Infrastructure Engineers

CGI’s Space, Defence and Intelligence business unit, focuses primarily on the delivery of contemporary and innovative technical solutions for the government agencies most challenging problems. We work, build, and operate bespoke, technically complex, mission-critical systems which help our clients keep us all safe and secure. We are currently looking for an experienced infrastructure engineers to join our cross-functional team who, in partnership with our clients, will help define, guide and assure the delivery of integrated solutions. The role offers fantastic opportunities to work within an interesting and highly rewarding environment. We are heavily committed to developing our members and provide excellent learning and development opportunities to ensure that your knowledge and skills keep pace with the evolving technology landscape. We engender a culture of innovation, collaboration and ownership; highly motivated self-starters thrive within our organisation. Although we would like candidates to have all the skills we need, we would consider high quality individuals who meet most of the criteria.

Due to the secure nature of this project, this role requires candidates to either already hold, or be eligible to obtain, a high level of UK Security Clearance. To meet the eligibility criteria for this clearance, applicants must be sole British nationals, have been resident in the UK for the past 10 years, and must not have spent more than 28 consecutive days outside the UK within the last five years. Individuals who do not currently hold clearance are still encouraged to apply and will be considered both for this position and for other suitable opportunities within CGI where appropriate.

This role is primarily based on a secure client site and requires attendance on site five days per week due to the sensitive nature of the work and the systems involved. While the position is predominantly site-based, there may be occasional flexibility where business needs and security constraints allow. Any such arrangements would be agreed in advance with the project team.

Your future duties and responsibilities

• Design, implement, and manage complex network architectures, including LAN, WAN, and cloud-based systems.
• Monitor network performance, troubleshoot issues, and optimize network resources to ensure high availability and security.
• Configure and maintain firewalls, routers, switches, and VPNs in compliance with security policies.
• Oversee the installation, configuration, and maintenance of storage solutions, including SAN, NAS, and backup systems.
• Ensure data integrity, availability, and security through regular backups, disaster recovery planning, and storage optimization.
• Implement and manage storage policies, quotas, and replication to ensure efficient and secure data management.
• Install, configure, and maintain Windows Server environments, including Active Directory, Group Policy, DNS, DHCP, and other core services.
• Perform regular patch management, software updates, and system upgrades to maintain security and performance standards.
• Manage user accounts, permissions, and access controls in accordance with organizational security policies.

• Proven experience in one or more areas of infrastructure management: network, storage, or Windows Server.
• Ability to think outside the box and solve complex technical challenges.

Together, as owners, let’s turn meaningful insights into action.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named one of the ‘World’s Best Employers’ by Forbes magazine. 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.

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll 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. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

Come join our team-one of the largest IT and business consulting services firms in the world.