Colleague's

Mr Brown is jealous of his colleague's success.

Our colleague's mother has died.

Our colleague's mother passed away.

There is no sound more pleasant than a colleague's gnashing of teeth.

Mary read Tom's colleague's business card and burst into a smile.

Mary read Tom's colleague's business card and started to smile.

Her male colleague's bulletproof vest held back a few bullets, but he was still fatally hit.