corporate hyena

An employee whose aim is to climb up the corporate ladder by any means other than merit, including backstabbing, ass-licking, being a yes man, drastically changing opinion to suit circumstances, gossiping, bitching, corridor-talking, spreading lies, pitting colleagues against each other, spying and reporting on colleagues, etc.

Jack always sucks-up to his boss no matter what stupid ideas his boss comes up with, hoping to have an increase, what a corporate hyena!

Tom reports colleagues on any triviality so as to show he really cares for the company, hoping he will be the one to be promoted, what a corporate hyena!