Top 100 Contractors in PSC R4: Professional Services, FY2022

Name: Top 100 Contractors in PSC R4: Professional Services, FY2022
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2021 – Sep 30, 2022 Code page on GovTribe

The top 10 won 19% of FY2022 PSC R4 contract dollars

Contract obligations: $75,806,951,993 Net of deobligations, by contracts coded PSC R4 or a code under it
Contractors: 13,111 Parent companies with an obligation
Largest contractor: Booz Allen Hamilton Holding Corporation $2.74 billion, 3.4% 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	Booz Allen Hamilton Holding Corporation 9 awardees, including Booz Allen Hamilton Inc., Liberty It Solutions LLC and Middle Bay Solutions II, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$2,737,410,137	3.4%	Rank history: #1 in FY2021, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2021.
2	Rapid Deployment Inc. Top agencies HHS (Department of Health and Human Services)	$1,784,574,415	2.2%	Rank history: #10 in FY2021, #23 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2021.
3	The Boeing Company 26 awardees Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command) Navy (Department of the Navy)	$1,689,156,871	2.1%	Rank history: #2 in FY2021, #2 in FY2023, #2 in FY2024 and #2 in FY2025; down 1 since FY2021.
4	General Dynamics Corporation 31 awardees, including General Dynamics Information Technology, Inc., General Dynamics Global Force, LLC and General Dynamics Land Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$1,538,238,659	1.9%	Rank history: #5 in FY2021, #3 in FY2023, #3 in FY2024 and #4 in FY2025; up 1 since FY2021.
5	Science Applications International Corporation 13 awardees, including Forfeiture Support Associates LLC and Engility Services, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$1,507,609,016	1.9%	Rank history: #7 in FY2021, #4 in FY2023, #5 in FY2024 and #7 in FY2025; up 2 since FY2021.
6	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$1,438,024,086	1.8%	Rank history: #4 in FY2021, #8 in FY2023, #8 in FY2024 and #13 in FY2025; down 2 since FY2021.
7	Lockheed Martin Corporation 33 awardees, including Lockheed Martin Services, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$1,366,299,398	1.7%	Rank history: #11 in FY2021, #5 in FY2023, #6 in FY2024 and #5 in FY2025; up 4 since FY2021.
8	RTX Corporation 57 awardees, including Raytheon Company and Rockwell Collins, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$1,253,999,323	1.6%	Rank history: #3 in FY2021, #13 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2021.
9	Northrop Grumman Corporation 47 awardees, including Northrop Grumman Systems Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$1,160,225,081	1.4%	Rank history: #8 in FY2021, #7 in FY2023, #10 in FY2024 and #9 in FY2025; down 1 since FY2021.
10	CACI International Inc. 21 awardees, including Caci, Inc. - Federal, Caci Nss, LLC and Caci Technologies, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DTRA (Defense Threat Reduction Agency)	$1,092,174,646	1.4%	Rank history: #13 in FY2021, #6 in FY2023, #7 in FY2024 and #3 in FY2025; up 3 since FY2021.
11	Deloitte LLP 7 awardees, including Deloitte Consulting LLP, Deloitte & Touche LLP and Sentek Consulting, Inc. Top agencies HHS (Department of Health and Human Services) Treasury (Department of the Treasury) DHS (Department of Homeland Security)	$1,067,370,202	1.3%	Rank history: #6 in FY2021, #11 in FY2023, #4 in FY2024 and #6 in FY2025; down 5 since FY2021.
12	Leidos Holdings, Inc. 24 awardees, including Leidos, Inc. and Aranea Solutions Inc. Top agencies Army (Department of the Army) USSOCOM (United States Special Operations Command) USAF (Department of the Air Force)	$1,056,873,654	1.3%	Rank history: #9 in FY2021, #10 in FY2023, #9 in FY2024 and #10 in FY2025; down 3 since FY2021.
