Technician (Rise of the Cybermen)

A technician was an employee of John Lumic in 2007.

Following Mr Crane's request for "track number 19", he obliged, playing "The Lion Sleeps Tonight" over the sound of screaming victims to cyber-conversion.

He worked on Battersea Power Station's computers and drove an International Electromatics lorry for the purpose of transporting Cybermen to the country mansion where Jackie Tyler celebrated her birthday. (TV: Rise of the Cybermen)

Behind the scenes
In a deleted scene in The Age of Steel, the technician's name is revealed to be Jackson.