Top 100 Contractors in NAICS 9281: National Security and International Affairs, FY2023

Name: Top 100 Contractors in NAICS 9281: National Security and International Affairs, FY2023
Creator: GovTribe

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

The top 10 won 75% of FY2023 NAICS 9281 contract dollars

Contract obligations: $99,896,445 Net of deobligations, by contracts coded NAICS 9281 or a code under it
Contractors: 140 Parent companies with an obligation
Largest contractor: American Institute In Taiwan $62.6 million, 52.5% 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	American Institute In Taiwan Top agencies DOS (Department of State) DHS (Department of Homeland Security)	$62,634,621	52.5%	Rank history: #2 in FY2021, #1 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	John Snow, Incorporated Top agencies USAID (US Agency for International Development)	$11,532,536	9.7%	Rank history: #3 in FY2021, #2 in FY2022, #6 in FY2024 and not on the FY2025 list; unchanged since FY2022.
3	International Organization for Migration Top agencies DHS (Department of Homeland Security)	$7,546,182	6.3%	Rank history: #5 in FY2021, #4 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
4	Stellar Science Ltd. Co. Top agencies USAF (Department of the Air Force)	$3,145,000	2.6%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2024 and #4 in FY2025; new.
5	Aarcorp Through Brown International Corporation Top agencies USAF (Department of the Air Force)	$1,690,522	1.4%	Rank history: #8 in FY2021, #6 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
6	Center for A New American Security, Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$819,967	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
7	Valar Ltd Top agencies DOJ (Department of Justice)	$683,924	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
8	Trustwave Government Solutions LLC Top agencies National Gallery of Art	$339,120	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
9	Daniel Zambrano Top agencies Treasury (Department of the Treasury)	$338,883	0.3%	Rank history: #42 in FY2021, #39 in FY2022 and not on the FY2024–FY2025 lists; up 30 since FY2022.
10	Patricia Silvia Bacchi Top agencies Treasury (Department of the Treasury)	$261,965	0.2%	Rank history: #22 in FY2021, #27 in FY2022 and not on the FY2024–FY2025 lists; up 17 since FY2022.
11	UEI YVJJRWLLE4H3 Top agencies Treasury (Department of the Treasury)	$250,126	0.2%	Rank history: #21 in FY2021, #19 in FY2022, #9 in FY2024 and not on the FY2025 list; up 8 since FY2022.
12	UEI F7CWBPRVVZS8 Top agencies Treasury (Department of the Treasury)	$235,345	0.2%	Rank history: #16 in FY2021, #38 in FY2022, #10 in FY2024 and #5 in FY2025; up 26 since FY2022.
13	John J Murphy Top agencies Treasury (Department of the Treasury)	$234,584	0.2%	Rank history: #74 in FY2021, #13 in FY2022, #11 in FY2024 and not on the FY2025 list; unchanged since FY2022.
14	Venkatesan, Shanthi Top agencies Treasury (Department of the Treasury)	$233,950	0.2%	Rank history: #17 in FY2021, #22 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
15	Sheryl Kelly Top agencies Treasury (Department of the Treasury)	$217,522	0.2%	Rank history: not on the FY2021 list, #77 in FY2022, #15 in FY2024 and not on the FY2025 list; up 62 since FY2022.
16	Khalid B Simaan Top agencies Treasury (Department of the Treasury)	$212,050	0.2%	Rank history: #31 in FY2021, #30 in FY2022 and not on the FY2024–FY2025 lists; up 14 since FY2022.
17	Crawford Marshall Andrew Top agencies Treasury (Department of the Treasury)	$210,509	0.2%	Rank history: #40 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; up 16 since FY2022.
18	Nichola F Fluehr-Lobban Top agencies Treasury (Department of the Treasury)	$208,628	0.2%	Rank history: #34 in FY2021, #32 in FY2022, #12 in FY2024 and #8 in FY2025; up 14 since FY2022.
