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Kieran Greig

Kieran Greig

Driving strategy and impact in effective altruism and animal welfare

Melbourne, Victoria, Australia

Summary

Kieran Greig is a leading figure in the effective altruism (EA) movement, particularly focused on strategy, research, and resource allocation for high-impact causes. His career demonstrates a clear progression within EA organizations, starting with foundational analysis at Charity Science and Charity Entrepreneurship, and moving into strategic leadership roles at Rethink Priorities and the EA Animal Welfare Fund. rethinkpriorities+2
He possesses deep expertise in animal welfare advocacy, having worked as a researcher and board member for Animal Charity Evaluators, consulted for Farmed Animal Funders, and managed and chaired the EA Animal Welfare Fund. His work includes systematic analysis of interventions, promoting plant-based alternatives, and investigating the welfare of neglected animals like farmed fish and invertebrates. rethinkpriorities+3
As Chief Strategy Officer at Rethink Priorities, Kieran is instrumental in guiding the organization's approach to understanding and navigating uncertainty in doing good. He advocates for skepticism, transparency, and data-driven decision-making, and has contributed to frameworks like the Moral Parliament Tool and Cross-Cause Effectiveness Model to assist philanthropists in aligning giving with values and managing moral uncertainty. rethinkpriorities+2

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