Eberhardt Rechtin, who played a key role in the development of space technology during the Cold War, died Friday at Torrance Memorial Hospital after lengthy battles with several illnesses. He was 80.

Rechtin, of Rolling Hills Estates, was chief executive of El Segundo-based Aerospace Corp. for 10 years, chief engineer of Hewlett-Packard Corp. and director of the Pentagon's Defense Advanced Research Projects Agency, among other positions that placed him at the forefront of U.S. national security. He later joined the faculty at USC, creating the school's first program in aerospace architecture.