Jonathan D. Mariner

Director since 2019

Jonathan’s financial background, entrepreneurial interests and experience in strategic investments, acquisitions and forecasting are among the reasons he was added to our board.

He is a private investor and entrepreneur who retired after 23 years in professional sports. Jonathan previously served as chief financial officer (CFO) for the Office of the Commissioner of Major League Baseball, where he led the League’s accounting, treasury and budgeting functions; completed more than a dozen franchise purchase and sale transactions; and helped create the League’s strategic investment fund.

Prior to his position at Major League Baseball, Jonathan was the CFO for the Florida Marlins Baseball Club, Florida Panthers Hockey Club and Dolphins Stadium. He was also previously a director for Ultimate Software, which ranked #8 on Fortune’s 100 Best Companies to Work For list for 2019.

He is currently the founder and president of TaxDay, LLC, a private software firm that creates apps designed to help users keep track of their multi-state travel. He is also serving on an interim basis as the Head of Regional Sports Networks for The Walt Disney Company pending the networks’ sale.

Jonathan has a Bachelor of Science in accounting from the University of Virginia and an MBA from the Harvard Business School.