Mark is a 20-year veteran of law enforcement with specialized investigatory experience in the NYPD and Federal Law Enforcement. More than 20 years of experience in the U.S. Army, U.S. Army Reserve, and New York Army National Guard.

He currently serves as the Director of Rockland County Joseph P. Dwyer Veteran Peer Support Program. The Dwyer Program is a non-clinical, Veteran peer-to-peer mentoring program with numerous locations across New York State. At risk Veterans are served through outreach, scheduled weekly walks, monthly lunch meetings, book clubs and other recreational activities designed to build relationships between veterans and their families, with a focus on mental health and suicide prevention.

Mark served with the US Army during the Iraq War in Tal Afar, Nineveh Governorate. A U.S. Army Major, imbedded and served as the primary advisor to the Mayor of Tal Afar, Iraq (pop. 200,000) during operation Iraqi Freedom. As the commander of a Civil Affairs Team, developed governance and oversaw the implementation of over 20 million dollars in infrastructure projects to include, schools, medical facilities, water wells, pipelines, utility stations, a public library as well as others.