Keith Plumb, president and COO of regional fractional-share provider Executive AirShare, will add the role of CEO starting on January 1. Current chairman and CEO Bob Taylor will step down at the end of the year, at which time he will become chairman emeritus and founder, while remaining an active board member. Plumb and Taylor founded Executive AirShare in 2000. “We are finishing our best year in the history of the company and now is the time for this change,” Taylor said. “I want to continue my contact with Executive AirShare fractional owners and look forward to expanding and creating more solid relationships with our company.”