Find your next tech and IT Job or contract IT security in England

At CGI, we partner with the UK’s Defence sector to deliver mission-critical digital and logistics capabilities that strengthen national security and operational excellence. In this role, you’ll play a key part in shaping service performance, logistics management, and secure asset control—ensuring seamless service delivery across complex Defence programmes. You’ll have the opportunity to take ownership of key processes, drive innovation in service management, and work in a collaborative environment where your ideas make a measurable impact on client success and future defence capability. 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 is based out of our Reading office full time.

Location: Basingstoke (Hybrid) Salary: Up to £80K plus benefits Security Clearance: Active UK DV required Travel Required: Travel expected to client offices The Mission We are looking for a versatile Senior Systems Infrastructure Engineer who thrives on variety. You won't be siloed into a single technology; instead, you'll oversee a complex, high-security ecosystem spanning Windows, Linux, and modern Software-Defined and Cloud Data Centres. You are the "Safe Pair of Hands" for our infrastructure-capable of designing a network, automating a server build, and troubleshooting a production outage with equal precision. This role is twofold, working on internal cutting-edge R&D projects alongside customer-facing delivery responsibilities for our clients. Key Responsibilities Full-Stack Infrastructure: Support the design, lead deployments, support the lifecycle management of high-availability servers, storage, and networking Hybrid Environment Management: Administer a diverse production estate, ensuring seamless interoperability between Windows and Linux platforms. Infrastructure as Code: Drive the shift toward automated deployments using tools such as Terraform and Ansible to reduce manual configuration. Advanced Troubleshooting: Act as the final point of escalation for complex system defects, utilising deep-dive forensics across both physical hardware and digital layers. Virtualisation Oversight: Maintain and optimise our virtualised environments (vSphere/vSAN) as part of a wider software-defined strategy. What you'll Bring Broad Systems Expertise: Deep Wintel knowledge (Active Directory, PowerShell, DNS/DHCP) combined with a solid foundation in Linux. Automation-First Mindset: Experience (or a strong desire) to work with Configuration Management and IaC tools. Hardware & Networking: A "builder" mentality-capable of configuring hardware and understanding the underlying network fabric (switching, routing, security). Senior Leadership: The ability to take a project from a blank whiteboard to a fully documented production reality. Requirement: An active DV Clearance is essential due to the sensitive nature of the environments you will support. The Benefits Financial: Up to £80,000. Security: Full-time, permanent role within a stable, high-growth sector. Balance: A genuine hybrid working model based in Basingstoke and the Southeast. Potential for international travel. Perks: 25 days leave, private medical cover and a competitive pension. Due to the nature and urgency of this post, candidates holding or who have held high level security clearance in the past are most welcome to apply. Please note successful applicants will be required to be security cleared prior to appointment which can take a minimum 18 weeks. LA International is an award-winning partner of choice for many of the world's most influential companies and government organisations. Holding Enhanced Government Security Accreditation, we are recognised as the European market leader in the delivery of Security Cleared talent to organisations that demand the very highest levels of security, compliance and assurance. An award-winning organisation, having secured the prestigious Queens Award for Enterprise: International Trade over multiple years. We are committed to fostering an inclusive, equitable and accessible workplace where everyone feels valued and supported. We welcome applications from all individuals, regardless of background or identity, and we encourage candidates who may not meet every listed requirement to still apply. If you require any adjustments or support during the recruitment process, please let us know and we will work with you to ensure a fair and accessible experience. Please Note: If a high volume of applications is received, only candidates shortlisted will be contacted.

At CGI, you will play a pivotal role in enabling the deployment and operation of advanced AI systems that support critical national security outcomes. Working within our Space, Defence and Intelligence business unit, you will help design and deliver secure, scalable machine learning platforms that power innovation across mission-critical environments. We combine deep sector expertise with emerging technologies and collaborative delivery to create impactful solutions, giving you the opportunity to take ownership of complex challenges, contribute creative ideas, and grow within a supportive, expert-led community. The Space, Defence and Intelligence business unit in CGI is a true IT Systems Integrator. We work, build, and operate bespoke, technically complex, mission-critical systems which help our clients keep us all safe and secure. We bring innovation to our clients using proven and emerging technologies, agile delivery processes and our deep expertise across the breadth of space, defence, intelligence, aerospace and maritime, all underpinned by our end-to-end cyber capability. We work collaboratively with global technology companies, cutting edge SMEs and academia to deliver the optimal solution for each client. 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 based on site near Gloucester 5 days a week.