Top 100 Contractors in NAICS 8139: Business, Professional, Labor, Political, and Similar Organizations, FY2023

Name: Top 100 Contractors in NAICS 8139: Business, Professional, Labor, Political, and Similar Organizations, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 49% of FY2023 NAICS 8139 contract dollars

Contract obligations: $124,329,378 Net of deobligations, by contracts coded NAICS 8139 or a code under it
Contractors: 450 Parent companies with an obligation
Largest contractor: General Dynamics Corporation $22.8 million, 16.1% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies DHA (Defense Health Agency) USUHS (DOD Uniformed Services University of the Health Sciences) USAF (Department of the Air Force)	$22,823,071	16.1%	Rank history: not on the FY2021 list, #1 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	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)	$17,188,922	12.1%	Rank history: #1 in FY2021, #2 in FY2022, #2 in FY2024 and #2 in FY2025; unchanged since FY2022.
3	West Virginia Medical Institute Inc. Through Quality Insights, Inc. Top agencies VA (Department of Veterans Affairs)	$8,920,751	6.3%	Rank history: #2 in FY2021, #3 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
4	Michigan Peer Review Organization Top agencies VA (Department of Veterans Affairs)	$3,627,387	2.6%	Rank history: #12 in FY2021, #11 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
5	Naval Academy Athletic Association Top agencies Navy (Department of the Navy)	$3,517,907	2.5%	Rank history: #5 in FY2021, #5 in FY2022, #55 in FY2024 and #4 in FY2025; unchanged since FY2022.
6	North American Association of Central Cancer Registries Inc. Top agencies HHS (Department of Health and Human Services)	$3,354,279	2.4%	Rank history: #6 in FY2021, #7 in FY2022, #6 in FY2024 and #7 in FY2025; up 1 since FY2022.
7	Lumetra Healthcare Solutions Top agencies VA (Department of Veterans Affairs)	$2,642,884	1.9%	Rank history: #16 in FY2021, #23 in FY2022 and not on the FY2024–FY2025 lists; up 16 since FY2022.
8	Institute of Transportation Engineers, Inc. Top agencies DOT (Department of Transportation)	$2,631,694	1.9%	Rank history: #41 in FY2021, #4 in FY2022, #11 in FY2024 and #18 in FY2025; down 4 since FY2022.
9	American Association for the Advancement of Science Top agencies DOS (Department of State) HHS (Department of Health and Human Services) Treasury (Department of the Treasury)	$2,341,649	1.6%	Rank history: #8 in FY2021, #12 in FY2022, #14 in FY2024 and #22 in FY2025; up 3 since FY2022.
10	Maximus Inc. Through Maximus Federal Services, Inc. Top agencies VA (Department of Veterans Affairs)	$2,200,190	1.5%	Rank history: #23 in FY2021, #21 in FY2022 and not on the FY2024–FY2025 lists; up 11 since FY2022.
11	Provider Resources Inc 2 awardees Top agencies VA (Department of Veterans Affairs)	$2,133,975	1.5%	Rank history: #19 in FY2021, #20 in FY2022, #7 in FY2024 and not on the FY2025 list; up 9 since FY2022.
12	Nevada State Veterans Home Through Nevada System of Higher Education Top agencies Commerce (Department of Commerce)	$2,028,466	1.4%	Rank history: #10 in FY2021, #9 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
13	Sae International Top agencies DOT (Department of Transportation)	$2,003,831	1.4%	Rank history: #7 in FY2021, #13 in FY2022, #12 in FY2024 and #5 in FY2025; unchanged since FY2022.
14	American Board of Family Medicine Inc. Top agencies HHS (Department of Health and Human Services)	$1,702,926	1.2%	Rank history: #14 in FY2021, #14 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
15	National Association for Public Health Statistics and Information Systems, Inc. Top agencies SSA (Social Security Administration) DCSA (Defense Counterintelligence and Security Agency) HHS (Department of Health and Human Services)	$1,645,853	1.2%	Rank history: #9 in FY2021, #15 in FY2022, #8 in FY2024 and #17 in FY2025; unchanged since FY2022.
16	Commission On Accreditation of Rehabilitation Facilities Top agencies VA (Department of Veterans Affairs)	$1,421,359	1.0%	Rank history: #4 in FY2021, #16 in FY2022, #5 in FY2024 and #6 in FY2025; unchanged since FY2022.
