LUXEMBOURG--(BUSINESS WIRE)--Intelsat S.A. (NYSE:I), the world’s leading provider of satellite services, today announced the promotion of two seasoned executives that have strong records of creating value and delivering results for customers to the company’s executive leadership team. The moves come as Stephen Spengler officially assumes the role of Chief Executive Officer on 1 April from Intelsat’s now executive chairman, Dave McGlade. Kurt Riegelman, 51, has been named Senior Vice President,