Senior Scientist

Senior Scientist

Global Security Program

Union of Concerned Scientists

Cambridge, MA



The Position

The Union of Concerned Scientists (UCS) is an independent national nonprofit that uses science to protect our health, safety, and environment.  We are scientists, engineers, economists, activists and everyday people who develop and advocate for innovative, practical solutions to some of our planet’s most pressing problems—from combating global warming and developing sustainable ways to feed, power, and transport ourselves, to fighting misinformation, advancing racial equity, and reducing the threat of nuclear war.


The Global Security Program works to improve US nuclear weapons and arms control policies and reduce the risk of the use of nuclear weapons, through a combination of technical analysis, advocacy, and education and engagement with the public, policy makers, and the press.


Your expertise will strengthen our team’s ability to perform technical analysis of nuclear weapons and related issues, to consider the policy implications, and to communicate findings to a range of different audiences—both technical and non-technical.




  • Carry out technical research and policy analysis with a primary focus on nuclear weapons and arms control issues;
  • Serve as a technical authority and spokesperson on these issues for UCS;
  • Engage with policy makers to educate them and promote policy change;
  • Increase visibility and understanding of these issues in the press, the public, and the scientific community.


Qualifications and Experience

You’ll need a broad, comprehensive knowledge of a physical science as typically acquired through completion of a doctoral program. You should be an effective communicator, comfortable with public speaking and able to write for both technical and non-technical audiences. You should know how to manage projects and workloads and have an interest in engaging in policy analysis and advocacy. PhD preferred.

This work requires five to seven years of successful comparable and relevant experience in research and policy analysis of nuclear weapons and other arms control issues.

At UCS, comparable training and/or experience can be substituted for degrees when appropriate.


The position is likely to require extended periods working at a computer and several days per month of travel for meetings, briefings, etc., including some overnight stays. Travel will be primarily domestic but may include some international travel for meetings.


UCS is an equal opportunity employer actively seeking to diversify its staff. In particular, we’re dedicated to broadening opportunities for individuals from demographic groups that are historically underrepresented in the sciences and in environmental advocacy. We’re also committed to building an inclusive workplace culture where talented people of widely diverse backgrounds can thrive. We believe the inclusion of culturally diverse perspectives will improve our work and produce better societal and environmental outcomes for all, including historically disenfranchised communities.


Compensation, Hours and Location

This is a full-time position, preferably based in the UCS Cambridge office. UCS offers a competitive salary for those who meet all job requirements, excellent benefits, and a rewarding work environment. Information about the organization is available at A listing of all open jobs is available at


To Apply:

Please upload a cover letter, resume, and writing sample. Upload materials in Word or PDF format only. No phone calls, please.


Deadline: April 6 or until filled.

Please check your e-mail for a link to activate your account.