Mark is an assistant professor at the UP School of Urban and Regional Planning, where he teaches planning theory and practice, land use planning, planning workshop, project planning and development, the planning process, special problems in estate planning and development, planning law, and research methods in planning. Since 2016, he has advised and supervised graduate students doing coursework on planning research, land use planning, and development planning for various local government units. He has served as project leader and land use planner for the University of the Philippines Resilience Institute's spatial and comprehensive planning services provided to several local government units in the Philippines. Mark serves as the vice president and chief operating officer and general counsel of the Centre for Neighbourhood Studies, a nonprofit research and technology organisation that promotes smarter and more sustainable neighbourhoods, as part of his advocacy to advance neighbourhood science in the country.

Previously, he was assistant professor of public administration at the UP National College of Public Administration and Governance, where he also served as its residential program coordinator and later on as college secretary and director of the Center for Public Administration and Governance Education. He was an affiliate professor at the Faculty of Management and Development Studies of the University of the Philippines Open University and was a visiting professor at Mahasarakham University in Thailand (2012). He received a UNESCO Fellowship at the Weitz Centre for Sustainable Development in Rehovot, Israel, in 2017.

Mark advises national and local governments, civil society, and international development organisations on technical and legal issues. He currently serves as a project collaborator for two Asia-Pacific Network for Global Change Research (APN) projects: (1) Bridging academic researchers and vulnerable island communities in the Philippines: Enhancing capacities for climate and disaster risk management of low-income municipalities in Batanes, Philippines (CBA2024-01SY-Santiago) and (2) Unraveling urban resilience using City Preparedness Index: Scientific evaluation method for developing policy and action networks (CRRP2023-10MY-Uchiyama). He previously served as an in-country co-investigator for the Centre for Sustainable, Healthy, and Learning Cities and Neighbourhoods Philippines, which is part of an international consortium of nine research partners aiming to strengthen capacity to address urban, health, and education challenges in neighbourhoods throughout Africa and Asia's fast-growing cities. He likewise worked as a co-investigator on the UNESCO-IIEP and University of Glasgow-led Local Challenges, Global Imperatives: Cities at the Forefront of Achieving Education 2030 (Cities and Education 2030) research grant.

As a lawyer and a registered and licensed environmental planner, he specialises in legal geography and planning law. His professional practice encompasses a diverse field of environmental planning that includes land use legislation, policy, and administration; spatial and comprehensive development planning; real estate planning and development; smart cities and neighbourhoods; strategic foresight and futures thinking in local planning; and anticipatory governance and institutional capacity development planning. His primary research interests lie in the areas of the judiciary and the city; land use institutions, urban morphology, and spatial justice; the influences of law and jurisprudence in shaping the socio-spatial patterns of land use in urban areas; and strategic foresight, futures thinking, and anticipatory planning and governance.

Mark obtained his Bachelor of Arts (Public Administration), Postgraduate Diploma in Urban and Regional Planning, Master of Arts (Urban and Regional Planning), and Juris Doctor degrees from the University of the Philippines Diliman. He currently is a Doctor of Philosophy (Urban and Regional Planning) candidate at the UP School of Urban and Regional Planning.