After speaking on a panel at the UN opening of the World Press Photo Exhibition in New York in August 2012, Sullivan initiated the creation of A Day Without News to focus attention on, and take steps to address, the targeting of journalists in armed conflict. The campaign launched in February 2013 with the support of renowned members of the media community, including CNN's chief international correspondent, Christiane Amanpour, and several photographers who have spent time on the front line in conflict zones, such as Don McCullin, Tom Stoddart and Lynsey Addario.
Following the death of Ian Parry, a photographer and close friend who died during the Romanian Revolution while on assignment for The Sunday Times, Sullivan created a scholarship in his honor to encourage aspiring young photojournalists. The scholarship is a registered charity and offers a bursary for aspiring young photojournalists. It is widely recognized as one of the most important awards available for aspiring photojournalists. In 2004, he produced a book EYES WIDE OPEN, a collection of work from the winners of the award. Currently, Sullivan is the vice president of photo assignment at Getty Images.