Mike Sievert cut his last ties with T-Mobile US, resigning from the board and stepping down as vice chair a little over a year after he gave up the CEO job.

In a filing with the US Securities and Exchange Commission (SEC) Sievert (pictured) told the board he would resign from it and from its Transaction Committee on 1 November.

T-Mobile noted the resignation is not the result of any disagreement with the company over operations, policies or practices.

Recon Analytics founder and analyst Roger Entner noted on X Sievert’s exit echoes the departure of his predecessor John Legere years earlier.

The timing matches the expiry of an amendment to his employment agreement and made in September 2025 and completes a handover process begun when T-Mobile confirmed then COO Srini Gopalan would succeed Sievert as CEO.

A contract struck with Sievert in 2023 would have seen him remain CEO until 2028. He was appointed to the post in 2020 when T-Mobile closed its merger with Sprint.

He took on the vice chair post to stay involved in the management of the company and on the board.

Gopalan became T-Mobile’s COO in March 2025 after heading Deutsche Telekom’s German business.

He joined the US operator’s board in 2022.

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