Mark McGreevy OBE joined Depaul in 1990 as one of the first employees of the charity which began its work in London, working with young people sleeping rough on the streets. In 1992 he became CEO of Depaul UK, and over the next 10 years it quickly expanded into a national charity and then extended its reach by establishing a subsidiary in Ireland, at the invitation of the Irish government. 

Depaul International was established in 2004, with Mark moving into the Group CEO role, overseeing the charity’s growth into more European countries and across to the USA. Depaul’s services provide help for over 100,000 homeless and vulnerable people of all ages each year. Mark is now the President of the Depaul Group.

In 2014 Mark was one of the founders of the Institute of Global Homelessness based in Chicago, a joint partnership between DePaul University and Depaul International specialising in global advocacy (UN) and sharing best practice across countries.  

In 2017 he agreed to coordinate the work of the Famvin Homeless Alliance, which has subsequently housed over 10000 people in 76 countries across the world.