Senior Site Reliability Engineer; SRE

Role: Senior Site Reliability Engineer (SRE) – Kubernetes / Open Shift

Location: Remote - UK (possible paid occasional travel to TIG Secure site locations as required)

Job Type: Full-time, Permanent (37.5 hours)

Salary: Competitive + benefits + package

Security Clearance Requirements

Please 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 UK
• Have lived in the UK continuously for the past 5 years
• Not have spent more than 6 months outside the UK in total during that period
• Be willing to undergo security vetting as part of the onboarding process

You’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.

We’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, Git Ops, 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 Git Ops 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 build reliable foundations that enable other engineering teams to deliver safely and at pace.

This is not a ticket‑handling role. It is a senior engineering position where you’ll be expected to own problems, drive improvements, and help shape how TIG operates critical cloud‑native infrastructure.

You’ll be joining our Cloud team, working closely with Platform Engineering and wider engineering teams responsible for the foundational platforms on which TIG’s services run.

This is a great opportunity to join a small, senior technical environment where you can have direct ownership, meaningful influence, and visibility across modern platform engineering, Kubernetes, automation, observability, security and cloud‑native delivery.

• Operate, harden and extend production Open Shift / OKD / Kubernetes clusters across on‑premises and hybrid environments.
• Support the migration from VMware to KVM, helping modernise the underlying compute and storage layer.
• Own and improve CI/CD processes across the full lifecycle of platform and application components.
• Work with platform and application engineers to support cloud‑native delivery using tools such as Helm and Kustomize.
• Develop and mature Git Ops deployment practices using tools such as Argo CD or Flux.
• Maintain and improve core platform services including…