T-Mobile USA, Inc., today announced the appointment of Michael Sievert, a 20-year marketing veteran of the tech and telecom sectors, as the company's new chief marketing officer, effective Nov. 19. ... more 

T-Mobile USA, Inc., today announced the appointment of Michael Sievert, a 20-year marketing veteran of the tech and telecom sectors, as the company's new chief marketing officer, effective Nov. 19. (Photo: Business Wire)Multimedia Gallery URL less