Navy Leadership Appointments Announced by Acting Secretary
Acting Navy Secretary Hung Cao has appointed William Mahan to perform the duties of Navy under secretary.
Updated on Sept. 30, 2026 in People

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Acting Navy Secretary Hung Cao has appointed William Mahan to serve as the Navy under secretary while William Toti awaits Senate confirmation. Mahan will take on the role to maintain organizational momentum during the transition.
Why it matters
The appointment is intended to keep office priorities on track and maintain momentum in the ongoing effort to restore American shipbuilding capabilities. This move ensures leadership stability while the Senate considers the nomination of Toti.
William Mahan has managed over $100 billion in annual research, development, acquisition, and sustainment funding since May 2026. This portfolio remains central to the Navy's core operational objectives.
The players
Hung Cao
He has led the Navy department in an acting capacity since April 2026.
William Mahan
He currently performs the duties of assistant secretary of the Navy for research, development and acquisition.
William Toti
He is the presidential nominee for the permanent position of under secretary of the Navy.
Donald Trump
He serves as the current President of the United States.
Seiko Okano
She is a Vice Admiral who will assume the duties of assistant secretary of the Navy for research, development and acquisition.
The details
Acting Navy Secretary Hung Cao appointed William Mahan to the position to ensure continuity in department priorities. Simultaneously, Vice Adm. Seiko Okano will step into the role of assistant secretary of the Navy for research, development, and acquisition.
Timeline
April 2026: Hung Cao began leading the department in an acting capacity.
May 2026: William Toti was selected to perform under secretary duties.
Mid-September 2026: President Donald Trump nominated William Toti for under secretary.
September 29, 2026: Hung Cao published a statement regarding the appointment.
Market Landscape
This leadership adjustment aligns with the ongoing American shipbuilding restoration initiative to ensure administrative stability. It positions the department to continue its focus on industrial production goals despite transitions in the upper ranks.
These administrative changes primarily affect internal department processes rather than immediate public retail services. Taxpayers and defense contractors may see shifts in project oversight as the department manages its substantial acquisition budget.
The takeaway
The appointment of William Mahan highlights the importance of maintaining continuity in high-stakes government procurement roles. Ensuring experienced personnel manage large-scale funding remains a priority for the current administration.
Further reading
For more on personnel changes within the department, see People.
Source note: This article includes information reported by Executive Gov.
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