Alexander Berger is the CEO of [[Open Philanthropy]], the largest funder in the [[Effective Altruism]] ecosystem, which has deployed billions of dollars across global health, biosecurity, AI safety, and criminal justice reform. Under Berger's leadership, Open Philanthropy has become one of the most influential philanthropic organizations shaping [[AI Safety]] policy and research funding. His position makes him a central node in the [[TESCREAL]] network's institutional infrastructure.