Senior Infrastructure & Platform Engineer

This role exists to strengthen the depth and resilience of Plessey's infrastructure capability. We operate a mature on-premises estate spanning virtualisation, hyper-converged infrastructure, container platforms, and enterprise identity-and are actively expanding our cloud presence to support business-critical platforms. You will work alongside an experienced infrastructure team, bringing senior-level platform knowledge and the ability to operate in a modern, DevOps-informed way-using code, automation, and pipelines to build and operate infrastructure reliably and at scale. This is not a pure DevOps role. We need someone with strong infrastructure fundamentals who works in a structured, automated way and has the appetite to grow our cloud and IaC capability alongside the team.

• Administer and support Windows Server environments, including Hybrid Azure AD, Group Policy, DNS, and DHCP across the estate.
• Manage VMware virtualisation platforms.
• Support the ongoing Nutanix HCI implementation, including post-migration operational support.
• Maintain and develop on-premises Kubernetes clusters supporting manufacturing execution systems.
• Maintain Linux-based infrastructure underpinning core services and container workloads.
• Support Intune and Microsoft 365 endpoint and platform configuration.
• Manage and grow AWS environments, including platforms supporting YieldWerx and other cloud-hosted services.
• Develop and maintain Infrastructure as Code using Terraform and/or Bicep.
• Build and maintain CI/CD pipelines using GitHub Actions to automate infrastructure deployment and configuration.
• Ensure cloud resources are provisioned securely, consistently, and cost-effectively.
• Contribute to security standards, patching schedules, and system hardening across all platforms.
• Version-control infrastructure configuration and changes using Git.
• Produce and maintain clear, accurate technical documentation.
• Provide senior technical guidance and share knowledge to reduce operational single points of failure.
• Participate in on-call and incident response activities as required.

• Proven experience in a senior infrastructure engineering role.
• Strong hands-on expertise with Windows Server, Active Directory, and Hybrid Azure AD.
• Experience administering VMware vSphere in production environments.
• Solid Linux administration experience (RHEL, Ubuntu, or equivalent).
• Practical, hands-on Kubernetes experience including deployment, operations, and troubleshooting.
• Demonstrable AWS experience including EC2, S3, VPC, IAM, and core platform services.
• Working knowledge of Infrastructure as Code using Terraform.
• Experience with CI/CD tooling such as GitHub Actions or equivalent platforms.
• Strong scripting capability in PowerShell, Bash, or Python.
• Confident working with Git and version-controlled infrastructure.
• Takes ownership and drives issues through to resolution independently.
• Works methodically under pressure and effectively balances competing priorities.
• Actively shares knowledge and reduces reliance on single points of expertise.
• Communicates clearly with both technical and non-technical stakeholders.
• Comfortable working in an environment transitioning from traditional on-prem infrastructure to a more modern, automated, cloud-centric model.

Advantage

• Experience with Nutanix HCI or similar converged infrastructure platforms.
• Microsoft Azure experience (IaaS, PaaS, Intune, M365).
• Familiarity with Aruba networking or Fortinet firewall platforms.
• Relevant certifications: AWS SysOps Administrator, CKA, AZ-104, or equivalent.
• Experience with monitoring and observability tooling (Prometheus, Grafana, or similar).
• Background in a manufacturing, semiconductor, or regulated environment.

• Pension scheme
• Private medical & dental insurance
• 28 days' holiday + bank holidays
• Free onsite meals
• Onsite gym
• Relocation support