Senior Site Reliability Engineer (SRE)

Role: Senior Site Reliability Engineer (SRE) – Kubernetes / OpenShiftLocation: Remote -UK (possible paid occasional travel to TIG Secure site locations as required)Job Type: Full-time, Permanent (37.5 hours)Salary: Competitive + benefits + packageSecurity Clearance RequirementsPlease note that holding a current Security Clearance is not essential at the time of application, but eligibility is required.This role requires the successful candidate to be eligible for Security Check (SC) clearance. To meet this requirement, applicants must:Have the right to work in the UKHave lived in the UK continuously for the past 5 yearsNot have spent more than 6 months outside the UK in total during that periodBe willing to undergo security vetting as part of the onboarding processAbout UsCome and be a part of The Investigo Group(TIG), a dynamic coalition of cutting-edge tech firms specialising in Platform, Software, Data, AI and other bleeding-edge technology solutions. Our innovative prowess spans the globe while proudly hailing from the United Kingdom.The group is multi-functional with a large portfolio of B2B products and services.Our ecosystem is made up of:Voixtel, secure communications and voice platforms for regulated and critical environments.IIS, Providing secure internet access in both the public and private sectors. Its mission? To deliver world-class secure internet capabilities enhancing productivity across diverse skillsets and organisations.Vestigo Consulting is our training and consultancy company, tailored around specialist sector-specific knowledge, and provides regular courses and CPD for our community. The Consultancy side concentrates on expert support of our customers as well as specifically assigned individual deployments.Collaboraite is a bleeding-edge company that provides our Data and AI capability. A collaborative partner for designing user-centred secure data solutions to overcome operational hurdles, delivered through design thinking and agile coaching.The group provides bespoke, secure, user-centric products fuelled by deep technical knowledge advanced data and analytical skills.We proudly stand as a global leader in this space, partnering with esteemed entities that require these advanced forward-thinking capabilities. These partnerships have been forged from our understanding of customer challenges, as well as our expertise in developing world-leading enterprise product sets.Join us at TIG, where innovation knows no bounds, and together, we'll shape the future of technology solutions for a safer, more efficient world.Diversity, Equity, and Inclusion (DEI) are at the heart of The Investigo Group (TIG). We're dedicated to creating a workplace where people from all backgrounds are not only welcome but empowered to excel. We actively seek diverse talent, promote fairness, and foster an inclusive environment where every voice matters, driving innovation and progress in our dynamic tech community.About YouYou’re an experienced SRE, Platform Engineer or Cloud Engineer with strong hands-on experience running Kubernetes in production environments.You’re comfortable working across Linux, Kubernetes, cloud-native tooling, automation, observability, CI/CD and infrastructure as code. You understand that reliability, security and operational maturity are critical to how modern platforms support engineering teams and customer-facing services.You enjoy treating infrastructure as a product, automating repeatable work, improving resilience, and building platforms that other engineers can rely on. You’re calm under pressure, methodical during incidents, and able to turn operational challenges into long-term improvements.You may have worked in a regulated, secure, government, defence, financial services, telecoms, managed services or cloud-native environment, but most importantly you have operated Kubernetes at depth and understand the realities of production ownership.You’re a senior individual contributor who can mentor others, influence engineering practice, and provide technical authority without needing formal line management responsibility.About the RoleWe’re looking for a Senior Site Reliability Engineer (SRE) to help operate, harden and mature our production OKD / Kubernetes platforms.This is a hands-on engineering role focused on reliability, automation, observability, GitOps, CI/CD and secure platform operations. You’ll work across the full stack, from bare-metal and virtualisation through to Kubernetes control plane operations, ingress, identity, monitoring, developer platform tooling and application delivery.The role will play a key part in improving the operational maturity of our platform estate, supporting the migration from VMware to KVM, strengthening GitOps and CI/CD practices, and helping ensure our platforms remain secure, scalable and aligned to the needs of regulated customer environments.You’ll work closely with platform, application, AI, networking, security, QA and architecture teams to