13	The Aerospace Corporation Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce) DOI (Department of the Interior)	$1,052,159,733	1.3%	Rank history: #12 in FY2021, #9 in FY2023, #11 in FY2024 and #11 in FY2025; down 1 since FY2021.
14	The Mitre Corporation 2 awardees Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) HHS (Department of Health and Human Services)	$889,062,835	1.1%	Rank history: #15 in FY2021, #12 in FY2023, #14 in FY2024 and #20 in FY2025; up 1 since FY2021.
15	Maximus Inc. 6 awardees, including Maximus Federal Services, Inc., Maximus Federal Technology Solutions, LLC and Q2 Administrators, LLC Top agencies HHS (Department of Health and Human Services) WHS (DOD Washington Headquarters Service) Treasury (Department of the Treasury)	$757,230,105	0.9%	Rank history: #14 in FY2021, #14 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2021.
16	L3Harris Technologies, Inc. 32 awardees, including L3Harris Technologies Integrated Systems L.P., L3 Technologies, Inc. and CAE USA Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) USSOCOM (United States Special Operations Command)	$754,492,372	0.9%	Rank history: #17 in FY2021, #17 in FY2023, #24 in FY2024 and #23 in FY2025; up 1 since FY2021.
17	Serco North America (Holdings) Inc 4 awardees, including Serco Inc., Serco-Ips Corporation and Whitney Bradley & Brown, Inc. Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$726,768,735	0.9%	Rank history: #21 in FY2021, #32 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2021.
18	Mantech International Corporation 14 awardees, including Mantech Advanced Systems International, Inc., Mantech SRS Technologies, Inc. and Gryphon Technologies, L.C. Top agencies DOJ (Department of Justice) Army (Department of the Army) USAF (Department of the Air Force)	$722,573,949	0.9%	Rank history: #18 in FY2021, #42 in FY2023, #47 in FY2024 and #33 in FY2025; unchanged since FY2021.
19	Savannah River Mission Completion, LLC Top agencies DOE (Department of Energy)	$642,161,403	0.8%	Rank history: not on the FY2021 list, #16 in FY2023, #16 in FY2024 and #15 in FY2025; new.
20	BAE Systems PLC 19 awardees, including BAE Systems Information and Electronic Systems Integration Inc., BAE Systems Technology Solutions & Services Inc. and BAE Systems Land & Armaments L.P. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$611,748,083	0.8%	Rank history: #25 in FY2021, #15 in FY2023, #23 in FY2024 and #21 in FY2025; up 5 since FY2021.
21	Deloitte Consulting LLP 2 awardees Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) DHRA (Defense Human Resources Activity)	$596,020,332	0.7%	Rank history: not on the FY2021 list, #20 in FY2023, #67 in FY2024 and not on the FY2025 list; up 388 since FY2021.
22	Parsons Corporation 12 awardees, including Parsons Government Services Inc., Polaris Alpha, LLC and Ptsi Managed Services Inc. Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) Army (Department of the Army)	$591,112,231	0.7%	Rank history: #22 in FY2021, #19 in FY2023, #19 in FY2024 and #17 in FY2025; unchanged since FY2021.
23	HP Enterprise Services LLC 16 awardees, including Peraton Inc., Peraton Technology Services Inc. and Peraton Enterprise Solutions LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$538,776,157	0.7%	Rank history: #65 in FY2021, #22 in FY2023 and not on the FY2024–FY2025 lists; up 42 since FY2021.
24	Jacobs Engineering Group Inc. 23 awardees, including Amentum Technology, Inc., The Keyw Corporation and Ch2M Hill International Services, Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) Army (Department of the Army)	$527,168,994	0.7%	Rank history: #19 in FY2021, #28 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2021.
25	Mvm, Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$521,762,415	0.6%	Rank history: #29 in FY2021 and not on the FY2023–FY2025 lists; up 4 since FY2021.
26	Tetra Tech, Inc. 26 awardees, including Ard, Inc., Management Systems International, Inc. and Advanced Management Technology, Inc. Top agencies USAID (US Agency for International Development) DOS (Department of State) EPA (Environmental Protection Agency)	$476,224,522	0.6%	Rank history: #28 in FY2021, #27 in FY2023, #25 in FY2024 and #34 in FY2025; up 2 since FY2021.
