Senior Site Reliability Engineer (SRE)

The role is for a Senior Site Reliability Engineer (SRE) specializing in Kubernetes and OpenShift, supporting secure, regulated environments with a focus on reliability, automation, and platform maturity.

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

Salary: Competitive + benefits + package

Responsibilities

• Operate, harden and extend production OpenShift / 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 GitOps deployment practices using tools such as Argo CD or Flux.
• Maintain and improve core platform services including identity, ingress, observability, certificate management, service mesh and container registry capabilities.
• Build and operate observability across logs, metrics, traces, alerting, SLOs and error budgets.
• Improve platform hardening in line with secure and regulated environment requirements, including network policy, SELinux, image provenance, secret management and audit.
• Automate repeatable operational tasks using tools such as Ansible, Terraform, Helm, Kustomize, Go, Python or equivalent technologies.
• Lead incident response activity, support blameless post-mortems and drive systemic fixes.
• Partner with networking and security teams on platform integration, segmentation, load balancing and accreditation evidence.
• Create and maintain clear technical documentation, runbooks, design notes and operational guidance.
• Mentor other engineers and act as a senior technical authority across cloud and Kubernetes operations.
• Participate in an on-call rota, with appropriate compensation.

Requirements

• Strong experience running production Kubernetes environments, not just consuming or deploying into them.
• Strong Linux fundamentals, including systemd, networking, storage and performance troubleshooting.
• Experience with at least one Kubernetes distribution such as OKD, OpenShift, vanilla Kubernetes, Rancher, EKS, AKS or GKE.
• Solid infrastructure as code experience, including Ansible plus Terraform or equivalent, alongside tools such as Helm and Kustomize.
• GitOps and CI/CD experience managing full application and component lifecycles, using tools such as Argo CD, Flux, GitHub Actions or similar.
• Prometheus, Grafana, Elastic Stack / LGTM, OpenTelemetry or similar.
• Experience working with identity and access technologies such as OIDC, SAML, SCIM or Keycloak.
• Experience with virtualisation or infrastructure platforms such as KVM, libvirt or VMware.
• Scripting or tooling experience using Go, Python, shell scripting or similar.
• Strong troubleshooting, problem-solving and analytical skills.
• Experience working in secure, regulated or enterprise-scale environments.
• Strong communication skills, with the ability to produce clear documentation, runbooks, post-mortems and technical guidance.
• Eligible to hold UK SC clearance.

Benefits

• Private Medical
• Health Cash Plan
• 4x Life Assurance
• Inclusive Culture
• Holiday: Generous holiday allowance
• Learning: Access to continuous learning and development opportunities
• Bonus Potential: Bonus potential based on performance and business-related factors
• Discounts: Discounts on a wide range of products and services
• Pension: Pension scheme contributions
• EV Car Scheme
• Regular Pay Reviews
• More Benefits: Explore additional benefits on our career site.

Additional Information

• Here at TIG we are committed to equal opportunities and value diversity, equity and inclusion at our company. We do not discriminate based on race, religion, colour, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status.
• Individuals with disabilities are encouraged to request reasonable accommodations during the hiring process and within the job.