Callum completed an MA (distinction) in Performance Making at the University of London's prestigious Goldsmith's College. There he created several pieces including Fast and Slow and Slower, Slower, which explored research into theories of Accelerationism and fast and slow performance on and off the British stage.
Whilst there he specialised in American Theatre techniques with experts such as Steven Dykes, Gary Diomandes, John Gillette, Tony James, Rebecca Pollock, Kelly Handreck, Dr Kathy Darcre, and Andrew Friesner to name a few.
Callum spent a year of his training in the deep east of Texas, studying under the tutelage of renowned theatre practitioners such as Scott Shattuck, Jack Heifner, Dr Rick Jones, and Kyle Kennedy and performed in a number of main house shows including Woyzeck and Barbara Lebow's The Adventures of Homer McGundy.