There are lots of staff at Cherub. Teaching staff, Mission staff, Maintenance & Cleaners, Secruity, Training staff. In series 1 the Head of Cherub is Dr Terence Mcafferty. The Next Head is Zara Asker who is promoted in Man vs Beast.
The Next Main staff that you see a lot is the Mission Staff. The Mission Staff consists of Mission Controllers, Assistant Mission Controllers and Support Staff. The Senior Mission Controller is Ewart Asker.