Helsinki: Nokia's Chief Executive Officer Rajeev Suri will leave the telecom equipment provider in September, Nokia announced on Monday. He will be replaced by the head of Finnish energy group Fortum, Pekka Lundmark, who will take over on September 1. Suri said he wanted to do "something different" after having spent 25 years at Nokia. Suri, who has been Nokia's president and CEO since April 2014, had "indicated earlier to the board that he was considering stepping down from his role at some point in the future, provided a solid succession plan was in place," the company said. Suri's successor Lundmark has held various executive positions at Nokia, including vice president of strategy and business development at Nokia Networks from 1990-2000. Afterwards he served as CEO of Konecranes, a global leader in material-handling technology.