By Euan Rocha and Alastair Sharp TORONTO (Reuters) - BlackBerry Ltd said on Tuesday that John Sims will join the company as head of its global enterprise services business, a key segment that is likely to be at the core of the smartphone maker's turnaround plan. Waterloo, Ontario-based BlackBerry said Sims will join the company in January from software giant SAP AG, where he served as president of SAP's mobile services business. BlackBerry's Chief Executive John Chen said Sims' extensive experience in transforming businesses will be a tremendous asset to BlackBerry as the company seeks to revive its faded fortunes. Waterloo, Ontario-based BlackBerry pioneered the concept of on-the-go email, and for years its pagers and phones were must-have devices for political and business leaders.



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