About

“When preparing for crises, it is instructive to recall that Noah started building the ark before it began to rain.”– Norm Augustine

Not a Think Tank (NATT) is made up of a group of forward-looking security directors seeking to stimulate thoughts and ideas in the humanitarian safety and security space, from which practice changes may flow. We are learning from the past and sharing good practice in the present. NATT wants to start a conversation about the future issues and create a space for other humanitarians to discuss them with us.

Marieke van Weerden has made her career in the humanitarian security sector, climbing through the ranks into her current leadership position. Marieke has an academic background in history and human rights and has evolved her hands-on security risk management experience with strategic insights at IE Business School (Spain) and University of Pennsylvania’s Wharton Business School. She is passionate about building a career pathway for NGO security, revolutionising the way security is communicated and driving the creation of a community widely known for its innovation, resilience and agility.

Sean Denson has a military, policing and intelligence background and has worked in humanitarian security for more than 10 years. Sean’s professional interests include systems and design thinking, futures studies and practice improvement. Sean studied criminology, criminal justice and strategic studies at undergraduate and masters level and is currently pursuing a doctorate in security risk management.

Chris Williams is a security professional, with experience of working across a number of sectors and disciplines. As an advocate for innovation and development of best practice for security systems and approaches, Chris’s work in recent years has focused on access and operations in high-risk or complex environments. Chris holds a BSc. in International Disaster Engineering and Management from Coventry University and several post grad certificates in security and risk management. He is also a keen youth rugby coach and passionate racing sailor.