Complex sentence: For most of his career (1980-2008) he taught at Clark University in Worcester, Massachusetts, where he was the Alice C. Higgins and Milton P. Professor of Environment and Society, and Director of the Graduate School of Geography.
Split into simpler sentences: For most of his career (1980-2008) he taught at Clark University in Worcester, Massachusetts. There, he served as Alice C. Higgins and Milton P. Professor of Environment and Society, and Director of the Graduate School of Geography.