Cadence Design Systems announced the promotion of three executives under new company president and CEO Jack Harding. Effective immediately, K.C. Murphy will assume Harding's former position as executive vice president for the strategic business group; John Olsen will be executive vice president of worldwide sales and marketing; and Shane Robison will be executive vice president of research and development. All three will report to Harding, who was chosen to lead Cadence following the resignation of long-time president Joe Costello last week.