Dillen has been shooting professionally for over 7 years, becoming even more serious about competition shooting in recent years. Since then, Dillen has competed in over 20 major matches and many more club matches. He primarily competes in the Tactical Optics division within 3-Gun, but he also has won matches in Limited/TacIrons, Open, and Tactical Optics at various levels of competition. Dillen enjoys shooting both bay based matches and larger natural terrain matches.