Top 100 Contractors in NAICS 5416: Management, Scientific, and Technical Consulting Services, FY2025

Name: Top 100 Contractors in NAICS 5416: Management, Scientific, and Technical Consulting Services, FY2025
Creator: GovTribe

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

The top 10 won 22% of FY2025 NAICS 5416 contract dollars

Contract obligations: $19,037,873,124 Net of deobligations, by contracts coded NAICS 5416 or a code under it
Contractors: 4,347 Parent companies with an obligation
Largest contractor: Chemonics International, Inc. $1.09 billion, 4.9% 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	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$1,086,386,166	4.9%	Rank history: #1 in FY2021, #1 in FY2022, #2 in FY2023 and #2 in FY2024; up 1 since FY2024.
2	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) DOS (Department of State) Treasury (Department of the Treasury)	$1,006,890,835	4.6%	Rank history: #2 in FY2021, #3 in FY2022, #3 in FY2023 and #3 in FY2024; up 1 since FY2024.
3	Booz Allen Hamilton Holding Corporation 2 awardees, including Booz Allen Hamilton Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$496,495,728	2.3%	Rank history: #3 in FY2021, #4 in FY2022, #5 in FY2023 and #5 in FY2024; up 2 since FY2024.
4	General Dynamics Corporation 6 awardees, including General Dynamics Information Technology, Inc., General Dynamics One Source LLC and Iron Eaglex, Inc. Top agencies DOS (Department of State) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$464,090,416	2.1%	Rank history: #4 in FY2021, #19 in FY2022, #6 in FY2023 and #6 in FY2024; up 2 since FY2024.
5	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	1.8%	Rank history: #5 in FY2021, #2 in FY2022, #1 in FY2023 and #1 in FY2024; down 4 since FY2024.
6	Guidehouse Inc. 5 awardees, including Guidehouse Digital LLC and Aptim Federal Services, LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) DOS (Department of State)	$363,405,772	1.7%	Rank history: #7 in FY2021, #5 in FY2022, #4 in FY2023 and #4 in FY2024; down 2 since FY2024.
7	Lockheed Martin Corporation 10 awardees Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense) MDA (DOD Missile Defense Agency)	$309,557,686	1.4%	Rank history: #12 in FY2021, #10 in FY2022, #10 in FY2023 and #7 in FY2024; unchanged since FY2024.
8	Acquisition Logistics LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$264,596,523	1.2%	Rank history: not on the FY2021–FY2024 lists; new.
9	BCG Federal Corp. Top agencies DHA (Defense Health Agency) Navy (Department of the Navy)	$232,411,479	1.1%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2024; up 8 since FY2024.
10	Family Health International Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services)	$226,610,873	1.0%	Rank history: not on the FY2021–FY2023 lists and #82 in FY2024; up 72 since FY2024.
11	Serco Inc Top agencies Army (Department of the Army) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$216,034,538	1.0%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2023 and #14 in FY2024; up 3 since FY2024.
12	Fluor Corporation Through Fluor Federal Services Inc. Top agencies DHS (Department of Homeland Security)	$206,604,488	0.9%	Rank history: #32 in FY2021, not on the FY2022 list, #23 in FY2023 and #19 in FY2024; up 7 since FY2024.
13	Parsons Corporation 3 awardees, including Parsons Government Services Inc. and Xator LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$152,123,993	0.7%	Rank history: #69 in FY2021, not on the FY2022–FY2023 lists and #74 in FY2024; up 61 since FY2024.
14	Research Triangle Institute Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development) EPA (Environmental Protection Agency)	$148,355,093	0.7%	Rank history: #16 in FY2021, #15 in FY2022, #17 in FY2023 and #10 in FY2024; down 4 since FY2024.
15	Safe America Media LLC Top agencies DHS (Department of Homeland Security)	$142,825,854	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
16	Tetra Tech, Inc. 20 awardees, including Management Systems International, Inc. and Ard, Inc. Top agencies EPA (Environmental Protection Agency) USAID (US Agency for International Development) NASA (National Aeronautics and Space Administration)	$142,724,926	0.6%	Rank history: #18 in FY2021, #13 in FY2022, #15 in FY2023 and #12 in FY2024; down 4 since FY2024.
17	General Atomics Aeronautical Systems, Inc. Top agencies USAF (Department of the Air Force)	$140,136,004	0.6%	Rank history: not on the FY2021–FY2024 lists; up 129 since FY2024.
18	Dewberry Engineers Inc. Top agencies DHS (Department of Homeland Security) USDA (Department of Agriculture) DOT (Department of Transportation)	$119,350,476	0.5%	Rank history: not on the FY2021–FY2024 lists; up 202 since FY2024.
