The Commissioner of Correction shall appoint and may remove the following administrators, all of whom shall serve at the pleasure of the commissioner and shall be exempt from the classified service: All correctional wardens, including any warden with oversight of a district, a correctional institution, parole and community services, population management, programs and treatment, security and academy training or staff development. Such wardens shall possess skill and experience in correctional administration. The commissioner may designate a deputy warden to serve as director of reentry services.