If that is truly her name, Christine Allan.
Talk about it here.
Doctorman Christine Allan was one of the creators of the Cybermen. She liked to drink the wine from the old regime on Mondas which slightly impaired her work. When the Fifth Doctor was brought to her, she analysed his body for a template for the Cyber race. This information improved the rate of survival among the Cybermen, starting with the Cyber-converted Thomas Dodd. (AUDIO: Spare Parts)