Cyber Security Lead

Cyber Security Architect & Engineering Lead

Hybrid / Remote: Just 1 day per month in the London office

Leading UK Professional Services Firm

Ready to take the technical lead on security?

We're working with a leading UK professional services firm that is making a significant investment in its internal cyber security capability.

They're looking for a Cyber Security Architect & Engineering Lead to play a key role in shaping the firm's future security architecture and engineering capability.

This is a senior, hands-on position where you'll have the opportunity to design, build and improve security, rather than simply advise on it. You'll work across cloud, identity, data, endpoints, applications and networks, while also helping the business securely adopt AI and emerging technologies.

What You'll Be Doing

You'll take technical ownership across a broad security landscape, including:

Designing and implementing security architecture across Microsoft 365, Azure, Entra ID, Defender XDR, Sentinel and Purview
Building modern security controls around Zero Trust, secure-by-design and automation
Leading architecture reviews and threat modelling for major projects and new technologies
Taking a lead role in the secure adoption of Microsoft 365 Copilot, AI agents and custom AI applications
Improving security monitoring, detection engineering and incident response
Supporting complex and high‑severity security incidents alongside internal teams and external SOC partners
Strengthening vulnerability and exposure management using threat intelligence, exploitability and business risk
Automating security processes using Python, PowerShell, Logic Apps, Azure Functions and APIs
Supporting technical controls and evidence for ISO 27001 and Cyber Essentials Plus
Acting as a senior security SME and helping technology teams adopt better security engineering practices

What We're Looking For

This would suit an experienced Security Engineer, Security Architect or senior technical security professional who wants genuine ownership and influence.

Ideally, you'll bring:

Strong hands-on experience within a Microsoft-centric security environment
Excellent knowledge of Defender XDR, Sentinel, Entra ID, Azure, Microsoft 365 and Purview
Experience designing and implementing security controls, not just recommending them
Strong knowledge across identity, cloud, endpoint, data, network and application security
Experience with threat modelling and security architecture reviews
Exposure to detection engineering, incident response, threat hunting and vulnerability management
Security automation or scripting experience
Knowledge of Zero Trust, ISO 27001, Cyber Essentials Plus and NIST CSF
The ability to communicate technical security risk clearly to senior stakeholders
Experience within professional services, financial services or another regulated/client-confidential environment would be particularly useful.

One of the most interesting parts of this role is the firm's investment in AI.

You'll help define how technologies such as Microsoft 365 Copilot, AI agents and custom AI applications can be adopted securely, putting practical controls around identity, access, data and emerging security risks.

It's a great opportunity for someone who wants to build experience at the intersection of Security Engineering, Architecture and AI Security.

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