Top 100 Contractors in PSC U0: Education and Training Services, FY2021

Name: Top 100 Contractors in PSC U0: Education and Training Services, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 24% of FY2021 PSC U0 contract dollars

Contract obligations: $4,386,997,714 Net of deobligations, by contracts coded PSC U0 or a code under it
Contractors: 3,566 Parent companies with an obligation
Largest contractor: Oak Ridge Associated Universities, Incorporated $274 million, 5.8% 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	Oak Ridge Associated Universities, Incorporated Top agencies DOE (Department of Energy) VA (Department of Veterans Affairs) NRC (Nuclear Regulatory Commission)	$273,832,042	5.8%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; up 2 since FY2020.
2	Northrop Grumman Corporation 4 awardees, including Vinnell Arabia, LLC and Northrop Grumman Systems Corporation Top agencies Army (Department of the Army) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$131,575,310	2.8%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
3	General Dynamics Corporation 9 awardees, including General Dynamics Information Technology, Inc., General Dynamics One Source LLC and General Dynamics Land Systems Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) Army (Department of the Army)	$110,750,354	2.4%	Rank history: #12 in FY2022, #6 in FY2023, #5 in FY2024 and #8 in FY2025; up 1 since FY2020.
4	Adams and Associates Inc. Top agencies DOL (Department of Labor)	$106,577,050	2.3%	Rank history: #7 in FY2022, #4 in FY2023, #3 in FY2024 and #2 in FY2025; up 6 since FY2020.
5	Powertrain, Inc. Top agencies OPM (Office of Personnel Management) USAF (Department of the Air Force) Navy (Department of the Navy)	$97,672,590	2.1%	Rank history: #6 in FY2022, #10 in FY2023, #23 in FY2024 and not on the FY2025 list; up 2 since FY2020.
6	Nova Global Supply and Services LLC 2 awardees, including Valiant Global Defense Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DFAS (Defense Finance and Accounting Service)	$96,910,990	2.1%	Rank history: #5 in FY2022, #3 in FY2023, #10 in FY2024 and not on the FY2025 list; down 1 since FY2020.
7	Amentum Services, Inc. 4 awardees, including URS Federal Services International, Inc. Top agencies Army (Department of the Army) DTRA (Defense Threat Reduction Agency) Navy (Department of the Navy)	$90,713,866	1.9%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; up 19 since FY2020.
8	OWL Companies Through Career Systems Development Corporation Top agencies DOL (Department of Labor)	$78,297,900	1.7%	Rank history: #14 in FY2022, #12 in FY2023, #26 in FY2024 and not on the FY2025 list; up 10 since FY2020.
9	Crew Training International, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOT (Department of Transportation)	$76,628,108	1.6%	Rank history: #26 in FY2022, not on the FY2023 list, #69 in FY2024 and #46 in FY2025; unchanged since FY2020.
10	Draken UK Bidco Limited 2 awardees, including Draken International, LLC and FR Aviation Limited Top agencies USAF (Department of the Air Force)	$72,647,250	1.6%	Rank history: #25 in FY2022, #23 in FY2023, #58 in FY2024 and #17 in FY2025; down 2 since FY2020.
11	CAE Inc. 9 awardees, including CAE Usa, Inc., CAE USA Mission Solutions Inc. and CAE Simuflite, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$71,270,463	1.5%	Rank history: #4 in FY2022, #7 in FY2023, #25 in FY2024 and not on the FY2025 list; up 3 since FY2020.
12	Airborne Tactical Advantage Co LLC Top agencies USAF (Department of the Air Force) DOT (Department of Transportation)	$67,568,414	1.4%	Rank history: #2 in FY2022 and not on the FY2023–FY2025 lists; down 6 since FY2020.
13	Management & Training Corporation Top agencies DOL (Department of Labor)	$56,064,684	1.2%	Rank history: #3 in FY2022, #2 in FY2023, #2 in FY2024 and #3 in FY2025; down 2 since FY2020.
