Top 100 Contractors in NAICS 5416: Management, Scientific, and Technical Consulting Services, FY2024

Name: Top 100 Contractors in NAICS 5416: Management, Scientific, and Technical Consulting Services, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 25% of FY2024 NAICS 5416 contract dollars

Contract obligations: $24,219,615,548 Net of deobligations, by contracts coded NAICS 5416 or a code under it
Contractors: 5,664 Parent companies with an obligation
Largest contractor: Deployed Resources LLC $1.58 billion, 6.1% 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	Deployed Resources LLC Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$1,580,075,547	6.1%	Rank history: #5 in FY2021, #2 in FY2022, #1 in FY2023 and #5 in FY2025; unchanged since FY2023.
2	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$1,199,292,891	4.6%	Rank history: #1 in FY2021, #1 in FY2022, #2 in FY2023 and #1 in FY2025; unchanged since FY2023.
3	Deloitte 6 awardees, including Deloitte Consulting LLP, Deloitte Financial Advisory Services LLP and Deloitte & Touche LLP Top agencies Treasury (Department of the Treasury) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,175,203,983	4.5%	Rank history: #2 in FY2021, #3 in FY2022, #3 in FY2023 and #2 in FY2025; unchanged since FY2023.
4	Guidehouse Inc. 5 awardees, including Aptim Federal Services, LLC Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) DOS (Department of State)	$473,873,968	1.8%	Rank history: #7 in FY2021, #5 in FY2022, #4 in FY2023 and #6 in FY2025; unchanged since FY2023.
5	Booz Allen Hamilton Holding Corporation 3 awardees, including Booz Allen Hamilton Inc. Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services) Army (Department of the Army)	$459,016,335	1.8%	Rank history: #3 in FY2021, #4 in FY2022, #5 in FY2023 and #3 in FY2025; unchanged since FY2023.
6	General Dynamics Corporation 8 awardees, including General Dynamics Information Technology, Inc. and General Dynamics One Source LLC Top agencies DOS (Department of State) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$423,981,534	1.6%	Rank history: #4 in FY2021, #19 in FY2022, #6 in FY2023 and #4 in FY2025; unchanged since FY2023.
7	Lockheed Martin Corporation 11 awardees Top agencies Army (Department of the Army) MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$327,261,541	1.3%	Rank history: #12 in FY2021, #10 in FY2022, #10 in FY2023 and #7 in FY2025; up 3 since FY2023.
8	Livanta LLC Top agencies HHS (Department of Health and Human Services)	$314,839,247	1.2%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023 and not on the FY2025 list; up 53 since FY2023.
9	Keystone Peer Review Organization, LLC 2 awardees, including Ohio Kepro, LLC Top agencies HHS (Department of Health and Human Services)	$305,174,494	1.2%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023 and not on the FY2025 list; up 62 since FY2023.
10	Research Triangle Institute Top agencies HHS (Department of Health and Human Services) EPA (Environmental Protection Agency) DOJ (Department of Justice)	$218,067,516	0.8%	Rank history: #16 in FY2021, #15 in FY2022, #17 in FY2023 and #14 in FY2025; up 7 since FY2023.
11	Semanticbits LLC 2 awardees, including ICF Incorporated, L.L.C. Top agencies HHS (Department of Health and Human Services) EPA (Environmental Protection Agency) DOT (Department of Transportation)	$206,611,091	0.8%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2025; new.
12	Tetra Tech, Inc. 23 awardees, including Management Systems International, Inc. and Ard, Inc. Top agencies USAID (US Agency for International Development) EPA (Environmental Protection Agency) NASA (National Aeronautics and Space Administration)	$193,059,778	0.7%	Rank history: #18 in FY2021, #13 in FY2022, #15 in FY2023 and #16 in FY2025; up 3 since FY2023.
13	The Boston Consulting Group Inc 2 awardees, including BCG Federal Corp. Top agencies DHA (Defense Health Agency) Navy (Department of the Navy) Army (Department of the Army)	$179,967,489	0.7%	Rank history: #10 in FY2021, #14 in FY2022, #8 in FY2023 and not on the FY2025 list; down 5 since FY2023.
