Cyber-Leader

The Cyber-Leader served as leader of the Cybermen of another universe.

Biography
During the 2007 invasion of the Doctor's Earth, the Cyber-Leader was identified by black handle bars on its helmet. When the Leader was destroyed, the information it had was downloaded into another Cyberman who would be upgraded to Cyber-Leader. The first leader during the meeting with the Doctor was destroyed by the Preachers whilst the second was slain by Yvonne Hartman in her converted form. (DW: Army of Ghosts / Doomsday)

A Cyberman that was part of surviving Cybermen made from humans converted during the Battle of Canary Wharf (meaning they had not crossed the Void so they were not contamimated with Void stuff, thus not being sucked back in) became a Cyber-Leader after the battle. The Cybermen planned to open the Void and free the Cybermen trapped inside, however their plans were thawrted by the Tenth Doctor and Martha Jones. The Cyber-Leader was electrocuted by their own force field. (QR: Made of Steel)

When files from Torchwood were stolen by an info-thief, he used the information to create an army of Cybermen. However, the Cybermen turned on him and they attempted to take over the world of Centuria. (DWBIT: The Power of the Cybermen) A Cyber-Leader led the Cybermen during the attempt but the Tenth Doctor was able to get into their headquarters and destroy them. However, there was evidence that the Cyber threat was not totally ended. (DWBIT: Time of the Cybermen)

Another Cyber-Leader turned up in 1851 after escaping the Void, although this design of Leader was actually known as a Cyber-Lord. This leader had black handle bars and a redesigned black face plate with a transparent "window" through which its brain could be seen. This Cyber-Lord was destroyed by the CyberKing. (DW: The Next Doctor)

There were other Cybermen which managed to escape the Void. A Cyber-Leader led one group and they were able to develop an early stage of their space travel. Their ship was destroyed by a "rouge artefact" that was really a Dalek Time Axis. The Cyber-Leader was able to take over the systems of the SS Lucy Grey, however the Eleventh Doctor was able to overload the ship's systems and destroyed the Cybermen. (VG: Return to Earth)

When the Cybermen joined The Alliance formed to imprison The Eleventh Doctor in the Pandorica in order to save the Universe, the Cyber-Leader which fought in the Torchwood storage area during the Battle of Canary Wharf led the fleet which travelled to Stonehenge, 102 A.D. along with the rest of the Alliance and locked the Doctor in the Pandorica. (DW: The Pandorica Opens)

The Alliance's plan failed however, and as a result, several species, including the Cybermen, were wiped from existence, leaving only stone "after-images" behind. When the Doctor reset the universe and timeline, The Cyber-Leader along with all things that were destroyed throughout history, were restored to their original form and place in space and time. (DW: The Big Bang)

Alternative Timeline
During the war between the Cybermen and the Preachers in their own universe, a Cyber-Leader was selected by the Cybermen to lead them and replace the Cyber Controller. The Cyber-Leader coordinated the Cyber battle plans and the Cybermen proceeded to clear all the Preacher bases from the planet. The Cybermen victorious, the Cyber-Leader was seen as obsolete and deleted. (VG: Cyber Assault)