Top 100 Contractors in NAICS 81392: Professional Organizations, FY2021

Name: Top 100 Contractors in NAICS 81392: Professional Organizations, FY2021
Creator: GovTribe

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

The top 10 won 51% of FY2021 NAICS 81392 contract dollars

Contract obligations: $92,349,917 Net of deobligations, by contracts coded NAICS 81392 or a code under it
Contractors: 370 Parent companies with an obligation
Largest contractor: Joint Commission On Accreditation of Healthcare Organizations $16.4 million, 16.8% 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	Joint Commission On Accreditation of Healthcare Organizations Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$16,366,727	16.8%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since FY2020.
2	West Virginia Medical Institute Inc. Through Quality Insights, Inc. Top agencies VA (Department of Veterans Affairs)	$10,900,744	11.2%	Rank history: #3 in FY2022, #3 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
3	XL Associates, Inc. Top agencies USAID (US Agency for International Development)	$5,741,513	5.9%	Rank history: #5 in FY2022, #46 in FY2023, #17 in FY2024 and not on the FY2025 list; down 1 since FY2020.
4	Commission On Accreditation of Rehabilitation Facilities Top agencies VA (Department of Veterans Affairs)	$3,659,121	3.8%	Rank history: #15 in FY2022, #15 in FY2023, #5 in FY2024 and #5 in FY2025; new, not ranked in FY2020.
5	North American Association of Central Cancer Registries Inc. Top agencies HHS (Department of Health and Human Services)	$2,439,837	2.5%	Rank history: #6 in FY2022, #5 in FY2023, #6 in FY2024 and #6 in FY2025; up 2 since FY2020.
6	Sae International Top agencies DOT (Department of Transportation)	$2,414,882	2.5%	Rank history: #11 in FY2022, #12 in FY2023, #12 in FY2024 and #4 in FY2025; up 311 since FY2020.
7	National Association for Public Health Statistics and Information Systems, Inc. Top agencies HHS (Department of Health and Human Services) SSA (Social Security Administration) DCSA (Defense Counterintelligence and Security Agency)	$2,112,972	2.2%	Rank history: #14 in FY2022, #14 in FY2023, #8 in FY2024 and #15 in FY2025; up 4 since FY2020.
8	American Association for the Advancement of Science Top agencies DOS (Department of State) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$2,108,700	2.2%	Rank history: #12 in FY2022, #8 in FY2023, #14 in FY2024 and #19 in FY2025; up 1 since FY2020.
9	Nevada State Veterans Home Through Nevada System of Higher Education Top agencies Commerce (Department of Commerce)	$2,107,177	2.2%	Rank history: #8 in FY2022, #11 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
10	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$2,100,000	2.2%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
11	Michigan Peer Review Organization Top agencies VA (Department of Veterans Affairs)	$2,008,645	2.1%	Rank history: #10 in FY2022, #4 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
12	American College of Surgeons Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) Army (Department of the Army)	$1,842,196	1.9%	Rank history: #7 in FY2022, #18 in FY2023, #43 in FY2024 and #9 in FY2025; down 4 since FY2020.
13	American Board of Family Medicine Inc. Top agencies HHS (Department of Health and Human Services)	$1,473,888	1.5%	Rank history: #13 in FY2022, #13 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
14	Association of Public Health Laboratories, Inc. (The) Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,472,750	1.5%	Rank history: #9 in FY2022, #41 in FY2023, #32 in FY2024 and not on the FY2025 list; up 58 since FY2020.
15	Lumetra Healthcare Solutions Top agencies VA (Department of Veterans Affairs)	$1,454,665	1.5%	Rank history: #22 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
16	Reed Elsevier Inc. Through Elsevier B.V. Top agencies Navy (Department of the Navy)	$1,186,480	1.2%	Rank history: #17 in FY2022 and not on the FY2023–FY2025 lists; down 4 since FY2020.
17	The Linux Foundation Top agencies Navy (Department of the Navy)	$1,062,000	1.1%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
18	Provider Resources, LLC Top agencies VA (Department of Veterans Affairs)	$1,054,754	1.1%	Rank history: #19 in FY2022, #10 in FY2023, #7 in FY2024 and not on the FY2025 list; down 1 since FY2020.
