T-Mobile says Mike Sievert will become CEO in May, following the end of current CEO John Legere’s contract.

The company said Monday that the move is part of its succession plan.

Legere has been rumoured as a possible CEO for WeWork.

“John Legere has had an enormously successful run as CEO. As the architect of the Un-carrier strategy and the company’s complete transformation, John has put T-Mobile US in an incredibly strong position. I have the highest respect for his performance as a manager and as a friend, I am very grateful to him for the time together,” said Tim Höttges, Deutsche Telekom CEO, and Chairman of the Board of T-Mobile US, in a statement.

FCC formally approves T-Mobile merger with Sprint but deal still faces hurdles

“John taught everyone at T-Mobile that if you listen to customers and empower employees, you can change a culture – and by doing so – change a company and an entire industry. On behalf of the Board of Directors, I would like to thank John, and of course Mike, and all the employees for everything they have achieved over the past seven years. We have tremendous respect for John’s leadership and appreciate his incredible contributions to T-Mobile’s success. The Board is pleased that John will support this leadership transition while focusing on closing our pending acquisition of Sprint.”

Legere will remain with the company as a board member. Sievert, who has worked with Legere for the past seven years, currently serves as president, chief operating officer and a director.

“In the months ahead, my focus will be on ensuring a smooth leadership transition and continuing to work closely with the Board and Mike to complete the Sprint transaction,” added John Legere. “This merger will create the New T-Mobile – a company that is uniquely positioned to continue disrupting the wireless category – and beyond. This marks the beginning of a dynamic new chapter for T-Mobile.”