Human Rights Watch. 2004: Victory, Angers, France. Images of the Aftermath of War in Iraq. 2006: The Human Face of Gun Violence, UN Secretariat, New York. A joint exhibition funded by IANSA and the Human Dialogue Centre to mark the opening of the UN Review Confe:rence on the Small Arms Trade. 2006: Men and Guns, The Dutch Foreign Ministry, The Hague. A joint exhibition, with Heidi Schumann, funded by the Human Dialogue Centre. 2007: Men and Guns, 116th Assembly of Inter Parliamentary Union, Bali. A joint exhibition, with Heidi Schumann, funded by the Human Dialogue Centre. 2007: Human Face of Gun Violence, Museum of Pristina, Kosova. A joint exhibition funded by IANSA and the Human Dialogue Centre. 2008: Old People of Kyrgyzstan, Helpage International Bishkek, Kyrgyzstan. A joint exhibition with Malik Alymkuloff organized by Helpage International Bishkek, Kyrgyzstan. 2008: World Food Crisis Photography Exhibition, New York. Participator in a fund raising exhibition and multi-media event in New York in support of the Nuru Project. 2010: Care International Photographic Exhibition, Thames Path in London. Participator in an awareness raising exhibition on the Thames Path in London 2011: Hidden Faces – Women in Afghanistan, House of Commons, London. Exhibition in the House of Commons to promote awareness of women's rights in Afghanistan. 2011: Brothers in Arms, Nairobi National Museum. Portraying the role of the African Union in Mogadishu, Somalia. Nairobi. 2012: Brothers in Arms, Kampala National Museum. Portraying the role of the African Union in Mogadishu, Somalia. Kampala. 2012: Brothers in Arms, Bujumbura UN Information Centre. Exhibition in Bujumbura UN Information Centre portraying the role of the African Union in Mogadishu, Somalia. Bujumbura. 2013: Children of Somalia, EU Somali Conference, EU Parliament, Brussels. Exhibition showing photographs taken by Somali Children as part of a Photoclub Project run by Holt in conjunction with UNICEF Somalia, as well as a selection of Holt's work from Somalia to mark the EU Somali Conference 2013: Unseen Enemy Exhibition, National Army Museum in London. Exhibition exploring the use of IEDs in Afghanistan. 2016: Shared Success: Agriculture Transformation @ 10, Nairobi National Museum in Kenya. Exhibition for the Rockefeller Foundation and AGRA to celebrate the success of farmers and small-scale businessmen and women in four of the 18 African countries that the Rockefeller Foundation and AGRA have been assisting over the past decade. 2017: South Sudan: The Cost of a Relentless War. Panel discussion about the human cost