27	Huntington Ingalls Industries, Inc. 9 awardees, including HII Mission Technologies Corp, HII Fleet Support Group LLC and Fulcrum It Services, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$453,694,455	0.6%	Rank history: #54 in FY2021, #21 in FY2023, #12 in FY2024 and #14 in FY2025; up 27 since FY2021.
28	Kbr, Inc. 11 awardees, including KBR Wyle Services, LLC, Kord Technologies, LLC and Avantus Federal LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) USAF (Department of the Air Force)	$450,848,763	0.6%	Rank history: #24 in FY2021, #24 in FY2023, #87 in FY2024 and not on the FY2025 list; down 4 since FY2021.
29	Guidehouse Inc. 4 awardees, including Guidehouse Digital LLC and Dovel Technologies LLC Top agencies DOS (Department of State) SBA (Small Business Administration) DHS (Department of Homeland Security)	$435,832,130	0.5%	Rank history: #23 in FY2021, #25 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2021.
30	Accenture Inc. Through Accenture Federal Services LLC Top agencies VA (Department of Veterans Affairs) Treasury (Department of the Treasury) ED (Department of Education)	$411,034,031	0.5%	Rank history: not on the FY2021 list, #18 in FY2023 and not on the FY2024–FY2025 lists; new.
31	The GEO Group, Inc. 2 awardees, including B.i. Incorporated Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$405,982,520	0.5%	Rank history: #42 in FY2021, #29 in FY2023, #34 in FY2024 and #40 in FY2025; up 11 since FY2021.
32	Amentum Services, Inc. 3 awardees, including URS Federal Services International, Inc. and Dyncorp International LLC Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$396,050,443	0.5%	Rank history: #20 in FY2021, #34 in FY2023 and not on the FY2024–FY2025 lists; down 12 since FY2021.
33	General Atomic Technologies Corporation 2 awardees, including General Atomics Aeronautical Systems, Inc. and General Atomics Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) DOE (Department of Energy)	$389,665,254	0.5%	Rank history: #26 in FY2021, #37 in FY2023, #40 in FY2024 and not on the FY2025 list; down 7 since FY2021.
34	AECOM 12 awardees, including JT4 LLC, AECOM Technical Services, Inc. and AECOM Usa, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DHS (Department of Homeland Security)	$372,640,430	0.5%	Rank history: #30 in FY2021, #26 in FY2023, #42 in FY2024 and not on the FY2025 list; down 4 since FY2021.
35	Accenture Federal Services LLC 5 awardees, including ASM Research, LLC and Avanade Inc. Top agencies Treasury (Department of the Treasury) ED (Department of Education) DHS (Department of Homeland Security)	$364,888,814	0.5%	Rank history: #16 in FY2021 and not on the FY2023–FY2025 lists; down 19 since FY2021.
36	The Interpublic Group of Companies Inc 4 awardees, including IPG Dxtra, Inc., True North Communications Inc. and Acxiom LLC Top agencies HHS (Department of Health and Human Services) DOS (Department of State)	$351,751,234	0.4%	Rank history: #27 in FY2021, #31 in FY2023, #39 in FY2024 and not on the FY2025 list; down 9 since FY2021.
37	DAI Global LLC Top agencies USAID (US Agency for International Development)	$340,704,304	0.4%	Rank history: #43 in FY2021, #30 in FY2023, #28 in FY2024 and #48 in FY2025; up 6 since FY2021.
38	General Dynamics Information Technology, Inc. 2 awardees Top agencies DOS (Department of State) HHS (Department of Health and Human Services) Commerce (Department of Commerce)	$327,590,309	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 117 since FY2021.
39	ICF International, Inc. 7 awardees, including ICF Incorporated, L.L.C., ICF Macro Inc. and Incentive Technology Group LLC Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development) EPA (Environmental Protection Agency)	$320,854,685	0.4%	Rank history: #33 in FY2021, #38 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2021.
