Breen Sullivan

Breen Sullivan

Founder, The Fourth Floor, The Fourth Floor
|Breen Sullivan

Breen Sullivan is the Founder of The Fourth Floor, a Market Network on a mission to close the gender power, wealth, and funding gap by diversifying boardrooms and cap tables. The Fourth Floor matches startups and companies to board-ready women in a trusted, efficient and cost-effective way to disrupt the traditional board search process and overcome systemic barriers that have kept women out of the board candidate pipeline. The Fourth Floor also matches under-represented founders and fund managers with women angels and LPs because women invest differently than men, and that difference will unlock a missed opportunity worth trillions of dollars.

The Fourth Floor online community and on-demand talent marketplace includes a Board Seat Exchange, Private Investment Club, Job Board and Membership Community. The Fourth Floor along with approximately 800 ecosystem companies, 1,500+ board-ready women and 100+ women-led funds and investors is breaking the systemic barriers that contribute to the inequities in the startup ecosystem and company boardrooms.

Breen is a C-Suite executive with 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 GC, Breen has worked with startup and high growth companies for over 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.

You can follow Breen and The Fourth Floor on LinkedInInstagram, Twitter, and Facebook.

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