T-Mobile CEO John Legere will step down from the chief executive seat next year, concluding a memorable tenure that saw the company transform into a disruptive force, shaking up the wireless industry and challenging incumbent leaders AT&T and Verizon.

Legere will be replaced as CEO by Mike Sievert, the company’s current president and chief operating officer, effective May 1, 2020, when Legere’s contract expires. In a news release, executives noted that Legere will remain on the board and focus on closing the company’s acquisition of Sprint.

‼️ I’ve got some important news! On May 1, I’ll be handing the magenta CEO reigns over to @SievertMike as my successor. This move has been under development for a long time and I couldn’t be more confident in the future of @TMobile under his leadership. — John Legere (@JohnLegere) November 18, 2019

WeWork is reportedly interested in tapping Legere as its next CEO, hoping the executive can apply his turnaround magic to the struggling co-working company. However, reports last week indicated that Legere was not interested in the job. In a call with analysts and reporters Monday morning., Legere denied reports that he was in talks to take over as WeWork CEO.

“I want to be clear; I was never having discussions to run WeWork,” Legere said. “And because we had this announcement pending, I couldn’t say that.”

As to what he will do next, the brash executive said he is not retiring. “I’ve got 30 to 40 good years and five or six more acts in me,” he said. Legere said he is getting lots of suggestions for companies that need the kind of cultural transformation that he instituted at T-Mobile.

Before he starts thinking about his next act, Legere says he wants to guide the Sprint merger to completion and help with the transition to the “New T-Mobile.”

‼️You’ve heard me joke that he’s “my son,” but in reality, since I hired him in 2012, @SievertMike’s been my mentee, my secret weapon and my friend. In our time we’ve launched 16 #uncarrier moves, shifted an archaic industry for consumers and wreaked havoc on the competition. pic.twitter.com/7MyX4i1vjd — John Legere (@JohnLegere) November 18, 2019

Legere has been grooming Sievert to succeed him for years. The move was meant to happen after the merger between T-Mobile and Sprint was approved, but the deal has taken longer than expected to close.

However, the company didn’t want to delay the change because T-Mobile sought to give regulators, customers and other stakeholders an assurance that the vision for the combined companies will remain in place after Legere moved on.

In addition to Legere’s departure, CFO Braxton Carter’s contract has been extended to July 1, 2020, and the company will look for a replacement. Neville Ray, T-Mobile’s CTO, has been promoted to the title of president of technology.

Since joining T-Mobile in 2012, Legere has helped turn around the company, guiding it to 26 straight quarters with more than one million net customer additions. Since he became CEO, Legere drove an aggressive campaign in which T-Mobile branded itself the “Un-carrier,” with new pricing strategies, subscriber benefits and promotions that forced rivals to change their own packages and promotions.

T-Mobile’s customer count now tops more than 84.5 million and is the nation’s third-largest wireless carrier behind Verizon and AT&T. Legere, known for guzzling Red Bull, running marathons, and his popular Slow Cooker Sunday cooking show, ranks No. 4 on Glassdoor’s Top CEOs list.

But Legere’s main accomplishment, if it goes through, will be the merger with Sprint. The deal will create a $146 billion wireless juggernaut, putting T-Mobile in its best position yet to challenge AT&T and Verizon.

Legere noted on a call with reporters and investors that the leadership change doesn’t impact the company’s commitment to completing the merger. However, the deal is still facing opposition in the form of a multi-state lawsuit brought by attorneys general who claim the merger will hurt consumers and competition.

Sievert has been with the company since 2012, starting as an executive vice president and chief marketing officer. He has served as an executive at a variety of big wireless and tech companies, including Microsoft, AT&T and Clearwire.

Developing story, more to come. Here is the full news release announcing the changes: