Stuart Denholm was promoted to director of the core market relationship management group at New York Life Retirement Plan Services, and Jim Byrne and Rob Mattson were both named vice presidents and executive relationship managers, confirmed spokeswoman Sarah Lazarus. Mr. Denholm will retain his responsibilities as executive relationship manager at the firm. All three positions are new. Messrs. Denholm, Byrne and Mattson all report to Tom Clough, senior managing director. Mr. Byrne was vice president of Taft-Hartley services for Diversified Investment Advisors, and Mr. Mattson was vice president of client services for Fidelity Investments. DIA spokeswoman Wendy Daniels was not available for comment at press time. Deborah Pont, spokeswoman for Fidelity, was not able to provide details by press time.