Mairtin O'Sullivan

Security Engineer

Máirtín O'Sullivan is a Security Engineer in the application security team at Synthesia, building AI-powered tooling and agentic workflows that help engineering teams ship securely at scale.

A seasoned security leader and individual contributor, he has held senior roles at Stripe, AWS, and Qualcomm, bringing over two decades of experience across product security, incident response, and risk management.

Having led security in many fast-scaling organisations, Máirtín is passionate about how AI is changing the way application and product security teams operate, and what that means for the evolving role of the security engineer.

Blog posts by Mairtin O'Sullivan

Security

Security Context: Onboarding Agents to Your AppSec Team

How thinking like an engineering manager helped us make AI agents actually useful for security review.

Mairtin O'Sullivan

June 23, 2026](/content/post/onboarding-agents-to-your-appsec-team/index.html)