In 1956, Security Service Federal Credit Union opened its doors with eight members and $25 in deposits. Security Service was founded as a not-for-profit, member-owned financial institution to serve the financial needs of the U.S. Air Force Security Service Command. Since those humble beginnings, it has become the eighth largest credit union in the U.S., serving more than 787,000 members worldwide.Headquartered in San Antonio, the credit union has more than 36 service centers in Texas and 19 locations in Colorado. Service areas in Texas include Central Texas, the Rio Grande Valley, the Coastal Bend, and El Paso. Security Service also serves Colorado with locations in Pueblo, Colorado Springs, Denver, Aurora, Fountain, and Northern Colorado.