Simon Jermyn (born 1981) is an Irish jazz bassist, guitarist, electronics artist, and composer. Jermyn began his training in classical guitar before transitioning to jazz and earned a diploma in Jazz Studies from Dublin in 2000. He continued his education at the Guildhall School of Music and Drama in London and completed a Master’s in Jazz Performance at the Koninklijk Conservatorium Den Haag. Jermyn performed across genres including jazz, new improvisational music, noise, and singer-songwriter projects. He released the debut album Trot a Mouse (2009) and the solo record Hymn (2010). Jermyn’s recording career featured the collaborative albums Lean (2015) and Naked Allies (2019). He joined Charlotte Greve’s quartet Wood River, contributing to the album More Than I Can See (2019). Jermyn recorded with Ben Goldberg on the duo album Silence, and separately collaborated with Ryan Plotnick and Pete Robbins.