Posted Jul 9, 2026

Senior Vaccination Researcher

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GiveWell is a research organization that identifies and funds cost-effective giving opportunities, focusing on global health and well-being. Our work is funded by tens of thousands of donors who rely on our research to inform their giving. We’ve grown from directing $1.5 million in 2010 to directing more than $400 million in 2025.

Summary

GiveWell is seeking a Senior Vaccination Researcher to help us direct tens of millions of dollars annually to the most cost-effective vaccination programs that we can find. You will have an outsized influence on our funding decisions and help us save and improve lives on a global scale.

Our vaccination grantmaking is focused on increasing coverage of routine immunization in children under the age of two in areas with high burden of vaccine-preventable disease. This has included supporting targeted outreach and mobile vaccination, demand-side incentives, and support for malaria vaccine rollout. In the future, we may expand into new areas such as campaigns, subsidizing vaccine procurement, supply chain support, surveillance and outbreak response, and R&D for vaccines or vaccine delivery technology. Vaccination is one of our fastest-growing areas, from $12 million in 2024 to $50 million in 2025 and more than $70 million expected in 2026.

As a Senior Vaccination Researcher, you’ll create and lead ambitious research agendas related to our portfolios of work and answer complex questions that will inform GiveWell’s grantmaking decisions. The researchers on our team combine rigorous evidence review, cost-effectiveness modeling, and thoughtful judgment.

We’re open to a wide variety of professional development pathways depending on your preferences and our needs.

The role

You will be joining a small grantmaking team to contribute to our ambitious research agenda on vaccination. You’ll sift through the countless questions we could try to answer, and home in on those that matter most. You’ll also communicate externally about your work and mentor and advise other researchers on the team.

You will shape a research agenda that brings rigor and creativity to the thorniest questions the GiveWell vaccination team faces. Your work will combine empirical evidence review and critical synthesis, cost-effectiveness modeling, discussions with subject matter experts, understanding of the broader context, and your own judgment.

What you might work on in your first year:

The Senior Vaccination Researcher will help shape a major annual grantmaking portfolio, own grant investigations end-to-end (from research question through grant recommendation), and represent GiveWell to external counterparts. You'll have significant latitude to propose new areas of work.

Team structure

Our research department has over 60 people, and is currently organized into seven teams:

There are currently four people on our vaccination team.

Team values

We think our research team has unique qualities:

About you

We expect the Senior Vaccination Researcher to have

We expect that people with the soft qualities below will be the most successful and happy on our team. This isn’t a full list, but hopefully it conveys the gist of our team’s professional personality:

If you’re interested in working on GiveWell’s research team but don’t have vaccination expertise, consider applying to our generalist Senior Researcher role.

The details

Miscellaneous details:

About GiveWell

GiveWell is dedicated to finding and funding outstanding giving opportunities in global health and development, sharing the full details of our analysis with everyone for free. Our giving funds enable donors to contribute to the most impactful and cost-effective programs our researchers identify.

Since 2007, we’ve directed over $2.6 billion to cost-effective programs and interventions. In the last two years, we’ve made more than $500 million in grants. GiveWell is one of the world’s largest private funders of global development efforts, and we estimate that the funding we’ve directed will save more than 340,000 lives.

GiveWell is most well-known for recommending a small number of Top Charities, which currently support seasonal malaria chemoprevention, antimalarial nets, vaccine incentivization, and vitamin A supplementation. However, most of our research capacity is devoted to finding cost-effective opportunities outside of those programs.

GiveWell grants have:

We never take for granted that GiveWell’s work is good for the world. We make our reasoning public and transparent so others can challenge it (sometimes we even pay people to point out our errors). We go to unusual lengths to check our assumptions and assess our impact, including funding research and external analysis to address our uncertainties and insisting that our grantees conduct rigorous monitoring and evaluation. We change our minds when the evidence demands it.

Additional information

We don’t want to miss candidates that could do great things at GiveWell. Practically, that means a GiveWell staff member reviews every application carefully, considering the whole picture of your background and potential. If you’re on the fence about applying because you meet some but not 100% of our preferred qualifications (some studies suggest this hesitation is especially common for women and people of color), we encourage you to apply anyway.

GiveWell is an Equal Employment Opportunity employer by choice. At minimum, this means that we comply with all federal, state, and local EEO and employment laws. Beyond the requirements of those laws, we value our team’s diversity in all respects, and we desire to maintain a work environment free of harassment or discrimination—we want our team members to thrive at GiveWell. If you need assistance or an accommodation due to a disability, contact us at [email protected]. We will consider employment for qualified applicants with arrest and conviction records.

By submitting an application, you acknowledge that you have read and consent to GiveWell’s Privacy Statement for Applicants. By completing an application exercise, you acknowledge and assent to ’s Work Trial Policy.

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