19	360 Patriot Enterprises LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$113,668,623	0.5%	Rank history: not on the FY2021 list, #39 in FY2022, #27 in FY2023 and #24 in FY2024; up 5 since FY2024.
20	Semanticbits LLC Through ICF Incorporated, L.L.C. Top agencies HHS (Department of Health and Human Services) EPA (Environmental Protection Agency) DOT (Department of Transportation)	$107,839,881	0.5%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2024; down 9 since FY2024.
21	Kelly Services, Inc. Top agencies HHS (Department of Health and Human Services)	$105,890,884	0.5%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2024; up 2 since FY2024.
22	Accenture Federal Services LLC 3 awardees, including Cognosante, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) SSA (Social Security Administration)	$100,780,067	0.5%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2024; up 4 since FY2024.
23	Health Services Advisory Group, Inc. Top agencies HHS (Department of Health and Human Services) OPM (Office of Personnel Management)	$93,404,764	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
24	Superior Health Quality Alliance Inc. Top agencies HHS (Department of Health and Human Services)	$91,742,738	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
25	Strategic Resources, Incorporated Top agencies Army (Department of the Army)	$91,530,549	0.4%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; up 2 since FY2024.
26	Maximus Federal Services, Inc. Top agencies HHS (Department of Health and Human Services) OPM (Office of Personnel Management)	$90,160,270	0.4%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2024; up 22 since FY2024.
27	Terrestris, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$88,922,391	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
28	Science Applications International Corporation Top agencies WHS (DOD Washington Headquarters Service) DHS (Department of Homeland Security) OSD (Office of the Secretary of Defense)	$88,598,374	0.4%	Rank history: #14 in FY2021 and not on the FY2022–FY2024 lists; up 107 since FY2024.
29	Empower AI, Inc. Top agencies DISA (Defense Information Systems Agency) HHS (Department of Health and Human Services)	$87,155,435	0.4%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2024; up 24 since FY2024.
30	Ho-Chunk, Inc. 7 awardees, including All Native Synergies Company, Ho-Chunk Shared Services Company and HCI Management Services Company Top agencies DOS (Department of State) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$86,642,191	0.4%	Rank history: not on the FY2021–FY2024 lists; up 139 since FY2024.
31	Magellan Federal Inc. Top agencies DODEA (Department of Defense Education Activity) Army (Department of the Army) USAF (Department of the Air Force)	$78,869,971	0.4%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2024; down 6 since FY2024.
32	The Mitre Corporation Top agencies Treasury (Department of the Treasury) DHS (Department of Homeland Security) OSD (Office of the Secretary of Defense)	$78,798,352	0.4%	Rank history: #19 in FY2021, #17 in FY2022, #22 in FY2023 and #16 in FY2024; down 16 since FY2024.
33	ATI Government Solutions LLC Top agencies Treasury (Department of the Treasury) DOE (Department of Energy)	$78,554,618	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
34	People Who Think, L.L.C. Top agencies DHS (Department of Homeland Security)	$77,148,144	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
35	Health Quality Innovators Top agencies HHS (Department of Health and Human Services)	$76,635,445	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
36	TMF Health Quality Institute Top agencies HHS (Department of Health and Human Services)	$75,093,284	0.3%	Rank history: #46 in FY2021, #25 in FY2022 and not on the FY2023–FY2024 lists; returned.
37	LMI Consulting, LLC Top agencies HHS (Department of Health and Human Services) OSD (Office of the Secretary of Defense) DHS (Department of Homeland Security)	$74,326,471	0.3%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023 and #36 in FY2024; down 1 since FY2024.
38	Telligen, Inc. Top agencies HHS (Department of Health and Human Services)	$72,943,053	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
39	Management Analysis Technologies (Mat), Incorporated Top agencies Army (Department of the Army)	$70,032,799	0.3%	Rank history: #76 in FY2021, #72 in FY2022, #50 in FY2023 and #41 in FY2024; up 2 since FY2024.
40	Weston Solutions Holdings, Inc. 4 awardees, including Weston Solutions Inc. Top agencies EPA (Environmental Protection Agency) DOT (Department of Transportation)	$68,930,028	0.3%	Rank history: not on the FY2021 list, #93 in FY2022, not on the FY2023 list and #89 in FY2024; up 49 since FY2024.
41	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior) USDA (Department of Agriculture)	$68,609,415	0.3%	Rank history: #61 in FY2021, #49 in FY2022, #39 in FY2023 and #20 in FY2024; down 21 since FY2024.
