Wintel Engineer (Security Clearance) in London

Position Description:At CGI, we're delivering secure, resilient infrastructure that supports some of the UK's most critical defence and intelligence programmes. As a Windows Infrastructure Engineer, you'll help build and maintain mission-critical Windows environments, contributing to innovative solutions that strengthen security and performance. You'll take ownership of technical challenges, collaborate with experienced engineers and help shape reliable infrastructure services. With opportunities to develop your expertise, contribute new ideas and progress your career, you'll make a meaningful impact within a supportive, forward-thinking team.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 position will be full time on site in Chippenham.Your future duties and responsibilities:You'll build, configure and support secure Windows infrastructure, working alongside technical teams to deliver reliable platform services. You'll contribute to infrastructure design, resolve technical challenges and support the transition of solutions into live service, with opportunities to develop your skills and influence improvements.• Build & Configure: Deploy and maintain Windows Server infrastructure.• Design & Document: Contribute to technical designs and produce Low-Level Designs (LLDs).• Integrate & Deliver: Support wider infrastructure builds and networking dependencies.• Secure & Optimise: Manage patching, system performance and infrastructure security.• Support & Collaborate: Troubleshoot issues and support handover into live service.• Engage On-Site: Travel to project locations when required.Required qualifications to be successful in this role:You'll have hands-on Windows infrastructure experience, strong troubleshooting skills and the ability to work collaboratively within a secure technical environment.Essential skills:• Windows Server administration and infrastructure builds.• Active Directory, DNS and PKI.• Windows patch management.• Working knowledge of VMware, ideally VMware Cloud Foundation (VCF).• Infrastructure design documentation, including LLDs.• Understanding of networking fundamentals.Desirable skills:• Agile or SAFe methodologies.• Experience in secure or defence environments.• Strong communication and collaboration skills.Skills:Identity and access mgt (IAM)Patch ManagementVMwareWindows ServerAgileCommunicationSAFeWhat you can expect from us: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. 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.