The defender, who plays for German club Crefelder HTC, made his international senior debut for the national team on February 26, 2001 in a friendly against India in Bombay. As of December 18, 2005, Weß earned 137 caps for his native country, in which he scored 13 goals. Previously he played for Uhlenhorst HTC in Mülheim an der Ruhr.
Since the Athens Olympics he"s the captain of the Men"s National Team.
2001 – Champions Trophy, Rotterdam (1st place)
2002 – 10th World Cup, Kuala Lumpur (1st place)
2002 – Champions Trophy, Cologne (2nd place)
2003 – European Nations Cup, Barcelona (1st place)
2004 – Summer Olympics, Athens (3rd place)
2005 – European Nations Cup, Leipzig (3rd place)
2005 – Champions Trophy, Chennai (4th place)
2006 – Champions Trophy, Terrassa (2nd place)
2006 – 11th World Cup, Mönchengladbach (1st place)
2007 – European Nations Cup, Manchester (4th place)
2007 – Champions Trophy, Kuala Lumpur (1st place)
2008 – Summer Olympics, Beijing (1st place)
2012 – Summer Olympics, London (1st place).