From 2005 until retiring from international football in 2023, she was a member of the Canadian national team, with whom she won an Olympic gold medal in 2020 and bronze in both 2012 and 2016.

Schmidt was fourth in the West Coast Conference in total points (21), sixth in goals and third in assists.

[4] Schmidt played for the Vancouver Whitecaps from 2005 to 2006, alongside former Pilots Christine Sinclair and Tiffeny Milbrett.

[11] During the 2020 NWSL Challenge Cup Final, she would score a penalty, helping the Dash defeat the Chicago Red Stars for the club's first major trophy.

She subsequently started all four Olympic matches at Beijing 2008, and played at the 2011 FIFA Women's World Cup.

[14] On 28 February 2012, Schmidt made her 30th consecutive international appearance in a match against Scotland in Cyprus and had her first two-goal game.

[21] Named to the Canadian squad for the fifth time, Schmidt was used as a substitute in Canada's first two group stage matches, playing a crucial role in victory over Ireland after setting up Adriana Leon's game-winning goal.

[22][23] Following Canada's group stage exit from the 2023 World Cup, Schmidt initially followed through on her planned international retirement.

[24] However, once longtime teammate Christine Sinclair announced her own impending retirement for year's end, Schmidt was persuaded to return one final time for the second of two scheduled matches against Australia to be played in both women's home province of British Columbia.

[26] On December 5, 2023, Schmidt made her final international appearance, a 1–0 victory in a friendly match against Australia held at BC Place in Vancouver, entering as a second-half substitute for Sinclair.