Senior Penetration Tester (CHECK) – Cloud & Web Security

Instil is seeking a Senior Penetration Tester with CHECK to join our growing team in Belfast. You will lead hands-on engagements across infrastructure, cloud, web, and mobile applications for diverse clients, delivering high-quality findings and remediation guidance.

This role is hands-on, with mentoring of junior testers, contributing to our methodologies, and helping clients strengthen security postures. If you're passionate about offensive security and ready for varied, challenging projects,