Steve has had a long involvement in food safety research and the development of regulatory food control systems and standards, initially as Director of Programme Development in the New Zealand Food Safety Authority, through to his current position as the Director of Science and Risk Assessment in the Ministry of Primary Industries. He has more than 250 publications in science journals and conference proceedings.

Steve has had extensive involvement with standards agencies, as a government representative and as a consultant, in their development of food safety risk analysis and the setting of international standards and guidelines. He is chairman of the Codex Committee on Milk and Milk Products which sets the standards for milk and milk products in international trade. He is a member of the OIE Animal Production and Food Safety Working Group which co-ordinates and informs international work on food-borne zoonoses. He is a member of several international advisory groups e.g. the Hong Kong Government Advisory Committee on Food Safety.

Steve is an Adjunct Professor of Food Safety at Massey University. He participates in a number of food safety groups on behalf of government e.g. Chairman of the MPI Technical Advisory Committee on DCD.