021, #63 in FY2022, #23 in FY2024 and #39 in FY2025; up 27 since FY2022.
37	On Assignment, Inc. 2 awardees, including ECS Federal, LLC and Enterprise Resource Performance, LLC Top agencies DARPA (Defense Advanced Research Projects Agency) Commerce (Department of Commerce) HHS (Department of Health and Human Services)	$47,402,732	0.3%	Rank history: #89 in FY2021, #64 in FY2022 and not on the FY2024–FY2025 lists; up 27 since FY2022.
38	Science Applications International Corporation 5 awardees, including Forfeiture Support Associates LLC Top agencies PBGC (Pension Benefit Guaranty Corporation) DOJ (Department of Justice) DTRA (Defense Threat Reduction Agency)	$47,279,308	0.3%	Rank history: #30 in FY2021, #41 in FY2022, #47 in FY2024 and not on the FY2025 list; up 3 since FY2022.
39	BAE Systems PLC 2 awardees, including BAE Systems Technology Solutions & Services Inc. Top agencies DHS (Department of Homeland Security)	$46,004,071	0.3%	Rank history: #44 in FY2021, #38 in FY2022, #39 in FY2024 and not on the FY2025 list; down 1 since FY2022.
40	Westat, Inc. Top agencies HHS (Department of Health and Human Services)	$45,692,284	0.3%	Rank history: #32 in FY2021, #29 in FY2022, #67 in FY2024 and not on the FY2025 list; down 11 since FY2022.
41	National Collegiate Inventors & Innovators Alliance, Inc. Top agencies HHS (Department of Health and Human Services)	$45,688,704	0.3%	Rank history: #76 in FY2021, #40 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
42	Bluestaq LLC Top agencies USAF (Department of the Air Force)	$44,198,299	0.3%	Rank history: not on the FY2021 list, #44 in FY2022, #17 in FY2024 and #18 in FY2025; up 2 since FY2022.
43	Actionable Solutions Group, LLC Top agencies USSOCOM (United States Special Operations Command)	$43,923,751	0.3%	Rank history: #55 in FY2021, #34 in FY2022, #85 in FY2024 and #98 in FY2025; down 9 since FY2022.
44	Hendall Inc. Top agencies HHS (Department of Health and Human Services)	$42,462,303	0.3%	Rank history: #51 in FY2021, #49 in FY2022, #48 in FY2024 and #73 in FY2025; up 5 since FY2022.
45	Goldbelt, Incorporated 2 awardees, including Goldbelt C6, LLC and Goldbelt Professional Services, LLC Top agencies HHS (Department of Health and Human Services) DOS (Department of State)	$42,397,657	0.3%	Rank history: not on the FY2021 list, #66 in FY2022 and not on the FY2024–FY2025 lists; up 21 since FY2022.
46	Culmen International, LLC Top agencies DTRA (Defense Threat Reduction Agency) HHS (Department of Health and Human Services)	$42,119,844	0.3%	Rank history: not on the FY2021 list, #100 in FY2022 and not on the FY2024–FY2025 lists; up 54 since FY2022.
47	Strategic Analysis, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) OSD (Office of the Secretary of Defense)	$41,362,484	0.3%	Rank history: #74 in FY2021, #57 in FY2022, #33 in FY2024 and #20 in FY2025; up 10 since FY2022.
48	Systems Planning and Analysis, Inc. Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$40,870,817	0.3%	Rank history: #57 in FY2021, #65 in FY2022, #66 in FY2024 and #38 in FY2025; up 17 since FY2022.
49	Government of Canada Through Canadian Commercial Corporation Top agencies Army (Department of the Army)	$40,630,938	0.3%	Rank history: #95 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 107 since FY2022.
50	CACI International Inc. 4 awardees, including Caci, Inc. - Federal and Caci Nss, LLC Top agencies USSOCOM (United States Special Operations Command) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$39,322,440	0.3%	Rank history: #26 in FY2021, #35 in FY2022, #32 in FY2024 and #17 in FY2025; down 15 since FY2022.
51	Cyber Engineering and Technical Alliance, LLC Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) USAID (US Agency for International Development)	$37,933,973	0.2%	Rank history: not on the FY2021 list, #87 in FY2022, #40 in FY2024 and #33 in FY2025; up 36 since FY2022.
52	WWC Global LLC Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force) Army (Department of the Army)	$37,552,359	0.2%	Rank history: #39 in FY2021, #51 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
53	The Boeing Company 7 awardees, including Boeing Aerospace Operations, Inc., Jeppesen Foreflight, Inc. and Liquid Robotics, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOT (Department of Transportation)	$37,251,242	0.2%	Rank history: #46 in FY2021, #91 in FY2022, #55 in FY2024 and #53 in FY2025; up 38 since FY2022.
54	General Dynamics Corporation 8 awardees, including General Dynamics Information Technology, Inc., General Dynamics Mission Systems, Inc. and Electric Boat Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$36,354,518	0.2%	Rank history: #60 in FY2021, #52 in FY2022, #26 in FY2024 and #16 in FY2025; down 2 since FY2022.
55	Elizabeth Glaser Pediatric Aids Foundation Top agencies USAID (US Agency for International Development)	$35,387,191	0.2%	Rank history: not on the FY2021 list, #75 in FY2022, #52 in FY2024 and not on the FY2025 list; up 20 since FY2022.
56	Calibre Systems Inc. Top agencies Army (Department of the Army)	$35,136,641	0.2%	Rank history: #42 in FY2021, #67 in FY2022, #65 in FY2024 and #67 in FY2025; up 11 since FY2022.
57	Threat TEC - Yorktown JV, LLC Top agencies Army (Department of the Army)	$34,751,175	0.2%	Rank history: #48 in FY2021, #58 in FY2022, #50 in FY2024 and #96 in FY2025; up 1 since FY2022.
