Melissa Karlovitch has held various HR positions in different companies such as GreatStar Tools USA, Arrow Fastener, Rust-Oleum Corporation, Zinsser Co., Inc, Littman Jewelers, and Unum. Melissa currently serves as the Group Vice President and Chief HR Officer at GreatStar Tools USA, showcasing their extensive experience in human resources management. Melissa's career path demonstrates their progression and expertise in the field of HR.