The best way to gain exposure to the field is to volunteer for a social service organization that provides assistance to parolees. Some agencies offer internship programs for students interested in the field. It may also be helpful to call a local government agency handling parole and to arrange an informational interview with a parole officer.

Parole officers play an important role in protecting society from crime. By helping, guiding, and supervising parolees, parole officers can reduce the chance that these individuals will again break the law and thus return to prison.

The regulations concerning parole differ from state to state. In some places, prisoners are given what are called indeterminate, or variable, sentences; if convicted of robbery, for example, an offender may be sentenced to no less than three years in prison but no more than seven. In this case, the prisoner would become eligible for parole after three years. In other places, an offender is given a definite sentence, such as seven years, but according to law may be paroled after completing a certain percentage of the sentence. Particularly heinous crimes may be excluded from the parole system.

Not all prisoners eligible for parole are released from prison. Parole is generally granted for good behavior, and those who successfully complete a drug or alcohol rehabilitation program, finish their GED (general equivalency diploma), or show other signs that they will lead a productive, crime-free life are considered good candidates for parole. In a few cases, such as prison overcrowding, prisoners might be released before they are technically eligible. The parole decision is made by a parole board or other government oversight committee.

The work of a parole officer begins when a prisoner becomes eligible for parole. A parole officer working inside the correctional institution is given the job of writing a report on the prisoner. To help determine the risks involved in releasing the prisoner, the report might discuss the prisoner's family background, lifestyle before entering prison, personality, skills, and job prospects, as well as the crime for which the prisoner was incarcerated and any other crimes committed. The parole board or other oversight body reviews the report; conducts interviews with the prisoner, the prisoner's family, and others; and then decides whether the prisoner is suitable for release. In some cases, the parole officer might be called to testify or may help the prisoner prepare for the meeting with the parole board.

If released, the prisoner is assigned to another parole officer outside of the correctional institution. The initial meeting between the prisoner and this parole officer, however, may take place inside the prison, and it is there that the parole officer explains the legal conditions that the prisoner must follow. Beyond refraining from criminal activity, common conditions are attending school, performing community service, avoiding drug or alcohol abuse, not possessing a gun, and not associating with known criminals.

At this point, the parole officer tries not only to help the parolee find housing, employment, job training, or formal education but also to provide counseling, support, and advice. The parole officer may try to help by referring the parolee to other specialists, such as a psychologist or a drug rehabilitation counselor, or to a halfway house, where the parolee can live with other former prisoners and may be assisted by drug abuse counselors, psychologists, social workers, and other professionals. Parolees with financial problems may be referred to welfare agencies or social service organizations, and the parole officer may help arrange welfare or other public assistance. This is especially important for a parolee who has a family. The parole officer also sets up periodic meetings with the parolee.

An important part of the parole officer's job may be to contact and talk with businesses that might employ former prisoners. The parole officer tries to alleviate the concerns of business leaders reluctant to hire parolees and to highlight the role of the business community in helping former prisoners begin a new life.

Much of the parole officer's work is directed toward ensuring that the parolee is upholding the release agreement. The parole officer might interview the parolee's teachers, employers, or family and might conduct other types of investigations. Records must be kept of the parolee's employment or school status, finances, personal activities, and mental health. If the parolee does not follow the release agreement, the parole officer must begin proceedings for returning the parolee to a correctional institution. In some places, the parole officer is charged with arresting a parolee who is violating the agreement.

Parole officers often have a heavy caseload, and it is not unusual for 50 to 300 parolees to be assigned to a single parole officer. With so many parolees to monitor, little time may be spent on any single case. Some parole officers are helped by parole aides or parole officer trainees. A job with similar responsibilities is the probation officer, and some officers handle both parolees and those on probation. As the title suggests, probation officers work with offenders who are given probation, which is the conditional suspension of a prison sentence immediately after conviction. Probation is often given to first-time offenders. Like parolees, those on probation must follow strict guidelines, and failure to do so can result in incarceration. Probation officers, like parole officers, monitor the offenders; assist with finding employment, training, or education; make referrals to therapists and other specialists; help arrange public assistance; interview family, teachers, and employers; and provide advice and guidance. Those who work with children may be called juvenile court workers.