[2] Drawing on more than 20 years of experience with the UN, he criticized its sclerotic personnel system, a lack of accountability, insufficient impact and the UN's inability to deal with transgressions by its own staff.
From 23 September 2014 to 3 January 2015, Banbury served as the Special Representative of the Secretary-General and Head of the United Nations Mission for Emergency Ebola Response.
In January 2014 the Secretary-General appointed Banbury as the UN Central African Republic Crisis Manager at a time of widespread violence, population displacement and risk of genocide.
From that position Banbury designed and led the UN system's operational response to the most deadly natural disaster in the western hemisphere in modern history, working closely with the Haitian government, the U.S. military's Operation Unified Response, and non-governmental organizations to save lives, bring aid to the Haitian people and rebuild MINUSTAH, the UN's peacekeeping mission.
Banbury also served as the Asia Regional Director for the World Food Programme in Bangkok from 2003 to 2009, where he managed humanitarian relief and development operations in 14 countries.