Carrier Corporation (Farmington, CT) has announced several promotions and appointments. John F. Malloy is now president, Residential and Light Commercial Systems; Anthony J. Guzzi is now president, Commercial Systems and Services; Frank Hartman, is now president, International Comfort Products; Dr. Sophie Vandebroek, has been appointed as vice president of technology; Bruce Burdon has been appointed general manager, Applied Systems; Dave Roth, is now vice president and general manager Carlyle Compressor; Tom Gaubatz, is now general manager, Airside Systems; and Dan Williams was named general manager Commercial Unitary Systems for Carrier’s Commercial Systems and Services business unit.