Most prison wardens start as a correctional officer and transition into becoming a prison warden later in their career. Employers prefer that you have extensive experience before becoming a warden. Therefore it is recommended that you seek employment as a correction officer, probation officer, police officer, crime scene investigation, or some law enforcement career before looking to become a warden. A lot of these programs are offered through vocational schools or community colleges. They vary in length and can last anywhere from 6 months to 2 years.