 He became rabbi in 1835 at the age of twenty-two, and eleven years later met Sultan Abd al-Majid, whom he induced to restore the privileges formerly conceded to the non-Muslim communities.Gueron, with the rabbis of İzmir and Seres, was made an arbitrator in a rabbinical controversy at Constantinople, and was chosen acting chief rabbi of the Turkish capital in 1863.Both Abdulmecid I and his successor Abdülaziz conferred decorations upon him.