Cyber TOP100 LEADERS H2 2026 | Page 67

Gleb Reznik

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TOP

Gleb Reznik

Title: Chief Information Security Officer Company: American Express Industry: Financial Services
100 LEADERS
Gleb is CISO at American Express, overseeing global cyber defence and technology risk management across enterprise systems. Bringing extensive financial security leadership from previous roles at JPMorgan Chase Consumer Banking, Synchrony and Capital One, Gleb has spearheaded Zero Trust architectures, enterprise cloud security migrations and behavioural insider threat analytics. Gleb champions cybersecurity workforce diversity through board service and actively advises emerging venture capital cybersecurity startups. cybermagazine. com 67