Infrastructure Engineer

At CGI, we're building the next generation of secure identity solutions that power critical national infrastructure. As an Identity Solutions Engineer, you'll play a pivotal role in designing and deploying a new, on-premise Microsoft-based identity platform that delivers resilience, scalability, and trust. This is a rare opportunity to shape a greenfield environment that protects essential systems and enables seamless access for thousands of users. Working alongside talented architects and engineers, you'll help us drive transformation through innovation, collaboration, and technical excellence—empowering our clients and communities to thrive in a secure digital future.

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. This role is based on site in Chippenham 5 days a week.

Candidate Profile
In this role, you will take ownership of designing, deploying, and supporting a new on-premise identity platform built on Microsoft technologies. You'll collaborate closely with solution architects, infrastructure teams, and cybersecurity experts to implement secure, scalable, and high-performance identity services from the ground up. Your work will underpin the stability, security, and accessibility of critical systems—making a tangible impact every day.

You'll bring creativity and problem-solving to each phase of delivery, helping define technical standards, automate operations, and ensure smooth service transition. Supported by CGI's collaborative community, you'll be empowered to drive continuous improvement and shape the long-term evolution of our identity services.

Key Responsibilities
Design & Deploy: Build and configure a new identity platform using Windows Server 2022, Active Directory, and ADFS.

Integrate & Secure: Establish and manage federation services and authentication trust relationships.

Optimise & Automate: Identify opportunities for automation, monitoring, and performance enhancement.

Collaborate & Deliver: Work with application, network, and security teams to ensure seamless integration and compliance.

Support & Evolve: Provide operational support, including troubleshooting, patching, and system documentation.

Required Qualifications To Be Successful In This Role
You should have a proven track record in Microsoft identity and access technologies, with hands-on experience building and supporting complex environments. Success in this role requires strong technical depth, attention to detail, and the ability to work collaboratively in secure, high-stakes settings.

Essential Skills And Experience
Extensive experience with Windows Server 2022, Active Directory, and ADFS.

Strong understanding of identity federation using SAML, OAuth 2.0, and OpenID Connect.

Proficiency in Single Sign-On (SSO) and Role-Based Access Control (RBAC) implementation.

Familiarity with networking, virtualisation, and enterprise security principles.

Experience In Defence, Government, Or Other Secure Enterprise Environments.
Excellent communication skills and a proactive, solution-oriented mindset.

Desirable
Microsoft Certified: Identity and Access Administrator Associate.

PowerShell scripting and automation experience.

Exposure to hybrid identity or cloud integration models.