Senior Infrastructure Engineer

Key Responsibilities

• Administer and support Plessey’s on-premise infrastructure, including Windows Server, Active Directory, VMware, Linux, storage and Kubernetes.
• Support and maintain networking, firewall, Intune and M365 platforms across the estate.
• Manage patching, vulnerability remediation and security hardening across infrastructure and endpoints.
• Support and maintain existing AWS and Azure workloads, with a focus on secure, efficient and cost-effective infrastructure.
• Develop and extend Kubernetes across on-premise and cloud environments, using Infrastructure as Code and CI/CD tooling.
• Contribute to infrastructure and IT projects, delivering solutions that meet business requirements.
• Produce clear technical documentation and share knowledge across the IT team to build resilience and reduce single points of failure.
• Provide senior technical guidance and support with incident response and on-call activities as required.

Skills, Knowledge & Expertise

• Proven experience in a senior infrastructure engineering role, ideally within an on-premise environment.
• Strong hands-on experience with Windows Server, Active Directory and Hybrid Azure AD.
• Experience administering VMware vSphere in a production environment.
• Strong experience with SAN and storage technologies.
• Good Linux knowledge, ideally RHEL or equivalent.
• Working knowledge of networking and firewall administration.
• Experience supporting AWS or Azure cloud environments.
• Practical experience administering Kubernetes, particularly on-premise clusters.
• Strong scripting skills in PowerShell or Bash.
• Good understanding of infrastructure security, patching and vulnerability management.
• Strong communication and documentation skills, with the ability to explain technical information clearly to a wider audience.
• Willingness to travel occasionally to other office locations as required.

• Experience with Infrastructure as Code, such as Terraform or Bicep, and CI/CD tooling such as GitHub Actions.
• Experience with hyper-converged infrastructure, such as Nutanix.
• Experience with monitoring and observability tools such as Prometheus or Grafana.
• Relevant infrastructure or cloud certifications.
• Experience working within an operational technology or manufacturing environment.

Benefits

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