Breen Sullivan

Founder, The Fourth Floor

Breen Sullivan Breen Sullivan

Breen Sullivan is the Founder of The Fourth Floor, an innovative ecosystem reimagining the board room, investment and how we support female entrepreneurship. Women have a hard time getting board seats and they also have a hard time raising money to scale their companies. To solve for this, the Fourth Floor brings female founders and professionals together to increase the number of women on boards, be more competitive fundraisers, and create wealth for entrepreneurs and investors.

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.


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