With Mari Vartmann, he won four senior international medals and finished seventh at two European Championships.

During the 1999 JGP series, he won gold in Zagreb, Croatia, and placed fourth at his second assignment, in Ostrava, Czech Republic.

He continued competing in men's singles for five more years before switching to pair skating in Berlin.

[3][4] Vartmann/Just became three-time German national medalists and appeared at four ISU Championships, finishing 18th at the 2006 Worlds in Calgary, Alberta, Canada; 7th at the 2007 Europeans in Warsaw, Poland; 18th at the 2007 Worlds in Tokyo, Japan; and 7th at the 2008 Europeans in Zagreb, Croatia.

At 2011 German Nationals, they won the bronze medal and were selected to compete at the European Championships.