• Under Secretary of Defense
• Deputy Under Secretary
• Military Deputy
• Chief of Staff
• Health Affairs
• Manpower & Reserve Affairs
• Readiness
  
• Defense Human Resources Activity
• Office of Force Resiliency (OFR)

The Under Secretary for Personnel and Readiness is the principal staff assistant and advisor to the Secretary and Deputy Secretary of Defense for Total Force Management as it relates to readiness; National Guard and Reserve component affairs; health affairs; training; and personnel requirements and management, including equal opportunity, morale, welfare, recreation, and quality of life matters.