Time Technician
On the Gallifrey of the 89067986779811167562948736197891674912223184th Universe, the Time Lords Andro and Fabian worked as Time Technicians in the Old Workshops. While they were fully-qualifie graduates of the Academy, there were also Junior Time Technician who'd “fast-tracked through the Academy just to get their hands on a real TARDIS sooner — if only as a repairman”. These low-ranking Junior Technicians wore distinctive maroon uniforms in a simple, practical style. (PROSE: How To Steal Timeships & To Influence Time Lords)
Behind the scenes
The Time Lord title of Time Technician originated in non-televised Doctor Who media and has never formally been used on television; though Andro and Fabian are seen to man a "TARDIS repair shop", their specific titles are not stated. The wheretos and wherefores of the Time Lord Clara Oswald splinter seen in The Name of the Doctor are likewise left to viewers' imagination, with her job as a Junior Time Technician being Aristide Twain's own coinage in PROSE: How To Steal Timeships & To Influence Time Lords.