Biography

John R. (Jack) Hartung has been a member of the Portillo’s Board of Directors since January 2025. Mr. Hartung currently holds a senior advisory role at Chipotle Mexican Grill, where he most recently served as President and Chief Strategy Officer through May 2025. Since joining Chipotle in 2002, Mr. Hartung held several key leadership roles, including Chief Financial and Administrative Officer, overseeing all finance and accounting functions as well as supply chain, strategy, and safety and asset protection. Over the past 20+ years under Mr. Hartung’s financial leadership, Chipotle expanded significantly to more than 3,700 restaurants today across the United States, Canada, the United Kingdom, France, Germany, Kuwait and Dubai. Mr. Hartung was named ‘CFO of the Year’ by Orange County Business Journal and Best CFO in the restaurant category by Institutional Investor.

Prior to Chipotle, he spent almost 20 years at McDonald's, where he held a variety of management positions, including Vice President and Chief Financial Officer of its Partner Brands Group.

In addition to serving on Portillo’s Board of Directors, Mr. Hartung serves on the Board of Directors for Tesla, Inc., The Honest Company, Inc. and ZocDoc, Inc. He has a Bachelor of Science degree in accounting and economics, as well as a Master of Business Administration, from Illinois State University.

Favorite Menu Item: Italian Beef with Hot Peppers