Warren has a Bachelor of Arts (Honours) Cum Laude (1997) as well as a Law Degree (2000). He has experience in Civil Litigation, Property litigation, Commercial disputes, Land Claim matters and Administrative Law. Warren has served as a Director of the Maritzburg College Foundation, as well as Honorary Secretary of Maritzburg College Old Boys Association, and Vice-Chairman of Merchiston Preparatory School Governing Body. His other interests include cricket and history.