John Zillmer is the Chief Executive Officer at Aramark, a role he has held since 2019. He also serves as Chairman of the Board for CSX and is a board member at Ecolab.

Prior to his current tenure as CEO, Zillmer had a significant history with Aramark Corporation, where he worked for over 20 years. He also served as Chairman and CEO of Allied Waste Industries from June 2005 to December 2008. Additionally, he spent three years and three months at Univar.

Zillmer holds an MBA in Business.