Aden, 41, will be responsible for fleet management, crewing, customer relations, chartering and quality.
He has been with the ER Group for eight years and has been on the board for the last two as managing director of ER Schiffahrt.
Hermann Klein, 57, has decided to leave after his three-year contract expires.
He has been CEO since 2012, as well as a managing director of ER Capital Holding.
Klein