17	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) HHS (Department of Health and Human Services)	$1,269,317	0.9%	Rank history: #21 in FY2021, #25 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
18	Cornell University Top agencies Commerce (Department of Commerce)	$1,169,708	0.8%	Rank history: #22 in FY2021, #22 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
19	American College of Surgeons Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,060,796	0.7%	Rank history: #13 in FY2021, #8 in FY2022, #48 in FY2024 and #10 in FY2025; down 11 since FY2022.
20	Capital Factory Properties LLC Top agencies Army (Department of the Army)	$1,023,628	0.7%	Rank history: #26 in FY2021, #28 in FY2022, #15 in FY2024 and #12 in FY2025; up 8 since FY2022.
21	University of Nebraska Through Board of Regents of the University of Nebraska Top agencies Commerce (Department of Commerce)	$986,127	0.7%	Rank history: #24 in FY2021, #27 in FY2022 and not on the FY2024–FY2025 lists; up 6 since FY2022.
22	Purdue University Top agencies Commerce (Department of Commerce)	$966,480	0.7%	Rank history: #34 in FY2021, #31 in FY2022, #19 in FY2024 and #19 in FY2025; up 9 since FY2022.
23	University of North Carolina at Chapel Hill Top agencies Commerce (Department of Commerce) EPA (Environmental Protection Agency)	$956,814	0.7%	Rank history: #30 in FY2021, #30 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
24	National Minority Supplier Development Council Inc. Top agencies Commerce (Department of Commerce)	$860,000	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
25	National Academy of Public Administration Top agencies USAID (US Agency for International Development)	$849,939	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
26	American Hospital Association Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$841,238	0.6%	Rank history: #28 in FY2021, #36 in FY2022, #25 in FY2024 and #16 in FY2025; up 10 since FY2022.
27	Dt-Trak Consulting, Inc. Top agencies HHS (Department of Health and Human Services)	$758,200	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
28	National Academy of Sciences Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior) DOE (Department of Energy)	$750,259	0.5%	Rank history: #29 in FY2021, #34 in FY2022, #27 in FY2024 and not on the FY2025 list; up 6 since FY2022.
29	John Wiley & Sons Inc. Top agencies Navy (Department of the Navy)	$746,927	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
30	Morse Nichols & Associates LLC Top agencies HHS (Department of Health and Human Services)	$726,750	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
31	Digital Promise Global Top agencies ED (Department of Education)	$669,458	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
32	Academy Health Top agencies VA (Department of Veterans Affairs)	$661,747	0.5%	Rank history: #39 in FY2021, #17 in FY2022, #16 in FY2024 and #33 in FY2025; down 15 since FY2022.
33	American Psychological Association Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$624,394	0.4%	Rank history: #27 in FY2021, not on the FY2022 list, #40 in FY2024 and #25 in FY2025; up 238 since FY2022.
34	Deloitte LLP Through Deloitte Consulting LLP Top agencies DOE (Department of Energy)	$590,980	0.4%	Rank history: #36 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
35	Gartner, Inc. Top agencies DOT (Department of Transportation) NASA (National Aeronautics and Space Administration)	$573,452	0.4%	Rank history: #75 in FY2021, #51 in FY2022, #28 in FY2024 and #67 in FY2025; up 16 since FY2022.
36	University of Texas System 3 awardees, including University of Texas At Austin and The University of Texas Health Science Center At San Antonio Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce) Army (Department of the Army)	$550,195	0.4%	Rank history: #65 in FY2021, #48 in FY2022 and not on the FY2024–FY2025 lists; up 12 since FY2022.
37	American College of Medical Toxicology Incorporated Top agencies HHS (Department of Health and Human Services)	$550,000	0.4%	Rank history: #50 in FY2021, #47 in FY2022 and not on the FY2024–FY2025 lists; up 10 since FY2022.
38	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) DISA (Defense Information Systems Agency)	$548,315	0.4%	Rank history: #31 in FY2021, #35 in FY2022, #52 in FY2024 and not on the FY2025 list; down 3 since FY2022.
39	Rtca Inc. Top agencies DOT (Department of Transportation) DHS (Department of Homeland Security)	$543,180	0.4%	Rank history: #25 in FY2021, #19 in FY2022, #26 in FY2024 and #24 in FY2025; down 20 since FY2022.
40	Open Geospatial Consortium Inc. Top agencies DOI (Department of the Interior) Commerce (Department of Commerce) DOT (Department of Transportation)	$541,773	0.4%	Rank history: #20 in FY2021, #24 in FY2022, #33 in FY2024 and #86 in FY2025; down 16 since FY2022.
