Kim Ullman is leaving his role at the helm of Concordia Maritime and will be replaced by Erik Lewenhaupt.
The Stockholm-traded product tanker owner announced on Monday that Ullman would be departing the company at the end of the year, after informing it of his intention to retire.
Carl-Johan Hagman, Concordia's board chairman, said: "Kim is recognised in the market as a skilled and driven 'shipping man' and, as such, has made important contributions in a cyclical and at times challenging market.