In the following 2009–10 season as a sophomore, Wiercioch continued his positive development in recording 27 points in 39 games, being named to the First All-Star Team, and earning All-American honours.

[citation needed] Wiercioch signalled the completion of his athletic collegiate career in agreeing to a three-year, entry-level contract with the Ottawa Senators on April 2, 2010.

Wiercioch played in four seasons with Ottawa before his tenure ended when the Senators chose not to give him a qualifying offer, making him a free agent.

In appearing in a career best 57 games, Wiercioch was unable to provide a stability to the blueline serving in a rotational scratch role to end the season with the cellar-dwelling Avalanche.

[11] As a free agent from the Canucks, and with limited interest in continuing in the AHL, Wiercioch embarked on a career abroad, agreeing to a one-year contract with Belarusian club, HC Dinamo Minsk of the Kontinental Hockey League (KHL) on July 9, 2018.

Un-signed leading into the 2019–20 season, Wiercioch signed as a free agent to continue his European career with Italian club, HC Bolzano of the Austrian Hockey League (EBEL), on December 11, 2019.

[13] Following a lone season with Bolzano, Wiercioch moved to Sweden in helping Timrå IK gain promotion from the HockeyAllsvenskan to the Swedish Hockey League.

Failing to initially make the squad he was again invited the following season to selection camp for the 2010 World Junior Championships, however was unable to participate due to injury.