Paul has worked, spoken, and published widely in the areas of international security, threat reduction, non-proliferation, and weapons demilitarization for over three decades and took part in the first on-site inspection by US officials of the Russian chemical weapons stockpile at Shchuch’ye in the Kurgan Oblast in 1994. Since that time he has worked closely with the Organization for the Prohibition of Chemical Weapons (OPCW), US and Russian officials, the Cooperative Threat Reduction (CTR) Program, the G-8 Global Partnership, and other multilateral regimes to help foster cooperative, timely, and safe elimination of nuclear, chemical, and biological weapons and related systems.
In December 2009 at the 14th Conference of the States Parties in The Hague, Paul led the effort to establish the CWC Coalition, an international NGO network to support the Chemical Weapons Convention and OPCW. Paul is also a founding member of the Fissile Material Working Group, which supported the 2010 Nuclear Security Summit.
Some of his articles include Abolishing Chemical Weapons: Progress, Challenges, and Opportunities, in Arms Control Today (November 2010) and The legacy of Reykjavik and the future of nuclear disarmament, (with Jonathan Hunt) in the Bulletin of the Atomic Scientists (December 2011).