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Sidney Whelan is an accomplished Licensed Real Estate Salesperson at Core Group Marketing, with over fifteen years of experience in residential real estate brokerage in New York. Previously, Sidney served as Senior Vice President and Licensed Real Estate Salesperson at Halstead Property, LLC, where notable achievements included managing onsite sales for several major condominiums and providing marketing consulting and crisis management for new developments. Sidney's career began in arts marketing, holding positions such as Principal at The Whelan Agency and Publicist for Harman How To Listen, where efforts focused on promoting music education and artist visibility. Sidney holds a BA in History from Oberlin College and is a graduate of Milton Academy.