Douglas So is the Founder and Director of F11 Foto Museum, which is housed in a heritage building in Hong Kong. Since its establishment in 2014, F11 has organised a number of exhibitions featuring photographers including Robert Capa, Elliott Erwitt, Werner Bischof, Bruno Barbey, Paolo Pellegrin and Sergey Ponomarev. F11 also collects and exhibits cameras and photo books. In 2017, Douglas started f22 photo space for contemporary photography.
Douglas is a solicitor of Hong Kong, as well as England and Wales. Amongst his various roles, he is currently a Vice-President and Pro-Vice-Chancellor of The University of Hong Kong and the Secretary of UNICEF HK.