sentences:  De la Vega was the CEO of AT&T Mobility until 2014, when he was promoted to President and CEO of AT&T's combined Mobile & Business Solutions group.One of the main goals of de la Vega in this position is to develop AT&T's role in the Internet of Things and to deliver integrated services to business customers.In 2016 he became the Vice Chairman of AT&T Inc. and CEO of AT&T Business Solutions and AT&T International.