Complex sentence: After several years working as a manager in Rochester, NY stationery-bookstore chain in the 1970s, he briefly moved to Boston, returning to Rochester and taking a position at the University of Rochester's Memorial Art Gallery directing educational programs.
Split into simpler sentences: After several years working as a manager in Rochester, NY stationery-bookstore chain in the 1970s, he briefly moved to Boston. He later returned to Rochester and took a position at the University of Rochester's Memorial Art Gallery directing educational programs.