Complex sentence: In 1960, Rabbi Stanley Rabinowitz was hired from Minneapolis, and remainrd the senior rabbi for 26 years, also servinged as president of the Rabbinical Assembly (a national organization of Conservative Jewish rabbis).
Split into simpler sentences: In 1960, Rabbi Stanley Rabinowitz was hired from Minneapolis. Rabinowitz would remain the senior rabbi for 26 years, and served as president of the Rabbinical Assembly (a national organization of Conservative Jewish rabbis).