After a public career that spanned 39 years, McClintock accepted a full pension from the Government Retirement System in June 2013. He was recruited by the Interamerican University of Puerto Rico to teach American Government and Government Management courses and a Legislative Procedure seminar at its Metro campus in San Juan. He worked for Politank*, a Puerto Rico-based bipartisan government affairs firm from 2013 to 2017 as its Senior Public Policy Advisor and was frequently asked to speak at legislative hearings, public ceremonies or in the media. From January 2017 to April 2018, he served as the senior advisor to Senate President Thomas Rivera Schatz before returning to the private sector.