Infrastructure & Security Engineer

Infrastructure & Security Engineer
SC Clearance Preferred | Eligible for SC Clearance
Cheltenham, UK (On-site 4 days p/w) | Permanent Role

A growing cyber security R&D organisation is looking for an Infrastructure & Security Engineer to take ownership of its internal IT infrastructure, security operations, and corporate technology estate.

You'll play a key role in maintaining and improving the organisation's infrastructure while leading projects that enhance security, resilience, and operational efficiency. This is an ideal opportunity for someone who enjoys solving complex technical challenges and working across a varied technology stack.

The Role

As an Infrastructure & Security Engineer, you will be responsible for managing and securing the organisation's IT estate, including Microsoft 365, AWS infrastructure, endpoint management, networking, security tooling, and disaster recovery processes. You'll work closely with technical teams to identify improvements, implement new technologies, and support innovative research environments.

Key Responsibilities
Infrastructure & Systems Administration

• Manage Windows and Linux endpoints, including provisioning, configuration, patching, compliance, and lifecycle management.
• Administer Microsoft 365 services, identity management platforms, SSO integrations, certificates, and user lifecycle processes.
• Maintain and develop AWS cloud infrastructure and supporting business systems.
• Manage office networking, standalone research networks, VoIP, and collaboration technologies.
• Maintain infrastructure documentation and asset management processes.

Security & Compliance

• Operate and improve security tooling covering endpoint security, monitoring, vulnerability management, and remediation activities.
• Coordinate external penetration testing engagements.
• Lead Cyber Essentials and Cyber Essentials Plus certification activities.
• Drive infrastructure improvements that strengthen security, resilience, and governance.
• Support security best practices across internal platforms and services.

Cloud & Platform Engineering

• Maintain and enhance the company's AWS environment.
• Support secure cloud infrastructure design and implementation.
• Build and maintain services for standalone and research networks.
• Design and implement centralised authentication solutions.
• Support self-hosted and emerging technology platforms, including AI/LLM infrastructure.

Business Continuity & Improvement

• Own backup, disaster recovery, and business continuity processes.
• Regularly test recovery procedures and backup integrity.
• Deliver infrastructure improvement projects that enhance operational effectiveness.
• Evaluate and introduce new technologies and tooling to support business growth.

Essential Skills & Experience

• Strong systems administration and IT infrastructure background.
• Experience managing Windows and Linux environments.
• Microsoft 365 administration experience.
• Knowledge of identity management, SSO, and access control technologies.
• Experience with AWS infrastructure and cloud services.
• Networking experience covering enterprise and standalone environments.
• Exposure to endpoint management platforms such as Microsoft Intune.
• Strong troubleshooting and analytical skills.
• Interest in cyber security and secure infrastructure practices.
• Ability to take ownership of issues and see them through to completion.
• Willingness to learn and adopt new technologies.

Desirable Skills

• Cyber Essentials / Cyber Essentials Plus experience.
• Vulnerability management and security tooling experience.
• Endpoint security and remediation experience.
• Experience supporting penetration testing activities.
• Cloud security knowledge.
• Research, R&D, or cyber security industry experience.
• Experience with authentication platforms and certificate management.
• Exposure to AI or self-hosted infrastructure environments.

Benefits

• Lucrative salary package
• Discretionary annual bonus (typically 10-15%).
• Pension contribution up to 6%.
• 26 days annual leave with option to buy or sell additional days.
• Private medical insurance including dental cover.
• Ongoing training and development budget.
• Paid time for courses, certifications, and conferences.
• Opportunity to work within an innovative cyber security R&D environment.

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.