John O'Sullivan has extensive experience in the aviation industry, predominantly with CityJet since February 1996, where roles have included Technical Training, Line Maintenance Manager, Line Maintenance Controller, and Line Maintenance Engineer/Supervisor. Prior to CityJet, John O'Sullivan worked at Crossair from September 1987 to January 1996 as a Line Maintenance Engineer/Lead Mechanic. Earlier in their career, John O'Sullivan served as a Helicopter Technician with the Irish Aer Corps from September 1982 to September 1987. Educational background includes studies at Technological University Dublin.