Microsoft has appointed John Stanton to the company’s board of directors, increasing the board’s size to 11 members.

Stanton currently serves as chairman of Trilogy Equity Partners, a private equity fund, and Trilogy International Partners, a wireless operator in Central and South America and New Zealand.

Stanton led four of the top wireless operators in the United States over the past three decades, and operated wireless networks in Europe, Africa, Central and South America, and New Zealand. During the 1980s, he served as chief operating officer and vice chairman of McCaw Cellular. From 1992 to 2005, he served as chairman and chief executive officer of Western Wireless. Between 1995 and 2003, he served as chairman and chief executive officer of VoiceStream Wireless, which was acquired by Deutsche Telekom and subsequently renamed T-Mobile USA.