Braxton Carter is retiring as T-Mobile CFO on July 1. (T-Mobile Photo)

Braxton Carter, the magenta-cowboy-hat wearing finance executive who kept the books during T-Mobile’s resurgence for the past seven years, will be retiring as chief financial officer on July 1, the Bellevue, Wash.-based wireless carrier announced Wednesday afternoon.

He will be succeeded by Peter Osvaldik, the company’s current senior vice president of finance and chief accounting officer, who has been with the company for almost five years.

“Peter brings his proven leadership capabilities and strong financial acumen into this position at a critical time in the Un-carrier’s history, as we manage the significant complexities and huge opportunities inherent in this next chapter, integrating Sprint and delivering on the financial potential of the new T-Mobile,” said T-Mobile Chief Executive Officer Mike Sievert, in an announcement of the change.

Peter Osvaldik

Carter was the company for 19 years, starting with MetroPCS prior to its acquisition by T-Mobile. He had previously extended his planned departure during the company’s extended wait for legal and regulatory approval of its $26.5 billion merger with Sprint. The deal was completed in April.

It’s the latest in a series of changes at the company in conjunction with the merger. Sievert succeeded previous CEO John Legere when the deal closed in another planned executive transition.

It’s also the latest development in an eventful week for the company. T-Mobile reportedly laid off hundreds of Sprint employees earlier this week, and suffered an extended data and voice outage.

On Wednesday the company said it received clearance from the Department of Justice to sell off Sprint’s Boost Mobile business to Dish Network on July 1 as part of the merger agreement.

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