After around 15 years as managing director, Roland Ollek hands over the position as CEO to Thorsten Lipp. Uwe Milde, previously Head of Development, is also appointed to the management board as CTO alongside CFO Nils Strauch. Guntermann & Drunck GmbH (G&D) based in Siegen, Germany, realigns the executive management. Roland Ollek leaves the company …