40	ABT Global LLC 2 awardees Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services) ED (Department of Education)	$319,812,163	0.4%	Rank history: #32 in FY2021, #48 in FY2023, #45 in FY2024 and #56 in FY2025; down 8 since FY2021.
41	CGI Technologies and Solutions Inc. 2 awardees, including CGI Federal Inc. Top agencies DOS (Department of State) USAID (US Agency for International Development) EPA (Environmental Protection Agency)	$307,063,141	0.4%	Rank history: #61 in FY2021, #35 in FY2023 and not on the FY2024–FY2025 lists; up 20 since FY2021.
42	Aaski Technology Inc. 5 awardees, including Mag DS Corp and Ausley Associates, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$303,408,359	0.4%	Rank history: #57 in FY2021, #61 in FY2023 and not on the FY2024–FY2025 lists; up 15 since FY2021.
43	Michael Baker International, LLC 2 awardees, including Sallyport Global Holdings Inc. Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services) DOS (Department of State)	$293,416,210	0.4%	Rank history: #60 in FY2021, #40 in FY2023, #51 in FY2024 and not on the FY2025 list; up 17 since FY2021.
44	International Business Machines Corporation 5 awardees Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs) DMEA (Defense Microelectronics Activity)	$292,220,950	0.4%	Rank history: #47 in FY2021, #49 in FY2023, #50 in FY2024 and #52 in FY2025; up 3 since FY2021.
45	PAE Government Services Inc. 12 awardees, including PAE Professional Services, LLC, PAE National Security Solutions LLC and Centra Technology, Inc. Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security) DOS (Department of State)	$271,343,116	0.3%	Rank history: #35 in FY2021, #57 in FY2023 and not on the FY2024–FY2025 lists; down 10 since FY2021.
46	Research Triangle Institute 2 awardees, including International Resources Group Ltd. Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development) DOJ (Department of Justice)	$270,673,974	0.3%	Rank history: #39 in FY2021, #39 in FY2023, #30 in FY2024 and #60 in FY2025; down 7 since FY2021.
47	Smartronix LLC 2 awardees, including Datastrong, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) DOJ (Department of Justice)	$249,358,158	0.3%	Rank history: #63 in FY2021, #47 in FY2023 and not on the FY2024–FY2025 lists; up 16 since FY2021.
48	Oasis Systems, LLC Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) CFTC (Commodity Futures Trading Commission)	$247,105,116	0.3%	Rank history: #86 in FY2021, #62 in FY2023, #60 in FY2024 and #53 in FY2025; up 38 since FY2021.
49	Microsoft Corporation Top agencies Navy (Department of the Navy) Army (Department of the Army) DISA (Defense Information Systems Agency)	$247,008,713	0.3%	Rank history: #45 in FY2021, #50 in FY2023, #36 in FY2024 and #39 in FY2025; down 4 since FY2021.
50	Noblis, Inc. 2 awardees, including Noblis MSD LLC Top agencies DOT (Department of Transportation) Navy (Department of the Navy) DHS (Department of Homeland Security)	$239,445,718	0.3%	Rank history: #62 in FY2021, #46 in FY2023, #58 in FY2024 and #63 in FY2025; up 12 since FY2021.
51	Torch Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$236,796,631	0.3%	Rank history: #31 in FY2021, #43 in FY2023, #46 in FY2024 and #37 in FY2025; down 20 since FY2021.
52	H.i.g. Capital Management Inc. 4 awardees, including Iron Bow Technologies, LLC and Empower AI, Inc. Top agencies VA (Department of Veterans Affairs) OSD (Office of the Secretary of Defense) HHS (Department of Health and Human Services)	$226,101,191	0.3%	Rank history: #55 in FY2021, #68 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
53	Arctic Slope Regional Corporation 16 awardees, including Arctic Slope Technical Services, Inc., Netcentric Technology, LLC and Asrc Federal System Solutions LLC Top agencies DOT (Department of Transportation) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$223,607,125	0.3%	Rank history: #48 in FY2021, #64 in FY2023, #48 in FY2024 and #26 in FY2025; down 5 since FY2021.
