Our Team

Marcus is a co-founder and co-CEO at Rethink Priorities, where he leads research and strategy. He's also a co-founder of Charity Entrepreneurship and Charity Science Health, where he previously systematically analyzed global poverty interventions, helped manage partnerships, and implemented the technical aspects of the project. Marcus manages RP’s animal welfare research and global health/development research.

• Publications

Peter is the other co-founder and co-CEO of Rethink Priorities. Prior to running Rethink Priorities, he was a data scientist in industry for five years. He is an avid hobbyist forecaster and consistently ranks well in forecasting competitions, including being a top 20 forecaster on Metaculus. Peter manages Rethink Priorities’ longtermism and survey work.

• Publications

Janique is the Director of Development at Rethink Priorities. She oversees our communications and fundraising. She cultivates relationships with major donors and institutional grantmakers and helps us find funders for our new research projects. Janique previously was in charge of strategy and community-building at Effective Altruism Zurich and interned at EA Geneva. She holds an MBA with a focus on philanthropy advisory services.

Carolyn is the Chief of Staff to the Chief Operating Officer (COO) at Rethink Priorities. She has a Master of Science in Public Health degree from Johns Hopkins Bloomberg School of Public Health. Carolyn has close to a decade of experience working in the global health and development sector, where she created digital health solutions for healthcare workers in low and middle income countries.

Kieran Greig is the Chief Strategy Analyst at Rethink Priorities. He works with the Leadership Team to advise on Rethink Priorities’ strategy and execution, at all levels. Prior to that, he was the sole researcher consulting for Farmed Animal Funders. Previously he worked as a researcher at Animal Charity Evaluators, and at Charity Science, where he systematically analyzed global poverty interventions. He has a B.Sc. from Monash University and a Masters from La Trobe University.

As the COO, Rachel Martinez oversees Rethink Priorities’ operations, including finance, HR, development, and communications. Rachel graduated with a Juris Doctorate from Hofstra Law School, and has spent the last decade working with and both for-profit and nonprofits entities in the areas of legal advisement, financial planning, and operations. She is passionate about helping people grow and thrive in their careers and personal endeavors alike.

David Moss is the Principal Research Director at Rethink Priorities. He previously worked for Charity Science and has worked on the EA Survey for several years. David studied Philosophy at Cambridge and is an academic researcher of moral psychology.

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Daniela R. Waldhorn is Director of Animal Welfare at Rethink Priorities. She has more than 15 years of experience in animal advocacy in Latin America and Europe, and has extensively researched several farmed invertebrate welfare issues. Daniela is also a Ph.D. researcher at the Department of Social Psychology at the University of Barcelona, a board member of the Centre for Animal Ethics, an Associate Professor at Pompeu Fabra University, and a research member of the COMPASS Project at the same university. She also serves as an advisor to the Shrimp Welfare Project and the Aquatic Life Institute. Daniela has an MS in International Development (Jaume I University and University of Valencia) and an MS in Ethics and Politics (University of Barcelona), and you can reach out to her in Spanish, Catalan or English.

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William McAuliffe is a Senior Research Manager and Editor in the Animal Welfare Department at Rethink Priorities. He earned his PhD in psychology at University of Miami, where he conducted research on the evolution of cooperation in humans and earned a concentration in quantitative methods. Before joining Rethink Priorities in 2021, he was a postdoctoral scholar at Harvard Medical School and Cambridge Health Alliance.

Neil is a Senior Research Manager at Rethink Priorities and holds a Ph.D. in Political and Social Sciences. Before joining RP, Neil worked as a data manager for an online voter platform and volunteered for Charity Entrepreneurship and Animal Charity Evaluators.

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Jacob is a Senior Research Manager at Rethink Priorities focused on farmed animal welfare. In his previous role as Director of The Humane League Labs, he studied plant-based milk alternatives, education to reduce meat consumption, and global cage-free campaigns. He earned a degree in Computational Biology from Rutgers University and is an advocate for open science.

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Elisa is a Research Assistant in the Animal Welfare Department, working more specifically on invertebrate welfare. After completing an undergraduate degree in social science, she earned a master’s degree in political science at Paris Sciences et Lettres University in 2021. Before joining RP, Elisa was working as a Research Assistant and Coordinator of a public policy evaluation project at Sciences Po Paris.

Hannah is an Associate Researcher in the Wild Animal Welfare team. She was previously a Research Fellow at RP where she wrote about potential applications of AI for monitoring the welfare of wild animals, particularly via their vocalizations. She completed an undergraduate degree in zoology and a master’s in biological anthropology.

