New York-based real estate investment banking firm Sonnenblick-Goldman has appointed Joseph L. Williams III as the managing director and principal for its New York headquarters. Williams has 27 years of real estate banking experience, most recently as the managing director and senior vice president of the investment properties group at CB Richard Ellis. His responsibilities at Sonnenblick-Goldman will include selling and financing major hotel, office, and mixed-use properties on a national and international basis.