He is currently the Technical Director of Engineering and Legislative Inspection Company wherein he is responsible for the statutory inspection and consultancy services.

During his career life, Mr. Stonehill was the owner and Senior Consultant of Stonehill Materials Services wherein he provided materials and inspection services to chemical handling companies around the world . He provided materials advice and service to Laporte Industries , Baker Petrolite , NIPA Labs , Exide Batteries , Robinson Brothers Ltd , Cleanaway Ltd , Chemical Specialities Inc , Soderec International , Alumina Chemicals , Solvay Interox , Hays Chemicals , UK Government Health & Safety Executive (HSE) . He even developed and sold corrosion related software and produced a review document on thermoplastic storage tanks for the UK Government . He also became the Managing Director of Jofin Company Ltd .

Mr. Stonehill was the Materials Technology Manager of the Laprote Industries Ltd. in the UK . During that period, he recommended appropriate materials of construction for process plants , performed laboratory and plant corrosion trials and monitoring , inspected plant using non-destructive techniques , drafted inspection schemes for sites, investigated material failures , presented evidence to an international committee preparing a code of practice on storage of hydrofluoric acid, investigated corrosion inhibitor formulations for water treatment and disinfection products, and developed and marketed a novel, Corrosion Resistant Coating . He was also able to work to different companies such as the British Steel Corporation , Trelleborg Gummifabriken in Sweden and Admiralty Engineering Laboratory . He was involved with the research in the solidification of continuous casting fluxes , investigated particle size analysis of rubber powders , analyzed metals , and operated test rigs to evaluate corrosion inhibitors for diesel engine coolants .

Mr. Stonehill has a Masters degree in Corrosion Science and a Bachelors degree in Metallurgy from the University of Surrey, UK.