The Advanced Systems and Development Directorate (SMC/AD) is a directorate of the United States Space Force's Space and Missile Systems Center, located at Kirtland Air Force Base.

It has operating divisions at Los Angeles Air Force Base, Hill Air Force Base, and Johnson Space Center.

[1] In June 1992 the Space and Missile Systems Center created the Space Experimentation Program Office, consolidating the Rocket Systems Launch Program (RSLP), Department of Defense Space Test Program (STP), the Research and Development Space and Missile Operations program (RDSMO), and test and evolution functions at Vandenberg Air Force Base into the new organization.

In June 1993 the research, development, test and evaluation functions of the Space Test Program, located at Los Angeles Air Force Base, Research and Development Space and Missile Operations program, located at Onizuka Air Force Station, and the Rocket Systems Launch Program, located in San Bernardino, California, were moved to Kirtland Air Force Base.

[1] On 1 August 2006 the Space Development and Test Wing was activated, replacing SMC Directorate 12.