Cassidy served from 2006 to 2011 on the National Advisory Council (NAC) of the U.S. Department of Homeland Security (Federal Emergency Management Agency) advocating for the nation’s emergency responders. He was appointed by President George W. Bush to a four-year term (January 2007 – December 2010) with the national Medal of Valor Review Board. Cassidy also served on the Scientific and Technical Advisory Committee for the &lt;a href="James%20L.%20Zadroga%209/11%20Health%20and%20Compensation%20Act"&gt;James L. Zadroga 9/11 Health and Compensation Act&lt;/a&gt; and as a member of the September 11th Worker Protection Task Force. In September 2008, Cassidy was appointed to the International Association of Fire Fighters (IAFF) Hazardous Materials and Weapons of Mass Destruction (Hazmat/) Advisory board.