Top 32 Contractors in NAICS 928: National Security and International Affairs, Jul 2025–Jun 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	American Institute In Taiwan Top agencies DOS (Department of State)	$43,724,791	56.5%	Rank history: #2 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since Jul 2024–Jun 2025.
2	International Organization for Migration Top agencies DHS (Department of Homeland Security)	$4,046,738	5.2%	Rank history: not on the FY2021–FY2023 lists, #2 in FY2024 and #2 in FY2025; unchanged since Jul 2024–Jun 2025.
3	Brown International Corporation Top agencies USAF (Department of the Air Force)	$1,424,110	1.8%	Rank history: #9 in FY2021, not on the FY2022–FY2023 lists, #4 in FY2024 and #3 in FY2025; unchanged since Jul 2024–Jun 2025.
4	Raven Advisory LLC Top agencies DHS (Department of Homeland Security)	$582,792	0.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
5	MAK Technologies Inc. Through Trustwave Government Solutions, LLC Top agencies National Gallery of Art	$340,481	0.4%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and not on the FY2025 list; unchanged since Jul 2024–Jun 2025.
6	Stellar Science Ltd. Co. Top agencies USAF (Department of the Air Force)	$325,000	0.4%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2023, #3 in FY2024 and #4 in FY2025; down 2 since Jul 2024–Jun 2025.
7	Khalid B Simaan Top agencies Treasury (Department of the Treasury)	$266,724	0.3%	Rank history: #31 in FY2021, #30 in FY2022, #16 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
8	Ishikawa Linda J Top agencies Treasury (Department of the Treasury)	$179,273	0.2%	Rank history: #59 in FY2021, #50 in FY2022, #26 in FY2023, #19 in FY2024 and #11 in FY2025; up 3 since Jul 2024–Jun 2025.
9	UEI L7HXSKF1R545 Top agencies Treasury (Department of the Treasury)	$174,631	0.2%	Rank history: #86 in FY2021, not on the FY2022 list, #33 in FY2023, #18 in FY2024 and #9 in FY2025; up 8 since Jul 2024–Jun 2025.
10	International Law Institute Top agencies DOS (Department of State)	$162,796	0.2%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023, #20 in FY2024 and #20 in FY2025; up 8 since Jul 2024–Jun 2025.
11	Egbert Warner Ospina Top agencies Treasury (Department of the Treasury)	$162,740	0.2%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; up 2 since Jul 2024–Jun 2025.
12	Teresa A Cochran Top agencies Treasury (Department of the Treasury)	$146,067	0.2%	Rank history: #80 in FY2021, #74 in FY2022, #46 in FY2023, #34 in FY2024 and #18 in FY2025; up 9 since Jul 2024–Jun 2025.
13	Kofmehl Associates LLC Top agencies Treasury (Department of the Treasury)	$141,029	0.2%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; new, not ranked in Jul 2024–Jun 2025.
14	Thomas Benjamin Gilmer Top agencies Treasury (Department of the Treasury)	$137,758	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
15	L3Harris Technologies, Inc. Top agencies DOE (Department of Energy)	$135,000	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
16	Eric Richard Tremont Top agencies Treasury (Department of the Treasury)	$93,552	0.1%	Rank history: not on the FY2021 list, #89 in FY2022, #43 in FY2023, #23 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
17	UEI HVM5WCUT74J3 Top agencies Treasury (Department of the Treasury)	$89,151	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
18	UEI CW4GS4AX9HV6 Top agencies Treasury (Department of the Treasury)	$82,954	0.1%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; up 23 since Jul 2024–Jun 2025.
19	UEI VAUET2VGTA29 Top agencies Treasury (Department of the Treasury)	$79,150	0.1%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; new, not ranked in Jul 2024–Jun 2025.
20	UEI YXJ1FNWHJJQ3 Top agencies Treasury (Department of the Treasury)	$74,626	0.1%	Rank history: not on the FY2021–FY2024 lists and #22 in FY2025; new, not ranked in Jul 2024–Jun 2025.
21	UEI KGHNSLW862W7 Top agencies Treasury (Department of the Treasury)	$67,342	0.1%	Rank history: #27 in FY2021, #44 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
22	Mainwaring, Donald Top agencies Treasury (Department of the Treasury)	$59,510	0.1%	Rank history: not on the FY2021–FY2023 lists, #52 in FY2024 and #23 in FY2025; new, not ranked in Jul 2024–Jun 2025.
23	UEI HRVBCVVV4PP8 Top agencies Treasury (Department of the Treasury)	$54,235	0.1%	Rank history: not on the FY2021–FY2023 lists, #50 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
24	UEI WXXYV4ZTNNW5 Top agencies Treasury (Department of the Treasury)	$40,770	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
25	Gene S Evenskaas Top agencies Treasury (Department of the Treasury)	$20,492	<0.1%	Rank history: not on the FY2021–FY2023 lists, #74 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
26	UEI E7QXACXYVP18 Top agencies Treasury (Department of the Treasury)	$12,262	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
27	William S. Hein & Co., Inc.	$12,096	<0.1%	Rank history: not on the FY2021–FY2024 lists and #33 in FY2025; up 12 since Jul 2024–Jun 2025.
28	Resolve Marine Group Inc. Top agencies DHS (Department of Homeland Security)	$7,763	<0.1%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; new, not ranked in Jul 2024–Jun 2025.
29	Lamar, Nathan Scott Top agencies Commerce (Department of Commerce)	$6,326	<0.1%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; new, not ranked in Jul 2024–Jun 2025.
30	Florida Department of Commerce Top agencies DHS (Department of Homeland Security)	$6,030	<0.1%	Rank history: not on the FY2021–FY2023 lists, #75 in FY2024 and #39 in FY2025; up 13 since Jul 2024–Jun 2025.
31	Government of Canada Top agencies DOI (Department of the Interior)	$5,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; up 17 since Jul 2024–Jun 2025.
32	Lockmasters Inc. Top agencies USAF (Department of the Air Force)	$653	<0.1%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; new, not ranked in Jul 2024–Jun 2025.

Rankings for the codes under NAICS 928

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 $77.4 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.
• Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
• Rank changes compare with Jul 2024–Jun 2025. "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.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

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