Implenia announced that René Zahnd, until now Head of the Buildings Business Unit, is becoming Head of the Modernisation & Development Business Unit with effect from 1 February 2014. Reimer Siegert, who was in charge of the Business Unit, is leaving the company by mutual consent. Stephan Wüstemann, previously the Buildings Business Unit's Deputy Head, is taking over as the new Head of Buildings.

As such he joins Implenia's Group Executive Board.