Presently, Denis J. O'Leary holds the position of Non-Executive Chairman for Fiserv, Inc.

He is also on the board of CrowdStrike Holdings, Inc., The Warranty Group, Inc., CrowdStrike, Inc. and Ventiv Technology, Inc.

In his past career he held the position of Chief Information Officer & Finance Director at ChaseCom LP, Chief Information Officer & Treasurer at JPMorgan Chase & Co., Senior Advisor at The Boston Consulting Group, Inc., Managing Partner at Encore Financial Partners, Inc., Chairman for NYCE Payments Network LLC and Director at Intel Security Group.

He received an undergraduate degree from LaSalle University, an undergraduate degree from the University of Rochester and an MBA from The Leonard N Stern School of Business.