Principal Platform Engineer

Principal Platform Engineer

Position Description
At CGI, we help clients deliver secure, resilient digital services that make a real-world impact. As a Principal Platform Engineer, you will play a pivotal role in shaping and evolving a critical platform, driving engineering excellence through automation, security, and innovation. You will influence how modern platform engineering practices are adopted, enable safe and effective use of AI-assisted development tools, and help accelerate the delivery of high-quality solutions. Working alongside talented colleagues across engineering, security, architecture, and delivery teams, you will have the opportunity to take ownership of strategic initiatives, introduce new ideas, and contribute to meaningful outcomes in a supportive and collaborative environment.

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. These roles will be predominately hybrid with some work based in UK CGI or client offices depending on the specific programme. Travel away from base office will be expensed.

Your future duties and responsibilities
In this role, you will provide technical leadership for a critical platform service, ensuring it remains secure, reliable, scalable, and aligned with client expectations. You will help define and mature platform engineering, DevSecOps, and automation strategies, driving improvements across software delivery, infrastructure management, observability, and operational resilience. Working closely with engineering, security, architecture, product, and delivery teams, you will influence technical direction while enabling the adoption of modern engineering practices and AI-assisted development capabilities.

You will lead by example, mentoring engineers and fostering a culture of continuous improvement, innovation, and accountability. You will have the opportunity to shape platform capabilities, improve developer experience through self-service tooling and automation, and contribute to strategic initiatives that enhance service quality, operational efficiency, and business outcomes.

Key responsibilities:

• Provide technical leadership and mentorship across the Platform Engineering team
• Shape the platform engineering and DevSecOps roadmap, driving adoption of secure and automated practices
• Enhance CI/CD pipelines to improve deployment speed, quality, and reliability
• Champion the responsible use of AI-assisted engineering tools across development and operational activities
• Contribute to the design of secure, scalable, and resilient platform architectures
• Own and continuously improve cloud tooling, infrastructure services, and delivery platforms
• Increase operational efficiency through automation of infrastructure, configuration, testing, and documentation processes
• Establish effective observability, monitoring, alerting, and incident management capabilities
• Embed security controls and compliance requirements throughout the engineering lifecycle
• Collaborate with architecture, security, product, delivery, and engineering teams to align platform capabilities with business objectives
• Lead root cause investigations and implement long-term service improvements
• Support the operational service through participation in the on-call rota for critical incidents
• Evaluate emerging technologies, platform engineering trends, and AI capabilities to drive continuous improvement

Required qualifications to be successful in this role
You should bring significant experience in platform engineering, DevSecOps, cloud infrastructure, and technical leadership within enterprise environments. You will have a strong track record of delivering secure, automated, and resilient platforms while leading teams, driving continuous improvement, and influencing engineering best practice. Experience with cloud technologies, infrastructure as code, observability platforms, security frameworks, and AI-assisted engineering approaches will be highly valuable.

Essential qualifications:

• Extensive experience in Platform Engineering, DevOps, Site Reliability Engineering, or DevSecOps leadership roles
• Expert knowledge of Azure and cloud-native engineering practices
• Proven success designing and implementing CI/CD solutions using Azure DevOps, Jenkins, GitHub Actions, and Git
• Advanced capability with Infrastructure as Code tools including Terraform, Azure Bicep, ARM Templates, and Ansible
• Deep understanding of Linux and/or Windows Server administration within enterprise environments
• Hands-on experience with containerisation and orchestration technologies such as Docker and Kubernetes
• Proficiency in scripting and automation using PowerShell, Bash, Python, or similar technologies
• Demonstrable expertise implementing observability solutions including Prometheus, Grafana, Dynatrace, ELK, or Zabbix
• Knowledge of cloud security, container security, and secure software delivery methodologies
• Familiarity with security frameworks and governance standards such as OWASP, CIS Benchmarks, and NIST
• Practical application of AI-assisted engineering tools to improve software delivery and operational outcomes
• Ability to define governance, controls, and assurance processes for responsible AI adoption
• Excellent stakeholder engagement, communication, problem-solving, and leadership skills

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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.