She served as Canada's captain in a gold-medal winning effort at the 2014 4 Nations Cup in Kamloops, British Columbia.

Irwin was part of the gold medal winning Ontario Red squad at the January 2005 National Women's Under-18 Championship in Salmon Arm, B.C.

She also made appearances with the Aeros senior team in the 2005–06 and 2006–07 seasons in the National Women's Hockey League.

She won a bronze medal with Team Ontario 1 at the 2007 Esso Women's Nationals in Salmon Arm, BC.

Other accomplishments include winning a gold medal with Team Ontario at the 2005 Esso Women's Nationals in Sarnia, ON.

At the January 2005 National Women's Under-18 Championship in Salmon Arm, BC, she won a gold medal with Team Ontario Red.

At UMD, Irwin benefitted from two Olympic hockey players who were assistant coaches: Canada's Caroline Ouellette and Team USA's Julie Chu.

During a second season at UMD, Irwin scored 22 goals and 44 points in 39 games as the Bulldogs advanced to another NCAA Frozen Four tournament.

[5] On September 7, 2011, it was announced that Irwin was appointed one of two team captains for the 2011–12 Minnesota Duluth Bulldogs women's ice hockey season.

At the 2009 IIHF Women's World Ice Hockey Championships, she had two goals and three assists in five games for Canada in its silver medal performance.

On July 29, 2019, Irwin was hired to serve on Lisa Haley's coaching staff with the Ryerson Rams women's ice hockey program.