In September 2008, the 63rd and 90th Regional Readiness Commands combined into the 63rd which was redesignated the 63rd Regional Support Command again, with its new headquarters at Moffett Field, California. As a key component of the Army Reserve's transition to an operational force, the newly formed 63rd RSC has foregone command and control of units in favor if a greatly expanded area of responsibility. The 63rd RSC provides base support and administrative support to over 40,000 Army Reserve soldiers in the southwest United States.