Head of Security Operations

Radiant is redefining how AI infrastructure is built. We design and operate AI-native infrastructure platforms engineered for sovereignty, performance, and scale - powering GPU-native workloads, multi-tenant control planes, and high-performance AI systems for the most demanding environments. We are building purpose-built AI infrastructure from powered land, to compute, to software.

As we scale our operations and deploy capital into the next generation of AI infrastructure, we are looking to expand our security team with leaders who can combine technical strength with execution excellence and are driven to build.

Radiant was established by Brookfield, a leading global alternative asset manager with over US$1 trillion of assets under management across real estate, infrastructure, renewable power and transition, private equity and credit. Brookfield's global relationships, investment expertise and access to long-term institutional capital provide Radiant with a differentiated platform from which to develop, finance and operate AI infrastructure assets. This combination of entrepreneurial execution and institutional sponsorship enables Radiant to pursue large-scale GPU and AI infrastructure opportunities globally.

Location: London, UK | Employment Type: Full-time, Permanent | Reports to: Chief Customer Officer

We're looking for a Head of Security Operations to build Radiant's security function from the ground up. This is a founding role where you’ll help to define the strategy, tooling and operating model for security across our data centres, compute platform and network fabric.

You will also represent Radiant's security posture directly to customers and prospects who are evaluating us for their AI workloads. You will work closely with our Commercial, Compliance and Engineering teams, coordinating on shared risk reporting, security testing and audit evidence.

Security Strategy & Leadership:

Customer-Facing Security & Trust:

Data Centre & Infrastructure Security:

Engineering Partnership:

Governance, Testing & Collaboration:

Incident Response & Resilience:

• Hands-on data centre security expertise, covering physical, environmental and infrastructure-layer security, gained in large-scale, high-availability environments.
• Experience building a security function or SOC from the ground up, without an inherited team or toolset.
• Experience representing security directly to customers and prospects, including at executive level.
• Strong stakeholder management skills across engineering leadership without relying on formal authority.
• Experience working alongside a peer GRC/Infosec function with clearly defined but collaborative boundaries.
• Experience owning incident response and resilience programmes at scale.
• Experience securing AI-native, GPU-accelerated or HPC infrastructure specifically.
• Background in telecom, hyperscale cloud or colocation data centre operators.
• Familiarity with sovereign or regulated infrastructure security requirements.
• Experience with customer-facing security assurance processes such as RFPs, due diligence and trust centers.

• Build and own a new function at a rapidly scaling AI infrastructure business, with a genuine mandate to shape it.
• Work directly with Radiant's Customer Office leadership and C-suite, with real influence over how the company secures and sells its platform.
• 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.