14	Serco Inc 2 awardees, including Whitney Bradley & Brown, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$167,244,153	0.6%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2023 and #11 in FY2025; up 30 since FY2023.
15	General Atomic Technologies Corporation 2 awardees, including General Atomics Aeronautical Systems, Inc. Top agencies USAF (Department of the Air Force)	$144,220,490	0.6%	Rank history: #29 in FY2021, #16 in FY2022, #25 in FY2023 and not on the FY2025 list; up 10 since FY2023.
16	The Mitre Corporation 2 awardees Top agencies Treasury (Department of the Treasury) OSD (Office of the Secretary of Defense) DHA (Defense Health Agency)	$137,746,293	0.5%	Rank history: #19 in FY2021, #17 in FY2022, #22 in FY2023 and #32 in FY2025; up 6 since FY2023.
17	BCG Federal Corp. Top agencies DHA (Defense Health Agency) Navy (Department of the Navy) OPM (Office of Personnel Management)	$130,969,271	0.5%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2025; new.
18	Mathematica Inc. 2 awardees Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) DOL (Department of Labor)	$129,374,250	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
19	Fluor Corporation Through Fluor Federal Services Inc. Top agencies DHS (Department of Homeland Security)	$128,830,100	0.5%	Rank history: #32 in FY2021, not on the FY2022 list, #23 in FY2023 and #12 in FY2025; up 4 since FY2023.
20	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior) HHS (Department of Health and Human Services)	$116,665,580	0.4%	Rank history: #61 in FY2021, #49 in FY2022, #39 in FY2023 and #41 in FY2025; up 19 since FY2023.
21	The Providencia Group LLC Top agencies HHS (Department of Health and Human Services)	$114,811,032	0.4%	Rank history: not on the FY2021 list, #36 in FY2022, #28 in FY2023 and not on the FY2025 list; up 7 since FY2023.
22	The Cadmus Group LLC 2 awardees Top agencies EPA (Environmental Protection Agency) DHS (Department of Homeland Security) USAID (US Agency for International Development)	$113,968,772	0.4%	Rank history: not on the FY2021–FY2022 lists, #45 in FY2023 and not on the FY2025 list; up 23 since FY2023.
23	Kelly Services, Inc. Top agencies HHS (Department of Health and Human Services)	$105,926,727	0.4%	Rank history: not on the FY2021–FY2023 lists and #21 in FY2025; new.
24	360 Patriot Enterprises LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$96,648,545	0.4%	Rank history: not on the FY2021 list, #39 in FY2022, #27 in FY2023 and #19 in FY2025; up 3 since FY2023.
25	Magellan Federal Inc. Top agencies Army (Department of the Army) DODEA (Department of Defense Education Activity) Navy (Department of the Navy)	$96,539,306	0.4%	Rank history: not on the FY2021–FY2023 lists and #31 in FY2025; new.
26	Accenture Federal Services LLC Top agencies OPM (Office of Personnel Management) USAF (Department of the Air Force) Army (Department of the Army)	$95,522,478	0.4%	Rank history: not on the FY2021–FY2023 lists and #22 in FY2025; new.
27	Strategic Resources, Incorporated Top agencies Army (Department of the Army)	$95,468,654	0.4%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2025; up 97 since FY2023.
28	Jacobs Government Services Company 3 awardees, including Ch2M Hill - CDM Pa-Tac Recovery Services, Jacobs Engineering Group Inc. and Amentum Technology, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army) USAF (Department of the Air Force)	$93,473,971	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
29	Aptive Resources LLC Top agencies OPM (Office of Personnel Management) VA (Department of Veterans Affairs) NSF (National Science Foundation)	$92,279,142	0.4%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2023 and not on the FY2025 list; up 17 since FY2023.
30	Gap Solutions, Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$87,280,569	0.3%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2025; new.
31	Westat, Inc. 2 awardees, including Insight Policy Research, Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) ED (Department of Education)	$86,456,484	0.3%	Rank history: #40 in FY2021, #50 in FY2022, #53 in FY2023 and not on the FY2025 list; up 22 since FY2023.
