Callum has written many one-act and two-act plays that have been performed all over the world including: The Little Mermaid (Riverside Studios); Cinderella: The Anti Panto (Leicester Square Theatre); A Life in Monochrome (Space Arts Centre); Dracula (Immersive, Preston Manor); Aesthetics (Bath Fringe); Into Thin Air (2015 Space Arts Centre, 2016 Hounslow Arts Centre); How Soon Is Now (Bath Fringe); Drive Thru Eucharist (Bath Fringe); Sherlock and Watson: The Hounds of the Norwoods (Crystal Palace Festival); A Silent Mouth (Lunchbox Theatre); Coffee and John (Downstage Theatre, USA). 

Musicals include First Spirit (Foshan Grand Theatre, Guangdong, China): Living Out Loud Fujian Grand Theatre, Fuqing, China); Lessons Learned (National Theatre of China, Beijing, China); Into Thin Air: The DB Cooper Musical (debuting at The Turbine Theatre) and Rocky Roads (with Steeleye Span’s Julian Littman).

Callum has also worked as a comedy writer for Canal Cafe's award-winning NewsRevue and worked as script editor for Connie Wookey's Edinburgh comedy show: Denied. Callum recently completed the pilot for original sit-com, Actively Seeking Employment. 


Callum has written the score for four musicals and worked on music for several productions including Figures by Steven Dykes (MD); Badger (Composer/MD); Alma (Composer/MD); The Fir Tree (Composer/MD); The Little Match Girl (MD) NewsRevue (MD); The Little Mermaid (Composer/Musical Supervisor) Tinderella (MD) Macbeth (Composer) Oliver! (assist. MD), Return to the Forbidden Planet (cover MD) One Man Two Guvnors (Co-MD), A Life in Monochrome (co-MD).