Glenn made his professional singing debut at the 25th Handel Festival in Karlsruhe, Germany, where he played Adelberto in Ottone, conducted by Charles Farncombe CBE. Since then he has played several lead Handel opera roles including Julius Caesar and Ruggiero in Alcina for the Handel Opera Society, Rinaldo at the Bloomsbury Theatre, London, Apollo in Parnasso in Festa and Tirinto in Imeneo with Baroque Encounter at St. John's, Smith Square in London.
Other opera roles have included Silvio in Handel's Il Pastor Fido, Cupid in John Blow's Venus and Adonis, Spirit in Purcell's Dido and Aeneas and Venus in a concert performance of Pepusch's Venus and Adonis. With Baroque Encounter he has also presented semi-staged performances of three of Handel's early dramatic cantatas, including Il duello amoroso and O come chiare e belle.
Glenn was a soloist for the modern-world premiere performance of the rediscovered Mozart orchestration of Handel's Judas Maccabaeus for John Pryce-Jones and the Halifax Choral Society, broadcast on BBC TV (UK) and on Trio Arts Channel (USA).
His other concerts have incorporated some of the main repertoire for counter tenor including Bach's St Matthew Passion, and Handel's Messiah with the Halifax Choral Society, and also with Choros and the Oxford Sinfonia, the first performance of a Bach passion (St John Passion) at Douai Abbey, Bach's Mass in B Minor in Cambridge, Purcell's Come ye sons of art away and Mozart's Coronation Mass for the Queen's Golden Jubilee at St. Alban's Cathedral and both Vivaldi's and Pergolesi's Stabat Mater. His performances have contributed to festivals around the UK including the Chelsea, Rye, Shipton, Wandsworth, Edinburgh Fringe and Pennine Spring festivals, lute songs at Hampton Court Palace, and arias for counter tenor, oboe and orchestra in London and Brighton.
In recital Glenn has performed at the National Portrait and Dulwich Picture galleries, the Handel House Museum and St John's, Smith Square, in London. He has performed in Germany, Hungary, Cyprus, Ireland, France and his native Australia. His repertoire extends well beyond the baroque and he has given recitals of Finzi's Let us garlands bring and Berlioz's Les nuits d’été and also sometimes stretched to cabaret under the pseudonym "Maestro Millenota - the songbird of Soho".
Glenn's plans include a mini-tour of Fragrant Flora recitals with
Baroque Encounter Trio next Spring, and a performance and workshop at the 2010
Dulwich Festival.