He won a bronze medal in the normal at the Junior World Ski Championships in Harrachov in 1993 and won two medals at the 2001 FIS Nordic World Ski Championships in Lahti with a gold in the team large hill and a bronze in the team normal hill events.

He also finished third in the team event at the FIS Ski-Flying World Championships 2006 (15 January).

Herr's best individual finish was 2nd in the large hill in Kuusamo (Finland) on 27 November 2004.

On 8 January 2005 he was victorious in the team large hill World Cup jumping at Willingen.

But on 3 June 2009 it was told that he wished to start again for the German team from 2009-10, his goal was to compete in the Winter Olympics at Vancouver.