14	Jacobs Engineering Group Inc. 3 awardees, including Amentum Technology, Inc. and Ch2M Hill, Inc. Top agencies Army (Department of the Army) DTRA (Defense Threat Reduction Agency) Navy (Department of the Navy)	$55,600,319	1.2%	Rank history: #13 in FY2022, #9 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
15	PKL Services, Inc. Top agencies USAF (Department of the Air Force)	$54,610,959	1.2%	Rank history: #15 in FY2022, #91 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
16	Serrato Corporation Top agencies DOL (Department of Labor)	$50,494,808	1.1%	Rank history: #9 in FY2022, #16 in FY2023, #9 in FY2024 and #14 in FY2025; up 29 since FY2020.
17	Berkshire Hathaway Inc. 2 awardees, including Flightsafety International Inc. and Flightsafety Defense Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$43,092,687	0.9%	Rank history: #18 in FY2022, #18 in FY2023, #33 in FY2024 and not on the FY2025 list; up 2 since FY2020.
18	International Business Machines Corporation 4 awardees Top agencies OPM (Office of Personnel Management) DHA (Defense Health Agency)	$41,736,449	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
19	Minact, Inc. Top agencies DOL (Department of Labor)	$41,141,493	0.9%	Rank history: #20 in FY2022 and not on the FY2023–FY2025 lists; up 12 since FY2020.
20	PAE Government Services, Inc. 5 awardees, including PAE National Security Solutions LLC and PAE Aviation and Technical Services LLC Top agencies DOS (Department of State) Army (Department of the Army) Navy (Department of the Navy)	$39,816,694	0.9%	Rank history: #19 in FY2022, #21 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
21	Education & Training Resources LLC Top agencies DOL (Department of Labor)	$37,320,437	0.8%	Rank history: #11 in FY2022, #5 in FY2023 and not on the FY2024–FY2025 lists; up 75 since FY2020.
22	Institute of International Education Inc. Top agencies DHRA (Defense Human Resources Activity)	$33,050,000	0.7%	Rank history: #23 in FY2022, #11 in FY2023, #19 in FY2024 and #31 in FY2025; new, not ranked in FY2020.
23	L3Harris Technologies, Inc. 6 awardees, including CAE USA Inc. and L3 Technologies, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOJ (Department of Justice)	$30,661,650	0.7%	Rank history: #60 in FY2022, #28 in FY2023, #40 in FY2024 and not on the FY2025 list; down 7 since FY2020.
24	ICF International, Inc. 2 awardees, including ICF Incorporated, L.L.C. Top agencies HHS (Department of Health and Human Services) CFPB (Consumer Financial Protection Bureau) DOT (Department of Transportation)	$30,311,943	0.6%	Rank history: #30 in FY2022, #32 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
25	Oak Grove Technologies, LLC Top agencies USSOCOM (United States Special Operations Command) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$29,913,556	0.6%	Rank history: #41 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
26	Aitc-Five Domains Joint Venture,Llc Top agencies Army (Department of the Army)	$29,028,304	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
27	Science Applications International Corporation 3 awardees, including Engility Services, LLC Top agencies Navy (Department of the Navy) DOS (Department of State) Army (Department of the Army)	$28,566,965	0.6%	Rank history: #27 in FY2022, #34 in FY2023, #31 in FY2024 and not on the FY2025 list; down 5 since FY2020.
28	Lockheed Martin Corporation 7 awardees, including Sikorsky Aircraft Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$28,291,471	0.6%	Rank history: #32 in FY2022, #37 in FY2023, not on the FY2024 list and #21 in FY2025; up 26 since FY2020.
29	Pinnacle Solutions, LLC Top agencies Army (Department of the Army)	$27,290,531	0.6%	Rank history: #33 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; down 12 since FY2020.