54	DCS Corporation 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$221,043,249	0.3%	Rank history: #53 in FY2021, #54 in FY2023, #83 in FY2024 and #92 in FY2025; down 1 since FY2021.
55	Ingenesis Inc. Through Kelly Services, Inc. Top agencies HHS (Department of Health and Human Services) EEOC (Equal Employment Opportunity Commission)	$220,298,878	0.3%	Rank history: #44 in FY2021, #63 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2021.
56	Mathematica Inc 2 awardees Top agencies HHS (Department of Health and Human Services) ED (Department of Education) DOL (Department of Labor)	$210,863,672	0.3%	Rank history: #52 in FY2021, #66 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2021.
57	Credence Management Solutions Limited Liability Company Top agencies USAF (Department of the Air Force) USAID (US Agency for International Development) DHS (Department of Homeland Security)	$199,061,223	0.2%	Rank history: #68 in FY2021, #52 in FY2023, #49 in FY2024 and #55 in FY2025; up 11 since FY2021.
58	Vera Institute of Justice, Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$198,091,852	0.2%	Rank history: #56 in FY2021, #45 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2021.
59	The Providencia Group LLC Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$196,777,835	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
60	Westat, Inc. Top agencies HHS (Department of Health and Human Services) ED (Department of Education) DOL (Department of Labor)	$189,578,116	0.2%	Rank history: #77 in FY2021, #77 in FY2023, #54 in FY2024 and not on the FY2025 list; up 17 since FY2021.
61	Range Generation Next LLC Top agencies USAF (Department of the Air Force)	$186,201,877	0.2%	Rank history: #51 in FY2021, #51 in FY2023, #63 in FY2024 and not on the FY2025 list; down 10 since FY2021.
62	Nippon Telegraph and Telephone Corporation 3 awardees, including NTT Data Federal Services, Inc., NTT Data Services Federal Government, LLC and Docomo Pacific, Inc. Top agencies USAID (US Agency for International Development) DOJ (Department of Justice) Navy (Department of the Navy)	$179,373,622	0.2%	Rank history: #64 in FY2021 and not on the FY2023–FY2025 lists; up 2 since FY2021.
63	Koniag, Inc. 9 awardees, including Tuknik Government Services LLC, Eagle Harbor Solutions LLC and Pacarctic, LLC Top agencies DISA (Defense Information Systems Agency) DOS (Department of State) SBA (Small Business Administration)	$178,431,477	0.2%	Rank history: #84 in FY2021, #58 in FY2023 and not on the FY2024–FY2025 lists; up 21 since FY2021.
64	Life Science Logistics LLC Top agencies HHS (Department of Health and Human Services)	$177,917,625	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 49 since FY2021.
65	Triple Canopy Inc. 4 awardees, including Centerra Group, LLC, Academi Training Center LLC and Omniplex World Services Corporation Top agencies DOS (Department of State) DOE (Department of Energy) Commerce (Department of Commerce)	$177,451,675	0.2%	Rank history: #88 in FY2021 and not on the FY2023–FY2025 lists; up 23 since FY2021.
66	The Boston Consulting Group Inc 2 awardees, including BCG Federal Corp. Top agencies Navy (Department of the Navy) DHA (Defense Health Agency) Army (Department of the Army)	$172,131,268	0.2%	Rank history: #49 in FY2021, #36 in FY2023, #66 in FY2024 and not on the FY2025 list; down 17 since FY2021.
67	Governmentcio LLC 4 awardees, including Govcio, LLC, Salient Crgt, Inc. and Salient Federal-Sgis Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) PBGC (Pension Benefit Guaranty Corporation)	$171,213,498	0.2%	Rank history: not on the FY2021 list, #99 in FY2023 and not on the FY2024–FY2025 lists; up 138 since FY2021.
