Complex sentence: From 1993 to 1997 Sagmeister was a lecturer at Berkley College of Music in Boston and since 1999 he is a tenured professor at the College for Music and Performing Arts in Frankfurt.
Split into simpler sentences: From 1993 to 1997 Sagmeister was a lecturer at Berkley College of Music in Boston. Since 1999 he is a tenured professor at the "College for Music and Performing Arts" in Frankfurt.