Jonathan Mariner has served as Legacy EJY’s Chief Administrative Officer and as a member of its board of directors since December 2020. Jonathan Mariner also served as Legacy EJY’s Chief People Officer from December 2020 to January 2022. Prior to joining Legacy EJY, Jonathan Mariner served as the founder and President of TaxDay LLC, a mobile residency tax tracking application, since April 2016. From March 2002 to May 2016, Jonathan Mariner served in executive leadership roles at Major League Baseball, including as Chief Investment Officer from January 2015 to May 2016 and as Executive Vice President and Chief Financial Officer from March 2002 to December 2014. Prior to that, he served as Executive Vice President and Chief Financial Officer of the Florida Marlins from February 1992 to December 2000. He serves on the board of directors of Rocket Companies, Inc., Tyson Foods Inc., McGraw-Hill Education, and various other private companies and organizations. Jonathan Mariner also served on the board of directors of Ultimate Software Group Inc. and FM Global Insurance, Inc. Jonathan Mariner holds a B.S. in Accounting from the University of Virginia and a M.B.A. from Harvard Business School; and is a former Certified Public Accountant.