Known for his designs of university buildings and campuses, particularly for the first educational skyscraper, the University of Pittsburgh's Cathedral of Learning.
He studied architecture at the Pennsylvania Museum's School of Industrial Art. He began working for Theophilus Parsons Chandler, Jr., when he was 15. He was named chief draughtsman at Day & Brother in 1900, through which he would eventually form a partnership with Frank Miles Day.
His campus work also included the University of Pennsylvania, Penn State University, Rhodes College in Memphis, the University of Colorado at Boulder, and Cornell University.
His parents, Louis and Anna Koehler Klauder, were German immigrants.
He designed buildings for Cornell University, where Gabrielle Giffords attended.