Nauen, who has been with Siemens since 1991, will take up his new role on October 1. He has been CEO of Siemens' wind energy arm since 2004. He has been replaced with immediate effect by Jens-Peter Saul who was previously managing director of Siemens Energy UK.
Nauen's departure will come as a blow to Siemens. Nauen leaves the company having announced in January a bulging order book for the German conglomerate's Danish wind turbine department of €7000 million. The department delivered €114 million of the €121 million profit reported for Siemens Danmark.
Current REpower chief executive Per Hornung Pedersen will remain an executive board member but will move to take on the new role of chief business development and business strategy officer.
Nauen’s appointment was announced by Tulsi Tanti, chairman and managing director of REpower-owner Suzlon.
Tanti said: "Nauen has an incredibly impressive record – indeed, the Siemens business he runs today is about Euros 3 billion. He is deeply passionate about renewables and has the experience, energy and vision to take REpower through its next stage of growth."
Nauen said: "REpower has a well deserved reputation for engineering, innovation, quality and customer experience.
"It has an impressive order book and my task is to now take that success and grow it – sustainably – further and faster, together with securing our place in the market as a technology leader. I hugely enjoyed my time with Siemens and now look forward to lead REpower into a new era and continue to work in a fascinating and future oriented business."
For more see Repower shakeout signals major overhaul