She competed, along with some 2600 athletes, in the Kickboxing World Championship, organized jointly in 2004 by the WKA and IAKSA associations and held in Basel, Switzerland.

Under the training of the Polish-Austrian ex-Olympic boxer, Jerzy Kisiel, and under the tutelage of the Karlsruhe coach and promoter, Jürgen Lutz, who already helped advance the career Regina Halmichs when she began, she tried to gain a foothold in international professional circus so that her successes as an amateur can continue.

In her second fight on March 31 of the same year in Karlsruhe, Köhler drew against the German Kira Schnürer, who was undefeated to this date.

On 9 February 2008, she also lost on points against the strong Israeli Hagar Finer, WIBF title bearer at superfly and bantamweight.

Doris Köhler works as an association trainer with Kumgang Vienna and ASKÖ Penzing, where she teaches judo, taekwondo and kickboxing, and also gives personal training classes in these sports.