Melissa Hanham

Deputy Director, Open Nuclear Network | Director, Datayo Project

Melissa Hanham is the Deputy Director of Open Nuclear Network (ONN), a programme of One Earth Future, and also directs its Datayo Project. She is an expert on weapons of mass destruction (WMD), which include nuclear, chemical and biological weapons and their delivery devices such as missiles and bombers. She has studied North Korea and China’s WMD programs for over a decade.

Melissa is an expert on open source intelligence, incorporating satellite and aerial imagery and other remote sensing data, large data sets, social media, 3D modeling and GIS mapping. She is particularly focused on the monitoring and verification of international arms control agreements using open source evidence. Melissa also uses open source information to study export-control systems and proliferation finance activities.

Melissa is an affiliate of Stanford University’s Center for International Security and Cooperation. She is a regular contributor to Arms Control Wonk, the leading blog and podcast on disarmament, arms control and non-proliferation. In 2018, she was awarded the Paul Olum Grant Fund for being one of the most inventive scientific and technical minds working to reduce the threat of nuclear weapons. She previously worked at the Middlebury Institute of International Studies in Monterey, CA and the International Crisis Group in Seoul and Beijing.


  • Nuclear weapons
  • Weapons of mass destruction: chemical, biological, nuclear weapons
  • Ballistic and cruise missiles
  • Ballistic missile defense
  • North Korea
  • China
  • Iran
  • Anti-money laundering, sanctions, counter-proliferation finance
  • Open-source intelligence
  • Satellite imagery, remote sensing and geographic information systems
  • Non-proliferation, arms control and disarmament
  • Treaty verification
  • Gender in conflict