Roger Nash co-founded Fieldview Solutions and co-directed its work from 2008 to 2014, drawing from his diverse background of human rights and humanitarian field work in Colombia, Afghanistan, Sri Lanka, and Sudan. His academic work has focused on maximising the protective impact of UN field presence in conflict.

Roger began human rights field work supporting threatened rural communities and human rights activists in north-west Colombia with Peace Brigades International. He was the head of the UNHCR office in Batticaloa in eastern Sri Lanka during a period of rising tensions and intermittent displacement. He was later the Head of Mission of Médecins du Monde France in Afghanistan, and also worked as a child protection specialist with UNICEF in Sudan. Roger was a member of the International Council of Peace Brigades International from 2005 to 2010. In 2007 he was awarded the SNELS prize from the University of Essex Human Rights Centre for his academic work on the creative use of field presence by UN human rights field missions.

During his tenure at Fieldview Solutions, Roger was engaged in co-designing and leading OCHA ProCap trainings (Protection Standby Capacity),  DPKO Civil Affairs training, WFP Protection in Food Security Operations trainings, and ECOWAS humanitarian emergency teams trainings. He co-authored (with Liam Mahony) Influence on the Ground: Understanding and Strengthening the Protection Impact of United Nations Human Rights Field Presence, and A Framework for a Holistic Approach to UNSC Resolutions on Protection of Civilians, Children and Armed Conflict, and Women, Peace and Security , and was the sole researcher/author of "An Independent and Courageous Spokesman? NRC and the dilemmas in Sri Lanka, 2009" (for the Norwegian Refugee Council).