Clayton Cook is a lawyer working with McGown Cook in Calgary, where he represents unions in labour relations matters. He has practiced primarily in labour and employment matters since 1998. He regularly represents clients before various administrative bodies and the courts, and he advises clients concerning issues related to labour law, employment law, and human rights law.

Clayton attended the University of Alberta Law School. He was called to the Bar of British Columbia in 1992 and the Bar of Alberta in 1998.