Leon earned his Bachelor of Science in Business Administration, with honors, and his law degree from the University of Florida in a total of four years. Before attending college, Leon was a Warrant Officer in the United States Maritime Service, with sea duty to Italy. He served the country overseas in Korea as a Sergeant in the Army and was the first Air Force Cadet Colonel in Florida R.O.T.C. history. At the end of his military career, Handley retired as Captain in the United States Air Force Reserve.
He is a Fellow of the American College of Trial Lawyers, The Florida Bar, American Board of Trial Advocates, Florida Defense Lawyers Association, International Association of Defense Counsel, Federation of Insurance and Corporate Counsel, American Judicature Society, and the American Bar Association.
Leon has been involved in a number of local community organizations, including serving as past President and Life Director of the Central Florida Fair, Chairman of the Board of Trustees of WMFE, Past Chairman of the Community Service Award Committee of Walt Disney World® and a Trustee of Lake Highland Preparatory School. He held positions with corporate affiliations include Past Chairman of the Board of Directors of Beneficial Savings Bank; Past President and Director of the Southern Industrial Savings Bank; Vice President and Director of Claude H. Wolfe, Inc.; President and Director of Cracker Groves of Florida, Inc., and President and Chairman of the Board of Mine and Mill Supply Co., Inc. of Lakeland.