32	Leidos Holdings, Inc. 9 awardees, including Leidos, Inc. and Tetra Tech, Inc. Top agencies NASA (National Aeronautics and Space Administration) DOJ (Department of Justice) HHS (Department of Health and Human Services)	$83,731,336	0.3%	Rank history: #25 in FY2021, #24 in FY2022, #30 in FY2023 and #45 in FY2025; down 2 since FY2023.
33	Creative It Solutions LLC Top agencies DOS (Department of State)	$82,499,800	0.3%	Rank history: not on the FY2021 list, #67 in FY2022, #49 in FY2023 and #44 in FY2025; up 16 since FY2023.
34	Acumen LLC Top agencies HHS (Department of Health and Human Services)	$81,524,084	0.3%	Rank history: #35 in FY2021, #28 in FY2022, #35 in FY2023 and #43 in FY2025; up 1 since FY2023.
35	Human Technologies Corp Top agencies DOS (Department of State)	$81,086,599	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 161 since FY2023.
36	LMI Consulting, LLC Top agencies HHS (Department of Health and Human Services) OSD (Office of the Secretary of Defense) NASA (National Aeronautics and Space Administration)	$78,460,278	0.3%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023 and #37 in FY2025; up 24 since FY2023.
37	Hive Group, LLC Top agencies GSA (General Services Administration) DOJ (Department of Justice)	$77,958,509	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 64 since FY2023.
38	Titan Alpha LLC Top agencies VA (Department of Veterans Affairs)	$76,222,749	0.3%	Rank history: #77 in FY2021, #54 in FY2022, #68 in FY2023 and not on the FY2025 list; up 30 since FY2023.
39	Great Hill Solutions, LLC Top agencies DOS (Department of State) DSCA (Defense Security Cooperation Agency) HHS (Department of Health and Human Services)	$76,105,484	0.3%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023 and #42 in FY2025; up 12 since FY2023.
40	Kpmg LLP Top agencies DCSA (Defense Counterintelligence and Security Agency) USAF (Department of the Air Force) DISA (Defense Information Systems Agency)	$75,777,450	0.3%	Rank history: not on the FY2021–FY2023 lists and #99 in FY2025; new.
41	Management Analysis Technologies (Mat), Incorporated Top agencies Army (Department of the Army)	$75,156,300	0.3%	Rank history: #76 in FY2021, #72 in FY2022, #50 in FY2023 and #39 in FY2025; up 9 since FY2023.
42	Summome Native Ventures LLC Top agencies Treasury (Department of the Treasury) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$73,635,900	0.3%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2023 and not on the FY2025 list; up 13 since FY2023.
43	Ingenesis Inc. Through Kelly Services, Inc. Top agencies HHS (Department of Health and Human Services)	$72,979,427	0.3%	Rank history: #9 in FY2021, #9 in FY2022, #14 in FY2023 and not on the FY2025 list; down 29 since FY2023.
44	DAI Global LLC Top agencies USAID (US Agency for International Development)	$72,245,042	0.3%	Rank history: #91 in FY2021, not on the FY2022 list, #43 in FY2023 and #57 in FY2025; down 1 since FY2023.
45	Aptive HTG LLC Top agencies VA (Department of Veterans Affairs)	$72,109,630	0.3%	Rank history: #50 in FY2021, #37 in FY2022, #38 in FY2023 and #64 in FY2025; down 7 since FY2023.
46	American Institutes for Research In the Behavioral Sciences 2 awardees Top agencies HHS (Department of Health and Human Services) ED (Department of Education) DOL (Department of Labor)	$71,637,056	0.3%	Rank history: #59 in FY2021, #44 in FY2022, #54 in FY2023 and not on the FY2025 list; up 8 since FY2023.
47	Digital Mobilizations LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$69,850,354	0.3%	Rank history: not on the FY2021 list, #89 in FY2022, #91 in FY2023 and #94 in FY2025; up 44 since FY2023.
48	Maximus Federal Services, Inc. Top agencies HHS (Department of Health and Human Services)	$68,955,480	0.3%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2025; new.
49	Tunnell Consulting Inc. Top agencies HHS (Department of Health and Human Services)	$68,840,440	0.3%	Rank history: not on the FY2021–FY2023 lists and #55 in FY2025; new.
