MIKE SIEVERT is the former Chief Executive Officer and current Vice Chairman of the board of directors of T-Mobile, one of the world's largest telecommunications companies. He served as Chief Executive Officer from April 2020 through October 2025. . Mr. Sievert also served as T-Mobile’s President, Chief Operating Officer, and Director from 2018 to 2020 and as Chief Operating Officer from 2015 to 2018, and as Executive Vice President and Chief Marketing Officer from 2012 to 2015, after joining T-Mobile in November of 2012. Prior to joining T-Mobile, Mr. Sievert held senior executive positions at Clearwire (2009 to 2011), which is now part of T-Mobile, Microsoft (2005 to 2008), AT&T Wireless (2002 to 2004), and E*TRADE (1998 to 2001). In addition, he has served as an entrepreneur and investor involved with several Seattle-area start-up companies. In 2008 and 2009, Mr. Sievert was cofounder and Chief Executive Officer of Switchbox Labs, Inc., a consumer technologies developer, leading up to its sale to Lenovo, where he briefly served after the acquisition. Sievert started his career with management positions at Procter & Gamble and IBM.
Mr. Sievert’s extensive executive leadership experience for both public and private companies enables him to evaluate and make informed decisions on strategic initiatives across the spectrum. On matters of marketing and branding in particular, his decades-long tenure with a host of the world’s most prominent companies allows him to provide insightful guidance that will help Starbucks maintain and bolster its status as one of the world’s most wellknown and well-respected brands. Finally, as a long-time executive at one of the foremost Seattle-area companies, Mr. Sievert brings an understanding of how Starbucks Seattle roots have shaped its past and will continue to shape its future.
Committee(s):
- Compensation and Management Development Committee