41	American Association of Blood Banks, Inc. Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$514,924	0.4%	Rank history: #37 in FY2021, #42 in FY2022, #38 in FY2024 and #30 in FY2025; up 1 since FY2022.
42	Accreditation Council for Graduate Medical Education Top agencies USUHS (DOD Uniformed Services University of the Health Sciences) DHA (Defense Health Agency)	$514,029	0.4%	Rank history: #51 in FY2021, #56 in FY2022, #42 in FY2024 and #36 in FY2025; up 14 since FY2022.
43	Association of American Medical Colleges Top agencies HHS (Department of Health and Human Services) USUHS (DOD Uniformed Services University of the Health Sciences) VA (Department of Veterans Affairs)	$458,228	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
44	American National Standards Institute Incorporated Top agencies DHS (Department of Homeland Security) Commerce (Department of Commerce) DOI (Department of the Interior)	$455,184	0.3%	Rank history: #91 in FY2021, #74 in FY2022, #39 in FY2024 and #77 in FY2025; up 30 since FY2022.
45	Collaborative Community On Ophthalmic Imaging Foundation Top agencies HHS (Department of Health and Human Services)	$441,597	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
46	International Association of Chiefs of Police Top agencies DOT (Department of Transportation) DOJ (Department of Justice) DHS (Department of Homeland Security)	$424,587	0.3%	Rank history: #98 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 105 since FY2022.
47	Association of Public Health Laboratories, Inc. (The) Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$423,390	0.3%	Rank history: #15 in FY2021, #10 in FY2022, #36 in FY2024 and not on the FY2025 list; down 37 since FY2022.
48	National Association of School Nurses, Incorporated Top agencies HHS (Department of Health and Human Services)	$401,641	0.3%	Rank history: #44 in FY2021, #50 in FY2022, #49 in FY2024 and not on the FY2025 list; up 2 since FY2022.
49	Military Operations Research Society, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$389,677	0.3%	Rank history: #43 in FY2021, #49 in FY2022, #43 in FY2024 and #29 in FY2025; unchanged since FY2022.
50	National Conference of Bar Examiners	$389,278	0.3%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2024 and #34 in FY2025; new.
51	XL Associates, Inc. Top agencies USAID (US Agency for International Development)	$372,270	0.3%	Rank history: #3 in FY2021, #6 in FY2022, #17 in FY2024 and not on the FY2025 list; down 45 since FY2022.
52	Air Force Sergeants Association Top agencies USAF (Department of the Air Force)	$351,000	0.2%	Rank history: #67 in FY2021, #53 in FY2022, #45 in FY2024 and not on the FY2025 list; up 1 since FY2022.
53	Radiomovil Dipsa S.a. DE C.V. Through America Movil Peru Sac Top agencies DOS (Department of State)	$346,689	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
54	Montgomery Area Chamber of Commerce Top agencies USAF (Department of the Air Force)	$345,600	0.2%	Rank history: not on the FY2021 list, #60 in FY2022, not on the FY2024 list and #87 in FY2025; up 6 since FY2022.
55	The National Registry of Emergency Medical Technicians Inc. Top agencies USAF (Department of the Air Force)	$337,920	0.2%	Rank history: #74 in FY2021, not on the FY2022 list, #56 in FY2024 and #57 in FY2025; up 135 since FY2022.
56	Hydropower Research Institute Top agencies DOI (Department of the Interior)	$320,000	0.2%	Rank history: #69 in FY2021, #46 in FY2022, not on the FY2024 list and #47 in FY2025; down 10 since FY2022.
57	RMG and Associates Top agencies Treasury (Department of the Treasury)	$313,892	0.2%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2024 and #60 in FY2025; new.
58	American Astronomical Society Top agencies NASA (National Aeronautics and Space Administration) NSF (National Science Foundation) Smithsonian (Smithsonian Institution)	$312,262	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #58 in FY2025; up 192 since FY2022.
59	C & H Precision Weapons, LLC Top agencies DOJ (Department of Justice)	$306,531	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
60	American Medical Informatics Association, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DHA (Defense Health Agency)	$293,200	0.2%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2024 and #38 in FY2025; up 114 since FY2022.
61	Juice Consulting LLC Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense)	$275,401	0.2%	Rank history: #63 in FY2021, #29 in FY2022, #21 in FY2024 and #50 in FY2025; down 32 since FY2022.
