Linux System Engineers

Onyx-Conseil; Greater London; Hybrid; GBP 60,000 - 80,000; Full time

Benefits offered by this job

Private healthcare

Excellent pension

Share scheme (3.5% + 3.5% matching)

Job summary

CGI is looking for an experienced System Engineer to join our Space, Defence and Intelligence team in the UK. The role focuses on delivering secure, mission-critical systems for government clients, with strong emphasis on collaboration and innovation.

Applicants must be sole British nationals with eligibility for UK Security Clearance. The position is site-based, five days a week, with potential flexibility aligned to security constraints and project needs.

Qualifications

• Experience as a System Engineer in defence/space or government IT environments.
• Ability to work in cross-functional teams and liaise with clients.
• Willingness to obtain and hold UK Security Clearance.

Responsibilities

• Define, guide and assure delivery of integrated solutions with CGI's Space, Defence and Intelligence unit.
• Work on site full-time at a secure client site in the UK, with occasional flexibility where needed.
• Collaborate with clients and internal teams to ensure secure, robust systems.

Job description

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 member 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 you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go.

• We offer a competitive salary
• excellent pension
• private healthcare
• plus a share scheme (3.5% + 3.5% matching) which makes you a member not just an employee.

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 System 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.