Rocket Companies, the Detroit-based holding firm of Rocket Mortgage and Rocket Homes, appointed Jonathan Mariner (pictured) to its board of directors. He will also be chairperson of the board’s audit committee.

Mariner is the founder and current president of TaxDay, LLC, a private software firm. He has also served as chief financial officer and chief investment officer of Major League Baseball, and CFO of the Florida Marlins, the Florida Panthers, and Dolphins Stadium.

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In addition to his leadership positions, Mariner served as an independent board member for many prominent enterprises – including Tyson Foods and McGraw Hill Education. He is also a senior adviser to Overtime Sports, a new sports broadcasting network focused on young, digital-native sports fans.

“Serving on the board of Rocket Companies is a great honor,” said Mariner. “I look forward to collaborating with my fellow directors and bringing my background and perspective to help impact the outcome.”

“Jonathan has an incredible track record of driving great results for the businesses and teams he has led” said Jay Farner, chief executive officer of Rocket Companies. “We look forward to leveraging his experience and guidance to build on the momentum of our longstanding success.”

Mariner’s appointment comes as Rocket Companies recently announced record-breaking third quarter earnings, having generated $6.6 billion of net income through the first three quarters of 2020.