Mike Sievert T-Mobile Leading the customer-obsessed Un-carrier team , Sievert ’ s role as CEO has seen him and T-Mobile undertake a vast growth journey . Under his tenure , T-Mobile has experienced unprecedented growth by continuing to tackle customer pain points while introducing Un-carrier to new geographies , segments and product categories . Since joining T-Mobile journey in 2012 , Sievert has held a number of executive roles all while championing the simple but powerful Un-carrier formula of valuing customers , putting them first and changing the rules of the industry in their favour .

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Mike Sievert T-Mobile Leading the customer-obsessed Un-carrier team , Sievert ’ s role as CEO has seen him and T-Mobile undertake a vast growth journey . Under his tenure , T-Mobile has experienced unprecedented growth by continuing to tackle customer pain points while introducing Un-carrier to new geographies , segments and product categories . Since joining T-Mobile journey in 2012 , Sievert has held a number of executive roles all while championing the simple but powerful Un-carrier formula of valuing customers , putting them first and changing the rules of the industry in their favour .