42	Great Hill Solutions, LLC Top agencies DOS (Department of State) DSCA (Defense Security Cooperation Agency) USAID (US Agency for International Development)	$65,720,819	0.3%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023 and #39 in FY2024; down 3 since FY2024.
43	Acumen LLC Top agencies HHS (Department of Health and Human Services)	$61,791,325	0.3%	Rank history: #35 in FY2021, #28 in FY2022, #35 in FY2023 and #34 in FY2024; down 9 since FY2024.
44	Creative It Solutions LLC Top agencies DOS (Department of State)	$61,629,486	0.3%	Rank history: not on the FY2021 list, #67 in FY2022, #49 in FY2023 and #33 in FY2024; down 11 since FY2024.
45	Leidos Holdings, Inc. 6 awardees, including Leidos, Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAF (Department of the Air Force)	$60,794,901	0.3%	Rank history: #25 in FY2021, #24 in FY2022, #30 in FY2023 and #32 in FY2024; down 13 since FY2024.
46	Black Canyon Consulting LLC Top agencies HHS (Department of Health and Human Services)	$56,434,496	0.3%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2024; up 51 since FY2024.
47	Gap Solutions, Inc. Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) OSD (Office of the Secretary of Defense)	$56,161,929	0.3%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2024; down 17 since FY2024.
48	System High Corporation Top agencies DARPA (Defense Advanced Research Projects Agency) MDA (DOD Missile Defense Agency)	$55,085,294	0.3%	Rank history: not on the FY2021 list, #82 in FY2022, #86 in FY2023 and #60 in FY2024; up 12 since FY2024.
49	It Concepts, Inc. Top agencies USAID (US Agency for International Development) VA (Department of Veterans Affairs) Commerce (Department of Commerce)	$54,662,867	0.2%	Rank history: not on the FY2021–FY2024 lists; up 64 since FY2024.
50	Koniag, Inc. Through Kadiak LLC Top agencies HHS (Department of Health and Human Services) DOE (Department of Energy) DHS (Department of Homeland Security)	$54,568,625	0.2%	Rank history: #51 in FY2021, #32 in FY2022, #36 in FY2023 and not on the FY2024 list; up 270 since FY2024.
51	Mckinsey & Company, Inc. Washington D.c. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) DLA (Defense Logistics Agency)	$54,534,403	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
52	S & K Federal Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOE (Department of Energy)	$51,668,877	0.2%	Rank history: not on the FY2021–FY2024 lists; up 101 since FY2024.
53	Western Door Federal, LLC Top agencies DHA (Defense Health Agency) DOS (Department of State) Navy (Department of the Navy)	$50,437,098	0.2%	Rank history: not on the FY2021 list, #83 in FY2022, not on the FY2023 list and #52 in FY2024; down 1 since FY2024.
54	Project Enhancement Corporation Top agencies DOE (Department of Energy)	$48,281,552	0.2%	Rank history: #84 in FY2021, #69 in FY2022, #57 in FY2023 and #64 in FY2024; up 10 since FY2024.
55	Tunnell Consulting Inc. Top agencies HHS (Department of Health and Human Services)	$47,959,730	0.2%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2024; down 6 since FY2024.
56	Amentum Holdings, Inc. 9 awardees, including PAE Government Services, Inc. and Amentum Technology, Inc. Top agencies DOJ (Department of Justice) DOS (Department of State) Treasury (Department of the Treasury)	$46,711,996	0.2%	Rank history: not on the FY2021–FY2023 lists and #51 in FY2024; down 5 since FY2024.
57	DAI Global LLC Top agencies USAID (US Agency for International Development)	$46,604,766	0.2%	Rank history: #91 in FY2021, not on the FY2022 list, #43 in FY2023 and #44 in FY2024; down 13 since FY2024.
58	Arctic Slope Regional Corporation 7 awardees, including Asrc Federal Technology Solutions, LLC, Agile Decision Sciences, LLC and Broadleaf, Inc. Top agencies DHA (Defense Health Agency) Commerce (Department of Commerce) Navy (Department of the Navy)	$46,239,257	0.2%	Rank history: not on the FY2021–FY2024 lists; up 245 since FY2024.
59	Tekpro Support Services, LLC Top agencies DOJ (Department of Justice) Navy (Department of the Navy) WHS (DOD Washington Headquarters Service)	$45,724,476	0.2%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and #55 in FY2024; down 4 since FY2024.
