Overview
Mark Ballister serves as Vice President of Cybersecurity & Chief Information Security Officer (CISO) at Montefiore Health System[1][3]. Ballister's work has centered on helping large, complex institutions govern cybersecurity and technology risk in environments where regulatory expectations, operational continuity, and institutional trust matter deeply[2]. Prior to joining Montefiore in April 2024[3], Ballister held the position of Associate Vice President & Chief Information Security Officer at the University of Rochester from August 2018 to April 2024[4]. Ballister's earlier career included roles at Paychex, Inc., spanning from June 2000 to August 2018, progressing through positions including Security Administrator, Vulnerability Assessment Manager, Security Operations Manager, and Security Intelligence and Response Manager[5][6][7][8][9][10]. Ballister holds a Bachelor of Science in Finance from SUNY Brockport[11] and completed the ASIS Program for Security Executives at The Wharton School[12].
Profile introduction
My work has centered on helping large, complex institutions govern cybersecurity and technology risk in environments where regulatory expectations, operational continuity, and institutional trust matter deeply. I have served in senior cybersecurity leadership roles across academic health systems, higher education, and publicly traded financial services organizations. In each setting, I’ve operated within multi-entity, federated structures and partnered closely with executive leadership and boards during periods of audit findings, regulatory remediation, acquisitions, and enterprise change. A…
Career history
- Vice President of Cybersecurity & Chief Information Security Officer (CISO)Apr 2024 to presentMontefiore Health System
- Associate Vice President & Chief Information Security Officer (CISO)Aug 2018 to Apr 2024University of Rochester
- Security Intelligence and Response ManagerApr 2015 to Aug 2018Paychex, Inc.
- Security Operations ManagerMay 2006 to May 2015Paychex
- Vulnerability Assessment ManagerMar 2004 to May 2006Paychex
- Secure Data Transfer SupervisorFeb 2003 to Mar 2004Paychex
- Security AdministratorJun 2000 to Feb 2003Paychex
- Security AdministratorMar 1999 to Jun 2000Paychex
Education
- Bachelor of Science - BS, Finance at SUNY Brockport1992 - 1996Education
ASIS Program for Security Executives2013 - 2014The Wharton School
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