Mike Sievert Short biography
Mike Sievert is an American business executive who is the president and CEO of T-Mobile US. He has held this position since April 2020, when he succeeded John Legere. Sievert has been with T-Mobile since 2012, when he was hired as CMO. He became COO in 2015 and president in 2018. Under Sievert's leadership, T-Mobile has surpassed 100 million total customers and created the first nationwide standalone 5G network in the U.S.
Prior to joining T-Mobile, Sievert held executive positions at AT&T Wireless, Microsoft, and Clearwire. He also co-founded Switchbox Labs, a startup that was acquired by Lenovo in 2009.
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