Xavier has worked in lead roles on stage in the United Kingdom for 20 years. Notable productions in which he has appeared include Miss Saigon, My Fair Lady, The Phantom of the Opera, Oklahoma!, and The Sound of Music. In 2014, he played Sid Sorokin opposite Joanna Riding in The Pajama Game at the Shaftesbury Theatre in London.
Xavier's film work includes his portrayal of Tom in the 2014 production Never Let Go with director Howard J Ford for Latitude Films, scheduled for release in 2015. In 2013, he appeared as Rob in the short film Gnomeland by writer/director Francesca Jaynes, as well as playing a Russian Gulag Prisoner in Walt Disney Pictures' Muppets Most Wanted, filmed at Pinewood Studios.