Bruce also holds a doctorate in Immunopathology from the University of Chicago. He was a lab researcher at the National Institutes of Health for a decade and then continued his research in Immunology, and Immunogenetics at the FDA for a second decade. He then moved mainly into Clinical Research and served first as the Director of Clinical studies at Hybritech, Inc. and later as Clinical V.P at Viagene, Inc. both Biotech companies in San Diego, California.