Bertie studies with Sian Edwards at the Royal Academy of Music where he is the Sir Henry Wood Scholar and winner of the prestigious Ernest Read Prize. He is the conductor of the London Young Sinfonia, the Percival Ensemble, and musical director of Waterperry Opera Festival. Other groups he has worked with include the WDR Sinfonieorchester, the Gürzenich-Orchester, the Britten Sinfonia, the London Sinfonietta, Shadwell Opera, the Royal Academy of Music Symphony Orchestra, the Salomon Orchestra, the City of Southampton Symphony Orchestra, and the National Youth Orchestra of Great Britain. Bertie has assisted conductors including Sir Mark Elder, Edward Gardner, and Jac van Steen, and has participated in masterclasses with Martyn Brabbins, Pierre-André Valade, Peter Stark, Nicholas Cleobury, Harald Jers, and others. In 2017 he participated in the final rounds of the Deutscher Dirigentenpreis.
Bertie’s repertoire spans renaissance and baroque music to twentieth- and twenty-first-century works and his own compositions. Equally at home with opera he has recently conducted productions of Mozart's Cosi fan tutte and the world premiere of Peter Learn's Nero Monologues. He has taken part in masterclasses with artists such as Martyn Brabbins, Christophe Rousset, and Pierre-André Valade.
Bertie frequently conducts the choir of St Marylebone Parish Church, London (where he is organ scholar), and is much in demand as a conductor of other choirs and choral societies.
Forthcoming engagements include Stravinsky's The Firebird at the Royal Academy, and Mozart's Don Giovanni at the Waterperry Opera Festival.