Sebastian Bönig (born 26 August 1981 in Erding) is a German football coach and former player, who is the currently assistant manager of Bundesliga club Union Berlin. During his playing career, he played for Bayern Munich (A), LR Ahlen, Union Berlin, and BFC Viktoria 1889.
His brother, Philipp Bönig, is also a professional footballer.
Sebastian Bönig at fussballdaten.de (in German)