First Cyberman

A first Cyberman was the second in command of an ancient Cybership along with a Cyber-Leader, which attempted to destroy Voga, the planet which had caused their downfall in the Cyber-Wars.

The Cybermen took over the Nerva Beacon and sent the Fourth Doctor, Commander Stevenson and Lester down to the planet, attached with Cyber-bombs, to destroy the core of Voga. When the plan failed, the Leader decided to fill the Beacon with bombs and ram it into Voga.

They evacuated the beacon, but their ship was destroyed by the Vogan rocket Skystriker. (TV: Revenge of the Cybermen)

Behind the scenes
This Cyberman's position is equivalent to the Cyber-Lieutenant rank which would later be introduced in Earthshock.