68	LMI Consulting, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$169,752,405	0.2%	Rank history: not on the FY2021 list, #74 in FY2023, #38 in FY2024 and #45 in FY2025; new.
69	Cognosante Holdings, LLC 3 awardees, including Cognosante MVH LLC and Cognosante, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) SSA (Social Security Administration)	$156,955,877	0.2%	Rank history: #75 in FY2021, #87 in FY2023, #90 in FY2024 and not on the FY2025 list; up 6 since FY2021.
70	Axient LLC 2 awardees, including Systems Engineering Group, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$156,142,220	0.2%	Rank history: #59 in FY2021 and not on the FY2023–FY2025 lists; down 11 since FY2021.
71	Grant Thornton International Ltd 2 awardees, including Grant Thornton LLP and Grant Thornton Public Sector LLC Top agencies DHS (Department of Homeland Security) DOS (Department of State) DOL (Department of Labor)	$155,893,814	0.2%	Rank history: #87 in FY2021 and not on the FY2023–FY2025 lists; up 16 since FY2021.
72	On Assignment, Inc. 8 awardees, including ECS Federal, LLC, Enterprise Resource Performance, LLC and Inforeliance LLC Top agencies DOJ (Department of Justice) DARPA (Defense Advanced Research Projects Agency) Treasury (Department of the Treasury)	$155,572,680	0.2%	Rank history: #70 in FY2021, #59 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2021.
73	Applied Research Associates, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) DTRA (Defense Threat Reduction Agency)	$154,509,201	0.2%	Rank history: not on the FY2021 list, #56 in FY2023, #72 in FY2024 and #76 in FY2025; up 36 since FY2021.
74	Georgia TECH Research Corp 2 awardees, including Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$154,421,999	0.2%	Rank history: #78 in FY2021, #80 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2021.
75	UnitedHealth Group Incorporated 6 awardees, including The Lewin Group, Inc., Optumhealth Care Solutions, LLC and Optumserve Technology Services, Inc. Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) VA (Department of Veterans Affairs)	$154,022,235	0.2%	Rank history: #90 in FY2021, not on the FY2023 list, #44 in FY2024 and #38 in FY2025; up 15 since FY2021.
76	Kpmg L.L.P. 2 awardees Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force) DCSA (Defense Counterintelligence and Security Agency)	$152,710,169	0.2%	Rank history: #96 in FY2021, #71 in FY2023 and not on the FY2024–FY2025 lists; up 20 since FY2021.
77	Alion Science and Technology Corporation 2 awardees, including HII Mission Technologies Corp Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$152,693,876	0.2%	Rank history: #38 in FY2021, #33 in FY2023 and not on the FY2024–FY2025 lists; down 39 since FY2021.
78	Systems Planning and Analysis, Inc. Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) DTRA (Defense Threat Reduction Agency)	$152,510,249	0.2%	Rank history: #93 in FY2021, #60 in FY2023, #53 in FY2024 and #42 in FY2025; up 15 since FY2021.
79	Inter-Con Security Systems, Inc. Top agencies DOS (Department of State) DOJ (Department of Justice) USDA (Department of Agriculture)	$146,034,753	0.2%	Rank history: #80 in FY2021, #97 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2021.
80	Cherokee Nation 12 awardees, including Cherokee Nation Strategic Programs, L.L.C., Cherokee Nation Management & Consulting, L.l.c.. and Cherokee Federal Solutions, L.L.C. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) Navy (Department of the Navy)	$142,203,208	0.2%	Rank history: #67 in FY2021, #78 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2021.
81	The Day & Zimmermann Group, Inc. Through SOC LLC Top agencies DOS (Department of State)	$141,246,987	0.2%	Rank history: #81 in FY2021 and not on the FY2023–FY2025 lists; unchanged since FY2021.
