Senior Solution Architect - ERP Transformation

In this role, you will take ownership of defining and assuring the end-to-end solution architecture for a major ERP transformation programme, working from concept through design, delivery and handover. You’ll ensure solutions are fit for purpose, aligned with business requirements and architectural principles, and designed to meet critical requirements across security, resilience, performance, scalability and supportability. You’ll work autonomously while collaborating closely with programme leadership, suppliers, integrators and multidisciplinary teams. You’ll bring independent thinking to supplier designs, constructively challenge decisions and provide clear architectural recommendations, with the backing of CGI colleagues and the wider architecture community. Alongside the ERP programme, you’ll contribute your expertise to broader solution architecture priorities within the client’s Digital Architecture function.

• Lead & Shape - Define and assure end-to-end solution architecture for the ERP implementation across application, integration, data, infrastructure and security domains.
• Review & Assure - Critically assess supplier HLDs, LLDs, functional designs and non-functional designs, ensuring solutions meet agreed requirements and standards.
• Govern & Guide - Support design authorities, design gate reviews, stage gates and readiness assessments, maintaining clear architecture decisions and documentation.
• Challenge & Improve - Provide evidence-based challenge to suppliers and identify opportunities to strengthen solution quality, security and resilience.
• Advise & Influence - Provide clear architectural recommendations to programme leadership, stakeholders and assurance groups.
• Assess & Decide - Undertake options analysis, feasibility assessments and solution evaluation, balancing benefits, costs, risks and technical constraints.
• Manage & Mitigate - Identify architectural risks and issues early and develop appropriate mitigation approaches.
• Collaborate & Deliver - Work across multidisciplinary teams and with third-party partners to translate business needs into practical, sustainable solutions.

You’ll be an experienced Solution, Technical or Enterprise Architect with a strong record of delivering complex digital transformation and providing independent architectural assurance. You’ll combine broad technical knowledge with strong stakeholder and supplier management skills, taking ownership of architectural decisions while working collaboratively through ambiguity to achieve successful outcomes.

• Significant experience as a Solution Architect, Technical Architect or Enterprise Architect within a complex organisation.
• Proven experience delivering large-scale digital transformation, ideally including ERP programmes.
• Strong experience defining and assuring end-to-end solution architectures across multiple technology domains.
• Strong knowledge across application, integration, data, infrastructure and security architecture.
• Experience translating business requirements into solution designs and technology roadmaps.
• Proven ability to review and assure supplier HLDs, LLDs, functional and non-functional designs.
• Experience working with third-party suppliers, systems integrators and software vendors, including providing independent supplier assurance.
• Strong understanding of Non-Functional Requirements, including security, availability, scalability, resilience, performance, disaster recovery and supportability.
• Knowledge of cloud architecture patterns and services, particularly AWS and Microsoft Azure.
• Experience operating within formal architecture governance, including design authorities or design review boards.
• Strong technical leadership, stakeholder management, documentation and decision-logging capabilities.
• Proven ability to identify and mitigate architectural risks and make sound decisions where information remains incomplete.
• Experience within public-sector or regulated environments.
• Awareness of secure-by-design principles and the ability to critically assess architecture from a security perspective.
• Familiarity with NCSC guidance, public-sector security frameworks, data governance or information management frameworks would be advantageous.

Pulled from the full job description

• Company pension
• Private medical insurance

At CGI, you’ll play a leading role in shaping a major business and digital transformation programme that will strengthen how critical public services operate. As a Senior Solution Architect, you’ll take ownership of end-to-end architecture for a modern ERP implementation, helping replace legacy finance, HR and procurement systems while improving resilience, data quality, financial control and regulatory compliance. You’ll have the scope to challenge thinking, influence strategic technology decisions and turn complex requirements into solutions that deliver lasting value. Working with programme leaders, suppliers and multidisciplinary experts, you’ll be supported by a collaborative CGI community while bringing your creativity and architectural expertise to decisions that will shape both the programme and the client’s wider 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., 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.