In 2017, McCormack served as a Producer and Actress on several productions. In February of that year, she joined the cast of the Syfy science fiction television series Killjoys in its third season. On the series, she portrays Zeph, an androgynous scientist. That summer, the CBC mockumentary, The Neddeaus of Duquesne Island, which McCormack both produced and starred in, was released online via CBC's official website. In November 2017, she joined the cast for the third season of the CraveTV series Letterkenny. Also in 2017, McCormack developed and performed in Charlotte: A Tri-Coloured Play With Music, an original opera based on the life of German Painter Charlotte Salomon, which ran at the 2017 Luminato Festival in Toronto and at the World Stage Design Festival in Taipei.