Dr. Özkan has undertaken extensive research on the theory and history of architecture, design, vernacular form and emergency housing, and has published numerous articles and monographs.
At METU he has taught architectural design and design theory for fifteen years, and became Associate Dean of the Faculty of Architecture in 1978; he was appointed Vice-President of the University in 1979. He has taught and lectured extensively in North America, Europe, Central-, South-, and South-East Asia, and throughout the Middle East. He has served as jury members for many architectural competitions, and as an external examiner for diploma and doctoral assessments at the Schools of Architecture at the Universities of Paris, Lausanne, York and Trondheim.
With the Aga Khan Award for Architecture in Geneva, Dr. Özkan served as Deputy Secretary General from 1983 to 1990, and has been the Secretary General since 1991. On behalf of the Aga Khan Trust for Culture, he has organized two international architectural competitions for the Revitalization of Samarkand, Uzbekistan (1991), and for the new Museum of Islamic Arts in Doha, Qatar (1997).