Assistant Secretary of Defense for Homeland Defense and Hemispheric Affairs

The assistant secretary of defense for homeland defense and hemispheric affairs, or ASD (HD&HA), is responsible for defense continuity and mission assurance; homeland defense and defense support of civil authorities; Arctic and global resilience; and U.S. defense and security policy for Canada, Mexico, Central America, the Caribbean, and South America.

The position was established by the National Defense Authorization Act for Fiscal Year 2003 (P.L. 107-314, passed 2 December 2002). In particular, the ASD (HD&HA) is responsible for homeland preparedness, oversight of the two combatant commands that cover North and South America, and the transfer of technologies to homeland security use, pursuant to Section 1401 of the 2003 DOD Authorization Act. The ASD (HD&HA) reports to the under secretary of defense for policy.