30	Warhorse Training Solutions, LLC Top agencies DOJ (Department of Justice)	$25,988,391	0.6%	Rank history: #17 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
31	Delaware Resource Group of Oklahoma LLC Top agencies USAF (Department of the Air Force)	$23,495,497	0.5%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
32	Odle Management Group, L.L.C. Top agencies DOL (Department of Labor)	$22,486,914	0.5%	Rank history: #29 in FY2022, #15 in FY2023, #74 in FY2024 and not on the FY2025 list; up 180 since FY2020.
33	Kratos Defense & Security Solutions, Inc. Through Kratos Technology & Training Solutions, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$21,768,740	0.5%	Rank history: not on the FY2022–FY2025 lists; down 13 since FY2020.
34	Booz Allen Hamilton Holding Corporation 3 awardees, including Booz Allen Hamilton Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$21,139,852	0.5%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; up 51 since FY2020.
35	ESG Aerosystems, Inc. Top agencies Navy (Department of the Navy)	$20,966,939	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	Kupono Government Services, LLC Top agencies DOE (Department of Energy)	$20,562,988	0.4%	Rank history: #34 in FY2022, #45 in FY2023, #41 in FY2024 and not on the FY2025 list; up 11 since FY2020.
37	RTX Corporation 7 awardees, including Raytheon Company, Goodrich Corporation and Nightwing Technologies, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$19,327,201	0.4%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
38	Linxx Global Solutions, LLC Top agencies Navy (Department of the Navy)	$19,301,391	0.4%	Rank history: #45 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
39	Davis Defense Group, Inc. Top agencies Navy (Department of the Navy)	$18,947,294	0.4%	Rank history: #39 in FY2022, #56 in FY2023, #55 in FY2024 and #44 in FY2025; new, not ranked in FY2020.
40	Metris LLC Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$17,923,932	0.4%	Rank history: #49 in FY2022, #46 in FY2023, #79 in FY2024 and #51 in FY2025; up 1 since FY2020.
41	Indtai, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$17,772,659	0.4%	Rank history: not on the FY2022–FY2025 lists; up 5 since FY2020.
42	STG International, Inc. Top agencies HHS (Department of Health and Human Services)	$17,731,468	0.4%	Rank history: #52 in FY2022, #61 in FY2023, #56 in FY2024 and #43 in FY2025; up 10 since FY2020.
43	Tactical Air Support, Inc. Top agencies USAF (Department of the Air Force)	$17,510,553	0.4%	Rank history: #42 in FY2022, #19 in FY2023, #16 in FY2024 and #16 in FY2025; down 13 since FY2020.
44	Tate, Incorporated Top agencies USAF (Department of the Air Force)	$16,922,954	0.4%	Rank history: #44 in FY2022, #68 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
45	Advanced Technology Systems Inc. 3 awardees, including Salient Federal-Sgis Inc., Salient Crgt, Inc. and Salient Federal Solutions, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$16,791,784	0.4%	Rank history: #22 in FY2022, #29 in FY2023 and not on the FY2024–FY2025 lists; up 86 since FY2020.
46	Home Builders Institute Top agencies DOL (Department of Labor)	$16,615,890	0.4%	Rank history: #31 in FY2022, #17 in FY2023, #36 in FY2024 and #65 in FY2025; down 11 since FY2020.
47	Town of Lincoln Town Hall Top agencies DODEA (Department of Defense Education Activity)	$16,587,336	0.4%	Rank history: #50 in FY2022, #59 in FY2023, #59 in FY2024 and #47 in FY2025; up 3 since FY2020.
48	Tyonek Native Corporatio Through Tyonek Global Services LLC Top agencies USAF (Department of the Air Force)	$16,465,486	0.4%	Rank history: #93 in FY2022 and not on the FY2023–FY2025 lists; down 20 since FY2020.
49	Techwerks LLC Top agencies VA (Department of Veterans Affairs)	$16,185,795	0.3%	Rank history: not on the FY2022–FY2025 lists; up 20 since FY2020.
