SGL Carbon SE will appoint Hariolf Kottmann as supervisory board head after the second candidate, Josef Kortuem, pulled out of the running. Kottmann, head of Swiss special chemicals producer Clariant, will replace Max Dietrich Kley, who is scheduled to leave in April 2013 at company's general assembly. Kottmann was on SGL's management board between 2001 and 2008.