Breen Sullivan

Breen Sullivan is the Founder of The Fourth Floor, a new kind of tech-enabled community for women founders, board candidates and investors on a mission to drive systemic change by getting women onto the boards and cap tables of women-led startups.

Breen is a C-Suite executive with concentrated experience in operations, commercial contracting, human resources and employment matters; organization, corporate and deal strategy; Board of Director communications and responsibilities; privacy and risk management; financial matters, and occasionally novel challenges. As a career general counsel, Breen has worked with startup and high growth companies for nearly a decade, specializing in technology, SaaS, energy efficiency and data science.

Breen and The Fourth Floor have been featured by Forbes, Corporate Counsel Magazine,, The American Lawyer, Above The Law, Women On The Record Podcast, and Her CEO Journey: The Business Finance Podcast for Women Entrepreneurs. She holds a JD from Tulane, and a BA from Yale University. She has earned certificates and completed coursework at Boalt Hall, Berkeley, Universita Degli Studi di Firenzi, and Humboldt-Universität Zu.

Breen also personally invests in startups and enjoys serving as a Board Advisor to startup and growth companies.