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.

The president of Romania is the head of state of Romania. Following a modification to the Romanian Constitution in 2003, the president is directly elected by a two-round system and serves for five years. An individual may serve two terms. During their term in office, the president may not be a formal member of a political party. The president of Romania is the supreme commander of the Romanian Armed Forces.