He made his American debut in January 2006 by defeating Adele Olakanye by decision on the undercard of Arturo Gatti's destruction of Thomas Damgaard at the Boardwalk Hall in Atlantic City, NJ.

Wach won seven fights that year, including five in America which was highlighted by winning the Polish International heavyweight title by a ninth-round knockout of Arthur Cook in Illinois.

In April 2009 in Jaroslaw, Poland Wach blasted out his American opponent Julius Long and defended his title of the World Champion in TWBA.

In 2010, after being sidelined for a year due to injury, Wach returned to the ring in great shape and turned in one of his best performances as a professional, knocking out Christian Hammer in six rounds in Germany.

Wach was quicker and sharper, and with one right cross, knocked McBride out cold in the fourth round winning the WBC International heavyweight title.

Wach returned to the Mohegan Sun Arena just four months later with another statement-making performance, this time knocking out Jason Gavern in six rounds at the "November Reign" event.

The event took place at the Resorts Hotel & Casino in Atlantic City, New Jersey, and got coverage form ESPN's Friday Night Fights.

He admitted to doping in the bout against Klitschko and got sanctioned by the Federation of German Professional Boxing, but said that he plans to continue his career no matter how harsh the penalties are.

In a fight held without fans in attendance because of COVID restrictions, Wach managed to outpoint Johnson to a unanimous decision victory.

[24] Wach challenged Moses Itauma for the WBO Intercontinental heavyweight title at The O2 Arena in London on 27 July 2024 but lost via second-round stoppage.