John trained as a postgraduate conducting scholar at the Royal College of Music with Neil Thomson, George Hurst and Odaline de la Martinez, before studies with Diego Masson at the Dartington International Summer School. 

Currently Principal Conductor for Redhill Sinfonia (a post he has held since 2012), John has previously held posts with Slough Philharmonic Society and Southampton Youth Concert Sinfonia, and has conducted many other orchestras including Oxford University Orchestra, Oxford Chamber Orchestra, Colne Philharmonic Orchestra, Hertfordshire Philharmonia and Kew Sinfonia. 

Professional groups he has conducted include the Icelandic Symphony Orchestra, The Bristol Ensemble and Ensemble Eos Cymru, the latter for whom he has recorded works by Welsh composer, Christopher Weeks.