Under the Probation of Offenders Act, 1958, apart from the court, who may appoint a probation officer…

Section 13(2) lets the court which passed the section 4 order, or "the District Magistrate of the district in which the offender for the time being resides", appoint a probation officer in place of the one named in the supervision order. The district that counts is where the offender currently lives, not where the offence occurred or the trial was held.