Founding Director (retired) of the Food Allergy Research and Resource Program (FARRP), and Professor Emeritus with the Department of Food Science and Technology, University of Nebraska (US).

His research interests involve food allergies and allergy-like illnesses including the development, evaluation, and improvement of immunochemical methods for the detection of allergens and allergenic foods; the determination of threshold doses for allergenic foods and implementation of risk assessment approaches for allergenic foods; and the effect of food processing on food allergens.