​​Mark Carew is a social psychologist by training. He is currently principal researcher at leading international disability charity Leonard Cheshire, where he leads on evidence generation across its research portfolio. Mark has co-authored several academic articles and books on global disability inclusion.

The Honorable Mark Dybul, MD, is the co-director of the Center for Global Health Practice and Impact, and professor in the Department of Medicine at Georgetown University Medical Center. He is also a chair and fellow with the Joep Lange Institute. A well-recognized global health expert and humanitarian, Dr. Dybul served as executive director of the Global Fund to Fight AIDS, Tuberculosis and Malaria, and as the U.S. Global AIDS Coordinator, overseeing the implementation of the U.S. President’s Emergency Plan for AIDS Relief.

Mark Freudenberger is a senior associate at Tetra Tech and newly appointed director of the land tenure and property rights sector. Freudenberger has spent most of his 30 year career overseas specializing in natural resource management and rural development in francophone West Africa and Madagascar. He holds a doctorate in regional and rural planning.

Mark Grabowsky is the COO of UNSEO. His career has spanned over 20 years career working in developing countries on child health, focusing on vaccine preventable diseases, HIV and malaria. While not thinking about integrating service delivery he sails and watch baseball, often at the same time.

Mark Halle is a senior fellow at the International Institute for Sustainable Development. He lectures, writes and publishes frequently on issues relating to sustainable development. He is based in Geneva.

At First Light, Mark conducts diligence on potential investments and supports invested enterprises. Mark has a background in community development, including two years of field work in Ecuador with Manna Project International. He received a bachelor's in international political economy from Vanderbilt University, and will attend Oxford's Said Business School in the fall of 2011.

Mark Horoszowski is the co-founder and CEO at MovingWorlds.org, a social enterprise addressing the global talent gap. Its matching site, support team, and training help people find the best place to volunteer their skills around the world — on their own, or through corporate-sponsored programs.

Mark Horoszowski is the co-founder and CEO of MovingWorlds.org, a platform that helps people volunteer their skills around the world, on their own or through corporate-sponsored programs. Its newly launched MovingWorlds Institute, accepting applications through November 30th, combines experteering, curriculum, mentorship, and networking to help people transition to social good careers.

Mark is the child protection adviser for Australian Volunteers International. Mark works to support AVI's overseas partner organizations to develop, improve and maintain their child protection policies and practices. Mark is a trained and registered educational psychologist and holds a Doctor of Educational Psychology from the University of Melbourne. Prior to joining AVI, he lived and worked in Cambodia for three years and Hungary for two years.