Sean's Bio
Sean Coit joined Cornerstone in March 2026, expanding the firm’s public affairs footprint and bringing more than 15 years of experience in strategic communications. He currently serves as Principal, supporting clients in a variety of issue areas.Sean previously led his own firm, Swivel Public Affairs, where he advised corporate, government and nonprofit clients on strategic communications, media relations, government relations and crisis communications. He also advised and supported congressional and statewide campaigns in Pennsylvania.
Prior to this, Sean held senior leadership roles with Comcast Spectacor, including Senior Vice President of Public Affairs, where he oversaw all internal and external communications for the company’s sports, entertainment and other properties. This included the Philadelphia Flyers, Xfinity Mobile Arena, a leading global esports franchise and major mixed-use development project.
Sean began his career spending more than a decade on Capitol Hill, most recently as Senior Advisor and Communications Director to U.S. Senator Chris Coons (D-DE), where he led communications strategy and served as the Senator’s primary spokesperson. Previously, he served as Press Secretary for Sen. Patty Murray (D-WA) and Special Assistant for Rep. Gabrielle Giffords (D-AZ). He also worked on several high-profile Senate campaigns, including those for Sens. Jeanne Shaheen (D-NH), Chris Murphy (D-CT) and others.
He earned his B.A. from Saint Joseph’s University and currently resides in Philadelphia, PA.
