Having started off in the pro game in June 2006 and having built a perfect unbeaten record of 11-0-0, Wille (age 33) now looks to move into the later stages of his career and step up against some of the top prospects in the division. He started his best winning streak on June 2006 however, this came to an end on October 2008. In this period he won a total of 11 fights.
Wille proved he was made for the pro ranks in his debut against Lars Kayser, becoming the first person in Kayser's 0 fights to stop him. The fight ended in round 2 of 4. Wille's win streak continued to amass with 6 wins against fighters such as Mike Wohlert, Petr Jasukievic and Lars Kayser.
Wille then went on to fight and beat Abdul Moti on December 14th, 2007 maintaining his unbeaten record. Abdul Moti was Wille's next opponent of his career in 2007. The fight was scheduled for 10 and Wille was the 2nd person to go the distance with Moti.
Wille then went on to fight and beat Rashad Karimov on March 29th, 2008 maintaining his unbeaten record. Continuing his career, Wille fought Rashad Karimov in 2008 over 8 rounds. Wille was the 2nd person to go the distance with Rashad Karimov.
Sebastian Wille went into his latest fight with Steve Kroekel on October 3rd, 2008 with 10 wins and he continued this winning streak taking it to 11 wins. Wille became only the 4th person to defeat Steve Kroekel in his 10 long fight career, taking his win tally to 11 via the judges decision (UD, round 10).