Mark Catlin is the former Occupational Health and Safety Director (retired) for the Service Employees International Union (SEIU), representing two million healthcare, service and public workers in the United States and Canada. An industrial hygienist and health and safety activist, since 1981, he has been involved with asbestos issues over his entire career, from investigating asbestos problems at worksites, schools and homes to conducting EPA and OSHA asbestos training for thousands of workers and managers. Mark has advocated for strong public policies to eliminate asbestos use and exposure. In the early 1990s, he was the clinic industrial hygienist for the Harborview Occupational Medicine Clinic at the University of Washington and conducted many occupational histories for workers with asbestos-related disease. Mark is honored to serve on the ADAO Prevention Advisory Board.