19	The Texas A&M University System 2 awardees, including Texas A&M Transportation Institute and Texas A & M University Top agencies Commerce (Department of Commerce) EPA (Environmental Protection Agency) HHS (Department of Health and Human Services)	$864,244	0.9%	Rank history: #23 in FY2022, #16 in FY2023, #95 in FY2024 and not on the FY2025 list; up 26 since FY2020.
20	Cornell University Top agencies Commerce (Department of Commerce)	$845,921	0.9%	Rank history: #21 in FY2022, #17 in FY2023, #13 in FY2024 and #8 in FY2025; new, not ranked in FY2020.
21	Maximus Inc. Through Maximus Federal Services, Inc. Top agencies VA (Department of Veterans Affairs)	$829,453	0.9%	Rank history: #20 in FY2022, #9 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
22	University of Nebraska Through Board of Regents of the University of Nebraska Top agencies Commerce (Department of Commerce)	$799,500	0.8%	Rank history: #25 in FY2022, #20 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
23	Rtca Inc. Top agencies DOT (Department of Transportation) NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$751,668	0.8%	Rank history: #18 in FY2022, #37 in FY2023, #24 in FY2024 and #21 in FY2025; up 7 since FY2020.
24	Capital Factory Properties LLC Top agencies Army (Department of the Army)	$748,000	0.8%	Rank history: #26 in FY2022, #19 in FY2023, #15 in FY2024 and #11 in FY2025; down 5 since FY2020.
25	American Psychological Association Top agencies VA (Department of Veterans Affairs)	$731,222	0.7%	Rank history: not on the FY2022 list, #31 in FY2023, #34 in FY2024 and #22 in FY2025; down 5 since FY2020.
26	National Academy of Sciences Top agencies USAF (Department of the Air Force) DOI (Department of the Interior) HHS (Department of Health and Human Services)	$685,553	0.7%	Rank history: #32 in FY2022, #28 in FY2023, #25 in FY2024 and not on the FY2025 list; down 16 since FY2020.
27	University of North Carolina at Chapel Hill Top agencies Commerce (Department of Commerce)	$622,452	0.6%	Rank history: #28 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
28	The Institute of Electrical and Electronics Engineers Incorp Through Institute of Electrical & Electronics Engineers Inc. Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency) DHS (Department of Homeland Security)	$606,180	0.6%	Rank history: #33 in FY2022, #36 in FY2023, #46 in FY2024 and not on the FY2025 list; down 6 since FY2020.
29	Accreditation Association for Ambulatory Health Care, Inc. Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security)	$602,594	0.6%	Rank history: #24 in FY2022, not on the FY2023 list, #39 in FY2024 and #29 in FY2025; up 10 since FY2020.
30	The Standard Bank of South Africa Ltd Top agencies DOS (Department of State)	$579,997	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	Purdue University Top agencies Commerce (Department of Commerce)	$565,123	0.6%	Rank history: #29 in FY2022, #21 in FY2023, #19 in FY2024 and #17 in FY2025; up 182 since FY2020.
32	Deloitte LLP Through Deloitte Consulting LLP Top agencies DOE (Department of Energy)	$555,615	0.6%	Rank history: not on the FY2022 list, #32 in FY2023 and not on the FY2024–FY2025 lists; up 39 since FY2020.
33	American Association of Blood Banks, Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force) Army (Department of the Army)	$526,397	0.5%	Rank history: #36 in FY2022, #38 in FY2023, #33 in FY2024 and #26 in FY2025; down 9 since FY2020.
34	Academy Health Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$521,527	0.5%	Rank history: #16 in FY2022, #30 in FY2023, #16 in FY2024 and #27 in FY2025; down 20 since FY2020.
35	Cabell Publishing Co Top agencies USDA (Department of Agriculture)	$489,130	0.5%	Rank history: not on the FY2022–FY2023 lists, #60 in FY2024 and #38 in FY2025; new, not ranked in FY2020.
36	Institute of Transportation Engineers, Inc. Top agencies DOT (Department of Transportation)	$463,288	0.5%	Rank history: #4 in FY2022, #7 in FY2023, #11 in FY2024 and #16 in FY2025; new, not ranked in FY2020.
37	Maximus Federal Services, Inc. Top agencies VA (Department of Veterans Affairs)	$410,117	0.4%	Rank history: not on the FY2022–FY2023 lists, #9 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
38	Military Operations Research Society, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$372,079	0.4%	Rank history: #43 in FY2022, #44 in FY2023, #38 in FY2024 and #25 in FY2025; down 11 since FY2020.
39	National Association of School Nurses, Incorporated Top agencies HHS (Department of Health and Human Services)	$354,882	0.4%	Rank history: #44 in FY2022, #43 in FY2023, #44 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
