Founder of Taxday LLC, Jonathan Douglas Mariner currently occupies the position of President at Taxday LLC and Director & Chief Administrative Officer at Enjoy Technology, Inc., Director, Chief Administrative & People Officer at Enjoy Technology LLC (a subsidiary of Enjoy Technology, Inc.).

He is also on the board of 10 other companies.

In the past he held the position of Chief Operating Officer at Charter Schools USA, Inc., Chief Investment Officer & Executive VP at MLB Advanced Media LP, Chief Financial Officer, Director & EVP at Major League Baseball Blue, Inc., Chief Financial Officer & Executive Vice President of Miami Marlins LP, Chief Financial Officer for Florida Panthers Hockey Club Ltd., Chief Financial Officer at Dolphins Stadium, Chief Financial Officer & Executive VP of Florida Marlins and Head-Regional Sports Networks at The Walt Disney Co.

He received an undergraduate degree from the University of Virginia and an MBA from Harvard Business School.