Complex sentence: Besides conducting various ensembles at the Crane School of Music, Brock has also conducted various ensembles around the world, including the Philadelphia Orchestra, and he conducted the orchestra and chorus at the closing ceremonies of the 1980 Winter Olympics in Lake Placid.
Split into simpler sentences: Besides conducting various ensembles at the Crane School of Music, Brock has also conducted various ensembles around the world, including the Philadelphia Orchestra. He conducted the orchestra and chorus at the closing ceremonies of the 1980 Winter Olympics in Lake Placid.