I have been very fortunate to work in the United Nations Secretary-General’s office to help prepare the 19 September United Nations Summit on Refugees and Migrants. Seconded by my university and supported by the United Nations High Commissioner for Refugees (UNHCR), my particular task was to be the ‘pen-holder’ in drafting the Secretary-General’s report, In Safety and Dignity: Addressing Large Movements of Refugees and Migrants and to support the Special Advisor for the Summit, Karen AbuZayd in the preparations. Although I’ve worked closely with several UN agencies and the International Organization for Migration in different capacities over the years, I’d never worked for the UN before. To say it has been a learning experience is an understatement. The most important and difficult lesson I have learned is the need to get the ‘level of ambition’ right.