We are seeking an experienced Active Directory SME / Infrastructure Engineer to join a leading enterprise environment. This role requires deep expertise across Windows Server, Active Directory, Azure Entra ID, and virtualisation platforms such as VMware and Hyper‑V.
You will be responsible for maintaining the stability, security, and performance of critical infrastructure systems, working closely with internal teams and external vendors to ensure seamless operations across a complex IT landscape.
Key Responsibilities
Windows Server Administration
* Troubleshoot OS‑related issues, including unexpected restarts, performance degradation, and system bottlenecks
* Manage user access and permissions
* Oversee server commissioning and decommissioning
* Perform patching and vulnerability remediation
* Execute backup and restoration activities using approved tools
* Ensure high availability and operational stability of Windows environments
* Administer Active Directory (users, groups, and organisational units)
* Configure and maintain Group Policy Objects (GPOs)
* Manage DNS records, troubleshooting, and maintenance
* Administer DHCP scopes, reservations, and configurations
* Manage FTP services on Windows platforms
* Oversee SSL certificate lifecycle management (issuance, renewal, revocation)
* Deploy and manage Azure services, including Logic Apps and related components
Virtualisation (VMware / Hyper‑V)
* Maintain and monitor virtual infrastructure health
* Create and configure virtual machines, including optimisation of resources
* Manage snapshots, load balancing, and troubleshooting
* Conduct performance assessments and environment health checks
* Configure and manage HA/DRS clusters for resilience and failover
* Administer virtual networking, storage, and data stores
* Install and onboard ESXi/ESX hosts
* Support Hyper‑V environments where applicable
* Act as the primary liaison for Microsoft, VMware, and other vendors
* Coordinate incident resolution, escalations, and support requestsEnsure timely communication and resolution of infrastructure issues
* 8+ years’ experience in infrastructure engineering or a similar role
* Strong expertise in Windows Server administration
* Extensive experience with Active Directory and Azure Entra ID
* Proven experience managing VMware or Hyper‑V environments
* Strong knowledge of DNS, DHCP, and core networking principles
* Experience with patch management, vulnerability remediation, and backup/restore processes
* Hands‑on experience with SSL certificate management
* Excellent troubleshooting and problem‑solving skills
* Ability to work effectively in fast‑paced, enterprise environments
* Strong communication skills with experience working across technical teams and vendors
* Experience administering FTP services on Windows
* Knowledge of Azure services and cloud‑based infrastructure
* Understanding of enterprise security best practices
* Familiarity with large‑scale, highly regulated environments (e.g. utilities, finance)
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