Carrier Corporation (Farmington, MD) has announced several personnel changes. John F. Malloyis now president, residential and light commercial systems; Anthony J. Guzziis now president, commercial systems and services; (CSS).Frank W. Hartman will become president, International Comfort Products; andDave Roth is now vice president and general manager of Carlyle Compressor. Roth succeeds Robin Baird, who will lead the manufacturing, design, distribution, sales, service and installation activities for Carrier Refrigeration Operations’ (CRO) Tyler Refrigeration business unit.