A CNA at a correctional facility has similar duties as a certified nursing assistant in a hospital. The only real difference is the environment. You assist a patient who requires medical care while in prison. Your responsibilities typically include helping with self-care tasks, such as feeding and dressing, taking vital signs, and documenting the inmate’s history as their primary caregiver. You work under the supervision of an RN. Most positions exist in local or state corrections facilities. It requires physical stamina, as you spend long periods spent on your feet. Much like in a hospital, you should expect to work odd hours.