Responsibilities: Nuclear and strategic forces; arms control and non-proliferation programs; space programs; Department of Energy defense nuclear, and defense environmental management programs; and ballistic missile defense.

Oversight of budget accounts: Procurement and RDT&E for DOD nuclear and strategic forces, missile defense, space systems, Department of Energy defense and non-proliferation programs.

Oversight of DOD and DOE officials Assistant Secretary of Defense for Nuclear and Chemical and Biological Defense Programs; National Nuclear Security Administration; and Assistant Secretary of Energy (Environmental Management).

Oversight of agencies, commands, and activities: U.S. Strategic Command; space commands of the military departments; Missile Defense Agency; National Nuclear Security Administration; and Defense Nuclear Facilities Safety Board; Defense Threat Reduction Agency.