Career
Football Club Magdeburg. Siefkes began his career with Hallescher Football Club, where he scored prolifically for the youth team, and made one appearance for the first-team, as a substitute for Angelo Hauk in a Regionalliga Nord match against SV Wilhelmshaven in May 2010. Shortly after this, he signed for Bayer Leverkusen, to play for the reserve team Liga. The season ended in relegation for Jena, and Christoph returned to Leverkusen for the 2012-2013 season.