60	Skyward Dynamics Information Technology, LLC Top agencies HHS (Department of Health and Human Services)	$45,350,640	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
61	Cbeyondata LLC Top agencies Army (Department of the Army) USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$45,288,065	0.2%	Rank history: not on the FY2021–FY2024 lists; up 420 since FY2024.
62	Lynker Corporation Top agencies Commerce (Department of Commerce)	$44,882,793	0.2%	Rank history: #95 in FY2021 and not on the FY2022–FY2024 lists; up 39 since FY2024.
63	C2 Alaska, LLC Top agencies SEC (Securities and Exchange Commission) SSA (Social Security Administration) USAF (Department of the Air Force)	$44,369,177	0.2%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2023 and #96 in FY2024; up 33 since FY2024.
64	Aptive HTG LLC Top agencies VA (Department of Veterans Affairs)	$43,281,886	0.2%	Rank history: #50 in FY2021, #37 in FY2022, #38 in FY2023 and #45 in FY2024; down 19 since FY2024.
65	Kaiva Strategies, LLC Top agencies HHS (Department of Health and Human Services)	$42,323,587	0.2%	Rank history: not on the FY2021–FY2024 lists; up 136 since FY2024.
66	Comagine Health Top agencies HHS (Department of Health and Human Services)	$42,203,934	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
67	Threat Tec, LLC Top agencies USSOCOM (United States Special Operations Command) Navy (Department of the Navy) Army (Department of the Army)	$41,738,276	0.2%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023 and #72 in FY2024; up 5 since FY2024.
68	Goldbelt Incorporated 4 awardees, including Goldbelt Glacier Health Services, LLC and CP Marine, LLC Top agencies Army (Department of the Army)	$41,620,888	0.2%	Rank history: not on the FY2021–FY2024 lists; up 189 since FY2024.
69	ManTech International Corporation 2 awardees, including Mantech Advanced Systems International, Inc. and Unison Software Inc. Top agencies USAF (Department of the Air Force)	$40,669,824	0.2%	Rank history: not on the FY2021–FY2024 lists; up 316 since FY2024.
70	ABT Global LLC Top agencies HHS (Department of Health and Human Services) EPA (Environmental Protection Agency) USAID (US Agency for International Development)	$40,664,192	0.2%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2024; down 1 since FY2024.
71	UnitedHealth Group Incorporated 3 awardees, including Optumserve Technology Services, Inc. and The Lewin Group, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$39,934,793	0.2%	Rank history: not on the FY2021–FY2024 lists; up 170 since FY2024.
72	Bowhead Enterprise, Science and Technology, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$39,932,054	0.2%	Rank history: not on the FY2021–FY2024 lists; up 108 since FY2024.
73	Tetra TECH ES, Inc. Top agencies USAID (US Agency for International Development) MCC (Millennium Challenge Corporation)	$39,207,751	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
74	C2C Innovative Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$39,103,314	0.2%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2024; up 14 since FY2024.
75	Procon Consulting LLC Top agencies GSA (General Services Administration) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$39,085,382	0.2%	Rank history: not on the FY2021–FY2024 lists; up 80 since FY2024.
76	Endyna, Inc. Top agencies EPA (Environmental Protection Agency)	$38,422,336	0.2%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2024; up 9 since FY2024.
77	Ernst & Young LLP 2 awardees Top agencies DOT (Department of Transportation) EXIM (Export Import Bank of the US)	$38,287,704	0.2%	Rank history: not on the FY2021–FY2024 lists; up 91 since FY2024.
78	S C & A Inc. Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior) DOE (Department of Energy)	$38,156,787	0.2%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2024; unchanged since FY2024.
79	Noblis, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army) Treasury (Department of the Treasury)	$38,099,091	0.2%	Rank history: not on the FY2021 list, #65 in FY2022, #78 in FY2023 and #59 in FY2024; down 20 since FY2024.
80	Nakupuna Solutions, LLC Top agencies DOS (Department of State) DOD (Department of Defense) WHS (DOD Washington Headquarters Service)	$37,080,266	0.2%	Rank history: #70 in FY2021, #91 in FY2022, #100 in FY2023 and #61 in FY2024; down 19 since FY2024.
81	Calibre Systems Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) OPM (Office of Personnel Management)	$37,023,122	0.2%	Rank history: #54 in FY2021, #52 in FY2022, #66 in FY2023 and #76 in FY2024; down 5 since FY2024.
82	Analytic Services Inc. Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army) WHS (DOD Washington Headquarters Service)	$35,296,923	0.2%	Rank history: #65 in FY2021, #56 in FY2022, #62 in FY2023 and #77 in FY2024; down 5 since FY2024.
