John worked at Torchwood One in Human Resources. He was known as "Jerky John" and was not much liked by Tommy Pierce or Ianto Jones. (AUDIO: Retirement Plan)
In 2005, John helped co-ordinate a supposed drill in Torchwood Tower and told Dave Cooke to go to the assembly point. (AUDIO: Locker 15) In 2007, Tommy used John's DNA as a placeholder to create multiple characters in a simulated reality. (AUDIO: Retirement Plan)