Mark has co-authored reports including Improving Stormwater Management in the NYC Subway; Planning for Affordability in Connecticut; and Making Room at the Table: Increasing Civic Participation in Land Use Decision Making, which was recognized with the Connecticut Foundation for Open Government’s Pearlman Award in 2025.

From 2019 to 2022, while working for the Regional Plan Association, he provided communications backbone support for the Fairfield County Center for Housing Opportunity, an initiative which earned the U.S. Housing & Urban Development Department Secretary's Award for Public-Philanthropic Partnerships in 2023.

From 2016 to 2019, Mark worked for Empire State Development, New York State’s economic development agency. He traveled the length and breadth of the state supporting the iconic I Love New York tourism brand, and working to expand access to high-speed broadband in rural areas.

As a content strategist, Mark has managed multiple website redesigns and contributed to multiple rebrands, including the 2023 rebrand of multinational infrastructure firm AtkinsRéalis, where he worked as an Internal Communications Advisor for the U.S. and Latin America. 

As a writer, Mark focuses on urbanism in the New York metro region. His comments on housing, transportation, and climate resilience have appeared in Spectrum NY 1, CT Public, CT Insider, and Epicenter NYC, while his writing has appeared in Planetizen.

In 2024, Mark founded McNulty Creative, LLC to provide content strategy to clients in the infrastructure and public policy space. When not working on civic issues, Mark DJs, having performed in more than 10 states.