Brian Rosen Brian Rosen is Colliers' President and Chief Executive Officer | Canada and President, Northeast Region Brokerage | U.S. TORONTO, Nov. 05, 2025 (GLOBE NEWSWIRE) -- Global diversified professional services and investment management company, Colliers (NASDAQ and TSX: CIGI) today announced the appointment of Brian Rosen to the role of President, U.S. Northeast Region Brokerage in addition to his current position as President and Chief Executive Officer | Canada. Rosen’s new responsibilities wil ...