radiant - Principal/Staff Security Engineer

UK+ Equity2w ago

In Office Principal EMEA Cybersecurity Security Engineer Principal Kubernetes Reporting Governance

Requirements

• Strong Kubernetes experience, with the technical depth to investigate and resolve issues directly. • Experience auditing firewall policies and network access controls. • Experience conducting or coordinating penetration testing. • Comfortable maintaining and operating security tooling and environments on an ongoing basis. • Strong written communication skills, given the solo nature of the role. • Experience operating as the sole security engineer, or within a small security team. • Network engineering experience or strong networking fundamentals. • Background in data centre environments, or related infrastructure environments. • Experience with AI security specifically. • Exposure to compliance frameworks such as ISO 27001 or SOC 2, and an understanding of how technical controls map to audit evidence.

Responsibilities

• SECURITY TESTING & AUDIT: • Audit firewall policies and network access controls across the estate. • Conduct internal penetration testing, working alongside our external penetration testing partners. • Build a penetration testing strategy and cadence that improves accuracy and coverage over time. • Identify and help remediate security gaps found through testing and audit. • PRODUCTION ESTATE & TECHNICAL DEPTH: • Build and maintain a deep, working understanding of our production environment, including Kubernetes clusters, network architecture and access controls. • Investigate technical issues directly and dig into root cause, rather than relying on reported findings alone. • Support the VP Infosec on controls testing across the Production Estate. • ACCESS & ENVIRONMENT MANAGEMENT: • Own and maintain SSO and systems access configuration. • Build and maintain penetration testing environments, including small Kubernetes clusters as needed. • Maintain the tooling and infrastructure supporting security testing. • Work proactively across engineering teams to avoid becoming a single point of knowledge or failure. • Document processes, findings and configurations so knowledge is shared, not siloed. • Partner with the Head of Security Operations on shared governance, risk reporting and security testing.

Benefits

• Build Radiant's internal penetration testing capability at a moment when our security and compliance obligations are scaling fast, as a Brookfield portfolio company moving into owned data centre operations. • Work directly with our VP Infosec and Head of Security Operations, protecting both our corporate and production estates. • Be part of a team whose work protects the infrastructure powering sovereign and enterprise AI deployments globally. • Develop your career in a Brookfield backed company with resources, mentorship and genuine growth opportunities.