Bill Kowalczuk & David Harris return to CBW, Sean Adu-Gyamfi and Guy Hobson join the firm.NEW YORK, July 9, 2024 /PRNewswire/ -- Coldwell Banker Warburg (CBW), the premier brokerage that's been at the forefront of New York luxury real estate for more than 100 years, is pleased to announce that agent David Harris and broker Bill Kowalczuk have returned to CBW after brief stints at other brokerages, and that the company is also welcoming broker Sean Adu-Gyamfi and agent Guy Hobson.Bill Kowalczuk, Guy Hobson, ...