About Onion Security — Cyber Security Consultancy in the UK

Why Choose Onion?


Onion Security Ltd is a London-based cybersecurity consultancy with over two decades of experience serving the financial sector. Our CISSP-certified professionals have partnered with global investment firms, currency management organisations, and innovative start-ups to enhance their security posture.

We understand the unique challenges faced by technology teams and act as an extension of your organisation, providing tailored solutions to ensure operational continuity and data protection.

Mark Pagdin, CISO & Founder of Onion Security Ltd.

Guiding your business to continuous compliance

Our Trusted Partners

Vanta
GeakMinds Inc
PentestPeople
VeracIT