Mark is the Group Chief Executive of Depaul International, which oversees and co-ordinates the activities of a group of DePaul charities operating in the UK, Ireland, Slovakia, Ukraine, France, Croatia and the USA and providing services for over 22,000 homeless people per annum. Mark joined DePaul in February 1990 as one of the first employees of the charity and has been directly responsible for all of its growth to date. In addition to his work at DePaul International Mark is the founder of The Institute of Global Homelessness (IGH) in 2012 based in Chicago, which is a partnership between Depaul International and DePaul University. IGH is the first organization to focus on homelessness as a global phenomenon with an emphasis on those who are living on the street or in emergency shelters. The IGH staff and Advisory Committee work with a broad network of world-class advisors, experts, and organizations — balancing geographies, cultures, and skills. He is an Honorary Fellow of Leeds Trinity University.