Site Reliability Engineer (DV Security Clearance) Job at Gloucester, Gloucestershire Full Time

Position Description
At CGI, we deliver mission-critical technology solutions that help protect the UK’s national interests and support some of the country’s most important programmes. As a Site Reliability Engineer, you will play a key role in ensuring the reliability, scalability and performance of critical services, helping teams deliver resilient platforms that operate at scale. Working within a collaborative and innovative environment, you will have the opportunity to influence platform strategy, automate complex processes, and drive continuous improvement while being supported in developing your skills and career. Your work will directly contribute to operational excellence and the successful delivery of high-impact outcomes for our clients.

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 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.

Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This role will be based on a secure site.

Your future duties and responsibilities
As a Site Reliability Engineer, you will help ensure the availability, resilience and performance of mission-critical services supporting national security programmes. You will work closely with software engineers, platform teams and stakeholders to automate operational processes, improve observability and enhance system reliability. In this role, you will take ownership of service health, contribute to platform evolution and help create scalable solutions that enable teams to deliver high-quality outcomes efficiently and securely.

You will play a key role in strengthening Kubernetes-based environments, supporting deployment automation and driving continuous improvement across infrastructure and operations. Working within Agile teams, you will investigate incidents, identify root causes and implement preventative measures that improve long-term service stability and operational effectiveness.

Key responsibilities:

Improve & Enhance service reliability, availability and operational resilience
Automate & Optimise infrastructure, operational workflows and platform processes
Design & Implement monitoring, alerting and observability solutions
Support & Scale Kubernetes and containerised environments
Develop & Deliver CI/CD pipelines and deployment automation capabilities
Investigate & Resolve incidents, conducting root cause analysis and remediation
Enhance & Improve platform performance, scalability and efficiency
Collaborate & Contribute within Agile, cross-functional delivery teams
Drive & Champion continuous improvement and operational excellence initiatives

Required qualifications to be successful in this role
To succeed in this role, you should have practical experience supporting modern cloud-native platforms and a strong understanding of reliability engineering principles. You will be comfortable working across infrastructure, automation and software engineering disciplines, with the ability to troubleshoot complex issues and contribute to highly available, scalable environments.

Essential qualifications and experience:

Experience with Kubernetes and containerised environments
Strong knowledge of monitoring, logging and observability tooling
Linux administration and troubleshooting expertise
Experience with Infrastructure as Code (IaC) and automation tools
Knowledge of CI/CD pipelines and release automation practices
Understanding of incident management and service reliability methodologies
Programming or scripting experience in Go, Python, Java and/or Bash
Experience working with Git-based development workflows
Strong problem-solving and analytical skills
Ability to work effectively within Agile delivery teams

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

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.