Bit different now though with all cam ops expected to balance, shoot, record and eat custard creams.
Unless you are doing live TV work a camera op does not need to fine tune color.
Putting colour temp in the ball park with presets and then recording on low compression 10 bit recorder allows for significant changes to be done in post.
CTOMO, subject heading is cineplex are you asking for advice on becoming a cineflex operator?
In respect to Jim Ball's observation it is not so much eating of custard creams but skill required in avoiding the custard pies that is useful, in what is a very competitive industry!
Mickjoebill