His practice experience includes being the sole owner of a multi-specialty practice for twenty years in San Diego, California, an expert witness for more than twenty years, a published author of journal and magazine articles in the U.S. and internationally, and a speaker at dental conferences across the U.S.. Dr. Graskemper is the past director of professional responsibility and the past editor of the Post Graduate Literature Review Journal at Stony Brook School of Dental Medicine, where he is an associate clinical professor.