58	Population Services International Top agencies USAID (US Agency for International Development)	$34,536,809	0.2%	Rank history: #35 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 46 since FY2022.
59	Education Development Center, Inc. Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services)	$34,298,619	0.2%	Rank history: #41 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; down 26 since FY2022.
60	Jhpiego Corp Top agencies USAID (US Agency for International Development)	$33,724,251	0.2%	Rank history: not on the FY2021 list, #48 in FY2022, #100 in FY2024 and #55 in FY2025; down 12 since FY2022.
61	Agile Decision Sciences, LLC Top agencies EPA (Environmental Protection Agency) DHA (Defense Health Agency) DOJ (Department of Justice)	$32,921,242	0.2%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2024 and not on the FY2025 list; up 98 since FY2022.
62	Emsi Holding Company Through Coventbridge (USA) LLC Top agencies HHS (Department of Health and Human Services)	$31,564,172	0.2%	Rank history: #53 in FY2021, #60 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
63	Joint Medical Store Top agencies USAID (US Agency for International Development)	$31,172,799	0.2%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2024 and not on the FY2025 list; up 63 since FY2022.
64	Altamira Technologies Corporation Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) DTRA (Defense Threat Reduction Agency)	$30,967,052	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 37 since FY2022.
65	American Type Culture Collection Top agencies HHS (Department of Health and Human Services)	$29,958,481	0.2%	Rank history: #87 in FY2021, #54 in FY2022, #59 in FY2024 and not on the FY2025 list; down 11 since FY2022.
66	Linquest Corporation Top agencies USAF (Department of the Air Force)	$29,703,703	0.2%	Rank history: #81 in FY2021, #82 in FY2022, #75 in FY2024 and #63 in FY2025; up 16 since FY2022.
67	Nathan Associates LLC Top agencies USAID (US Agency for International Development) MCC (Millennium Challenge Corporation)	$29,229,365	0.2%	Rank history: #40 in FY2021, #61 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
68	Axle Informatics, LLC Top agencies HHS (Department of Health and Human Services)	$28,461,466	0.2%	Rank history: #69 in FY2021, #85 in FY2022, #27 in FY2024 and #61 in FY2025; up 17 since FY2022.
69	Management Sciences for Health Inc. Top agencies USAID (US Agency for International Development)	$28,420,461	0.2%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2024 and not on the FY2025 list; new.
70	Nova Global Supply and Services LLC Through Valiant Global Defense Services Inc. Top agencies DTRA (Defense Threat Reduction Agency) Army (Department of the Army) USAF (Department of the Air Force)	$28,217,871	0.2%	Rank history: #58 in FY2021, #88 in FY2022 and not on the FY2024–FY2025 lists; up 18 since FY2022.
71	Riverside Research Institute 2 awardees Top agencies USAF (Department of the Air Force)	$28,166,307	0.2%	Rank history: #63 in FY2021, #71 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
72	OST Inc. Top agencies DHS (Department of Homeland Security)	$28,141,245	0.2%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2024 and not on the FY2025 list; up 34 since FY2022.
73	National Academy of Sciences Top agencies NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$27,356,386	0.2%	Rank history: #93 in FY2021, not on the FY2022 list, #94 in FY2024 and not on the FY2025 list; up 39 since FY2022.
74	Health Care Service Corporation, A Mutual Legal Reserve Company Top agencies HHS (Department of Health and Human Services)	$27,070,200	0.2%	Rank history: not on the FY2021 list, #97 in FY2022, not on the FY2024 list and #65 in FY2025; up 23 since FY2022.
75	Eagle Integrated Services, LLC Top agencies USAF (Department of the Air Force)	$26,983,208	0.2%	Rank history: not on the FY2021 list, #72 in FY2022, #73 in FY2024 and #66 in FY2025; down 3 since FY2022.
76	Gzo, Inc. Top agencies USAF (Department of the Air Force)	$26,321,900	0.2%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2024 and not on the FY2025 list; up 200 since FY2022.
77	Connected Alliances LLC Top agencies USAF (Department of the Air Force)	$25,953,957	0.2%	Rank history: not on the FY2021 list, #62 in FY2022, #22 in FY2024 and #41 in FY2025; down 15 since FY2022.
78	Dexis Interactive Incorporated Top agencies USAID (US Agency for International Development) DSCA (Defense Security Cooperation Agency)	$25,836,193	0.2%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2024 and #54 in FY2025; new.
79	Mpf-Zai Solutions LLC Top agencies HHS (Department of Health and Human Services)	$25,007,979	0.2%	Rank history: not on the FY2021 list, #96 in FY2022, #77 in FY2024 and not on the FY2025 list; up 17 since FY2022.
80	Winrock International Institute for Agricultural Development Top agencies USAID (US Agency for International Development)	$24,960,701	0.2%	Rank history: #88 in FY2021, not on the FY2022 list, #84 in FY2024 and not on the FY2025 list; up 41 since FY2022.
81	Mipps, LLC Top agencies USDA (Department of Agriculture)	$24,900,000	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
