Complex sentence: At age 22, Rabbi Mendelson found a position as the Rabbi/Dayan of Leeds (and of the "Chevras Torah" shul therein), and sent for his cousin, Feiga, who was betrothed to him.
Split into simpler sentences: At age 22, he found a position as the Rabbi/Dayan of Leeds (and of the "Chevras Torah" shul therein). He sent for his cousin, Feiga, who was betrothed to him.