50	Management Concepts, Inc. Top agencies Navy (Department of the Navy) DOL (Department of Labor) DHS (Department of Homeland Security)	$15,784,009	0.3%	Rank history: #66 in FY2022, #64 in FY2023, #78 in FY2024 and not on the FY2025 list; up 6 since FY2020.
51	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army) Navy (Department of the Navy)	$15,470,132	0.3%	Rank history: #28 in FY2022, #54 in FY2023, #52 in FY2024 and #76 in FY2025; down 27 since FY2020.
52	Ids International, LLC Top agencies DOS (Department of State)	$15,103,047	0.3%	Rank history: not on the FY2022–FY2023 lists, #99 in FY2024 and #73 in FY2025; down 8 since FY2020.
53	Research Triangle Institute Top agencies USAID (US Agency for International Development) IMLS (The Institute of Museum and Library Services) ED (Department of Education)	$14,945,259	0.3%	Rank history: #70 in FY2022, #53 in FY2023, #51 in FY2024 and not on the FY2025 list; up 17 since FY2020.
54	The Escal Institute of Advanced Technologies, Inc. Top agencies Army (Department of the Army) DOJ (Department of Justice) Navy (Department of the Navy)	$14,942,280	0.3%	Rank history: #56 in FY2022, #70 in FY2023 and not on the FY2024–FY2025 lists; down 20 since FY2020.
55	Creek Technologies Company Top agencies Navy (Department of the Navy)	$14,617,410	0.3%	Rank history: #55 in FY2022, not on the FY2023 list, #44 in FY2024 and #48 in FY2025; up 2 since FY2020.
56	Prevailance, Inc. Top agencies Navy (Department of the Navy)	$14,391,066	0.3%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; down 14 since FY2020.
57	Advanced Technology Leaders, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$14,361,458	0.3%	Rank history: #59 in FY2022 and not on the FY2023–FY2025 lists; up 69 since FY2020.
58	Tipping Point Solutions, Inc. Top agencies Army (Department of the Army) DOT (Department of Transportation) Navy (Department of the Navy)	$14,300,934	0.3%	Rank history: #58 in FY2022, #62 in FY2023, #97 in FY2024 and not on the FY2025 list; up 234 since FY2020.
59	Obsidian Solutions Group LLC Top agencies Navy (Department of the Navy)	$13,529,323	0.3%	Rank history: #96 in FY2022, #43 in FY2023, #65 in FY2024 and #99 in FY2025; up 46 since FY2020.
60	International Center for Language Studies, Inc. Top agencies DOS (Department of State) Army (Department of the Army) USAID (US Agency for International Development)	$13,515,245	0.3%	Rank history: not on the FY2022 list, #38 in FY2023, #34 in FY2024 and #34 in FY2025; down 33 since FY2020.
61	The Rockhill Group. Inc. Top agencies USAF (Department of the Air Force)	$13,376,076	0.3%	Rank history: #61 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
62	Allen Corporation of America, Inc. Top agencies DOT (Department of Transportation)	$13,306,281	0.3%	Rank history: #77 in FY2022, #78 in FY2023, #92 in FY2024 and #79 in FY2025; up 30 since FY2020.
63	Avix-Bgi JV LLC Top agencies USAF (Department of the Air Force)	$13,294,764	0.3%	Rank history: #64 in FY2022, #81 in FY2023, #67 in FY2024 and not on the FY2025 list; up 9 since FY2020.
64	The Masy Group LLC Top agencies DIA (Defense Intelligence Agency) Army (Department of the Army) HHS (Department of Health and Human Services)	$13,268,464	0.3%	Rank history: not on the FY2022–FY2025 lists; down 2 since FY2020.
65	Strategix Management LLC Top agencies DOL (Department of Labor)	$12,754,890	0.3%	Rank history: #43 in FY2022, #26 in FY2023, #21 in FY2024 and #20 in FY2025; new, not ranked in FY2020.
