UK CITIZENSHIP REQUIRED FOR THIS POSITION: Yes RELOCATION ASSISTANCE: No relocation assistance available CLEARANCE TYPE: UK-Security Check (SC) TRAVEL: Yes, 10% of the Time What’s your possible? At Northrop Grumman UK, you’re part of a team defining what’s possible—solving tomorrow’s challenges and shaping the technology solutions of the future. This mindset drives not only our customer solutions but also your career development and the impact we make in our communities. This is more than just a job—it’s a mission. We’re looking for an experienced Infrastructure Systems Administrator to join our pioneering team working at the intersection of Information Technology (IT) and Operational Technology (OT). You’ll help design, develop, and maintain secure infrastructure for naval platform management systems—supporting both surface ships and submarines. This role is part of our mission systems team, where innovation meets purpose. You’ll be instrumental in ensuring the reliability, security, and compliance of our development environment and final product—contributing directly to national defence and global security. What you’ll be doing: Designing ICS Infrastructure for naval platforms, ensuring high availability and defence-grade security. Integrating IT/OT systems to support mission-critical operations. Managing Windows Server and Red Hat Linux environments, optimising for performance and compliance. Implementing virtualisation solutions (VMware, Hyper-V) to support scalable development. Maintaining IT assets and automating monitoring/reporting across the development environment. Enforcing cybersecurity standards, conducting vulnerability scans, and ensuring regulatory compliance (ISO 27001, IEC 62443). What we’re looking for: Proven experience in IT infrastructure, ideally with IT/OT integration. Strong skills in Windows Server domains and Red Hat Linux. Hands-on experience with virtualisation technologies (VMware, Hyper-V). Knowledge of cybersecurity practices and vulnerability management. Familiarity with defence regulations and secure system design. Experience in IT asset management and automated monitoring tools. If you don’t meet every requirement, we still encourage you to apply. We value diverse experiences and perspectives. Security Clearance Due to the nature of our work, you must be a Sole UK National and able to gain and maintain SC-level UK Government security clearance. Our recruitment team is here to support you through the process: talentenquiries@uk.ngc.com What we offer: Flexible working options, including compressed fortnight Private healthcare and cash health plan Holiday buy/sell scheme Career development programmes and mentorship Performance-based bonuses Why join us? A Mission to Believe In – Every day, we contribute to building a more secure and connected world. A Place to Belong and Thrive – Every voice matters. We foster an inclusive culture where you can be yourself. Your Career, Your Way – Shape your journey with diverse roles, training, and development opportunities. Ready to apply? Yes – Submit your application online. Possibly – Reach out to our team for more information: talentenquiries@uk.ngc.com No – Explore other opportunities with us. We’re growing across the UK. Northrop Grumman is committed to hiring and retaining a diverse workforce, and encourages individuals from all backgrounds and all abilities to apply and consider becoming a part of our diverse and inclusive workforce. Existing Applicants: Need to update your contact information or email address? Once logged in, click on Candidate Home in the upper right corner and scroll to the bottom of that screen to see buttons for: Update Contact information to update your legal name, address, and phone number Edit Account Settings to edit your email address We are a pioneering company. With careers across all areas: air, cyber, land, sea and space – our 90,000 employees work as one to defend and define the future. Northrop Grumman careers and internships are as varied as your interests, with a lifetime of potential that will give you every opportunity to do your best work. Working together with people from many backgrounds, personal passions and disciplines, we share a drive to push the boundaries of science, technology and engineering to meet the ever evolving needs of our customers worldwide.