Hagai has been the director of the Jerusalem Intercultural Center since its establishment in 1999. In his work at the JICC, Hagai develops and implements models for making Jerusalem a culturally competent city for all its residents. In 1995-1997, Hagai was a researcher at the U.S National Institutes of Health (N.I.H.) and then returned to Jerusalem, where he graduated the Mandel School for Educational Leadership. During this period, he focused on multicultural models that combine different fields, such as political philosophy, conflict management, dialogue, community development and project management. He holds a Ph.D. in Computational Neuroscience, Hebrew University, Jerusalem.