The turmoil at Clearwire continues. The company announced today that CEO Bill Morrow is stepping down for “personal reasons,” effective immediately. Several other top executives also were shown the door. The specifics around Morrow’s resignation were not provided in today’s SEC filing, but the departure comes amid a period of change at the Kirkland broadband wireless company.

In the meantime, Chairman John Stanton — the former CEO of T-Mobile USA — has been named interim CEO as the board seeks a replacement.

Clearwire has faced significant challenges over the past six months, cutting staffers and, most recently, getting embroiled in a wholesale pricing dispute with its largest shareholder, Sprint Nextel.

There have also been recent rumors that T-Mobile was looking to do a deal with Clearwire, which is building out a 4G WiMax network in the U.S.

The company also announced that Erik Prusch, currently the Chief Financial Officer, has been appointed as the company’s Chief Operating Officer. Additionally, Kevin T. Hart is stepping down as Chief Information Officer and that G. Michael Sievert is leaving the Chief Commercial Officer role.

Interestingly, the news of Morrow’s departure comes almost exactly two years after he was appointed CEO. Morrow, the former President and CEO of Pacific Gas and Electric Company, is 51.

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