The Nuclear Threat Initiative (NTI) is pleased to announce the appointment of Alex Tiersky, who has served in senior Congressional and White House staff roles on foreign affairs and national security issues for more than a decade, as Vice President, Government Relations. In this new NTI role, he will oversee NTI’s legislative and executive branch strategy and advocacy efforts, shaping and driving the organization’s policy agenda in the U.S. government.
“We are delighted to welcome Alex and work with him to create a dedicated focus on working with Capitol Hill to achieving common goals to reduce nuclear and biosecurity risks,” said NTI President and Chief Operating Officer Joan Rohlfing. “Alex’s valuable experience and dedication to NTI’s mission will be a tremendous boost to our work.”
Prior to joining NTI, Tiersky served in senior executive branch appointments, including on the National Security Council staff, where he served as director for Western Europe, and at the U.S. Agency for International Development, as senior advisor for Ukraine Recovery.
From 2016 to 2023, he was a senior policy advisor at the U.S. Commission on Security and Cooperation in Europe (U.S. Helsinki Commission), empowering efforts by bipartisan coalitions of senators and House members to counter Russian aggression and bolster alliances. As a specialist in foreign affairs with the U.S. Congressional Research Service (2012-2016), Tiersky provided expert advice to members of Congress and staff on national security and foreign policy legislation, policy, and oversight activities.
Also joining NTI are:
Sign up for our newsletter to get the latest on nuclear and biological threats.
The Nuclear Threat Initiative (NTI) joined world leaders and policymakers at the 2026 Munich Security Conference (MSC), where NTI President and CEO Christine E. Wormuth and colleagues hosted events focused on reducing nuclear, biological, and emerging technology threats imperiling humanity.
NTI endorses the bipartisan Biosecurity Modernization and Innovation Act of 2026, led by Senators Tom Cotton (R-AR) and Amy Klobuchar (D-MN). This bill creates an important opportunity to incentivize a safe and secure U.S. bioeconomy through strengthened biosecurity policy.
As the last remaining U.S.-Russia nuclear limitations treaty expires on Feb. 5, an overwhelming majority of Americans (91 percent) say the United States should negotiate a new agreement with Russia to either maintain current limits on nuclear weapons or further reduce both countries’ arsenals.
Sign up for regular updates on innovative, real-world solutions to existential threats.