66	R3 Strategic Support Group Inc. Top agencies Navy (Department of the Navy)	$12,737,508	0.3%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; up 41 since FY2020.
67	Universities Space Research Association Top agencies NASA (National Aeronautics and Space Administration)	$12,208,225	0.3%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; up 12 since FY2020.
68	Black & Veatch Special Projects Corp. Top agencies DTRA (Defense Threat Reduction Agency)	$12,159,208	0.3%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
69	Phoenix Logistics, LLC Top agencies Army (Department of the Army)	$12,023,836	0.3%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
70	Sierra Nevada Company, LLC Top agencies USAF (Department of the Air Force)	$11,827,051	0.3%	Rank history: not on the FY2022–FY2025 lists; down 21 since FY2020.
71	Nana Regional Corporation Inc Through Rivertech LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$11,817,556	0.3%	Rank history: not on the FY2022–FY2025 lists; up 390 since FY2020.
72	UBC National Job Corps Training Fund Inc. Top agencies DOL (Department of Labor)	$11,767,941	0.3%	Rank history: #72 in FY2022, #24 in FY2023, #47 in FY2024 and #90 in FY2025; down 29 since FY2020.
73	Sonoran Technology & Professional Services LLC Top agencies USAF (Department of the Air Force)	$11,525,386	0.2%	Rank history: not on the FY2022–FY2025 lists; down 25 since FY2020.
74	T3I, Inc. Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command)	$11,480,245	0.2%	Rank history: #68 in FY2022, #73 in FY2023, #45 in FY2024 and #27 in FY2025; up 15 since FY2020.
75	Resicum International LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) USSOCOM (United States Special Operations Command)	$11,320,321	0.2%	Rank history: not on the FY2022–FY2024 lists and #45 in FY2025; down 2 since FY2020.
76	Blue Air Training Corp Top agencies USAF (Department of the Air Force)	$11,305,554	0.2%	Rank history: #38 in FY2022, #52 in FY2023, not on the FY2024 list and #36 in FY2025; down 18 since FY2020.
77	Corps Solutions LLC Top agencies Navy (Department of the Navy)	$11,276,052	0.2%	Rank history: #84 in FY2022, #89 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
78	Global Language Translation, Inc. Top agencies DOS (Department of State)	$10,995,594	0.2%	Rank history: not on the FY2022–FY2025 lists; down 13 since FY2020.
79	Mckellar Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$10,936,349	0.2%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
80	Solkoa Inc. Top agencies Army (Department of the Army)	$10,733,474	0.2%	Rank history: not on the FY2022–FY2025 lists; down 40 since FY2020.
81	Bluehalo LLC Top agencies Navy (Department of the Navy)	$10,618,589	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	BGI LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$10,594,255	0.2%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
83	TECH Wizards, Inc. Top agencies Navy (Department of the Navy)	$10,592,033	0.2%	Rank history: #67 in FY2022, #71 in FY2023, #64 in FY2024 and #97 in FY2025; up 108 since FY2020.
84	Kapili Services, LLC Top agencies DHA (Defense Health Agency)	$10,570,848	0.2%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
85	Potawatomi Business Development Corp 3 awardees, including 1Prospect Technologies, LLC Top agencies USSOCOM (United States Special Operations Command) Army (Department of the Army)	$10,484,193	0.2%	Rank history: not on the FY2022–FY2025 lists; down 17 since FY2020.
86	Cape Henry Associates, Inc. Top agencies Navy (Department of the Navy)	$10,369,125	0.2%	Rank history: #89 in FY2022 and not on the FY2023–FY2025 lists; up 95 since FY2020.
87	Caesar Rodney School District Top agencies DODEA (Department of Defense Education Activity)	$10,238,520	0.2%	Rank history: #88 in FY2022, not on the FY2023–FY2024 lists and #82 in FY2025; up 4 since FY2020.
