Our Team

Dr. John McCarthy

CEO

ChCSP · PhD (Brun) · BSc (Hons) · MBCS

Dr John McCarthy founded Oxford Systems and has led the company as CEO since 2003. He specialises in airport cyber security strategy and leads the cyber security review team for ACI World’s APEX programme.

Christine Smith

Financial Director

With Oxford Systems since 2003, Christine brings decades of financial management experience across multiple sectors, combining astute financial judgement with a practical understanding of business priorities.

Sajjan Nehal

Penetration Tester

Sajjan combines penetration testing and bug bounty research with a background in development and system administration, assessing web applications, APIs, mobile apps, cloud and Active Directory environments.

Sarah Gooding

Sales Director

Sarah brings over 25 years of experience connecting business leaders, drawing on a broad commercial background to support face-to-face dialogue, open discussion and collaboration across diverse sectors.

Frantisek Kotacka

Penetration Tester · Ethical Hacker

Frantisek is a penetration tester, ethical hacker and cybersecurity consultant. His credentials include OSCP and SCS‑C01.