Senior Information Security Engineer

Job Description We’re recruiting a Senior Information Security Engineer to support the Chief Information Security Officer in managing and reducing information security risks across Technology Services.

This is a hands-on, technical engineering role where you’ll help design, build and continuously improve the security controls, platforms and infrastructure that protect AJ Bell and our customers. You’ll be at the forefront of how we evolve our security capability, making sure our tools, systems and integrations are not only secure, but scalable, automated and  many ways, you’ll be a builder of our security foundations, helping ensure we can detect, prevent and respond to threats at pace while enabling the business to move safely and confidently.

Key responsibilities

Lead the design, delivery and ongoing improvement of enterprise security solutions across endpoint, cloud, network, Dev Ops and security monitoring environments.

Design and implement secure infrastructure controls aligned to industry best practice, ensuring scalability, resilience and operational effectiveness.

Evaluate, select and implement new security tools and platforms, driving automation, integration and measurable value across the estate.

Lead the adoption of new security technologies, ensuring smooth transition into operational support and long-term sustainability.

Oversee patch management across systems and hardware, ensuring effective coordination and risk reduction.

Support server hardening and secure configuration initiatives in collaboration with Infrastructure and Service Delivery teams.

Provide security oversight across projects and change initiatives, ensuring security is embedded from design through to delivery.

Support audits, regulatory reviews and due diligence activities, ensuring evidence and controls are robust and well maintained.

Act as a key technical link between the CISO function and Infrastructure teams, ensuring alignment across security and operational delivery.

Contribute to continuous improvement of cybersecurity risk management processes, helping to enhance maturity across the organisation.

About you Technical expertise

Proven experience implementing enterprise security platforms

Strong knowledge of security risk management tools and techniques

Deep understanding of security solutions (e.g. SIEM, PAM, IGA, endpoint protection, email/web gateways)

Experience with firewall technologies (desirable)
Knowledge of cloud security standards and solutions (desirable)
Strong understanding of core IT and networking principles

Awareness of the evolving threat landscape

Skills and experience

Experience working within frameworks such as ISO
27001, NIST or similar

Significant experience in IT security

Financial services or e-commerce experience preferred

Strong problem-solving skills and attention to detail

Ability to take ownership and deliver end-to-end solutions

Effective communicator, able to work across technical and non-technical teamsCISSP (achieved or in progress) desirable

About AJ Bell At AJ Bell, we believe investing should feel good. Whether you're looking for an ISA, pension or dealing account, whether you want to invest with the help of a financial adviser or do it yourself, we have easy-to-use solutions to suit people from all walks of life.

We're one of the UK's fastest-growing investment platform businesses, trusted by everyone from professional financial advisers to first-time investors.

Today, over 762,000customers trust us to manage more than 121.5billion of assets. By continually striving to make investing simpler and more accessible, we're helping more people take control of their financial futures.

We're proud to be recognised as one of the UK's Best 100 Companies to Work For for six consecutive years, and a Great Place to Work in 2025 and 2026, a reflection of our supportive and collaborative culture.

What we offer

Competitive starting salary
26 days holiday, increasing with service + buy/sell scheme + bank holidays 7% Pension with matched contributions

Discretionary bonus scheme

Share schemes (including free shares and BAYE)
Health Cash Plan and discounted private healthcare

Free gym Enhanced family leave (subject to…