50	PAE Government Services Inc. 4 awardees Top agencies DOJ (Department of Justice) DOS (Department of State)	$65,404,446	0.3%	Rank history: #8 in FY2021, #6 in FY2022, #11 in FY2023 and not on the FY2025 list; down 39 since FY2023.
51	Amentum Holdings, Inc. 3 awardees, including PAE Government Services, Inc. and Amentum Services, Inc. Top agencies DOS (Department of State) DOJ (Department of Justice)	$64,358,724	0.2%	Rank history: not on the FY2021–FY2023 lists and #56 in FY2025; new.
52	Western Door Federal, LLC Top agencies DHA (Defense Health Agency) DOS (Department of State) DSCA (Defense Security Cooperation Agency)	$63,590,992	0.2%	Rank history: not on the FY2021 list, #83 in FY2022, not on the FY2023 list and #53 in FY2025; up 50 since FY2023.
53	Empower AI, Inc. Top agencies DISA (Defense Information Systems Agency) HHS (Department of Health and Human Services)	$60,932,766	0.2%	Rank history: not on the FY2021–FY2023 lists and #29 in FY2025; new.
54	Deloitte Consulting LLP 2 awardees Top agencies USAF (Department of the Air Force) Treasury (Department of the Treasury) HHS (Department of Health and Human Services)	$60,372,101	0.2%	Rank history: not on the FY2021 list, #7 in FY2022, #7 in FY2023 and not on the FY2025 list; down 47 since FY2023.
55	Tekpro Support Services, LLC Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$59,675,535	0.2%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and #59 in FY2025; up 29 since FY2023.
56	E.f. Kearney, Limited 2 awardees, including Kearney & Company, P.C. Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) HHS (Department of Health and Human Services)	$57,835,708	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
57	Goldschmitt and Associates LLC Top agencies SBA (Small Business Administration) DOT (Department of Transportation) Treasury (Department of the Treasury)	$57,795,945	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 69 since FY2023.
58	Education Development Center, Inc. Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$53,511,995	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 323 since FY2023.
59	Noblis, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army) GSA (General Services Administration)	$53,301,361	0.2%	Rank history: not on the FY2021 list, #65 in FY2022, #78 in FY2023 and #79 in FY2025; up 19 since FY2023.
60	System High Corporation Top agencies DARPA (Defense Advanced Research Projects Agency) MDA (DOD Missile Defense Agency)	$53,259,317	0.2%	Rank history: not on the FY2021 list, #82 in FY2022, #86 in FY2023 and #48 in FY2025; up 26 since FY2023.
61	Nakupuna Solutions, LLC Top agencies DOS (Department of State) Army (Department of the Army) WHS (DOD Washington Headquarters Service)	$53,004,062	0.2%	Rank history: #70 in FY2021, #91 in FY2022, #100 in FY2023 and #80 in FY2025; up 39 since FY2023.
62	Encompass LLC Top agencies USAID (US Agency for International Development)	$52,444,256	0.2%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023 and not on the FY2025 list; up 28 since FY2023.
63	Summit Consulting LLC Top agencies DFC (International Development Finance Corporation) ED (Department of Education) HUD (Department of Housing and Urban Development)	$52,332,973	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 90 since FY2023.
64	Project Enhancement Corporation Top agencies DOE (Department of Energy) DOL (Department of Labor)	$48,493,302	0.2%	Rank history: #84 in FY2021, #69 in FY2022, #57 in FY2023 and #54 in FY2025; down 7 since FY2023.
65	Palladium International LLC Top agencies USAID (US Agency for International Development)	$48,055,239	0.2%	Rank history: not on the FY2021 list, #46 in FY2022, not on the FY2023 list and not on the FY2025 list; up 80 since FY2023.
66	National Opinion Research Center Top agencies HHS (Department of Health and Human Services) NSF (National Science Foundation) USAID (US Agency for International Development)	$47,341,960	0.2%	Rank history: #27 in FY2021, #20 in FY2022, #33 in FY2023 and #84 in FY2025; down 33 since FY2023.
67	Eagle Hill Consulting LLC Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) GSA (General Services Administration)	$46,377,002	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 72 since FY2023.
