Katrinka B. McCallum joined the ACI Worldwide Board in 2024, serves on the Audit and Corporate Governance Committees, and is a designated Audit Committee financial expert. She held a variety of leadership roles over more than a decade at Red Hat, including Vice President of Customer and Product Experience, and earlier was Chief Operating Officer and a director of Micromuse Inc. and a Senior Auditor at Deloitte & Touche LLP. She also serves as a director of Intrusion, Inc.