Samara is a Senior Economist at Rethink Priorities and holds a Ph.D. in Economics. Before joining RP, Samara worked at The Humane League. Samara researches agricultural economics, industrial organization, and public policy and is passionate about progressing environmental, economic, and social justice for human and non-human animals.

Sagar is a Senior Researcher focused on farmed animal welfare. He joined Rethink Priorities from the Bank of England, where his responsibilities included risk assessment, policy development, and forecasting. Sagar holds degrees in economics from Oxford University (BA) and the London School of Economics (MSc), and serves as Treasurer on the board of Veganuary.

Ben is an Animal Welfare Research Assistant, supporting investigations on effective interventions to promote zero-suffering diets. He graduated from the University of Oxford with an English degree in 2021 and has previously worked as a grant writer. Ben is based in the UK and is interested in animal ethics, philosophy, cycling, and coffee tasting.

Melanie is a Senior Research Manager working on the Global Health and Development (GHD) team. Before joining RP, she was a Research Analyst at Charity Entrepreneurship, looking into promising GHD, health policy, and health security initiatives. Melanie holds a PhD in Neuroscience from Harvard University, a Micromasters in Data, Economics and Development Policy from MITx, and a BSc in Biology from Universidad de Buenos Aires.

Tom Hird is a Senior Research Manager at Rethink Priorities working on the Global Health and Development team. Before joining Rethink Priorities, Tom was a research lead for the Stopping Tobacco Organizations and Products (STOP) Partnership, Research Fellow at the University of Bath, and postdoctoral fellow at Monash University working on policy research and advocacy around the commercial and structural determinants of health. Tom holds an MPhil and PhD in Global Health from the University of Cambridge and a BSc in Biology from Imperial College London.

Ruby is a Researcher at Rethink Priorities. She has a background in economics, policy, and development, having recently completed an MPhil in Economics at the University of Oxford. Before coming to Rethink, she worked in strategy consulting and policy research, with a focus on impact measurement and program evaluation.

Greer Gosnell is a Senior Researcher II at Rethink Priorities. Before joining RP, Greer earned her doctorate and completed a postdoctoral fellowship in environmental economics from the London School of Economics and Political Science. Greer is an open science advocate and field experimentalist specializing in rigorously testing the impact of policies and practices on environmentally relevant behavior and decision-making.

James Hu is a Research Analyst in the Global Health and Development Department at Rethink Priorities. Before joining RP, James graduated with a BS in Environmental Science from the University of Chicago. While studying, he interned with several nonprofits, including the Lead Exposure Elimination Project, and conducted research in geology, ecology, and energy studies.

Jenny is a Senior Researcher at Rethink Priorities. She has a background in economics with a specialization in global health, development, and impact evaluation. Before coming to RP, she was a PhD candidate at Erasmus University Rotterdam and Tinbergen Institute and worked as a policy evaluation consultant for the Dutch Ministry of Foreign Affairs. In her work and research, she investigated how to improve healthy behaviors in low- and middle-income countries.

Aisling is a Senior Researcher II at Rethink Priorities focusing on global health and development. Prior to joining RP, she was the Head of Analytics at the Against Malaria Foundation.

Carmen is a Researcher on the Global Health and Development team. She has lived in Bhutan, Nepal and the Netherlands and hopes to contribute to better living conditions for people across the globe. Before joining Rethink Priorities she worked as a consultant and researcher for different clients in the public sector. In that role helped the national and regional governments in the Netherlands make better decisions using social and quantitative insights. Carmen holds an MSc in Mathematics, a BSc in both Physics and Mathematics and a Micromasters in Data, Economics and Development Policy from MITx.

Jamie Elsey is a Senior Behavioral Scientist at Rethink Priorities, with a background in psychology and neuroscience. Before joining RP, Jamie earned a PhD in Clinical Psychology from the University of Amsterdam, where he investigated novel approaches to the treatment of anxiety disorders. His previous research work has also included the development of tools for statistical inference, online interventions, discussion of drug policy and food policy, and neuroethics.

Willem Sleegers is a Senior Behavioral Scientist at Rethink Priorities. As part of the survey team, he conducts research on attitude assessments and attitude change, using surveys and experimental designs. His research interests cover everything EA, with a particular interest in animal welfare. He is a strong supporter, and contributor, of open science. Before joining RP, he worked as an Assistant Professor at Tilburg University, where he also obtained his Ph.D.

Bob Fischer is a Senior Research Manager at Rethink Priorities, an Associate Professor of Philosophy at Texas State University, and the Director of the Society for the Study of Ethics & Animals. He has published widely on problems in animal ethics, applied ethics more generally, and epistemology.

