After Mr. Mandio served as a paratrooper with the 517 Parachute Infantry Regiment of the 82nd Airborne Division in the European theater in World War II, he obtained his law degree from Temple University School of Law in 1951.  Thereafter he joined the law firm of Eastburn, Begley & Fullam which eventually became the firm known as Begely, Carlin & Mandio, LLP.  Mr. Mandio was honored in 2001 by the Bucks County Bar Association for being a Distinguished Member of the Bucks County Bar Association for 50 years.

In the course of more than 50 years as an attorney in Bucks County, Mr. Mandio has handled a wide variety of legal matters which include estate planning, wills, trusts, school law, including serving as Solicitor for the Bristol Borough School District for more than 48 years, bank work, including serving as long time Solicitor for First Federal Savings and Loan Association, real estate settlements and development work.