Steiner participated in the 1998 and 1999 European Junior Championships, and the 2000 Junior World Championships.

At the 2000 European Junior Championships in Rijeka, Croatia he came in 8th place in the 94 kg category, with a total of 320 kg (142.5 kg snatch and 177.5 kg clean and jerk).

At the 2001 European Junior Championships in Kalmar, Sweden he won bronze in the −105 kg category, with 360 kg (165 kg and 195 kg).
At that time he competed for the AC Woge Bregenz weightlifting club.
At the 2002 European Junior Championships in Havířov, Czech Republic he  won bronze again in the −105 kg category, with 380 kg (172.5 kg and 207.5 kg).

Steiner won the Austrian National Championships in the +105 kg category in 2002 with a total of 370 kg, and in 2003 with a total of 390 kg.
Steiner participated in the 1998 and 1999 European Junior Championships, and the 2000 Junior World Championships.
At the 2000 European Junior Championships in Rijeka, Croatia he came in 8th place in the 94 kg category, with a total of 320 kg (142.5 kg snatch and 177.5 kg clean and jerk).
At the 2001 European Junior Championships in Kalmar, Sweden he won bronze in the −105 kg category, with 360 kg (165 kg and 195 kg). At that time he competed for the AC Woge Bregenz weightlifting club. At the 2002 European Junior Championships in Havířov, Czech Republic he  won bronze again in the −105 kg category, with 380 kg (172.5 kg and 207.5 kg).
Steiner won the Austrian National Championships in the +105 kg category in 2002 with a total of 370 kg, and in 2003 with a total of 390 kg.
Matthias Steiner