40	Standards Coordinating Body for Gene Cell & Regenerative Medicines Top agencies Commerce (Department of Commerce)	$349,357	0.4%	Rank history: #48 in FY2022, #55 in FY2023, #86 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
41	American College of Preventive Medicine, Inc. (The) Top agencies VA (Department of Veterans Affairs)	$344,646	0.4%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; down 10 since FY2020.
42	Society of General Internal Medicine Top agencies VA (Department of Veterans Affairs)	$332,000	0.3%	Rank history: #46 in FY2022 and not on the FY2023–FY2025 lists; down 8 since FY2020.
43	Healthcare Information and Management Systems Society Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$326,745	0.3%	Rank history: #60 in FY2022, #61 in FY2023, #80 in FY2024 and #48 in FY2025; down 37 since FY2020.
44	Asis International Inc. Top agencies OSD (Office of the Secretary of Defense) DHS (Department of Homeland Security)	$317,128	0.3%	Rank history: not on the FY2022–FY2024 lists and #76 in FY2025; up 35 since FY2020.
45	The Conference Board, Inc. Top agencies DHRA (Defense Human Resources Activity)	$302,014	0.3%	Rank history: #49 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
46	American College of Medical Toxicology Incorporated Top agencies HHS (Department of Health and Human Services)	$300,000	0.3%	Rank history: #41 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2020.
47	Accreditation Council for Graduate Medical Education Top agencies USUHS (DOD Uniformed Services University of the Health Sciences) VA (Department of Veterans Affairs)	$294,200	0.3%	Rank history: #51 in FY2022, #39 in FY2023, #37 in FY2024 and #30 in FY2025; up 233 since FY2020.
48	Open Geospatial Consortium Inc. Top agencies DOI (Department of the Interior) DISA (Defense Information Systems Agency)	$290,857	0.3%	Rank history: #80 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; down 22 since FY2020.
49	Partnership for Public Service Inc. Top agencies DOT (Department of Transportation) DOI (Department of the Interior) Treasury (Department of the Treasury)	$262,588	0.3%	Rank history: #75 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
50	International Association of Fire Chiefs, Inc. Top agencies DHS (Department of Homeland Security)	$248,426	0.3%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; down 12 since FY2020.
51	Vlogic Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$247,966	0.3%	Rank history: #54 in FY2022, #58 in FY2023, #51 in FY2024 and #32 in FY2025; new, not ranked in FY2020.
52	Strategic Innovative Solutions LLC Top agencies HHS (Department of Health and Human Services)	$246,807	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
53	American College of Emergency Physicians Top agencies HHS (Department of Health and Human Services)	$245,000	0.3%	Rank history: #63 in FY2022, #67 in FY2023, #52 in FY2024 and #39 in FY2025; new, not ranked in FY2020.
54	Ceati International Inc. Top agencies DOI (Department of the Interior) DOE (Department of Energy) DHS (Department of Homeland Security)	$241,000	0.2%	Rank history: #59 in FY2022, #59 in FY2023, #54 in FY2024 and #33 in FY2025; down 17 since FY2020.
55	Sinclair Broadcast Group Inc. Through Politico, LLC Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$240,086	0.2%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
56	Jolicoeur Jean Top agencies USAID (US Agency for International Development)	$224,857	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
57	American Society of Addiction Medicine Inc. Top agencies HHS (Department of Health and Human Services)	$220,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Juice Consulting LLC Top agencies OSD (Office of the Secretary of Defense)	$218,200	0.2%	Rank history: #27 in FY2022, #54 in FY2023, #21 in FY2024 and #41 in FY2025; down 26 since FY2020.
59	PQA Inc. Top agencies HHS (Department of Health and Human Services)	$214,200	0.2%	Rank history: #61 in FY2022, #63 in FY2023, #56 in FY2024 and not on the FY2025 list; down 15 since FY2020.
60	University of Texas System 3 awardees, including University of Texas At Austin, The University of Texas Health Science Center At San Antonio and The Univeristy of Texas M.d. Anderson Cancer Center Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce) GSA (General Services Administration)	$211,325	0.2%	Rank history: #42 in FY2022, #34 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
