He has established a flourishing career in opera, concert and recital. His performances in Bach’s Passions have gained particular notice throughout the world.

In the opera house he has worked with directors Peter Brook, Katie Mitchell, Mark Morris and Deborah Warner. Recent work includes the leading role in Harrison Birtwistle’s new opera The Corridor with performances at the 2009 Aldeburgh and Bregenz Festivals, as well as the Southbank Centre in London; Tom Rakewell in Stravinsky The Rake’s Progress at La Monnaie Brussels; Handel Jephtha at WNO and ENO and the Evangelist in a staging of St Matthew Passion at Glyndebourne. He also played Peter Quint in an acclaimed BBC TV production of Turn of the Screw and recorded the title role in La Clemenza di Tito with René Jacobs for Harmonia Mundi. Future plans include Captain Vere in Britten's Billy Budd for Glyndebourne Festival Opera.

In concert he has performed with many of the world’s leading orchestras including the Munich Radio, Berlin, Vienna, New York and London Philharmonic Orchestras, the Royal Concertgebouw Orchestra, Boston and London Symphony Orchestras and the Philharmonia. He makes regular appearances with the OAE with whom he has conceived projects exploring both Bach St John and St Matthew Passions.

Mark has given recitals in Amsterdam, Barcelona, Brussels, Madrid, Milan, Moscow, New York, Paris and Vienna. He appears frequently at Wigmore Hall in London where he first sang all three Schubert song cycles in May 2008, was their Artist in Residence in the 2009/10 Season and in 2011-2012 repeated the cycles there with Paul Lewis. He also recently sang the cycles at the Theatre an der Wien and at Salle Gaveau in Paris with Till Fellner. Composers who have written for him have included Mark-Anthony Turnage, Alec Roth, Sally Beamish, Thomas Larcher and Huw Watkins. As well as his regular collaborators Julius Drake, Roger Vignoles, Simon Lepper and Andrew West, he works with many internationally renowned chamber musicians including Imogen Cooper and Christian Zacharias.

He has made many recordings including the Bach passions with Herreweghe and McCreesh, Bach cantatas with Eliot Gardiner and Herreweghe, Haydn masses with Richard Hickox, Don Giovanni with Daniel Harding and operas by Rameau and Charpentier with William Christie. A disc of Handel arias As Steals the Morn with The English Concert and Andrew Manze, released by Harmonia Mundi, won the BBC Music Magazine Vocal Award in April 2008. Other recent releases include Haydn Creation for Deutsche Grammophon; Messiah with Colin Davis and the LSO; Britten Winter Words with Roger Vignoles and Schubert Die Schöne Müllerin and Winterreise with Paul Lewis, as part of a three cycle series for Harmonia Mundi. The latter has won the Gramophone magazine Vocal Solo Award for 2010.