26 April 1979|
|6 (2003, 2007, 2008, 2009, 2010, 2011)|
|4 (2007, 2008, 2009, 2012)|
Lang began his international career skipping the German junior team at the 1999 World Junior Curling Championships, where he finished 6th. He skipped the main German national team at the 2003 Ford World Men's Curling Championship, finishing in 9th place.
In 2007, Lang moved to the Andy Kapp rink, playing second for him. He earned a silver medal at the 2007 Ford World Men's Curling Championship in his first international event with the team. Later that year, he finished 5th at the 2007 European Curling Championships. Later that season, Lang was promoted to the third position on the team, and placed 8th at the 2008 World Men's Curling Championship, but then won a bronze medal at the 2008 European Curling Championships.