Refrigeration system commissioning requires a range of qualifications and skills, including knowledge of refrigeration system design, installation, and operation, as well as commissioning principles and practices. Commissioning professionals should have experience with refrigeration systems, as well as training in areas such as safety procedures, electrical and mechanical systems, and control systems. They should also have strong analytical and problem-solving skills, as well as excellent communication and documentation skills. In addition, commissioning professionals should be familiar with relevant industry standards and regulations, such as ASHRAE and IIAR guidelines.