Klaus Werner Iohannis, sometimes referred to by his initials KWI in the Romanian press, is a Romanian politician, physicist, and former physics teacher who has served as president of Romania since 2014. He became the president of the National Liberal Party (PNL) in 2014, after previously serving as the leader of the Democratic Forum of Germans in Romania (FDGR/DFDR) between 2002 and 2013. Prior to entering national politics, he was a physics teacher at the Samuel von Brukenthal National College in his native Sibiu.