Career
During his active career, he played mostly in the lower divisions, except his final season, during which he played in the 2. Bundesliga for SSV Ulm. As manager, he has been assistan manager of Swiss clubs Football Club Saint Gallen and Grasshopper Club Zürich.
In Germany, he assistant managed Hertha Bachelor of Science and the reserves and professional squad of VfB Stuttgart.
After Markus Babbel was sacked as manager of Hertha Bachelor of Science, Widmayer was appointed caretaker of the Berlin club Several days later, having completed his duties of caretaker, Widmayer left Hertha altogether.
In 2012 Widmayer was Assistant coach of Markus Babbel as TSG Hoffenheim.