Assistant secretary of defense
- Assistant secretary of defense for strategy
- Assistant secretary of defense for strategy plans and capabilities
- Assistant secretary of defense for health affairs
- Secretary of defense assistant
- Assistant secretary of defense for international security affairs
- Assistant secretary of defense for industrial base policy
- Assistant secretary of defense for sustainment
- Assistant secretary of defense wallander
- Assistant secretary of defense for readiness
- Assistant secretary of defense for cyber policy
- Assistant secretary of defense for space policy
- Assistant secretary of defense for science and technology
- Assistant secretary of defense for mission capabilities
- Assistant secretary of defense for public affairs
- Assistant secretary of defense for critical technologies