Lecturer

A lecturer was a person who gave lectures, typically at universities (TV: The Pilot, AUDIO: The Marian Conspiracy)

The Twelfth Doctor worked as a lecturer at St Luke's University for at least 50 years. (TV: The Pilot, Knock Knock)

Evelyn Smythe, a companion of the Sixth Doctor, was a lecturer at Sheffield Hallam University before joining the Doctor as his companion. (AUDIO: The Marian Conspiracy)