Senior Infrastructure Engineer

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Position

Description:

CGI is helping shape the future of secure defence technology through the delivery of innovative mission-critical infrastructure solutions.

As an Infrastructure Engineer you will play a key role in supporting the deployment of a new on-premises cloud platform for the MOD helping to deliver resilient secure and high-performing environments that enable operational success.

Working alongside experienced technical specialists you will have the opportunity to take ownership of complex infrastructure challenges contribute to meaningful outcomes and support the successful delivery of a strategically important programme.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK Best Employer by the Financial Times. We offer a competitive salary excellent pension private healthcare plus a share scheme (3.5% 3.5% matching) which makes you a CGI Partner not just an employee.

We are committed to inclusivity building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector including our Armed Forces and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant.

Join us and youll be part of an open friendly community of experts. Well train and support you in taking your career wherever you want it to go.

Due to the secure nature of the programme you will need to hold UK Security Clearance or be eligible to go through this clearance.

The role is Hybrid with travel to our Leatherhead office in Surrey

Your future duties and responsibilities:

In this role you will join an established team delivering a secure on-premises cloud solution for the Ministry of Defence.

You will support the design build configuration and testing of critical infrastructure components ensuring they meet operational and security requirements. Your expertise will help deliver a robust environment that supports both cloud-hosted applications and the wider user infrastructure including servers desktops and local area networks.

You will work closely with architects project teams clients and technology partners to develop and implement infrastructure solutions aligned to business and technical objectives.

Taking ownership of infrastructure design and operational readiness you will contribute to strategic decisions while helping to maintain high standards of security documentation and service delivery.

Key responsibilities:

Design & Deliver secure on-premises infrastructure solutions

Build & Configure servers desktops virtualisation platforms and supporting services

Test & Validate infrastructure components against operational requirements

Harden & Secure environments to meet stringent security standards

Administer & Optimise Microsoft-based infrastructure technologies

Collaborate & Advise project teams architects vendors and stakeholders

Create & Maintain technical documentation standards and templates

Support & Improve production development and test environments

Contribute & Influence infrastructure strategy and technology roadmaps

Troubleshoot & Resolve complex infrastructure issues

Required qualifications to be successful in this role:

To succeed in this role you will bring extensive infrastructure engineering experience gained within secure or highly regulated environments.

You will possess strong Microsoft platform expertise a proactive approach to problem solving and the ability to design implement and support enterprise-scale infrastructure solutions.

Experience working within defence or government environments would be highly advantageous.

Essential qualifications and experience:

You should have 10 years experience in Wintel infrastructure engineering

Strong expertise in Active Directory and Group Policy administration

Proven experience administering Microsoft Hyper-V environments

Strong Power Shell scripting and automation skills

Experience implementing and supporting PKI solutions

Proven ability to design build and secure enterprise infrastructure

Experience working within highly secure or classified environments

Strong understanding of infrastructure security hardening principles

Excellent troubleshooting documentation and stakeholder engagement skills

Desirable qualifications and experience:

Experience with Linux administration

Azure Stack Hub experience

Network design and implementation experience

Previous MOD or wider Defence sector experience

Understanding of hybrid cloud and on-premises cloud environments

#LI-RB8

Skills:

• Azure
• Linux
• Network
• Wintel/Windows Server
• Defense
• Infrastructure Design

What you can expect from us:

Together as owners lets turn meaningful insights into action.

Life at CGI is rooted in ownership teamwork respect and belonging. Here youll reach your full potential because

You are invited to be an owner from day 1 as we work together to bring our Dream to life. Thats why we call ourselves CGI…