82	National Marrow Donor Program Top agencies HHS (Department of Health and Human Services)	$24,863,151	0.2%	Rank history: not on the FY2021 list, #77 in FY2022, #81 in FY2024 and #68 in FY2025; down 5 since FY2022.
83	Blue Cross and Blue Shield of South Carolina Through Karna LLC Top agencies HHS (Department of Health and Human Services)	$24,810,782	0.2%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2024 and #42 in FY2025; new.
84	Planet Labs PBC 2 awardees, including Planet Labs Inc. Top agencies NASA (National Aeronautics and Space Administration)	$24,666,668	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 61 since FY2022.
85	American Institutes for Research In the Behavioral Sciences Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services) NSF (National Science Foundation)	$24,263,971	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 97 since FY2022.
86	Makwa Global Security Solutions, LLC Top agencies DOS (Department of State)	$24,203,747	0.2%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2024 and not on the FY2025 list; up 23 since FY2022.
87	Ultra Electronics Forensic Technology Inc Top agencies DOJ (Department of Justice)	$24,111,542	0.2%	Rank history: #65 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 15 since FY2022.
88	International Business Initiatives LLC Top agencies USAID (US Agency for International Development)	$23,752,876	0.2%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2024 and not on the FY2025 list; new.
89	Tetra TECH DRG JV, Inc. Top agencies USAID (US Agency for International Development)	$23,738,190	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 296 since FY2022.
90	UIC Government Services LLC 8 awardees, including Bowhead Mission Solutions, LLC, Bowhead Global Systems and Technology, LLC and Bowhead Professional and Technical Solutions LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$23,614,455	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 68 since FY2022.
91	National Association of State Mental Health Program Directors Inc. Top agencies HHS (Department of Health and Human Services)	$23,024,468	0.2%	Rank history: #92 in FY2021, #76 in FY2022, #92 in FY2024 and not on the FY2025 list; down 15 since FY2022.
92	Black & Veatch Special Projects Corp. Top agencies DTRA (Defense Threat Reduction Agency)	$22,990,182	0.2%	Rank history: #29 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 28 since FY2022.
93	Kaiser Foundation Health Plan of Washington Through Kaiser Foundation Hospitals Top agencies HHS (Department of Health and Human Services)	$22,762,365	0.1%	Rank history: #66 in FY2021, #81 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
94	Management & Training Corporation Through MTC International Development Holding Company, LLC Top agencies USAID (US Agency for International Development)	$22,513,736	0.1%	Rank history: #85 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
95	G D Arab Limited Company Top agencies Army (Department of the Army)	$22,237,608	0.1%	Rank history: not on the FY2021 list, #83 in FY2022, #86 in FY2024 and #90 in FY2025; down 12 since FY2022.
96	Gryphon Technologies, Inc. Through Schafer Government Services, LLC Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$22,229,486	0.1%	Rank history: #79 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 78 since FY2022.
97	People, Technology and Processes, LLC Top agencies USSOCOM (United States Special Operations Command)	$21,888,877	0.1%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2024 and #56 in FY2025; up 8 since FY2022.
98	Old Harbor Native Corporation 2 awardees, including Ocean Bay Information and Systems Management, LLC Top agencies DOJ (Department of Justice)	$21,428,133	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 83 since FY2022.
99	Oregon State of 3 awardees, including State of Oregon Department of Fish and Wildlife, Pacific States Marine Fisheries Commission and Oregon Health Authority-Public Health Top agencies Army (Department of the Army) Commerce (Department of Commerce) EPA (Environmental Protection Agency)	$21,364,037	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 49 since FY2022.
100	Chenega Enterprise Systems & Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$21,016,193	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 25 since FY2022.

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100 of 2,977 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 54199

Code	Net obligations	Largest contractor
541990 All Other Professional, Scientific, and Technical Services	$14,505,477,061	Battelle Energy Alliance, LLC

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $15.3 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.

Quick answers

Who were the top 10 NAICS 54199 contractors in FY2023?

1. Battelle Energy Alliance, LLC ($2.23B), 2. The Mitre Corporation ($1.02B), 3. Sierra Nevada Company, LLC ($733M), 4. Aevex Aerospace, LLC ($454M), 5. Oak Ridge Associated Universities, Incorporated ($405M), 6. DAI Global LLC ($351M), 7. Booz Allen Hamilton Holding Corporation ($243M), 8. Institute for Defense Analyses ($230M), 9. Chemonics International, Inc. ($226M), 10. The Johns Hopkins University ($225M).

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