He specialises in the contamination of Jet Fuels and Bunker Fuels.
- Chemist Consultant with Associated Petroleum Consultant Ltd
- Independent Consultant for T. J. Gunner and Sons Ltd
- Director and then Managing Director of T. J. Gunner employed as a Chemist Surveyor and Consultant
- Employed by Caleb Brett as a Laboratory Manager (Houston)
- Employed by Caleb Brett as a Laboratory Chemist (Aberdeen)