AT&T vice chairman Ralph de la Vega will retire at the end of 2016 after a 42 year career with the telecom giant, CNET first reported and AT&T confirmed on Thursday.
AT&T Mexico CEO Thaddeus Arroyo will take over de la Vega's responsibilities as head of international and business operations.
Kelly King, senior vice president of AT&T's business group, will take over as head of AT&T's Mexico business.
De la Vega played an instrumental role in AT&T snagging iPhone exclusivity in the handset's early days, along with serving as COO of Cingular Wireless when it merged into AT&T Mobility.
Recently, de la Vega moved from heading AT&T Mobility, where he helped push the company from 3G to 4G, to business and international operations amidst a broader restructuring.