19	Lanier, Thomas Top agencies Treasury (Department of the Treasury)	$197,401	0.2%	Rank history: #15 in FY2021, #40 in FY2022, #8 in FY2024 and #6 in FY2025; up 21 since FY2022.
20	Beckett Sheila Top agencies Treasury (Department of the Treasury)	$197,121	0.2%	Rank history: #37 in FY2021, #21 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
21	State of Louisiana Through Department of Military Affairs Louisiana Top agencies DOJ (Department of Justice)	$194,880	0.2%	Rank history: #85 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; up 22 since FY2022.
22	UEI L16QHX58WTX1 Top agencies Treasury (Department of the Treasury)	$190,197	0.2%	Rank history: #64 in FY2021, #14 in FY2022 and not on the FY2024–FY2025 lists; down 8 since FY2022.
23	Guillermo Tello Top agencies Treasury (Department of the Treasury)	$184,055	0.2%	Rank history: not on the FY2021 list, #16 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
24	UEI SH31VY2H8RP3 Top agencies Treasury (Department of the Treasury)	$177,645	0.1%	Rank history: not on the FY2021 list, #29 in FY2022, #81 in FY2024 and not on the FY2025 list; up 5 since FY2022.
25	Lisa Poggiali Top agencies USAID (US Agency for International Development)	$162,559	0.1%	Rank history: #53 in FY2021, #45 in FY2022, #64 in FY2024 and not on the FY2025 list; up 20 since FY2022.
26	Ishikawa Linda J Top agencies Treasury (Department of the Treasury)	$158,408	0.1%	Rank history: #59 in FY2021, #50 in FY2022, #19 in FY2024 and #11 in FY2025; up 24 since FY2022.
27	Hoang Minh Investment Technology Joint Stock Company Top agencies DOS (Department of State)	$149,178	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
28	Randolph Dana Top agencies Treasury (Department of the Treasury)	$142,558	0.1%	Rank history: #65 in FY2021, #48 in FY2022, #22 in FY2024 and #13 in FY2025; up 20 since FY2022.
29	Bryan K Barnett Top agencies Treasury (Department of the Treasury)	$141,741	0.1%	Rank history: #76 in FY2021, not on the FY2022 list, #24 in FY2024 and #37 in FY2025; up 94 since FY2022.
30	UEI CJ5NR8PJJ6C8 Top agencies Treasury (Department of the Treasury)	$138,818	0.1%	Rank history: not on the FY2021 list, #18 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
31	Michael Joseph Fox JR Top agencies Treasury (Department of the Treasury)	$136,092	0.1%	Rank history: #70 in FY2021, #56 in FY2022, #25 in FY2024 and #14 in FY2025; up 25 since FY2022.
32	Thomas B Sewell Top agencies Treasury (Department of the Treasury)	$131,959	0.1%	Rank history: #67 in FY2021, #51 in FY2022 and not on the FY2024–FY2025 lists; up 19 since FY2022.
33	UEI L7HXSKF1R545 Top agencies Treasury (Department of the Treasury)	$126,059	0.1%	Rank history: #86 in FY2021, not on the FY2022 list, #18 in FY2024 and #9 in FY2025; up 77 since FY2022.
34	Donna Kaylene Blackburn Top agencies Treasury (Department of the Treasury)	$125,059	0.1%	Rank history: #39 in FY2021, #11 in FY2022, #32 in FY2024 and not on the FY2025 list; down 23 since FY2022.
35	Cara Y Bidwell Top agencies Treasury (Department of the Treasury)	$116,760	0.1%	Rank history: #75 in FY2021, #59 in FY2022, #29 in FY2024 and not on the FY2025 list; up 24 since FY2022.
36	Lori B Fleming Top agencies Treasury (Department of the Treasury)	$113,231	0.1%	Rank history: not on the FY2021 list, #92 in FY2022, #38 in FY2024 and not on the FY2025 list; up 56 since FY2022.
37	UEI VGH4YSBFY2V5 Top agencies Treasury (Department of the Treasury)	$112,216	0.1%	Rank history: #71 in FY2021, #68 in FY2022, #54 in FY2024 and not on the FY2025 list; up 31 since FY2022.
38	Zebara LLC Top agencies USAF (Department of the Air Force)	$110,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2024 and #15 in FY2025; new.
39	UEI HVL2C6RN8CD6 Top agencies Treasury (Department of the Treasury)	$107,937	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 62 since FY2022.
