He played in two NHL games, one with the Philadelphia Flyers and the other with the New York Rangers before opting for a European career in playing for Leksands IF of the Swedish Allsvenskan, Lukko of the Finnish SM-liiga, and EC KAC and EC Red Bull Salzburg of the Austrian EBEL.

On July 2, 2010, Siklenka signed a one-year contract with the Atlanta Thrashers of the NHL.

He was unable to make the Thrashers opening night roster and was reassigned to American Hockey League affiliate, the Chicago Wolves, to start the 2010–11 season.

[1] 36 games with the Wolves, Siklenka sought a release from his contract and returned for a second spell with EC KAC of the EBEL on January 27, 2011.

This biographical article relating to a Canadian ice hockey defenceman born in the 1970s is a stub.