Michael Sievert

Michael Sievert (born 1969) is an American business executive. He is the former chief executive officer (CEO) and current vice chairman of T-Mobile US. In November 2019, T-Mobile announced that Sievert would be promoted from chief operating officer (COO) to CEO in May 2020 when John Legere stepped down. Sievert took control a month earlier than planned, in April 2020, the same day T-Mobile closed its merger with Sprint.