82	Sev1Tech, LLC 2 awardees, including Diamond Data Systems, L.L.C. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) Navy (Department of the Navy)	$140,154,503	0.2%	Rank history: #76 in FY2021, #73 in FY2023, #80 in FY2024 and #57 in FY2025; down 6 since FY2021.
83	LS Technologies LLC Top agencies DOT (Department of Transportation)	$139,662,484	0.2%	Rank history: #82 in FY2021, #92 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2021.
84	Nana Regional Corporation Inc 18 awardees, including Rivertech LLC, Tuvli LLC and Cloud Lake Technology LLC Top agencies DOS (Department of State) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$138,230,577	0.2%	Rank history: #58 in FY2021 and not on the FY2023–FY2025 lists; down 26 since FY2021.
85	ACE Info Solutions LLC 2 awardees, including Dovel Technologies LLC and Guidehouse Digital LLC Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$137,692,597	0.2%	Rank history: #74 in FY2021 and not on the FY2023–FY2025 lists; down 11 since FY2021.
86	Linquest Corporation 3 awardees, including The Perduco Group, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$137,088,500	0.2%	Rank history: #69 in FY2021, #70 in FY2023, #70 in FY2024 and #62 in FY2025; down 17 since FY2021.
87	Palladium International LLC Top agencies USAID (US Agency for International Development)	$132,741,527	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 25 since FY2021.
88	Leonardo S.p.A. 7 awardees, including DRS Network & Imaging Systems LLC, DRS Sustainment Systems, Inc. and Laurel Technologies Partnership Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$129,664,822	0.2%	Rank history: #85 in FY2021, #41 in FY2023, #57 in FY2024 and #31 in FY2025; down 3 since FY2021.
89	National Opinion Research Center Top agencies HHS (Department of Health and Human Services) EEOC (Equal Employment Opportunity Commission) CNCS (Corporation for National and Community Service)	$125,058,376	0.2%	Rank history: #99 in FY2021, #81 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2021.
90	Colsa Corp Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$123,046,360	0.2%	Rank history: #46 in FY2021, not on the FY2023 list, #96 in FY2024 and not on the FY2025 list; down 44 since FY2021.
91	Xator LLC 3 awardees, including Incadence Strategic Solutions LLC and TSM LLC Top agencies DOS (Department of State) USAF (Department of the Air Force) Navy (Department of the Navy)	$120,734,491	0.1%	Rank history: #72 in FY2021 and not on the FY2023–FY2025 lists; down 19 since FY2021.
92	Logistics Management Institute 2 awardees, including The Tauri Group, Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) OSD (Office of the Secretary of Defense)	$118,163,029	0.1%	Rank history: #41 in FY2021 and not on the FY2023–FY2025 lists; down 51 since FY2021.
93	Science Systems and Applications, Inc. Top agencies NASA (National Aeronautics and Space Administration) USDA (Department of Agriculture)	$115,679,669	0.1%	Rank history: #91 in FY2021 and not on the FY2023–FY2025 lists; down 2 since FY2021.
94	Afognak Native Corporation 13 awardees, including Alutiiq Essential Services LLC, Alutiiq Information Management, LLC and Shields Point LLC Top agencies DOS (Department of State) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$115,428,030	0.1%	Rank history: #98 in FY2021 and not on the FY2023–FY2025 lists; up 4 since FY2021.
95	Ernst & Young LLP 2 awardees Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$114,652,329	0.1%	Rank history: not on the FY2021 list, #53 in FY2023 and not on the FY2024–FY2025 lists; new.
96	SRC Inc. 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$110,876,661	0.1%	Rank history: not on the FY2021 list, #65 in FY2023, #41 in FY2024 and #58 in FY2025; up 8 since FY2021.
97	American Institutes for Research In the Behavioral Sciences 3 awardees, including Impaq International, LLC and Growth Transitions Inc. Top agencies ED (Department of Education) HHS (Department of Health and Human Services) DOL (Department of Labor)	$110,191,269	0.1%	Rank history: not on the FY2021 list, #93 in FY2023, #84 in FY2024 and not on the FY2025 list; up 31 since FY2021.
