T-Mobile said G. Michael Sievert will leave its board and its Transaction Committee effective November 1, 2026. He will also stop serving as vice chair of the board and the company on that date, as an amendment to his employment agreement expires.
The announcement concerns Sievert’s board and vice-chair roles; it does not say he is leaving T-Mobile. The company said his resignation was not prompted by a disagreement over its operations, policies or practices.
- Sievert notified the board of his decision on October 26.
- His departure from the board and Transaction Committee takes effect November 1, the same day the employment-agreement amendment expires.
- T-Mobile did not name a replacement for his board seat or Transaction Committee role.