David Leenstra is the Networks & Membership Coordinator for the Strong Cities Network, supporting day-to-day engagement with member cities and liaising with local governments interested in joining the Network. He is also involved in developing and implementing strategies to improve Strong Cities’ outreach and engagement with members. Prior to joining the Strong Cities Management Unit, David was an ISD Research Associate, contributing to a wide range of research projects focusing on extremism, hate and conspiracy theories online. He has also conducted ethnographic fieldwork in Flanders on right-wing extremist youth movements and research on Islamic State online propaganda, politics and legitimation strategies. He holds Master’s degrees in Conflict Studies & Human Rights from Utrecht University and in International Relations History from the University of Amsterdam.