Professional headshot of David Byrnes, Executive Vice President, CFO and Treasurer at Sphere Entertainment Co

David Byrnes

Executive Vice President, Chief Financial Officer and Treasurer

As Executive Vice President, Chief Financial Officer and Treasurer of Sphere Entertainment Co., David Byrnes works closely with Sphere Entertainment’s executive management team to support the long-term direction of the Company. In this role, he provides strategic financial insight on all facets of the business, from strategy and business development to overseeing the Company’s financial matters, including all planning and analysis. In addition, he plays an instrumental role in the growth and execution strategies for Sphere, a next-generation entertainment medium that is redefining the future of live entertainment. The first Sphere venue opened in Las Vegas in September 2023.  

Mr. Byrnes is a seasoned executive with over 30 years of finance experience. Prior to his current role, Mr. Byrnes served as Executive Vice President and Chief Financial Officer of Madison Square Garden Entertainment Corp. He joined MSG Entertainment in January 2022 from ViacomCBS, where he served as Executive Vice President of Corporate Finance. In this role he was responsible for the company’s budgeting, forecasting, and long-range strategic planning processes. He joined CBS Corporation in 2008 before the company merged with Viacom in 2019. His prior roles with CBS Corporation include as Senior Vice President, Controller and Chief Accounting Officer, as well as leadership positions in Division Finance; Internal Audit; Technology Finance; and Corporate Development functions. Prior to joining CBS, Mr. Byrnes held various leadership positions over more than five years at Automatic Data Processing, including as Divisional Chief Financial Officer and Vice President of Financial Reporting and Policy. He began his finance career in the audit practice at KPMG, where he spent 11 years.

Mr. Byrnes received his B.B.A. from Pace University, and an MBA from the Columbia Business School. He is also a Certified Public Accountant.