Complex sentence: After several years at the University of Michigan, he joined the staff of Georgetown University in Washington, D.C. At Georgetown, served as dean of the Institute of Languages (later renamed the Faculty of Languages and Linguistics), for 13 years.
Split into simpler sentences: After several years at the University of Michigan, he joined the staff of Georgetown University in Washington, District of Columbia. At Georgtown, served as dean of the Institute of Languages (later renamed the Faculty of Languages and Linguistics), for 13 years.