Hayley is a Philosophy Researcher at Rethink Priorities and an Associate Professor of Philosophy at the University of Wisconsin-Madison. Her research concerns questions about animal minds, evolutionary biology, and probability.

Arvo Muñoz Morán is a Quantitative Researcher working on the Worldview Investigations Team at Rethink Priorities and also does work for Oxford’s Global Priorities Institute. Before that, he was a Research Analyst at the Forethought Foundation for Global Priorities Research and earned an MPhil in Economics from Oxford. His background is in mathematics and philosophy.

Derek is a Philosophy Researcher at Rethink Priorities. He has a PhD in philosophy and has written on topics in metaethics, consciousness, and the philosophy of probability. Before joining Rethink Priorities, Derek worked as the lead web developer for The Humane League.

Romina Giel is the Senior Operations Manager at Rethink Priorities. Driven by her commitment to social justice, she has held several roles at nonprofits dedicated to creating more equitable cities and to ending the abuse of animals raised on factory farms. Prior to joining RP, Romina worked for The Humane League’s Open Wing Alliance, organizing some of the animal welfare movement’s largest international conferences.

Dominika holds a PhD in security studies with specialization in cultural and national security. Dominika is interested in EA community building: she is an organizer for EA Philadelphia and also volunteers with Giving What We Can.

Jessika Mendez-Reppucci is the Controller at Rethink Priorities. Motivated by a passion for problem solving and numbers, she has worked on the finance and operations teams of various New York City nonprofits that address social justice issues and educational inequality. Jessika studied Environmental Studies at NYU and has an MBA in Accounting from Baruch College.

Eda is the Hiring and Recruiting Coordinator at Rethink Priorities. She previously worked in project administration and as a law and policy researcher, including on artificial intelligence governance, network and information security, and biosecurity. Eda qualified as a lawyer in Turkey and holds an LL.M. degree from the London School of Economics, where she specialized in information technology law with her research focusing on AI and data governance, and a law degree from Bilkent University, Turkey.

Courtney is the Lead People and Culture Coordinator at Rethink Priorities. With a knack for intercultural communication and team building, she helps to foster and support a positive and collaborative culture at RP. After almost 20 years in the food and tourism industry, Courtney felt a calling to follow her passion for making a positive impact on the lives of others, which led her to join RP and the EA community where she can learn, grow, and give back. She has a B.A. in Broadcast Journalism with a minor in Women's Studies from Arizona State University.

Lucas is a Finance Coordinator at Rethink Priorities. He combines his financial knowledge with his love of helping others. Prior to joining RP, he spent half a decade working at regional nonprofits and in local government. His experience includes creating a free tax prep program and managing a seven-figure budget. Lucas holds three degrees concentrated in Finance, Accounting, and Business Management. Lucas is passionate about public policy, ethics, and charity entrepreneurship.

Veronica is a Researcher at Rethink Priorities, working on internal organizational design and development. Before joining RP, she advised U.S. federal agencies on human capital practices. Veronica has an MA in Industrial/Organizational Psychology from George Mason University and a BS in Psychology from Indiana University.

Sarah is a Finance Coordinator at Rethink Priorities. She has a passion for global issues, as well as helping nonprofits operate at their highest potential. Prior to joining RP, Sarah worked as a program coordinator at a large economic think tank. She has a M.A. in Nonprofit Management from Regis University, as well as experience bookkeeping for a diverse roster of nonprofit clients.

Julian is the People and Culture Associate at Rethink Priorities. He has an academic background in interdisciplinary social sciences, and prior work experiences in management consulting, research, and the international and multilateral sector. As a first-generation college graduate who grew up in a megadiverse country in the Global South, Julian is committed to addressing historical injustices and building a more socially just and equitable world and ensuring the Earth can support the sustainable flourishing of life in its rich diversity now and into the future. Julian is active in the environmental and ecumenical movements. Julian enjoys learning languages.

Ashley Zebro is the Lead Project Coordinator at Rethink Priorities. Prior to joining RP, she worked on non-profit administration, project management, and event planning at organizations addressing farmed animal welfare and racial equity. She has a B.A. in Theatre Arts from Stony Brook University.

In her role as Senior Communications Strategy Manager, Sarina oversees and supports the management of Rethink's communication and branding projects. Prior to RP, Sarina worked in a variety of roles, which included running a creative agency, designing in the luxury fashion industry, and working in Canadian and American politics. She also holds a BA in conflict studies from the University of Toronto.

