Your commitment to provide the highest quality worker to meet our needs has proven to be a successful partnership. Your team consistently demonstrates superior service by providing personalized understanding of our needs, culture, and philosophy. I would like to give special thanks to [the staff member who manages our account] for her tireless efforts, attention to detail and our commitment that people are our greatest asset. On behalf of our management team, please accept our thanks for a job well done. We look forward to many more years working together.