Brendan Bulik-Sullivan is a Google Ventures partner with a Ph.D. in statistical genetics who previously led machine learning at Gritstone Oncology, where he personally built ML models for personalized cancer therapeutics rather than coming from traditional finance backgrounds. His academic work developing foundational statistical genetics methods like LD Score regression at the Broad Institute, combined with his hands-on experience as a machine learning operator in immuno-oncology, gives him an unusually technical foundation for evaluating data-heavy biotech companies.