A watch repairer in Singapore is responsible for diagnosing issues with watches, disassembling timepieces to identify problems, repairing or replacing damaged components, cleaning and lubricating mechanisms, adjusting movements for accuracy, testing functionality, providing maintenance services, refurbishing antique watches, and offering advice on proper care and usage to customers. They need strong attention to detail, technical expertise, knowledge of various watch mechanisms, and excellent hand-eye coordination. Customer service skills are also important for interacting with clients and addressing their concerns.