62	Standards Coordinating Body for Gene Cell & Regenerative Medicines Top agencies Commerce (Department of Commerce)	$267,240	0.2%	Rank history: #45 in FY2021, #54 in FY2022, #98 in FY2024 and not on the FY2025 list; down 8 since FY2022.
63	Society for the Advancement of Chicanos and Native Americans In Science Top agencies Commerce (Department of Commerce) USDA (Department of Agriculture) NSF (National Science Foundation)	$261,675	0.2%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2024 and not on the FY2025 list; up 280 since FY2022.
64	Acog Foundation Top agencies HHS (Department of Health and Human Services)	$253,555	0.2%	Rank history: #80 in FY2021, #63 in FY2022, #54 in FY2024 and not on the FY2025 list; down 1 since FY2022.
65	Vlogic Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$240,681	0.2%	Rank history: #55 in FY2021, #62 in FY2022, #59 in FY2024 and #39 in FY2025; down 3 since FY2022.
66	Ceati International Inc. Top agencies DOI (Department of the Interior) DOE (Department of Energy) DHS (Department of Homeland Security)	$237,181	0.2%	Rank history: #58 in FY2021, #66 in FY2022, #62 in FY2024 and #40 in FY2025; unchanged since FY2022.
67	Ass Mondiale De La Route Top agencies DOT (Department of Transportation)	$230,000	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #91 in FY2025; up 152 since FY2022.
68	Healthcare Information and Management Systems Society Top agencies DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$216,500	0.2%	Rank history: #48 in FY2021, #67 in FY2022, #93 in FY2024 and #61 in FY2025; down 1 since FY2022.
69	National Society of Black Engineers Top agencies DOS (Department of State) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$215,000	0.2%	Rank history: #83 in FY2021, #65 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
70	PQA Inc. Top agencies HHS (Department of Health and Human Services)	$214,200	0.2%	Rank history: #64 in FY2021, #68 in FY2022, #64 in FY2024 and not on the FY2025 list; down 2 since FY2022.
71	Oasis Open Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice) Commerce (Department of Commerce)	$209,100	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 39 since FY2022.
72	American College of Emergency Physicians Top agencies HHS (Department of Health and Human Services)	$200,000	0.1%	Rank history: #57 in FY2021, #71 in FY2022, #60 in FY2024 and #46 in FY2025; down 1 since FY2022.
73	State of California Controllers Office Through University of California, Davis Top agencies EPA (Environmental Protection Agency)	$200,000	0.1%	Rank history: not on the FY2021 list, #72 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
74	American Society of Health-System Pharmacists Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$193,601	0.1%	Rank history: #79 in FY2021, #82 in FY2022, #73 in FY2024 and #51 in FY2025; up 8 since FY2022.
75	The American Society of Human Genetics, Incorporated Top agencies HHS (Department of Health and Human Services)	$182,760	0.1%	Rank history: not on the FY2021 list, #89 in FY2022, #22 in FY2024 and #13 in FY2025; up 14 since FY2022.
76	Singleton, Matthew Top agencies DFC (International Development Finance Corporation)	$180,038	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 292 since FY2022.
77	National Contract Management Association Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) Commerce (Department of Commerce)	$179,286	0.1%	Rank history: #73 in FY2021, #58 in FY2022, #51 in FY2024 and not on the FY2025 list; down 19 since FY2022.
78	Mgma-Acmpe Top agencies VA (Department of Veterans Affairs)	$176,130	0.1%	Rank history: #89 in FY2021, #80 in FY2022, #70 in FY2024 and #43 in FY2025; up 2 since FY2022.
79	Global Carbon Capture and Storage Institute Ltd Top agencies DOE (Department of Energy)	$174,275	0.1%	Rank history: not on the FY2021 list, #75 in FY2022, #75 in FY2024 and #56 in FY2025; down 4 since FY2022.
80	Hiteshhurkchand LLC Top agencies USAID (US Agency for International Development)	$162,133	0.1%	Rank history: not on the FY2021 list, #70 in FY2022 and not on the FY2024–FY2025 lists; down 10 since FY2022.
81	American Bureau of Shipping Top agencies Army (Department of the Army) DOT (Department of Transportation)	$156,672	0.1%	Rank history: #52 in FY2021, #38 in FY2022 and not on the FY2024–FY2025 lists; down 43 since FY2022.
82	American Academy of Family Physicians Top agencies Navy (Department of the Navy)	$154,073	0.1%	Rank history: #85 in FY2021, not on the FY2022 list, #80 in FY2024 and not on the FY2025 list; returned.