68	Your Recruiting Company, Inc. Top agencies Commerce (Department of Commerce) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$46,123,412	0.2%	Rank history: #74 in FY2021, #63 in FY2022, #42 in FY2023 and not on the FY2025 list; down 26 since FY2023.
69	ABT Global LLC Top agencies HHS (Department of Health and Human Services) EPA (Environmental Protection Agency) USAID (US Agency for International Development)	$45,981,950	0.2%	Rank history: not on the FY2021–FY2023 lists and #70 in FY2025; new.
70	Union Station Venture, Ltd. 2 awardees, including Jones Lang Lasalle Americas, Inc. Top agencies USAF (Department of the Air Force) HUD (Department of Housing and Urban Development) SEC (Securities and Exchange Commission)	$45,410,709	0.2%	Rank history: #89 in FY2021, #79 in FY2022, #47 in FY2023 and not on the FY2025 list; down 23 since FY2023.
71	Resilience Action Partners Top agencies DHS (Department of Homeland Security)	$45,358,787	0.2%	Rank history: #47 in FY2021, #71 in FY2022, #67 in FY2023 and not on the FY2025 list; down 4 since FY2023.
72	Threat Tec, LLC Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force)	$45,078,978	0.2%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and #67 in FY2025; up 4 since FY2023.
73	Science Applications International Corporation 6 awardees Top agencies DHS (Department of Homeland Security) DOT (Department of Transportation) USAF (Department of the Air Force)	$43,944,583	0.2%	Rank history: #14 in FY2021, #27 in FY2022, #31 in FY2023 and not on the FY2025 list; down 42 since FY2023.
74	Parsons Corporation 2 awardees, including Parsons Government Services Inc. and Xator LLC Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce)	$43,642,935	0.2%	Rank history: #69 in FY2021, not on the FY2022–FY2023 lists and #13 in FY2025; up 129 since FY2023.
75	MEC Energy Services LLC Top agencies DOS (Department of State)	$43,430,052	0.2%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and not on the FY2025 list; up 19 since FY2023.
76	Calibre Systems Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) Navy (Department of the Navy)	$43,249,225	0.2%	Rank history: #54 in FY2021, #52 in FY2022, #66 in FY2023 and #81 in FY2025; down 10 since FY2023.
77	Analytic Services Inc. 2 awardees, including Professional, Acquisition, and Technical Services, Inc. Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army) USAF (Department of the Air Force)	$43,090,036	0.2%	Rank history: #65 in FY2021, #56 in FY2022, #62 in FY2023 and #82 in FY2025; down 15 since FY2023.
78	S C & A Inc. Top agencies EPA (Environmental Protection Agency) DOE (Department of Energy) DHS (Department of Homeland Security)	$42,506,936	0.2%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2025; up 326 since FY2023.
79	Unwin Co Top agencies DOE (Department of Energy)	$42,393,254	0.2%	Rank history: #60 in FY2021, #58 in FY2022, #79 in FY2023 and not on the FY2025 list; unchanged since FY2023.
80	Cathexis LLC Top agencies VA (Department of Veterans Affairs) WHS (DOD Washington Headquarters Service) DOT (Department of Transportation)	$41,709,888	0.2%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2025; new.
81	Kadiak LLC Top agencies DOE (Department of Energy) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$41,153,376	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
82	Family Health International Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development)	$41,019,288	0.2%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2025; up 145 since FY2023.
83	DT Global LLC Top agencies USAID (US Agency for International Development) MCC (Millennium Challenge Corporation)	$40,433,388	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 115 since FY2023.
84	ADC Ltd NM Top agencies DHS (Department of Homeland Security)	$40,381,880	0.2%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2025; up 21 since FY2023.
85	Endyna, Inc. Top agencies EPA (Environmental Protection Agency) HHS (Department of Health and Human Services) DOT (Department of Transportation)	$39,501,376	0.2%	Rank history: not on the FY2021–FY2023 lists and #76 in FY2025; new.
