Mr. Costas Papamantellos Chairman & CEO RWE Renewables Hellas Managing Director & Head RWE Energy Transition Investments Managing Director & Head of Energy Transition Investments Costas is an investment and commercial executive with over 20 years’ experience across the entire value chain of the energy industry. Costas joined the RWE Group in 2008 having a background in management consulting and engineering. Costas holds an MSc and PhD degree in Engineering from RWTH Aachen in Germany.