Aerospace Corp., El Segundo, named Samuel M. Tennant president and chief operating officer, succeeding Eberhardt Rechtin, who has headed the nonprofit research company for 10 years.
Tennant, whose promotion will be effective in December, was vice president of the programs group at Aerospace and was a member of the firm's executive group.
Tennant, who is also the co-inventor of the Travernetti-Tennant total knee prosthesis, started at Aerospace in 1961.
Rechtin was chief engineer at Hewlett-Packard before joining Aerospace in 1977. He also served as principal deputy director of defense research and engineering and was secretary of defense for telecommunications.
Tennant will become only the third president in Aerospace's 27-year history. The company was established by an act of Congress to provide the Air Force with engineering and architectural services for military space hardware.