Telecommunications giant T-Mobile US announced Mark Nelson will join the company as executive vice president and general counsel.

Nelson will start Oct. 11 and assume the general counsel position from Dave Miller, who announced his retirement after 26 years with T-Mobile. Miller will stay on as executive vice president and strategic advisor to help support the leadership transition until April 1, 2022.

Nelson will report directly to Chief Executive Officer Mike Sievert and have offices in Bellevue, Wash., and Washington D.C. He joins the company after having practiced law for over 25 years at Cleary Gottlieb, where he served as counsel to T-Mobile US for the past two decades and advised the company on a variety of matters, including its acquisition of MetroPCS and merger with Sprint.

Miller was named senior vice president and general counsel in 2001 and helped introduce the T-Mobile brand name in the United States. He was promoted to executive vice president in 2011.

The company also announced its board of directors elected Broady Hodder, senior vice president of corporate governance and strategic transactions, as corporate secretary, reporting to Nelson. Hodder joined T-Mobile’s legal team in early 2018 and will continue to be responsible for corporate and securities law compliance and managing legal teams representing the company in capital markets transactions, executive compensation matters, mergers and acquisitions, and other strategic transactions.