Control room assistant (Ross)
From Tardis Wiki, the free Doctor Who reference
A female assistant at Space Control once assisted in the Recovery 7 launch piloted by the Third Doctor. She was on the same team as controller Ralph Cornish and a fellow male assistant. (TV: The Ambassadors of Death)
Behind the scenes
Neither script nor credits give us any other way to distinguish the various control room assistants but by their actor's names.