40	Department of Military Affairs Louisiana Top agencies DOJ (Department of Justice)	$104,940	0.1%	Rank history: #45 in FY2021, #91 in FY2022 and not on the FY2024–FY2025 lists; up 51 since FY2022.
41	Danielle Harris Top agencies Treasury (Department of the Treasury)	$102,674	0.1%	Rank history: not on the FY2021 list, #70 in FY2022 and not on the FY2024–FY2025 lists; up 29 since FY2022.
42	UEI V9T4G7JWCUH5 Top agencies Treasury (Department of the Treasury)	$100,341	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
43	Eric Richard Tremont Top agencies Treasury (Department of the Treasury)	$99,082	0.1%	Rank history: not on the FY2021 list, #89 in FY2022, #23 in FY2024 and not on the FY2025 list; up 46 since FY2022.
44	UEI PNKWNXSXJR33 Top agencies Treasury (Department of the Treasury)	$98,202	0.1%	Rank history: #68 in FY2021, #53 in FY2022, #27 in FY2024 and not on the FY2025 list; up 9 since FY2022.
45	Tesche Jean E Top agencies Treasury (Department of the Treasury)	$95,538	0.1%	Rank history: #78 in FY2021, #78 in FY2022, #48 in FY2024 and not on the FY2025 list; up 33 since FY2022.
46	Teresa A Cochran Top agencies Treasury (Department of the Treasury)	$94,093	0.1%	Rank history: #80 in FY2021, #74 in FY2022, #34 in FY2024 and #18 in FY2025; up 28 since FY2022.
47	UEI RT8HBTNLES48 Top agencies Treasury (Department of the Treasury)	$84,048	0.1%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2024 and not on the FY2025 list; new.
48	UEI ND22R96KAAU3 Top agencies Treasury (Department of the Treasury)	$78,083	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
49	UEI KGHNSLW862W7 Top agencies Treasury (Department of the Treasury)	$77,782	0.1%	Rank history: #27 in FY2021, #44 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
50	United Nations Through Union Internationale DES Telecommunications (Uit) Top agencies Commerce (Department of Commerce)	$75,717	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 52 since FY2022.
51	UEI MMXFAARFJH63 Top agencies Treasury (Department of the Treasury)	$75,450	0.1%	Rank history: #93 in FY2021, #79 in FY2022 and not on the FY2024–FY2025 lists; up 28 since FY2022.
52	UEI RP3KV4TSD124 Top agencies Treasury (Department of the Treasury)	$70,677	0.1%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2024 and not on the FY2025 list; new.
53	Kasotc Special Operations Training Center Top agencies USSOCOM (United States Special Operations Command)	$70,486	0.1%	Rank history: #10 in FY2021, #10 in FY2022, #5 in FY2024 and not on the FY2025 list; down 43 since FY2022.
54	Olson, Craig T Top agencies Treasury (Department of the Treasury)	$70,085	0.1%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2024 and #26 in FY2025; up 50 since FY2022.
55	Hobgood Thomas Top agencies USDA (Department of Agriculture)	$67,187	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
56	UEI MHVKML9YM1F5 Top agencies Treasury (Department of the Treasury)	$65,855	0.1%	Rank history: not on the FY2021–FY2022 lists, #68 in FY2024 and not on the FY2025 list; new.
57	Lamb Russell Lewis Top agencies Treasury (Department of the Treasury)	$62,407	0.1%	Rank history: #62 in FY2021, #36 in FY2022 and not on the FY2024–FY2025 lists; down 21 since FY2022.
58	Taylor, Keith Vincent Top agencies Treasury (Department of the Treasury)	$61,463	0.1%	Rank history: not on the FY2021 list, #75 in FY2022, #31 in FY2024 and not on the FY2025 list; up 17 since FY2022.
59	UEI DQ1MWQ8P3DD5 Top agencies Treasury (Department of the Treasury)	$61,396	0.1%	Rank history: #43 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
60	Charlotte Bailey Harris Top agencies Treasury (Department of the Treasury)	$61,277	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 65 since FY2022.
