Navy Appointed New Acting Under Secretary
The move ensures continuity in shipbuilding and procurement efforts while a formal nomination awaits confirmation.
Updated on Sept. 30, 2026 in People

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Acting Navy Secretary Hung Cao has appointed William Mahan to perform the duties of Navy under secretary. This transition keeps federal acquisition and research priorities on track while nominee William Toti awaits Senate confirmation.
Why it matters
The appointment aims to maintain momentum in critical naval shipbuilding initiatives. Maintaining leadership stability in these roles is essential for managing large-scale federal contract pipelines and defense acquisition strategies.
William Mahan has managed over $100 billion in annual research, development, acquisition, and sustainment funding since May 2026. This administrative shift ensures continued oversight of these defense outlays.
The players
Hung Cao
The current acting Navy secretary who has led the department since April 2026.
William Mahan
An official currently overseeing over $100 billion in annual naval research and acquisition funding.
William Toti
The nominee for under secretary of the Navy currently awaiting Senate confirmation.
Seiko Okano
A Vice Admiral designated to assume duties as assistant secretary for research and development.
Donald Trump
The current President of the United States who nominated William Toti for the under secretary role.
The details
Acting Secretary Hung Cao appointed Mahan to preserve operational momentum within the Department of the Navy. Mahan currently handles research and development portfolios, a role that will be transitioned to Vice Adm. Seiko Okano. This reorganization ensures that the department continues its focus on shipbuilding and modernization while the formal nomination process for the under secretary position moves through the Senate.
Timeline
April 2026: Hung Cao began leading the department in an acting capacity.
May 2026: William Toti was selected to perform the duties of under secretary.
Mid-September 2026: President Donald Trump nominated William Toti for the under secretary post.
September 29, 2026: Hung Cao released an official statement confirming the new appointment.
Market Landscape
This administrative adjustment follows the established pattern of using acting officials to maintain institutional momentum during the Senate confirmation process for federal executive nominees. The strategy ensures that long-term shipbuilding and defense programs face no disruption while key personnel await legislative approval.
Operators in the defense contracting sector should monitor these leadership changes for shifts in specific procurement priorities or administrative requirements. Keep track of the pending Senate confirmation hearing, as it will determine the permanent oversight of these $100 billion programs.
The takeaway
Continuity in departmental leadership is a vital indicator for businesses that depend on long-term government research and acquisition spending. Monitor the Senate calendar for the upcoming confirmation hearing of William Toti to gauge potential changes in procurement policy.
Further reading
For more on changes to top-level organizational leadership, see our coverage of People.
Source note: This article includes information reported by Executive Gov.
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