CGI
Senior Infrastructure Architect
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Position Description
At CGI, you’ll shape the infrastructure foundations behind complex client solutions, turning business needs into secure, scalable and high-performing architectures. As a Senior Infrastructure Architect, you’ll take ownership of infrastructure decisions across bids, deals and projects, connecting solution architecture with practical implementation and ensuring technology delivers measurable value. You’ll have the freedom to evaluate emerging technologies, challenge assumptions and create innovative approaches while balancing performance, cost and risk. Working alongside solution architects, project teams, specialists and clients, you’ll be supported by CGI’s collaborative community while using your expertise to influence decisions, mentor colleagues and ensure infrastructure solutions remain aligned with both immediate delivery requirements and longer-term business goals.
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 is a hybrid position.
Your future duties and responsibilities
In this role, you will take ownership of defining, validating and communicating infrastructure architectures across bids, deals and projects. You’ll bridge the gap between solution architecture, technical delivery, business stakeholders and project management, translating requirements into logical infrastructure models, detailed component specifications and implementable designs.
You’ll act as a focal point for infrastructure teams, bringing together technical expertise from across CGI and our partners to create solutions that balance business outcomes, technical quality, cost and risk. You’ll have the opportunity to explore emerging technologies and challenge established approaches, while collaborating with experienced specialists who will support successful delivery. You’ll also share your expertise through mentoring and knowledge transfer, helping strengthen architectural capability across the team.
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- Architect & Define – Develop infrastructure architectures, logical models, component specifications and detailed designs aligned with the wider solution architecture.
- Lead & Influence – Act as the architectural focal point for infrastructure teams and set clear expectations with technical and business stakeholders.
- Advise & Innovate – Assess current and emerging technologies and provide evidence-based recommendations on suitability, performance and cost.
- Assure & Review – Lead and support technical design reviews to ensure infrastructure solutions meet requirements, standards and quality expectations.
- Manage & Mitigate – Own infrastructure concerns and architectural decisions while identifying and managing technical and non-technical risks.
- Optimise & Scale – Ensure non-functional requirements including availability, scalability, capacity and performance are addressed throughout the design.
- Estimate & Plan – Consolidate infrastructure effort and cost estimates from internal teams, suppliers and subcontractors to support project planning.
- Align & Deliver – Work with project managers, solution architects and specialist teams to make effective use of resources throughout the delivery lifecycle.
- Engage & Present – Develop architectural proposals and confidently present infrastructure solutions and recommendations to clients.
- Mentor & Support – Share architectural knowledge and support the development of colleagues across multidisciplinary teams.
Required Qualifications To Be Successful In This Role
You’ll bring significant experience designing and assuring enterprise infrastructure solutions, with the ability to move confidently between high-level architectural thinking and the detailed considerations required for successful implementation. You should be comfortable taking ownership of decisions, advising clients and working across multidisciplinary teams while balancing technical requirements, commercial considerations and delivery risk.
- Strong experience designing enterprise infrastructure architectures within complex environments.
- Proven ability to translate solution and business requirements into logical models, component specifications and detailed infrastructure designs.
- Strong understanding of infrastructure architecture principles, patterns and technical standards.
- Proven ability to write architectural proposals and communicate complex infrastructure solutions clearly.
- Experience presenting infrastructure architectures and recommendations directly to clients and senior stakeholders.
- Strong experience reviewing technical designs and assuring alignment with architectural and business requirements.
- Proven ability to identify, assess and mitigate technical and non-technical risks.
- Strong understanding of non-functional requirements, particularly availability, scalability, capacity and performance.
- Experience conducting capacity and performance assessments.
- Ability to produce reliable infrastructure effort and cost estimates for small to medium-sized projects.
- Experience supporting technical planning, change governance and the wider project lifecycle.
- Ability to assess emerging technologies and advise on their performance, benefits, risks and commercial implications.
- Experience working with technology vendors, suppliers and subcontractors.
- Strong stakeholder management, communication and technical leadership skills.
- Proven ability to mentor colleagues and share knowledge at an architecture level.
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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.
That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement. All hiring decisions remain entirely in the hands of our recruitment professionals.
Come join our team—one of the largest IT and business consulting services firms in the world.
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