88	Creative Associates International, Inc. Top agencies USAID (US Agency for International Development)	$10,210,225	0.2%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
89	Complete Parachute Solutions, Inc. Top agencies Navy (Department of the Navy)	$10,122,840	0.2%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; up 9 since FY2020.
90	National Plastering Industrys Joint Apprenticeship Trust Fund Top agencies DOL (Department of Labor)	$10,116,312	0.2%	Rank history: not on the FY2022 list, #66 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2020.
91	Network & Simulation Technologies Inc. Top agencies Navy (Department of the Navy)	$10,093,612	0.2%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
92	Aleut Aerospace Engineering, LLC Top agencies USAF (Department of the Air Force)	$10,028,737	0.2%	Rank history: #75 in FY2022, #100 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
93	George Washington University (The) 2 awardees Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$10,028,125	0.2%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
94	II Corps Consultants, Inc. Top agencies Navy (Department of the Navy) MCC (Millennium Challenge Corporation)	$9,737,738	0.2%	Rank history: not on the FY2022–FY2025 lists; down 31 since FY2020.
95	Kbr, Inc. 5 awardees, including KBR Wyle Services, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$9,723,106	0.2%	Rank history: not on the FY2022–FY2025 lists; up 176 since FY2020.
96	Viasat Inc. Top agencies USAF (Department of the Air Force)	$9,709,164	0.2%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
97	Tyonek Global Services LLC Top agencies USAF (Department of the Air Force)	$9,532,415	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Web Business Solutions Inc. Top agencies Navy (Department of the Navy)	$9,402,008	0.2%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
99	Huntington Ingalls Industries, Inc. 3 awardees, including HII Mission Technologies Corp and HII Fleet Support Group LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DSCA (Defense Security Cooperation Agency)	$9,339,432	0.2%	Rank history: #79 in FY2022, not on the FY2023 list, #62 in FY2024 and not on the FY2025 list; up 30 since FY2020.
100	Cybermedia Technologies, LLC Top agencies OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$9,060,155	0.2%	Rank history: #78 in FY2022 and not on the FY2023–FY2025 lists; up 32 since FY2020.

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100 of 3,566 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC U0

Code	Net obligations	Largest contractor
U099 Other Education and Training Services	$1,236,316,439	Oak Ridge Associated Universities, Incorporated
U008 Training/Curriculum Development	$785,117,248	Northrop Grumman Corporation
U009 Education Services	$756,066,189	Powertrain, Inc.
U006 Vocational/Technical	$749,306,079	Adams and Associates Inc.
U013 Education/Training – Combat	$344,841,473	Nova Global Supply and Services LLC
U005 Tuition, Registration, and Membership Fees	$214,469,684	University of San Diego
U012 ADP Software, Equipment, and Telecommunications Training	$87,306,162	Bluehalo LLC
U001 Lectures For Training	$57,251,122	International Business Machines Corporation
U004 Scientific and Management Education	$53,076,532	Black & Veatch Special Projects Corp.
U002 Personnel Testing	$33,621,142	Davis Defense Group, Inc.
U014 Education/Training – Security	$33,143,769	Mckellar Corporation
U010 Certifications and Accreditations for Educational Institutions	$15,846,098	BGI 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 $4.68 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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 U0 contractors in FY2021?

1. Oak Ridge Associated Universities, Incorporated ($274M), 2. Northrop Grumman Corporation ($132M), 3. General Dynamics Corporation ($111M), 4. Adams and Associates Inc. ($107M), 5. Powertrain, Inc. ($97.7M), 6. Nova Global Supply and Services LLC ($96.9M), 7. Amentum Services, Inc. ($90.7M), 8. OWL Companies ($78.3M), 9. Crew Training International, Inc. ($76.6M), 10. Draken UK Bidco Limited ($72.6M).

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