LUXEMBOURG--(BUSINESS WIRE)--Intelsat S.A. (NYSE:I), the world’s leading provider of satellite services, announced today that current Intelsat President and Chief Commercial Officer Stephen Spengler has been promoted to Deputy Chief Executive Officer, effective immediately. Under the company’s succession plan, Intelsat Chairman and Chief Executive Officer David McGlade will transition to the position of Executive Chairman, effective April 1, 2015, at which time Mr. Spengler will become Chief Ex