Mark is a recognized expert on criminal justice and addiction with over eight years of experience advocating for and implementing smart policies and practices in these areas.

Prior to joining Addiction Policy Forum, Mark served as Baltimore City’s Director of Opioid Overdose Prevention and Treatment, managing a high-profile overdose response cited as a model by President Barack Obama, U.S. Surgeon General Vivek Murthy, and U.S. Director of National Drug Control Policy Michael Botticelli. 

He was a Senior Criminal Justice Policy Associate and Acting Director of Communications in Legal Action Center's Washington, D.C. office where he advocated to reduce barriers for people with criminal records and expand access to substance use disorder treatment. He was a co-chair of the Reentry Working Group of the Justice Roundtable and has provided technical assistance to dozens of criminal justice agencies to implement health interventions that improve public safety and community wellbeing. 

He is a co-author of Legal Action Center's Roadmap for Promoting Health and Justice: A Smarter, More Effective National Drug and Alcohol Policy, and his writing has appeared in the Baltimore Sun, Huffington Post, Addiction Blog, and the National Institute on Drug Abuse blog. He has presented before the American Bar Association, U.S. Interagency Reentry Council, NASA, American Constitution Society, Poynter Institute, and many others. 

Mark is a certified Offender Employment Specialist and a graduate of Towson University and Georgetown University Law Center.