Quinlan, 66, of Stony Brook, is running on the Democratic, Conservative and Independence party lines. He is the principal law clerk to Suffolk Chief Administrative Judge C. Randall Hinrichs and a former Brookhaven and Islip Town attorney. He became the Brookhaven Town attorney in January 2010 and left the position in 2013. Before that, Quinlan was the Islip Town attorney, a position he held from March 2008 to January 2010. He was appointed the Brookhaven Town attorney in January 2006 while serving as the president of the Suffolk County Bar Association. He left the town attorney position in January 2008 when he was hired as Islip's assistant town attorney before becoming the town attorney. Quinlan was a partner in the law firm of Long, Tuminello, Besso, Seligman, Quinlan and Werner in Bay Shore from 1982 to 2006. Quinlan served as the administrator of the Assigned Counsel Defender Plan of Suffolk County from 1983 to 2006. He was the Brookhaven Town Democratic Party leader in 1995. He graduated from Virginia Military Institute in 1970 and served from 1970 to 1976 in the U.S. Army Reserves in the Military Police Corps. He earned a law degree from Villanova University Law School in 1973 and was admitted to the state bar in 1974. He began his legal career with the Legal Aid Society of Suffolk County. He is a member of the New York State Bar Association and the Suffolk County Bar Association.