Alexander has a broad repertoire and experience from buffo roles to leading men and to date has performed over 65 professional roles across a range of repertoire. Amongst others, he has been a soloist under the batons of Sir Georg Solti, Kent Negano, Simon Halsey, Sir Edward Downes, Sir David Wilcocks, Pier Giorgio Morandi, Edward Gardner, Noel Davies, Tobias Ringborg and Daniel Harding. Over the course of his career he has received consistent critical acclaim from the broadsheets and magazines: Opera Magazine hailed his professional debut in 2003 as Peter Quint in Britten’s Turn of the Screw as a “triumph”. Highlights include Don José for Malmö Opera, the Son/Tenor 1 in Weill’s Die Sieben Todsünden under David Radok at Göteborgs Operan, Armed Man / Priest in Die Zauberflöte under Daniel Harding at the Lucerne Festival, Switzerland; Don Ramiro under the baton of Pier Giorgio Morandi with the Finnish National Opera; Magnus Gabriele de la Gardie in Foroni’s Cristina Regina di Svezia at the Vadstena Opera Festival under Tobias Ringborg; Don Ramiro, La Cenerentola for Malmö Opera under Brad Cohen; His Count Danilo in Lehar’s The Merry Widow for Scottish Opera was described as “the Danilo of one’s dreams” (Opera Magazine). Other highlights include the roles of Le Nos, Pytor and Yarishkin in Le Nos (Shostakovich) at the Royal Opera House, London; Trio, Trouble In Tahiti (Bernstein) and Charlie, Mahagonny Songspiel (Weill) with John Fulljames; Pierrot, Der Kaiser von Atlantis (Ullmann) under Edward Gardner and the Hallé Orchestra and Lupo with the composer Hans Werner Henze as conductor on his children’s opera Pollicino. Other roles include Bajazet, Tamerlano; Hippolyte Hippolyte et Aricie (Lully) and Telemachus Il Ritorno d’UIisse in Patria (Monteverdi); Pedrillo Il Seraglio for Scottish Opera; Count von Zedlau Wiener Blut and Eisenstein, Die Fledermaus for Clonter Opera; Chinese Man The Fairy Queen (Purcell) for Armonico Touring Opera; Dottore The Jewel Box (Mozart) for Bampton Classical Opera; Fenton Die Lustigen Weiber von Windsor (Nicolai); Mercury Orpheus in the Underworld (Offenbach); Ben The Telephone (Menotti) for Ludlow Opera; Rapunzel’s Prince Into The Woods (Sondheim), Chekalinsky Pique Dame (Tchaikovsky), Oronte Alcina (Handel), Egisto L’Egisto and La Théière L’Enfant et les Sortilèges, Ravel.

In the musical theatre world, Alexander was offered the title role of Peter Pan at the Royal Festival Hall, London, and the role of Anthony Candolino in the Broadway transfer of ‘Masterclass’ with Cagney and Lacy star Tyne Daly as Callas at the Vaudeville Theatre, London.