Complex sentence: Shihabi served as interim CEO since July 2013 until May 2015, when Mostefa Souag announced he was to be replaced by Al Anstey, following revelations of a lawsuit against the network by a former employee.
Split into simpler sentences: Shihabi served as interim CEO since July 2013 until May 2015. In May 2015, Mostefa Souag announced Shihabi was to be replaced by Al Anstey, following revelations of a lawsuit against the network by a former employee.