Whitney is a Senior Development Officer at Rethink Priorities. Prior to joining RP, she supported institutional and major gifts fundraising at domestic and international education and youth development nonprofit organizations. She has a B.A. from New York University.

As the Senior Communications Coordinator, Rachel writes Rethink Priorities’ newsletters, oversees the website, and leads other projects. Rachel’s diverse experience includes communications, teaching, policy, and grant-writing. Before joining RP, Rachel served as the Director of Resource Development at the Merchavim Institute for the Advancement of Shared Citizenship in Israel. Rachel has an MA in education policy from The George Washington University and a BA in social studies education from Ithaca College.

Hannah is a Development Officer at Rethink Priorities. She previously undertook a six-month Animal Advocacy Careers fundraising placement as Development Lead at Sentient Media. Hannah is also an independent film, audio, and digital arts producer focused on projects that tackle contemporary social, political, and environmental issues.

Henri is a Development Officer at Rethink Priorities. Prior to joining RP, he founded a non-profit in Sweden to fundraise for effective charities. He previously co-founded a for-profit consumer app for charity and worked in the IT sector. He has a B.Sc. in Management from Bocconi University in Milan.

Matthew is the Special Projects Manager at Rethink Priorities. He has worked at the interface between science, technology, and security for more than a decade, with an emphasis on biosecurity and nuclear security. He holds a B.A. from U.C. Berkeley and an M.A. from Georgetown University.

Lara is a Special Projects Associate at Rethink Priorities, helping launch new research projects and run existing ones. She holds an M.A. in Geography from Università degli Studi di Milano. Before joining RP, Lara worked in the private sector for several years. She is interested in the topics of existential risks and improving institutional decision-making.

Kevin is a Special Projects Associate at Rethink Priorities, helping launch and support emerging projects and organizations. He brings more than a decade of experience in strategy, finance, and consulting, and co-founded a corporate venture capital fund. Kevin earned a degree in Business Administration, with Honors, from The Ohio State University.

Cristina is a Special Projects Coordinator at Rethink Priorities. Most recently, she worked as a project manager at the National Pandemic Cohort Network (Germany) and supported the management and operations of several movement building projects in the effective altruism space. She has experience working in the corporate, nonprofit, and public sectors. Cristina holds a M.Sc. in International Logistics and Management from Hamburg University of Applied Sciences.

Marcus is a co-founder and co-CEO at Rethink Priorities, where he leads research and strategy. He's also a co-founder of Charity Entrepreneurship and Charity Science Health, where he previously systematically analyzed global poverty interventions, helped manage partnerships, and implemented the technical aspects of the project. Marcus manages RP’s animal welfare research.

• Publications

Vicky Bond is the Managing Director of The Humane League UK, an organization working to end the abuse of animals raised for food. Vicky graduated as a veterinarian from Liverpool University and holds a Masters in Environment Development and Policy. Through her work, she has persuaded producers on farms and major companies to eradicate the worst forms of farmed animal cruelty. She currently leads The Humane League UK in getting big businesses to commit to welfare policies and works closely with the Open Wing Alliance - a coalition of global organizations, fighting to end the abuse of chickens worldwide.

Abi has served as a U.S. diplomat for over seven years, focusing on emerging technology, geopolitical risks, immigration, macroeconomic stability, cybersecurity, AI, and national security with an emphasis on China. Abi earned an BA from University of Richmond and a Master's of Global Affairs from Yale University.

Elysha is Head of Operations & Strategy at education technology startup Vygo, whose mission is to provide world-class education opportunities to all from the social experience up. Elysha has a broad range of general business skills and experiences, including CEO and senior leadership team oversight, board & investor relations management, launching and scaling new ventures, and business financial and risk management. In her spare time, Elysha likes learning languages and about AI safety.

Nik works at Stanford University as a postdoc in computational biology. His current research applies causal inferential methods to better understand multiomic drivers of complex trait variation in humans. Previously, his PhD work at UC-Davis involved Bayesian phylogenetic methods development. He also serves on the board of directors at the Wild Animal Initiative. In his free time, he likes programming, exercise, photography, and outdoor adventure.

JueYan is a philanthropic advisor and makes grants across cause areas. Previously, he earned-to-give as a hedge fund manager for a decade. JueYan also sits on the boards of Family Empowerment Media and Suvita, two global health charities he helped to seed fund. He chairs the investment committee at Founders Pledge, advises Charity Entrepreneurship, and is a speculation grantor for the Survival and Flourishing Fund. In his free time, JueYan enjoys cooperative board games, fine dining, and relative value analysis.