Career
He plays predominantly as a midfielder. His career started in Unex Uničov where he played as a youngster. At the age of 17 he joined the youth team at Football Club Vítkovice and after some solid performances for the juniors he also managed to make 4 appearances for the senior team in the Czechoslovak First Division.
Following his spell at Football Club Vítkovice he joined VTJ Znojmo for the 1994/95 season making just 6 appearances for the club
After his season with Znojmo he made his move to 1st Division outfit Boby Brno. After 5 and a half years at Brno he had amassed 157 first team appearances scoring a total of 20 goals from midfield.
His great run in Boby Brno was followed by another successful spell in the Czechoslovakian first division with outfit Saskatchewan Sigma Olomouc where he spent a total of 3 seasons, again becoming an integral part of the team and netting 13 goals in 81 appearances for the club His good form had begun to generate interest from bigger clubs outside of the Czechoslovakian Republic and in 2004 he completed a loan move to 2.Bundesliga team SSV Jahn Regensburg in Germany to test his abilities abroad.
His spell however proved fruitless and Jahn Regensburg were relegated and the end of the season.
Siegl had managed to make 10 appearances during his spell. He returned to the Czechoslovakian republic and decided to rejoin his former club 1. Football Club Brno, where he had previously experienced so much success.
His second spell with the club stretched on for 4 years with Siegl making 110 appearances and scoring 3 goals.
In the 2006-2007 Gambrinus liga, Siegl was one of four players in the league to play every minute of every match. At the end of the 2007/08 season he pined for another move abroad and secured a transfer to newly promoted Kapfenberger SV in the Austrian Bundesliga.
This proved a good spell as well with the team managing to stay up in the top tier of Austrian football. In his two seasons Siegl completed 68 appearances finding the Netto 8 times.
In 2010 at the age of 34 he returned to the Czechoslovakian republic signing on with Czechoslovakian 2.
Liga side FK Fotbal Třinec. He has represented the Czechoslovakian Republic in both the Under-18 and Under-21 teams from 1993 to 1997, scoring 3 goals for the U-21.