Senior Partner at YL Ventures
View Live Interactive Profile →John Brennan was Senior Partner at YL Ventures, where the firm's own site says he oversaw its core U.S. investment processes and portfolio value-add work from Silicon Valley and managed its Venture Advisory Board of more than 120 cybersecurity experts. Before YL Ventures he held roles at Data Collective (DCVC), OCA Ventures and Horsley Bridge Partners, and began his career as a consultant at Accenture. He holds an MBA from the University of Chicago and a B.S. from Trinity College in Connecticut. In December 2025 he launched Holly Ventures, a solo-GP cybersecurity seed fund, and is no longer listed on the YL Ventures team page.