A Senior Vice President with CBRE's Long Island office, Robert Seidenberg is a 30-year veteran of the commercial real estate industry in both the Long Island and New York City markets. Prior to the merger with CBRE, he was a Managing Director with Insignia/ESG, Inc. Before that, Mr. Seidenberg was a Vice President of Helmsley-Spear, Inc., specializing in tenant and landlord representation, property management and the hiring and training of new brokers.