About us 2026

NDAY Security – Our Team
The Team

Leadership & Advisors

Decades of offensive security expertise, from white-hat hacking to enterprise defense.

Core Team
Mark Whitehead
Mark Whitehead
Co-Founder

20+ years in offensive security leadership across the Big 4, defense contractors, and high-growth startups. Led 150 Testers, 10,000+ penetration tests and millions of vulnerability scans. MSc, CISSP & Harvard Business certified.

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John Cartrett
John Cartrett
Co-Founder

20+ years at top offensive security firms including Raytheon, SecureWorks, and Trustwave SpiderLabs. Directed nearly 100 full-scope red team operations, 1,000 of penetration tests, and specializes in clandestine-style engagements.

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Advisory Board
Jack Johnson
Jack Johnson
Board Advisor

CEO of Jack Johnson & Associates. Former first CSO at the Department of Homeland Security and 20-year U.S. Secret Service veteran. Previously a Partner at PwC U.S. Public Sector leading Defense.

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Nolan Clifford
Nolan Clifford
Board Advisor

GTM & Sales Advisor with 25+ years in cybersecurity leadership. Former Founder/CEO of Information Security Solutions (successful acquisition), former Deloitte Partner, and retired Naval Cryptology Officer. CISSP.

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Rusty B.
Rusty B.
Board Advisor

Distinguished Former Chief Technology Officer for the Central Intelligence Agency.

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Gary M.
Gary M.
Board Advisor

Senior Advisor at Oliver Wyman and former CISO of AIG, where he led the global cybersecurity risk program. Previously served as Chief Security Officer at USAA. Faculty at IANS Research and 25-year U.S. Air Force officer, with prior experience at Deloitte.

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Kory D.
Kory D.
Board Advisor

Chief Security & Trust Officer at LevelBlue, leading risk management, corporate resilience, digital trust, and strategic growth. Prior to this role, he held leadership positions at IBM.

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Mike M.
Mike M.
Board Advisor

Michael McCord is a cybersecurity veteran and Agentic AI researcher who previously led global incident response for Citigroup’s Cyber Security Fusion Center. Formerly served as a Senior Researcher at Carnegie Mellon’s SEI CERT. Famously credited with the Tor anonymity defeating "Traffic Confirmation" vulnerability.

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NDAY Security

AI-Powered Offensive Security

Named after the "n-day" vulnerability, NDAY fortifies the human element of cybersecurity by addressing known vulnerabilities before they become liabilities. Our AI-infused platform, AttackN, takes a proactive approach — reducing breach risk, transforming users into informed defenders, and freeing CISOs to allocate resources where they matter most.