61	Vasquez, Javier Gustavo Top agencies Treasury (Department of the Treasury)	$57,213	<0.1%	Rank history: #94 in FY2021, #84 in FY2022, #36 in FY2024 and #28 in FY2025; up 23 since FY2022.
62	Gendron Amanda Chapman Top agencies Treasury (Department of the Treasury)	$56,762	<0.1%	Rank history: #100 in FY2021, #83 in FY2022, #42 in FY2024 and #44 in FY2025; up 21 since FY2022.
63	UEI H65VZGLNQZF5 Top agencies Treasury (Department of the Treasury)	$56,748	<0.1%	Rank history: #79 in FY2021, #87 in FY2022 and not on the FY2024–FY2025 lists; up 24 since FY2022.
64	Government of the United States Top agencies Treasury (Department of the Treasury)	$50,494	<0.1%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2024 and not on the FY2025 list; up 52 since FY2022.
65	Kelli Renee Thompson Top agencies Treasury (Department of the Treasury)	$50,048	<0.1%	Rank history: not on the FY2021 list, #57 in FY2022, #14 in FY2024 and not on the FY2025 list; down 8 since FY2022.
66	Athanasaw, Danny L Top agencies Treasury (Department of the Treasury)	$47,633	<0.1%	Rank history: not on the FY2021 list, #73 in FY2022, #49 in FY2024 and not on the FY2025 list; up 7 since FY2022.
67	UEI KV33NPNWZYC9 Top agencies Treasury (Department of the Treasury)	$46,235	<0.1%	Rank history: #63 in FY2021, #86 in FY2022, #51 in FY2024 and #16 in FY2025; up 19 since FY2022.
68	Margaret M Gavaghan Top agencies Treasury (Department of the Treasury)	$45,068	<0.1%	Rank history: #91 in FY2021, #71 in FY2022, #28 in FY2024 and #30 in FY2025; up 3 since FY2022.
69	UEI K4XLT3MBLDR6 Top agencies Treasury (Department of the Treasury)	$44,418	<0.1%	Rank history: #36 in FY2021, #20 in FY2022 and not on the FY2024–FY2025 lists; down 49 since FY2022.
70	Cermak David Luce Top agencies Treasury (Department of the Treasury)	$42,220	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
71	UEI CCDYZCBLVR81 Top agencies Treasury (Department of the Treasury)	$42,089	<0.1%	Rank history: #46 in FY2021, #63 in FY2022, #53 in FY2024 and not on the FY2025 list; down 8 since FY2022.
72	UEI RXVJE3SZQ671 Top agencies Treasury (Department of the Treasury)	$40,451	<0.1%	Rank history: #33 in FY2021, #41 in FY2022, #76 in FY2024 and not on the FY2025 list; down 31 since FY2022.
73	Edge NPD SP. Z O.o. Top agencies DOS (Department of State)	$38,789	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
74	Zimmerman Cathy Jean Top agencies Treasury (Department of the Treasury)	$38,126	<0.1%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2024 and not on the FY2025 list; new.
75	Dragonfly Eye Limited Top agencies NRC (Nuclear Regulatory Commission)	$38,000	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 28 since FY2022.
76	James Edward Thorsen Top agencies Treasury (Department of the Treasury)	$37,180	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 57 since FY2022.
77	International Law Institute Top agencies DOS (Department of State)	$36,496	<0.1%	Rank history: not on the FY2021–FY2022 lists, #20 in FY2024 and #20 in FY2025; new.
78	UEI Z1SPYJAJ81W5 Top agencies Treasury (Department of the Treasury)	$35,468	<0.1%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2024 and not on the FY2025 list; new.
79	Bowen, Steven R Top agencies Treasury (Department of the Treasury)	$34,915	<0.1%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2024 and not on the FY2025 list; up 34 since FY2022.
80	UEI GJTVE8RMLV65 Top agencies Treasury (Department of the Treasury)	$34,102	<0.1%	Rank history: #87 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 26 since FY2022.
81	Vaughn, Randall D Top agencies Treasury (Department of the Treasury)	$33,373	<0.1%	Rank history: #98 in FY2021, not on the FY2022 list, #45 in FY2024 and not on the FY2025 list; up 24 since FY2022.
82	UEI NP7MSHL73WS8 Top agencies Treasury (Department of the Treasury)	$32,284	<0.1%	Rank history: not on the FY2021 list, #85 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
