Yahoo mobile leader Marco Boerries is leaving his post as executive vice president after four years with the firm on the eve of what is expected to be a major internal reorganization at Yahoo as the embattled Web pioneer attempts to press ahead with its turnaround strategy.

A company spokesperson told InternetNews.com Boerries' resignation was related to personal reasons.

The news comes one day after Yahoo's news leader Neeraj Khemlani announced he was taking a job with publishing giant Hearst and a week after the Web giant announced the upcoming launch of its new Yahoo Mobile service.

The Yahoo Mobile service, now in beta and announced during the Mobile World Congress event earlier this month, was described by Boerries in a release as Yahoo's latest effort to transform a user's Internet experience.

Yahoo has developed an app for the iPhone, as well as Nokia, BlackBerry, Samsung, Sony Ericsson, Motorola handsets and one for devices running Windows Mobile platforms. Mobile device users are welcome to participate in the beta program, which is expected to go live in late March.

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