61	Air Force Sergeants Association Top agencies USAF (Department of the Air Force)	$209,500	0.2%	Rank history: #47 in FY2022, #47 in FY2023, #40 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
62	Hydropower Research Institute Top agencies DOI (Department of the Interior)	$200,000	0.2%	Rank history: #40 in FY2022, #50 in FY2023, not on the FY2024 list and #40 in FY2025; down 20 since FY2020.
63	International Association of Firefighters Top agencies DHS (Department of Homeland Security)	$199,894	0.2%	Rank history: #65 in FY2022, not on the FY2023 list, #55 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
64	Association of American Medical Colleges Top agencies VA (Department of Veterans Affairs) USUHS (DOD Uniformed Services University of the Health Sciences)	$191,190	0.2%	Rank history: #57 in FY2022 and not on the FY2023–FY2025 lists; up 11 since FY2020.
65	National Center for State Courts Top agencies DOJ (Department of Justice)	$186,956	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	National Contract Management Association Top agencies VA (Department of Veterans Affairs) HUD (Department of Housing and Urban Development) DOT (Department of Transportation)	$180,195	0.2%	Rank history: #52 in FY2022, #70 in FY2023, #45 in FY2024 and #86 in FY2025; up 113 since FY2020.
67	The National Registry of Emergency Medical Technicians Inc. Top agencies USAF (Department of the Air Force)	$178,500	0.2%	Rank history: not on the FY2022 list, #48 in FY2023, #49 in FY2024 and #46 in FY2025; new, not ranked in FY2020.
68	Gartner, Inc. Top agencies DOT (Department of Transportation)	$177,593	0.2%	Rank history: #45 in FY2022, #33 in FY2023, #26 in FY2024 and #53 in FY2025; down 25 since FY2020.
69	Mckinsey & Company, Inc. Through Mckinsey & Company, Inc. Washington D.c. Top agencies USAID (US Agency for International Development)	$170,152	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	National Law Enforcement Telecommunication System (Nlets), Inc. Top agencies USAF (Department of the Air Force) DOJ (Department of Justice)	$168,420	0.2%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
71	Acog Foundation Top agencies HHS (Department of Health and Human Services)	$164,000	0.2%	Rank history: #55 in FY2022, #56 in FY2023, #48 in FY2024 and not on the FY2025 list; down 14 since FY2020.
72	Haseya LLC Top agencies USAGM (US Agency for Global Media)	$163,500	0.2%	Rank history: #39 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
73	Alliance for Telecommunications Industry Solutions Inc. Top agencies DOT (Department of Transportation) Commerce (Department of Commerce) DOJ (Department of Justice)	$158,374	0.2%	Rank history: #84 in FY2022, #83 in FY2023, #76 in FY2024 and #43 in FY2025; unchanged since FY2020.
74	Atlas Executive Consultant LLC Top agencies NASA (National Aeronautics and Space Administration)	$155,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	American Academy of Family Physicians Top agencies Navy (Department of the Navy)	$153,753	0.2%	Rank history: not on the FY2022 list, #74 in FY2023, #68 in FY2024 and not on the FY2025 list; down 24 since FY2020.
76	Society of Photo-Optical Instrumentation Engineers Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$150,785	0.2%	Rank history: #78 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
77	Our Community Salutes - Usa, Inc. Top agencies Navy (Department of the Navy)	$150,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Ihlenfeld Brian L Top agencies DHA (Defense Health Agency)	$149,760	0.2%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; down 23 since FY2020.
79	Mgma-Acmpe Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$146,000	0.1%	Rank history: #69 in FY2022, #71 in FY2023, #62 in FY2024 and #36 in FY2025; down 12 since FY2020.
80	National Society of Black Engineers Top agencies Navy (Department of the Navy) DOS (Department of State) NASA (National Aeronautics and Space Administration)	$143,500	0.1%	Rank history: #58 in FY2022, #66 in FY2023, not on the FY2024 list and #89 in FY2025; up 83 since FY2020.
81	Chinaunicom Beijing Branch Top agencies DOS (Department of State)	$143,244	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	American National Standards Institute Incorporated Top agencies Commerce (Department of Commerce) HHS (Department of Health and Human Services) DISA (Defense Information Systems Agency)	$141,675	0.1%	Rank history: #70 in FY2022, #42 in FY2023, #36 in FY2024 and #94 in FY2025; down 23 since FY2020.