83	UEI F57TAV1QZJE1 Top agencies Treasury (Department of the Treasury)	$29,588	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
84	UEI CBD7Z9MH9BT7 Top agencies Treasury (Department of the Treasury)	$26,641	<0.1%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2024 and not on the FY2025 list; new.
85	UEI LQURCBUJ6TN3 Top agencies Treasury (Department of the Treasury)	$23,251	<0.1%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2024 and not on the FY2025 list; new.
86	UEI R5C6TT7HT4V8 Top agencies Treasury (Department of the Treasury)	$22,206	<0.1%	Rank history: not on the FY2021 list, #58 in FY2022 and not on the FY2024–FY2025 lists; down 28 since FY2022.
87	James Westcott Top agencies Treasury (Department of the Treasury)	$21,957	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 27 since FY2022.
88	UEI K41YWSMLN5T3 Top agencies Treasury (Department of the Treasury)	$21,894	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
89	Heico Aerospace Corporat Through Research Electronics International, L.L.C. Top agencies NRC (Nuclear Regulatory Commission)	$20,000	<0.1%	Rank history: not on the FY2021 list, #97 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
90	UEI NW3QCZ16USC6 Top agencies Treasury (Department of the Treasury)	$19,316	<0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #36 in FY2025; new.
91	Hyunsung Afull Representaciones H.a.r. Cia. LTDA Top agencies DOS (Department of State)	$16,989	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
92	UEI Z53HD7PUA1J4 Top agencies Treasury (Department of the Treasury)	$15,163	<0.1%	Rank history: #77 in FY2021, #76 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
93	American Foreign Policy Council Top agencies USAGM (US Agency for Global Media)	$14,400	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	UEI QSPCKF6T3CW6 Top agencies Treasury (Department of the Treasury)	$14,175	<0.1%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2024 and not on the FY2025 list; new.
95	UEI FUJEH3K3LM63 Top agencies Treasury (Department of the Treasury)	$12,533	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 33 since FY2022.
96	Hawkins, David Top agencies Treasury (Department of the Treasury)	$12,236	<0.1%	Rank history: #14 in FY2021, #25 in FY2022, #55 in FY2024 and not on the FY2025 list; down 71 since FY2022.
97	Leidos Holdings, Inc. Through Leidos, Inc. Top agencies USAF (Department of the Air Force)	$12,066	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
98	Christine M Wondra Top agencies Treasury (Department of the Treasury)	$11,916	<0.1%	Rank history: #13 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
99	County of San Bernardino Through San Bernardino County Top agencies Army (Department of the Army)	$11,219	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 30 since FY2022.
100	Mullins Stephen Top agencies Treasury (Department of the Treasury)	$9,466	<0.1%	Rank history: not on the FY2021 list, #80 in FY2022, #66 in FY2024 and not on the FY2025 list; down 20 since FY2022.

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100 of 140 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 9281

Code	Net obligations	Largest contractor
92812 International Affairs	$96,666,623	American Institute In Taiwan

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 $119 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 9281 contractors in FY2023?

1. American Institute In Taiwan ($62.6M), 2. John Snow, Incorporated ($11.5M), 3. International Organization for Migration ($7.55M), 4. Stellar Science Ltd. Co. ($3.15M), 5. Aarcorp ($1.69M), 6. Center for A New American Security, Inc. ($820K), 7. Valar Ltd ($684K), 8. Trustwave Government Solutions LLC ($339K), 9. Daniel Zambrano ($339K), 10. Patricia Silvia Bacchi ($262K).

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