I’m currently working with a leading AI infrastructure business that is scaling its global network engineering function. They are looking for a Director of Network Security to define security strategy, build a team and protect large-scale production networks supporting AI and high-performance computing. This is an opportunity to shape network security from the ground up across a rapidly growing AI cloud platform, spanning data centre GPU fabrics, WAN, backbone, peering and facilities networks.

The Role

Own network security strategy and roadmap across data centre fabrics, WAN, backbone, internet and peering infrastructure

Lead network security architecture, including segmentation, tenant isolation, firewall policy, zero-trust access and DDoS protection

Oversee security operations, threat detection, incident response and vulnerability management across production networks

Establish security standards and ensure network designs and infrastructure changes meet security requirements

Drive security-as-code, embedding policy, segmentation and compliance into software, CI/CD pipelines and automated enforcement

Lead the development of security automation and tooling, including applying AI to threat detection, triage and investigation

Partner with corporate security, compliance and customer teams on audits,



risk management and security requirements

Build, lead and develop a team of network security engineers and architects

Desired Qualifications

Extensive experience leading network security across large-scale data centre, cloud, carrier or hyperscale production environments

(critical)

Deep expertise in firewalls, network segmentation, zero-trust access, multi-tenant isolation and DDoS protection

Strong understanding of BGP, OSPF or IS-IS, VXLAN, EVPN and MPLS, including routing security such as RPKI

Solid software engineering experience delivering policy-as-code, security automation and tooling using languages such as Python or Go

Experience applying AI and automation to security operations, threat detection or incident investigation

Proven experience building and leading security teams, managing incidents, risk and audits

Familiarity with security frameworks such as NIST, ISO 27001, SOC 2 and IEC 62443

Experience securing AI infrastructure, high-performance computing or industrial OT networks would be highly regarded

Strong communication skills, with the ability to articulate technical risks and trade-offs to engineers and executive stakeholders

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📌 Director, Network Security (AI Infrastructure) (Haymarket)
🏢 Capital Executive Search
📍 Haymarket