Complex sentence: John J Quinn is a well-known American theoretical physicist as well as an academic administrator; he is a former Chancellor and currently a member of the faculty at The University of Tennessee, Knoxville, USA.
Split into simpler sentences: John J Quinn is a well-known American theoretical physicist and who has also been an academic administrator. John Quinn is a former Chancellor and currently a member of the faculty at The University of Tennessee, Knoxville, USA.