Dr. Clement McCalla received his PhD in Mathematics from MIT in June 1973. He had appointments as a Visiting Assistant Professor at RPI for the academic year 1973/1974, and as an Assistant Professor at Howard University from 1974 through 1978. He joined Bell Telephone Laboratories in June 1978 as a Principal Member of Technical Staff, and after various corporate reorganizations retired from AT&T in March 2015. So far in retirement, he has been following up on research initiated in his academic and corporate experience.