Zarian has owned Zarian Enterprises since 1999. He was a board member for Metrolink from 1996 to 2004, a member and chair of the Los Angeles County Metropolitan Transportation Authority from 1993 to 1997 and member and vice chair of the National Highway Safety Commission from 1986 to 1990.
He served as member of the Glendale City Council from 1983 to 1999, where he also served four terms as mayor. This position requires Senate confirmation and the compensation is $100 per diem. Zarian is a Republican.