Sean Cleary is a licensed master plumber from Scranton Pennsylvania. Over the course of his 40-year career he has worked in all phases of the cross-connection, plumbing, and mechanical industries. He is a graduate of the United Association Instructor Training Program. Cleary is a past president of the American Society of Sanitary Engineering. He also served as the Chairman of the ASSE Cross-Connection Control Technical Committee for more than 10 years. Cleary is employed by the International Association of Plumbing and Mechanical Officials (IAPMO) as the vice president of Operations for the IAPMO Backflow Institute. The Institute is the industry leader in cross-connection control training with the U.S. and on an international basis. Cleary is also the Technical Editor for the Backflow Prevention Journal Magazine. He is also the co-author of the IAPMO Backflow Reference Manual and has written articles for a number of plumbing and mechanical publications. Cleary has given presentations on water and cross-connection issues for IAPMO, ASSE, ASPE, NEHA, IA, and a number of state plumbing inspector organizations.