Cyberguards were Cybermen who were assigned to security duties.
During the 1986 invasion of Earth, the Mondasian Cyberguards stood within their Cybercraft. (PROSE: Doctor Who and the Tenth Planet)
In 2526, Cyberguards accompanied the Cyber-Leader who invaded Briggs' freighter. (PROSE: Earthshock)
Cyberguards were stationed on Telos. (PROSE: Attack of the Cybermen)