83	University Corporation for Advanced Internet Development Top agencies Commerce (Department of Commerce) DOI (Department of the Interior) NSF (National Science Foundation)	$153,757	0.1%	Rank history: #66 in FY2021, #98 in FY2022, #65 in FY2024 and #54 in FY2025; up 15 since FY2022.
84	The District of Columbia Bar	$153,500	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 181 since FY2022.
85	American Nurses' Association Through American Nurses Credentialing Center, Inc. A / K / A American Nurses Credentialing Center Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$153,138	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 181 since FY2022.
86	National Council for Prescription Drug Programs Inc. Top agencies HHS (Department of Health and Human Services) DOL (Department of Labor)	$153,101	0.1%	Rank history: #60 in FY2021, #69 in FY2022, #83 in FY2024 and #59 in FY2025; down 17 since FY2022.
87	International Electrical Testing Association Top agencies Army (Department of the Army)	$146,790	0.1%	Rank history: not on the FY2021 list, #95 in FY2022, #74 in FY2024 and #62 in FY2025; up 8 since FY2022.
88	Funke PHD Gail S Top agencies USAID (US Agency for International Development)	$145,624	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
89	American Society for Radiation Oncology Top agencies VA (Department of Veterans Affairs)	$144,500	0.1%	Rank history: #100 in FY2021, not on the FY2022 list, #95 in FY2024 and #55 in FY2025; up 20 since FY2022.
90	Association of Small Business Development Centers Top agencies SBA (Small Business Administration)	$142,000	0.1%	Rank history: not on the FY2021 list, #88 in FY2022, #88 in FY2024 and not on the FY2025 list; down 2 since FY2022.
91	National Cancer Registrars Association Top agencies HHS (Department of Health and Human Services)	$141,200	0.1%	Rank history: not on the FY2021 list, #87 in FY2022, #100 in FY2024 and #68 in FY2025; down 4 since FY2022.
92	American Association for Laboratory Accreditation, Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) DHA (Defense Health Agency)	$136,629	0.1%	Rank history: #95 in FY2021, #91 in FY2022, #69 in FY2024 and #42 in FY2025; down 1 since FY2022.
93	Association of Academic Health Science Libraries Top agencies HHS (Department of Health and Human Services)	$136,500	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Partnership for Public Service Inc Top agencies DHRA (Defense Human Resources Activity) Treasury (Department of the Treasury) GSA (General Services Administration)	$133,997	0.1%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2024 and not on the FY2025 list; up 139 since FY2022.
95	The Johns Hopkins University Top agencies HHS (Department of Health and Human Services)	$132,700	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 31 since FY2022.
96	Alliance for Telecommunications Industry Solutions Inc. Top agencies Commerce (Department of Commerce) DOJ (Department of Justice) OSD (Office of the Secretary of Defense)	$132,500	0.1%	Rank history: #82 in FY2021, #97 in FY2022, #90 in FY2024 and #53 in FY2025; up 1 since FY2022.
97	American Indian Science and Engineering Society Top agencies NSF (National Science Foundation) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$130,000	0.1%	Rank history: not on the FY2021 list, #99 in FY2022, #76 in FY2024 and not on the FY2025 list; up 2 since FY2022.
98	University of Virginia Darden School Foundation Top agencies USAID (US Agency for International Development)	$128,220	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
99	S.sheinin & Company Inc. Top agencies SEC (Securities and Exchange Commission)	$126,525	0.1%	Rank history: not on the FY2021 list, #85 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
100	Iceye US, Inc. Top agencies HHS (Department of Health and Human Services)	$125,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.

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100 of 450 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 8139

Code	Net obligations	Largest contractor
81392 Professional Organizations	$115,480,473	General Dynamics Corporation
81391 Business Associations	$4,183,647	American Hospital Association

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 $142 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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 8139 contractors in FY2023?

1. General Dynamics Corporation ($22.8M), 2. Joint Commission On Accreditation of Healthcare Organizations ($17.2M), 3. West Virginia Medical Institute Inc. ($8.92M), 4. Michigan Peer Review Organization ($3.63M), 5. Naval Academy Athletic Association ($3.52M), 6. North American Association of Central Cancer Registries Inc. ($3.35M), 7. Lumetra Healthcare Solutions ($2.64M), 8. Institute of Transportation Engineers, Inc. ($2.63M), 9. American Association for the Advancement of Science ($2.34M), 10. Maximus Inc. ($2.2M).

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