Bureaucrat
Bureaucracy
noun
A government colleague is one who works for and is part of the bureaucracy, making him/her a bureaucrat.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
あの官僚が我々の素晴らしい提案を断ったなんて信じられないよ。
I can’t believe that the bureaucrats turned down the great offer we made.