Overview

• Chollet previously served in senior roles at the White House, Pentagon, and State Department.
• His nomination for undersecretary of defense for policy faced opposition and delays in the Senate.
• Tom Sullivan, deputy chief of staff for policy, will replace Chollet at the State Department.
• Chollet's appointment comes ahead of the 2024 elections, with key defense policies at stake.
• Austin praised Chollet's extensive experience and strategic vision in national security.