A person working in the criminal justice field can find employment as a probation officer, a parole officer, a criminal treatment specialist, and a pretrial service officer.  Probation officers are sometimes referred to as community supervision officers.  The role of the probation officer is to supervise those who have been placed on probation. 

A probation officer, who is also referred to as a community supervision officer in some States, is a person who oversees individuals who have been put on probation.  A parole officer, on the other hand, works with individuals after they have been released from prison while a probation officer works with those who were assigned probation instead of prison. 

A correctional treatment specialist is also sometimes referred to as a case manager.  The correctional treatment specialist counsels offenders and develops individualized plans in order to work toward rehabilitation.  The correctional treatment specialist also works an offender after being released from prison or are he or she has been taken off of parole. 

A pretrial service officer is responsible for completing investigations on suspects before they have a trial.  This investigation is completed in order to determine if the suspect should be released before the actual trial.  If the person is released before the trial, the pretrial service officer supervises the individual until the trial takes place.