98	Heritage Health Solutions, Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$105,446,658	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
99	The Johns Hopkins University 3 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command) DHS (Department of Homeland Security)	$105,375,743	0.1%	Rank history: not on the FY2021 list, #82 in FY2023 and not on the FY2024–FY2025 lists; up 20 since FY2021.
100	Sapient Corporation 3 awardees, including Plowshare Group, Inc., Sapient Government Services, Inc. and Onpoint Consulting, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$105,305,671	0.1%	Rank history: #100 in FY2021, #95 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2021.

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100 of 13,111 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC R4

Code	Net obligations	Largest contractor
R425 Engineering and Technical Services	$29,100,282,434	Chemonics International, Inc.
R499 Other Professional Services	$24,059,940,542	Booz Allen Hamilton Holding Corporation
R408 Program Management/Support Services	$12,290,783,522	Booz Allen Hamilton Holding Corporation
R429 Support – Professional: Emergency Response/Disaster Planning/Preparedness Support	$2,949,264,030	Rapid Deployment Inc.
R410 Support – Professional: Program Evaluation/Review/Development	$1,163,178,889	Oasis Systems, LLC
R426 Communications Services	$996,287,583	The Interpublic Group of Companies Inc
R430 Support – Professional: Physical Security and Badging	$828,471,212	The Day & Zimmermann Group, Inc.
R418 Legal Services	$610,282,589	Vera Institute of Justice, Inc.
R431 Support – Professional: Human Resources	$597,858,014	Deloitte Consulting LLP
R405 Operations Research and Quantitative Analysis Services	$528,165,210	Leidos Holdings, Inc.
R497 Personal Services Contracts	$476,568,438	Iron Vine Security LLC
R423 Intelligence Services	$370,584,179	Actionable Solutions Group, LLC
R424 Expert Witness	$278,972,369	Georgia TECH Research Corp
R412 Simulation	$243,728,344	Northrop Grumman Corporation
R415 Technology Sharing/Utilization Services	$238,201,458	Accenture Federal Services LLC
R401 Personal Care Services (includes such services as barber and beauty shop, shoe repairs, tailoring, etc.)	$222,009,576	Mvm, Inc.
R422 Market Research and Public Opinion Services (includes telephone and field interviews, focus testing, and surveys)	$188,375,482	Westat, Inc.
R406 Policy Review/Development Services	$182,360,241	The Boston Consulting Group Inc
R416 Veterinary/Animal Care Services	$136,298,373	Michael Stapleton Associates, Ltd.
R427 Weather Reporting/Observation Services	$89,889,932	The Ibex Group Inc.
R420 Support – Professional: Certifications and Accreditations (Other Than Education or Information Technology C&A)	$68,386,207	Joint Commission On Accreditation of Healthcare Organizations
R404 Land Surveys, Cadastral Services (non-construction)	$46,208,862	Lumbee Tribe Enterprises LLC
R498 Patent and Trademark Services	$37,588,314	The Boeing Company
R402 Real Estate Brokerage Services	$37,207,089	Raine & Company, LLC
R411 Real Property Appraisals Services (SIC 6531)	$30,975,181	Verdi Consulting Inc.
R428 Industrial Hygienics	$20,419,312	Dexis Interactive LLC

Show all 26

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 $80.5 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 2022 ran Oct 1, 2021 – Sep 30, 2022. 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 FY2021. "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 FY2021 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 PSC R4 contractors in FY2022?

1. Booz Allen Hamilton Holding Corporation ($2.74B), 2. Rapid Deployment Inc. ($1.78B), 3. The Boeing Company ($1.69B), 4. General Dynamics Corporation ($1.54B), 5. Science Applications International Corporation ($1.51B), 6. Chemonics International, Inc. ($1.44B), 7. Lockheed Martin Corporation ($1.37B), 8. RTX Corporation ($1.25B), 9. Northrop Grumman Corporation ($1.16B), 10. CACI International Inc. ($1.09B).

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