Career
Since retiring from playing he has entered coaching. Weiser began his professional career with 1. Football Club Köln whom he had joined aged 13.
After making 110 appearances for 1.
Football Club Köln over six seasons, he departed for France in July 1997, joining Rennes. He was a mainstay of their starting XI during his first Ligue 1 campaign, but the arrival of Paul Le Guen as manager saw his appearances during the 1998-1999 season become more limited.
He returned to Germany to sign for VfL Wolfsburg and begin a six-year association with the club He played 159 league games for the club during this period, and also featured in several Union of European Football Associations Cup campaigns.
During this time he switched to playing more predominantly as a defender than as midfielder.
In August 2005 he returned to his former club 1. Football Club Köln, signing a two-year deal. He only made a handful of appearances for the club though during their campaign in the league, DFB Cup and Intertoto Cup.
After retiring from playing he became a coach at under 16 level for 1.
Football Club Köln in 2009, and later became assistant coach of the first team for the 2011-2012 season. In October 2012 he moved to the role of head coach at English club Wolverhampton Wanderers, where he reunited with Ståle Solbakken who he had previously been assistant to at 1.
Football Club Kölane However, Weiser was sacked along with Solbakken in January 2013.