Paul Carroll

Senior Advisor
San Francisco, CA

Paul Carroll is the Senior Advisor at N Square, based in San Francisco, CA. Launched in 2014 as a collaboration among leading funders in the nuclear security field, N Square facilitates the introduction, initiation, and integration of new ideas and new resources to reduce risks from nuclear weapons and materials.

Paul is a well-regarded expert on a broad array of nuclear weapons topics, from the history and current status of US plans and programs, to international programs and treaty regimes. He has a particular expertise on the Department of Energy’s nuclear weapons infrastructure – where warheads are designed, built, tested, and stored. He also is an expert on North Korea’s program and the challenges to limiting it, having traveled to the DPRK twice with nongovernmental delegations.

For 17 years before joining N Square, Paul was the Director of Programs at the Ploughshares Fund. He led all of Ploughshares’ grantmaking efforts and provided strategic guidance to the president, executive director and the board. Prior to Ploughshares Fund, Paul worked on nuclear weapons issues in the U.S. Congress’ Office of Technology Assessment and the U.S. Department of Energy in Washington, DC. He also worked on environmental issues at a regional office of the U.S. Environmental Protection Agency. He has published articles and appeared as a commentator for a number of media outlets including The Daily Beast, Hannity, CNN International, Fox News, AP Radio, Canadian Broadcasting Corporation and Al Jazeera America, among others.

Paul has a Bachelor’s degree from Rutgers University and a Masters of Public Policy in National Security Studies from the University of Maryland.

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Recent content

Sung Kim, an experienced and competent professional who has worked on Korean issues for years as a senior U.S. diplomat, has been nominated to the post of U.S. Ambassador to South Korea. Our ally Seoul has indicated its support of the Kim nomination.

September 7, 2011 - By Paul Carroll

Today we learned that Jonathan Tucker has passed away. Jonathan was a highly respected expert on chemical and biological weapons and policy issues and Ploughshares Fund is proud to have supported his efforts towards a safer and more peaceful world.

August 2, 2011 - By Paul Carroll

It has been two years since North Korea set off its second nuclear test, and nearly as long since an American official has been to the Hermit Kingdom.

May 26, 2011 - By Paul Carroll

May 11, 2011 - By Paul Carroll

May 4, 2011 - By Paul Carroll

While Americans are filing their taxes, North Koreans are throwing a party.

April 15, 2011 - By Paul Carroll


February 22, 2010 - By Paul Carroll


November 18, 2009 - By Paul Carroll

As the saying goes, everything old is new again. And so it seems with nuclear weapons. Calls for abolishing nuclear weapons are as old as the Manhattan Project that created them. Since that time, there have been ebbs and flows of progress, public attention and political energy devoted to the goal. Today, we are seeing an impressive new momentum and urgency to achieving real and lasting reductions in the world's nuclear arsenals, with complete elimination as the ultimate goal. So, what's new? 

August 19, 2009 - By Paul Carroll

Has former President Bill Clinton's successful mission to Pyongyang to win the release of two American journalists opened up a new chapter in U.S.-North Korea relations?  

August 4, 2009 - By Paul Carroll