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.
Gueron, alongside rabbis from İzmir and Seres, was selected to resolve a rabbinical dispute in Constantinople. He was then appointed as the acting chief rabbi of Istanbul by both Abdulmecid I and his successor Abdülaziz.