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The Union of Concerned Scientists (UCS) is a national nonprofit organization founded in 1969 by scientists and students at the Massachusetts Institute of Technology. Its mission is to use rigorous, independent science to solve the planet's most pressing problems. UCS combines technical analysis and effective advocacy to create innovative, practical solutions for a healthy, safe, and sustainable future. With nearly 250 scientists, analysts, policy experts, and strategic communicators, UCS works on issues including climate change, clean energy, sustainable agriculture, and global security, striving to ensure that science serves the public good.
Serves as the central hub for the organization's research, policy analysis, national advocacy coordination, communications, and administrative operations. It's where key strategies are developed to address critical environmental and security issues.
Located in a historically significant area renowned for intellectual pursuits, providing proximity to leading academic institutions like Harvard and MIT. The office itself is designed to support a collaborative and dynamic work environment for its interdisciplinary teams.
Characterized by a mission-driven, passionate, and intellectually rigorous environment. Employees are deeply committed to scientific integrity, evidence-based advocacy, and fostering positive social and environmental change. Collaboration and critical thinking are highly valued.
The Cambridge headquarters is significant due to its historical roots (UCS was founded at nearby MIT), its role as the primary command center for national initiatives, and its location which facilitates access to scientific talent and partnerships.
While the Union of Concerned Scientists primarily operates within the United States with physical offices in key regions, its work addresses issues of profound global significance. UCS tackles challenges like climate change, nuclear proliferation, and sustainable food systems that transcend national borders. The organization's research is internationally recognized, and its experts frequently collaborate with international scientists, NGOs, and governmental bodies. UCS advocates for U.S. policies that contribute to global solutions and participates in international forums to promote science-based approaches to worldwide problems, effectively having a global impact through its influence on U.S. policy and its contributions to global scientific understanding.
2 Brattle Square
Cambridge
MA
USA
Address: 1825 K St. NW, Suite 800, Washington, DC 20006-1232
Serves as the primary liaison with the U.S. federal government, working to integrate science into national policymaking and hold decision-makers accountable.
Address: 1 N. LaSalle St., Suite 1904, Chicago, IL 60602
Drives scientific and policy engagement on environmental and energy challenges pertinent to the American Midwest, building regional momentum for change.
Address: 500 12th St., Suite 340, Oakland, CA 94607-4012
Works to advance progressive environmental and energy policies in California and the Western states, often setting precedents for broader national and international action.
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As of April 2025, Union of Concerned Scientists' leadership includes:
Union of Concerned Scientists has been backed by several prominent investors over the years, including:
Over the past 12-18 months, the Union of Concerned Scientists has made strategic additions to its executive leadership, notably appointing a Chief Equity Officer and a Chief Development Officer to enhance its organizational capacity and mission impact. No major executive departures have been publicly announced during this period.
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The Union of Concerned Scientists primarily uses an email format that combines the first initial of an employee's name with their full last name, followed by the @ucsusa.org domain. This is a common and professional structure for organizational email addresses.
[first_initial][last_name]@ucsusa.org
Format
jdoe@ucsusa.org
Example
85%
Success rate
UCS Blog (ucsusa.org) • May 1, 2024
UCS lauded new Bureau of Land Management (BLM) rules reforming oil and gas leasing on public lands, aimed at ensuring fairer taxpayer returns and better protection for public lands and cultural resources....more
UCS Press Release (ucsusa.org) • April 25, 2024
UCS praised the Environmental Protection Agency's (EPA) final carbon pollution standards for fossil fuel power plants, calling them vital for public health, climate action, and transitioning to clean energy....more
UCS Blog (ucsusa.org) • April 16, 2024
A UCS analysis found many U.S. nuclear power plants are inadequately prepared for increasing climate change threats like floods and extreme heat, raising safety and reliability concerns....more
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