18 U.S.C. § 3602: Appointment of probation officers

A district court of the United States shall appoint qualified persons to serve, with or without compensation, as probation officers within the jurisdiction and under the direction of the court making the appointment. A person appointed as a probation officer in one district may serve in another district with the consent of the appointing court and the court in the other district. The appointing court may, for cause, remove a probation officer appointed to serve with compensation, and may, in its discretion, remove a probation officer appointed to serve without compensation. The order of appointment shall be entered on the records of the court, a copy of the order shall be delivered to the officer appointed, and a copy shall be sent to the Director of the Administrative Office of the United States Courts. If the court appoints more than one probation officer, one may be designated by the court as chief probation officer and shall direct the work of all probation officers serving in the judicial district.