Willem Coppoolse, has resigned after one year as head of the Naftogaz Trading division

 and CEO of Naftogaz Trading Gas Supply Company, the state oil and gas company reports.  Naftogaz group chief operating officer Otto Waterlander will be acting head of the Trading division. Iryna Zhuravliova, head of the business operations, has been appointed acting CEO of Naftogaz Trading Gas Supply Co.