After earning a Bachelor of Arts degree in Political Science and a Master of Arts degree in Public Administration from the University of Florida, McArthur spent eight years in Washington, D.C. as an analyst with the Federal Election Commission and six years in Tallahassee as publisher of the “Florida Monitor,” a non-partisan political newsletter. In 1989, he returned to Palm Beach County where he served as the senior aide to a County Commissioner and the Clerk of Court.
In 2004, McArthur accepted a position with the Port of Palm Beach as Director of Human Resources, which included governmental affairs and labor relations for the Port of Palm Beach. After six years with the Port of Palm Beach, he returned to county government at the request of County Commissioner Paulette Burdick to serve as her senior aide. An active supporter of the community, McArthur has served on the Port’s Board since January 2015.