Derek Johnson

Chief Executive Officer

As a creative strategist working on the front lines of catalytic advocacy, foreign policy and social change, Derek has spent the last 8 years positioning Global Zero as a highly credible source of policy analysis and thought leadership, a trusted intermediary among nuclear-armed states, and a provocative advocacy operation in key regions. He has a knack for identifying strategic opportunities and the right tactics that can push the message into the mainstream in order to shine a spotlight or apply pressure. In addition to developing organizational strategy, overseeing day-to-day operations, and leading fundraising efforts, Derek also spearheads special projects — from coordinating sensitive track-1.5 initiatives to producing viral and award-winning creative content.


Derek is a graduate of Cornell College and Boston College Law School. Before taking the helm at Global Zero, Derek worked to advance interfaith dialogue and cooperation on social issues at the Council for a Parliament of the World's Religions and helped organize its flagship convening in Melbourne, Australia. He also worked to enhance access to justice, human rights and rule of law at JUSTICE, the British section of the International Commission of Jurists in London, and worked as an attorney for several years in Boston.


Derek is also a member of the Munich Young Leaders group of rising experts in foreign and security policy, jointly organized by Körber Foundation and the Munich Security Conference; the European Young Leaders group, organized by Friends of Europe; and a Nuclear Innovation Fellow at NSquare Collaborative.


Derek has been quoted or published in The New York Times, The Washington Post, USA Today, Newsweek, BBC News, The Nation, Politico, the Los Angeles Times, The Guardian, Vox, Kommersant, Time Magazine, FAZ, Mother Jones, The Baltimore Sun, Pacific Standard, Christian Science Monitor, The Hill, The Independent, Mic, Huffington Post, Inkstick, and more. You can follow Derek on Twitter at @derekjGZ.

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Jon Wolfsthal

Senior Advisor

Jon Wolfsthal is director of the Nuclear Crisis Group, an independent nonpartisan group of globally-recognized former military officials, diplomats, and security experts dedicated to preventing crises from escalating to the use of nuclear weapons. From 2014 to 2017, he served as special assistant to former U.S. President Barack Obama and as senior director for arms control and nonproliferation at the National Security Council. In that post, he was the most senior White House official, setting and implementing U.S. government policy on all aspects of arms control, nonproliferation, and nuclear policy. Prior to that, he served as the deputy director of the James Martin Center for Nonproliferation Studies at the Monterey Institute for International Studies.


From 2009 to 2012, Wolfsthal served as the special adviser to U.S. Vice President Joe Biden for nuclear security and nonproliferation and as director for nonproliferation on the National Security Council. He supported the Obama administration’s negotiation and ratification of the New START arms reduction agreement with the Russian Federation and helped support the development of nuclear policy, including the 2010 Nuclear Posture Review.

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Jessica Sleight

Program Director

After joining Global Zero as a program intern in 2013, Jessica currently serves as Program Director. In this capacity, she provides research and analysis on issues relating to nuclear nonproliferation, risk reduction and disarmament; coordinates track-1.5 and track-2 diplomatic efforts, including commission-level meetings and government consultations; and liaises with Global Zero leaders and experts in connection with policy initiatives. Prior to joining Global Zero, Jessica worked as a research intern with Ploughshares Fund,  a research associate for the Japan Policy Research Institute, and a graduate fellow at the Nautilus Institute for Security and Sustainability. She has a master’s degree in Asia-Pacific studies from the University of San Francisco.


You can follow Jessica on Twitter at @jmsleight.

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Aaron Manzo

Operations Director

Manzo joined the Global Zero team in May 2013. As the Operations Director, he oversees daily operational and administrative duties including finance, HR and benefits administration, and compliance with federal and state regulatory agencies, as well as legal and tax obligations. He obtained his master's degree in Administration of Justice & Security at the University of Phoenix. Manzo works behind the scenes to identify big-picture HR and organizational needs to keep Global Zero running effortlessly and efficiently. Prior to joining Global Zero, he served as a deputy clerk at the District of Columbia Superior Court.

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Colleen Moore

Digital Engagement Manager

Colleen joined the Global Zero team in September 2018 as a Digital Organizer, now serving as Digital Engagement Manager, writing and creating content to promote the message of eliminating nuclear weapons. Colleen has experience in campaigning for justice and peace issues, including ending U.S. support for the war in Yemen, promoting human rights and justice in Indonesia and East Timor, working for peace between North and South Korea, and advocating for access to education for women in Pakistan. Above all, she has a passion for using digital mediums to advance causes of human rights and justice.

Colleen received her Bachelor of Arts degrees in International Relations and Political Science from Hobart and William Smith Colleges and a Master of Arts degree in International Relations from American University's School of International Service. She previously held roles at Win Without War, Seeds of Peace, East Timor and Indonesia Action Network, and Peace Action New York State. She is currently an Innovation Fellow with N Square Innovation Network. 
You can follow her on Twitter at @cmoo11_.

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Emma Claire Foley

Program Associate

Emma Claire joined the Global Zero team in 2018 as a Research and Policy Intern. Now serving as the Program Associate, she works with the Program Director on research relating to nuclear nonproliferation, risk reduction, and disarmament advocacy efforts, and monitoring domestic and international policy developments. Emma Claire received her Master’s degree from Harvard University’s Davis Center for Russian and Eurasian Studies, and her Bachelor’s degree in Russian, East European and Eurasian Studies and History from the University of Michigan.

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Enrico Orr

Operations Assistant

Enrico joined the Global Zero team in April 2018 as the Operations Assistant. In this role, he assists the Operations Director with day-to-day operations and administrative work in Global Zero’s DC location. Enrico obtained his Master’s Degree in International Affairs from The Catholic University of America. He received his Bachelor’s Degree at the College of Charleston, double majoring in Political Science and Studio Art.

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