Meet Our Experts

Steve Andreasen

National Security Consultant
Steve Andreasen spent eight years at the U.S. National Security Council as a principle advisor on strategic policy, nuclear arms control and missile defense. During the George H.W. Bush and Reagan Administrations, Andreasen served in the U.S. State Department.

Robert E. Berls, Jr., PhD

Senior Advisor on Russia and Eurasia
Robert E. Berls, Jr. has a deep background in Soviet/Russian energy and nuclear weapons issues. During the first Clinton Administration, he was special assistant for Russia/NIS Programs to the secretary of energy.

Andrew Bieniawski

Vice President, Material Security and Minimization
Andrew Bieniawski joined NTI after 25 years of service with the U.S. Department of Energy and the National Nuclear Security Administration.

Des Browne

Vice Chairman, NTI
Lord Browne is a Member of the House of Lords in the United Kingdom and a former British Secretary of State for Defense. He is also the Chair of the Board of Trustees and Directors of the European Leadership Network.

John Carlson

Based in Australia, John Carlson counsels NTI on international nuclear security, safeguards and verification issues. Before retiring from government, he was director general of the Australian Safeguards and Nonproliferation Office. He was chairman of the Standing Advisory Group on Safeguards Implementation from 2001 to 2006.

Andrew Newman, PhD

Senior Program Officer, Material Security and Minimization
Andrew Newman joined NTI in 2011. Previously, Newman was a research associate with Harvard University's Project on Managing the Atom.

Sam Nunn

Co-Chairman and Chief Executive Officer, NTI
Former U.S. Senator Nunn represented Georgia for 24 years (1972-1996), where he served as Chairman of the Senate Armed Services Committee and the Permanent Subcommittee on Investigations and on the Intelligence and Small Business Committees.

Samantha Pitts-Kiefer

Senior Program Officer & Director, Global Nuclear Policy Program
Samantha Pitts-Kiefer joined NTI in June 2012 and serves as Director of the Global Nuclear Policy Program.

Joan Rohlfing

President and Chief Operating Officer, NTI
A founding NTI staff member, Joan Rohlfing became president of NTI in January 2010, after nine years as NTI's senior vice president for programs and operations. Before joining NTI, she held senior positions with the U.S. Department of Energy, as senior advisor for national security to the Secretary of Energy and as director of the Office of Nonproliferation and National Security.

Deborah G. Rosenblum

Executive Vice President
Deborah G. Rosenblum became executive vice president of NTI in 2010, after serving as senior director, strategic planning and operations beginning in 2009. Prior to NTI, she spent seven years as vice president of The Cohen Group, an international consulting firm. She served for 12 years in several senior positions with the U.S. Department of Defense in the areas of homeland defense, peacekeeping operations and support, nuclear forces and counter-proliferation policy.

Dr. Page Stoutland, PhD

Vice President, Scientific and Technical Affairs
Page Stoutland joined NTI in 2010 from Lawrence Livermore National Laboratory (LLNL), where he held a number of senior positions.

Isabelle Williams

Senior Advisor, Global Nuclear Policy Program
Isabelle Williams joined NTI in 2007 and serves as Senior Adviser to the Global Nuclear Policy Program. As part of this work she helps coordinate the international strategy of the program, managing the work of NTI’s global partners who conduct various activities in their countries and regions to promote reducing reliance on nuclear weapons, preventing their use and their spread, and ultimately ending them as a threat to the world.