83	Academy of Nutrition & Dietetics Top agencies HHS (Department of Health and Human Services)	$132,400	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	The Chenega Corporation Through Chenega Worldwide Support, LLC Top agencies USAID (US Agency for International Development)	$126,079	0.1%	Rank history: not on the FY2022–FY2025 lists; down 43 since FY2020.
85	American Association for Laboratory Accreditation, Inc. Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services) Army (Department of the Army)	$125,237	0.1%	Rank history: #79 in FY2022, #81 in FY2023, #61 in FY2024 and #35 in FY2025; down 33 since FY2020.
86	Organisation for Economic Cooperation and Development Top agencies NASA (National Aeronautics and Space Administration)	$125,000	0.1%	Rank history: not on the FY2022–FY2023 lists, #72 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
87	Jeffery Max Hill Top agencies USDA (Department of Agriculture)	$113,600	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	American Society for Radiation Oncology Top agencies VA (Department of Veterans Affairs)	$110,500	0.1%	Rank history: #93 in FY2022, #79 in FY2023, #82 in FY2024 and #44 in FY2025; new, not ranked in FY2020.
89	International Electrical Testing Association Top agencies Army (Department of the Army)	$109,360	0.1%	Rank history: #83 in FY2022, #77 in FY2023, #64 in FY2024 and #49 in FY2025; down 33 since FY2020.
90	Research Methods International Top agencies USAID (US Agency for International Development)	$106,697	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	Association for Prevention Teaching and Research Top agencies HHS (Department of Health and Human Services)	$104,545	0.1%	Rank history: #86 in FY2022, #94 in FY2023, #92 in FY2024 and not on the FY2025 list; down 10 since FY2020.
92	Abera Bekele Leta Top agencies USAID (US Agency for International Development)	$104,155	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Object Management Group Inc. Top agencies NASA (National Aeronautics and Space Administration) Commerce (Department of Commerce) VA (Department of Veterans Affairs)	$101,400	0.1%	Rank history: #90 in FY2022, #96 in FY2023, #71 in FY2024 and #98 in FY2025; down 19 since FY2020.
94	Medical Center Alliance Top agencies VA (Department of Veterans Affairs)	$100,000	0.1%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; down 11 since FY2020.
95	Adroitz Consultants Limited Top agencies HHS (Department of Health and Human Services)	$98,993	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	Organis Cooperation Developp Economiqu Through Organisation for Economic Cooperation and Development Top agencies USDA (Department of Agriculture)	$98,696	0.1%	Rank history: not on the FY2022–FY2025 lists; down 33 since FY2020.
97	Serkalem Bekele Zewdie Top agencies USAID (US Agency for International Development)	$96,411	0.1%	Rank history: not on the FY2022–FY2025 lists; down 2 since FY2020.
98	American Public Health Association Top agencies HHS (Department of Health and Human Services)	$95,000	0.1%	Rank history: not on the FY2022 list, #91 in FY2023 and not on the FY2024–FY2025 lists; down 30 since FY2020.
99	Fundacion Paraguaya De Cooperacion Y Desarrollo Top agencies USAID (US Agency for International Development)	$90,116	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Amouzgar Yeganeh Top agencies DOS (Department of State)	$90,000	0.1%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.

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100 of 370 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 81392

Code	Net obligations	Largest contractor
813920 Professional Organizations	$92,349,917	Joint Commission On Accreditation of Healthcare Organizations

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 $97.5 million 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 NAICS 81392 contractors in FY2021?

1. Joint Commission On Accreditation of Healthcare Organizations ($16.4M), 2. West Virginia Medical Institute Inc. ($10.9M), 3. XL Associates, Inc. ($5.74M), 4. Commission On Accreditation of Rehabilitation Facilities ($3.66M), 5. North American Association of Central Cancer Registries Inc. ($2.44M), 6. Sae International ($2.41M), 7. National Association for Public Health Statistics and Information Systems, Inc. ($2.11M), 8. American Association for the Advancement of Science ($2.11M), 9. Nevada State Veterans Home ($2.11M), 10. Chemonics International, Inc. ($2.1M).

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