Mark is a member of the Board of Directors of LEWC Global Solutions and USGA Executive Committee Member. He has been a member of the USGA Rules of Golf Committee for five years and a member of the USGA and the R&A Joint Rules of Golf Committee for three years. Mark has been a rules official in 17 professional major championships including each of the last five Masters tournaments and U.S. Open Championships; rules official for five U.S. Amateur Championships and two Walker Cups. Mark has taught 1 PGA/USGA Rules of Golf Workshops since 2016.