John started his career in 1992 working as a research technician at the University of York, Chemistry Department where he provided technical support in analytical chemistry, polymer chemistry and surface analysis. In 1998 he was appointed research associate in the Physics Department investigating the optical effects of Giant Magneto Resistant (GMR) devices leading to the design and development of a Scanning Laser Microscope for GMR film mapping.

In 2000 he moved to the University of California as a Research Assistant developing Scanning Tunneling Microscopes for the study of nanoscale surface structures.

Two years later John moved back to the UK as a Principal Materials Scientist at BAE Systems InfraRed. There he took a key role in developing semi-conductor devices for InfraRed imaging, and computer models for semi-conductor optics.

In 2005 John joined Hawkins working in the Leeds office as an Associate. Having established himself in the field of fire investigation, he has also been involved in a broad range of forensic engineering investigations including road traffic accidents, mechanical vibration exposure, roller coasters and fairground equipment and semi-conductor engineering. John also has expertise in the areas of cryogenics, process engineering, vacuum engineering, optics and surface chemistry.