Stuart was a choral scholar at Christ Church, Oxford, studying Biological Sciences, before completing his training at the Royal Academy of Music in 2013 where he studied with Ryland Davies. In 2011, aged 25 and the youngest finalist, Stuart won second prize at the Wigmore Hall International Song Competition and as a keen recitalist, has appeared at Wigmore Hall, Kings Place and St John?s Smith Square, London and at Oxford's Holywell Room.
Stuart was a Jerwood Young Artist at Glyndebourne Festival Opera in 2013, singing in a new chamber opera based on Britten Canticles, conducted by Vladimir Jurowski, as well as Officer Ariadne auf Naxos and during the 2013/14 season, Stuart joined the Stuttgart Opera Studio and performed the title role in Gluck Orph?e et Eurydice, Don Ottavio Don Giovanni, Gastone La Traviata, Abdallo Nabucco and Second Priest Die Zauberfl?te and is currently a Classical Opera Associate Artist with whom he has recently sung Osroa in JC Bach Adriano in Siria and Don Ottavio Don Giovanni.
Plans this season and beyond include St John Passion on tour with the Orchestra of the 18th Century and Daniel Reuss, and with Vocal Consort Berlin in Koethen; Scipione Il Sogno di Scipione in a recording for the Classical Opera Company; Beethoven Choral Fantasy with BBC Scottish Symphony Orchestra and Thomas Dausgaard; Messiah with both the Hall? and Bournemouth Symphony Orchestras and Christian Curnyn; High Priest/ Abner/Amalekite/Doeg Saul at the Adelaide Festival; a recital programme of Britten and Vaughan Williams for Stuttgart Opera; Iro Il Ritorno d'Ulisse in Patria for The Royal Opera at the Roundhouse; Alcesta in Cavalli Erismena for Aix-en-Provence Festival in Aix as well as on tour and a return to Wigmore Hall for a Schubert recital with James Bailleau.
Stuart has sung Messiah on tour with the Gabrieli Consort and Paul McCreesh; Purcell Dido and Aeneas with Trevor Pinnock at Wigmore Hall; Purcell The Fairy Queen with RIAS Kammerchor, Berlin and Rinaldo Alessandrini; Jonathan in Handel Saul for Glyndebourne on Tour and Laurence Cummings, with whom he has also sung Handel L?Allegro, il Penseroso ed it Moderato at the London Handel Festival; Mozart Mass in C Minor with the Royal Northern Sinfonia; Bruckner Te Deum with Oper Stuttgart; Haydn Creation with the Ulster Orchestra; Bach St John Passion (arias and Evangelist) on a European tour with the OAE and Stephen Layton and a Bach programme, also with the OAE this time with John Butt, following which Michael Church wrote in The Independent: "...Stuart Jackson was the big discovery...the ethereal sweetness of his tone plus his accomplished artistry surely mark him out for a brilliant future."
For Royal Academy Opera he sang B?n?dict in Berlioz B?atrice et B?n?dict, First Armed Man Die Zauberfl?te and Count Errico in Haydn La Vera Costanza. Stuart was a Samling scholar, and a past recipient of the Sybil Tutton Award administered by the Musicians Benevolent Fund.