In the UK, Mathieson became an orchestral librarian with the
Philharmonia Orchestra in 2010, while she continued to study conducting privately. With the Philharmonia, she was a conducting assistant to
Christoph Von Dohnányi and
Esa-Pekka Salonen. She has been an assistant conductor to
Marin Alsop in projects with the São Paulo Symphony Orchestra in Paris and Berlin,
Orchestra of the Age of Enlightenment and the
BBC’s
Last Night of the Proms. In 2013, Mathieson became founding artistic director of the Horizont Musik-Kollektiv (Berlin). For 2014-2015, she was a Leverhulme Fellow in conducting at the
Royal Conservatoire of Scotland (RCS), mentored by
Garry Walker, and assistant to
Donald Runnicles at the
BBC Scottish Symphony Orchestra. Mathieson has served as associate conductor of Opera Holland Park. In 2015, Mathieson became Resident Conductor of the National Youth Orchestra of Scotland Junior Orchestra. Between 2015 and 2017, Mathieson was Vocal Director and Lecturer in Performance at Goldsmiths, University of London. From 2016 to 2018, Mathieson was assistant conductor of the
Royal Scottish National Orchestra. In 2018, Mathieson was named co-artistic director of the Nevis Ensemble, alongside Jon Hargreaves, her husband. With the
Royal Liverpool Philharmonic Orchestra and Isata Kanneh-Mason, Mathieson has recorded music of
Clara Schumann commercially for Decca Classics. In 2018, Mathieson first guest-conducted
Symphony Nova Scotia, as one of two finalist candidates for the post of music director with the orchestra. She returned in November 2019 for a further guest-conducting engagement. In December 2019, Symphony Nova Scotia announced the appointment of Mathieson as its next music director, effective January 2020, with an initial contract of 3 years. This appointment marks her first orchestral music directorship. Mathieson is the first female conductor to be named music director of Symphony Nova Scotia. Mathieson is scheduled to step down from her music director position at the end of the 2024-2025 season. Mathieson and Hargreaves reside in Glasgow. ==Awards==