83	Archetype III LLC Top agencies DOE (Department of Energy)	$35,165,402	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
84	National Opinion Research Center Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development) NSF (National Science Foundation)	$35,069,515	0.2%	Rank history: #27 in FY2021, #20 in FY2022, #33 in FY2023 and #66 in FY2024; down 18 since FY2024.
85	Cathexis LLC Top agencies VA (Department of Veterans Affairs) WHS (DOD Washington Headquarters Service) DOT (Department of Transportation)	$34,885,468	0.2%	Rank history: not on the FY2021–FY2023 lists and #80 in FY2024; down 5 since FY2024.
86	Total Computer Solutions, Inc. Top agencies Army (Department of the Army)	$34,726,764	0.2%	Rank history: not on the FY2021–FY2024 lists; up 23 since FY2024.
87	WSP USA Environment & Infrastructure Inc. Top agencies DHS (Department of Homeland Security) EPA (Environmental Protection Agency) DOI (Department of the Interior)	$34,432,724	0.2%	Rank history: not on the FY2021–FY2024 lists; up 147 since FY2024.
88	Chippewa Government Solutions, LLC Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$34,346,553	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
89	Battelle Memorial Institute Top agencies HHS (Department of Health and Human Services) DOT (Department of Transportation) DHS (Department of Homeland Security)	$34,207,569	0.2%	Rank history: not on the FY2021 list, #84 in FY2022 and not on the FY2023–FY2024 lists; up 44 since FY2024.
90	Island Peer Review Organization Inc. Top agencies HHS (Department of Health and Human Services)	$33,859,920	0.2%	Rank history: not on the FY2021 list, #53 in FY2022 and not on the FY2023–FY2024 lists; returned.
91	CACI International Inc. 3 awardees, including Caci, Inc. - Federal Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$33,542,507	0.2%	Rank history: #48 in FY2021, #45 in FY2022, #72 in FY2023 and #100 in FY2024; up 9 since FY2024.
92	ADC Ltd NM Top agencies DHS (Department of Homeland Security)	$33,467,939	0.2%	Rank history: not on the FY2021–FY2023 lists and #84 in FY2024; down 8 since FY2024.
93	Oak Ridge Associated Universities, Incorporated Top agencies NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$33,416,011	0.2%	Rank history: not on the FY2021–FY2024 lists; up 70 since FY2024.
94	Digital Mobilizations LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$33,302,068	0.2%	Rank history: not on the FY2021 list, #89 in FY2022, #91 in FY2023 and #47 in FY2024; down 47 since FY2024.
95	Michael Stapleton Associates, Ltd. Top agencies DOS (Department of State)	$32,787,264	0.1%	Rank history: #72 in FY2021 and not on the FY2022–FY2024 lists; up 13 since FY2024.
96	Professional Contract Services, Inc. Top agencies Navy (Department of the Navy)	$32,646,750	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
97	KBR Wyle Services LLC 3 awardees, including Dependable Global Solutions, LLC and KBR Services, LLC Top agencies DOE (Department of Energy) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$32,110,474	0.1%	Rank history: not on the FY2021–FY2024 lists; up 41 since FY2024.
98	Axle Informatics, LLC Top agencies HHS (Department of Health and Human Services)	$32,040,139	0.1%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2023 and not on the FY2024 list; up 21 since FY2024.
99	Kpmg LLP Top agencies USAF (Department of the Air Force) DCSA (Defense Counterintelligence and Security Agency) DLA (Defense Logistics Agency)	$31,857,664	0.1%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2024; down 59 since FY2024.
100	Tatitlek Federal Services LLC Top agencies DOS (Department of State) Navy (Department of the Navy) DOL (Department of Labor)	$31,697,662	0.1%	Rank history: not on the FY2021–FY2024 lists; up 36 since FY2024.

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100 of 4,347 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 5416

Code	Net obligations	Largest contractor
54161 Management Consulting Services	$15,684,772,176	Chemonics International, Inc.
54169 Other Scientific and Technical Consulting Services	$2,214,498,635	Parsons Corporation
54162 Environmental Consulting Services	$1,138,602,313	Tetra Tech, 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 $22 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 5416 contractors in FY2025?

1. Chemonics International, Inc. ($1.09B), 2. Deloitte ($1.01B), 3. Booz Allen Hamilton Holding Corporation ($496M), 4. General Dynamics Corporation ($464M), 5. Deployed Resources LLC ($406M), 6. Guidehouse Inc. ($363M), 7. Lockheed Martin Corporation ($310M), 8. Acquisition Logistics LLC ($265M), 9. BCG Federal Corp. ($232M), 10. Family Health International ($227M).

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