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Breen Sullivan

CEO and director at T4F.

ExecutiveDirector
Updated Nov 10, 2026·Latest SEC filing Apr 30, 2026·Suggest an edit

About Breen Sullivan

Breen Sullivan is CEO and director at T4F.

Experience

This experience comes from Breen Sullivan's profile and from SEC filings. For roles taken from filings, the years are when the filings name Breen Sullivan in the role, so the role may have started earlier or lasted longer.

Marble Collective Current
Founding Member
2023 – Present
T4F, Inc. Current
Founder & CEO (2019 – Present)
Director
2019 – Present · Chatham, NJ
A platform helping startup founders find advisors, board members and investors.
Watermark
Chief Administrative Officer
2018 – 2020
Known
Head of Legal and Business Affairs
2016 – 2018
Bright Power, Inc.
General Counsel
2013 – 2016
Kilpatrick Townsend & Stockton LLP
Intellectual Property Associate
2008 – 2012
GE
Oil & Gas Litigation Team
2008 – 2009
New York Civil Liberties Union
Law Clerk
2006
Casablanca American School
Language Arts/Theater Teacher-Intern
2001 – 2002

Sources

  1. SECT4F, Inc. Form D, filed Apr 30, 2026