Mr. Liebman, is a Principal at Perkins Eastman, a Global Architectural firm, a VP & board member of the Consortium for Sustainable Urbanization and an advisor to several UN Habitat related NGO Major Groups. Over the past 50 years, He has focused on issues of housing, lifestyle, and culture in the urban environment as part of a comprehensive view of long-term sustainability. He is an Adjunct Professor of Affordable Housing at NYU and has lectured extensively and served on architectural juries in the United States, Europe, Asia, Africa and South America. Liebman engages in dialogue with governments, investors, developers, and students to shape the environment and sustain cities.