86	Danya International LLC Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$38,744,346	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
87	Amentum Services, Inc. 8 awardees, including PAE Government Services, Inc. and Centra Technology, Inc. Top agencies DOS (Department of State) DOJ (Department of Justice) Treasury (Department of the Treasury)	$38,594,395	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
88	C2C Innovative Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$38,533,430	0.1%	Rank history: not on the FY2021–FY2023 lists and #74 in FY2025; new.
89	Weston Solutions Holdings, Inc. 4 awardees, including Weston Solutions Inc. Top agencies EPA (Environmental Protection Agency) DOT (Department of Transportation)	$37,557,253	0.1%	Rank history: not on the FY2021 list, #93 in FY2022, not on the FY2023 list and #40 in FY2025; up 40 since FY2023.
90	JBS International, Inc. Top agencies HHS (Department of Health and Human Services) DOL (Department of Labor) CNCS (Corporation for National and Community Service)	$37,242,066	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 69 since FY2023.
91	Afognak Native Corporation 5 awardees, including Alutiiq Solutions, LLC, Alutiiq Management Services, LLC and "Alutiiq Logistics & Maintenance Services, Llc" Top agencies DOS (Department of State) Navy (Department of the Navy) DHA (Defense Health Agency)	$37,042,999	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 72 since FY2023.
92	Mantech International Corporation 2 awardees, including Mantech Advanced Systems International, Inc. and Mantech SRS Technologies, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$36,988,368	0.1%	Rank history: #41 in FY2021, #35 in FY2022, #48 in FY2023 and not on the FY2025 list; down 44 since FY2023.
93	Bryce Space and Technology, LLC Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$36,970,140	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 224 since FY2023.
94	Saliense Consulting LLC Top agencies USAID (US Agency for International Development) Commerce (Department of Commerce) DOJ (Department of Justice)	$36,402,418	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 62 since FY2023.
95	Trilogy Federal, LLC Top agencies VA (Department of Veterans Affairs)	$36,220,523	0.1%	Rank history: #52 in FY2021, #51 in FY2022, not on the FY2023 list and not on the FY2025 list; up 149 since FY2023.
96	C2 Alaska, LLC Top agencies SEC (Securities and Exchange Commission) USAF (Department of the Air Force) SSA (Social Security Administration)	$35,998,715	0.1%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2023 and #63 in FY2025; down 32 since FY2023.
97	Black Canyon Consulting LLC Top agencies HHS (Department of Health and Human Services)	$35,580,766	0.1%	Rank history: not on the FY2021–FY2023 lists and #46 in FY2025; up 10 since FY2023.
98	ICF International, Inc. 4 awardees, including ICF Incorporated, L.L.C., ICF Macro Inc. and ICF Resources, L.L.C. Top agencies EPA (Environmental Protection Agency) DOT (Department of Transportation) USDA (Department of Agriculture)	$35,126,842	0.1%	Rank history: #11 in FY2021, #8 in FY2022, #9 in FY2023 and not on the FY2025 list; down 89 since FY2023.
99	CDM Federal Programs Corporation Top agencies DHS (Department of Homeland Security) EPA (Environmental Protection Agency) Army (Department of the Army)	$35,098,654	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
100	CACI International Inc. 2 awardees, including Caci, Inc. - Federal Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$34,158,489	0.1%	Rank history: #48 in FY2021, #45 in FY2022, #72 in FY2023 and #91 in FY2025; down 28 since FY2023.

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100 of 5,664 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 5416

Code	Net obligations	Largest contractor
54161 Management Consulting Services	$20,339,371,596	Deployed Resources LLC
54169 Other Scientific and Technical Consulting Services	$2,429,480,094	Lockheed Martin Corporation
54162 Environmental Consulting Services	$1,450,763,858	Eastern Research Group Inc.

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 $25.9 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 5416 contractors in FY2024?

1. Deployed Resources LLC ($1.58B), 2. Chemonics International, Inc. ($1.2B), 3. Deloitte ($1.18B), 4. Guidehouse Inc. ($474M), 5. Booz Allen Hamilton Holding Corporation ($459M), 6. General Dynamics Corporation ($424M), 7. Lockheed Martin Corporation ($327M), 8. Livanta LLC ($315M), 9. Keystone Peer Review Organization, LLC ($305M), 10. Research Triangle Institute ($218M).

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