Senior Windows Server Administrator - Southampton - £60k

Senior Windows Infrastructure Administrator - Southampton - £60k

About the Opportunity

A leading international organisation is seeking an experienced Senior Windows Infrastructure Administrator to join its IT operations team. This role is responsible for the design, support, optimisation, and continuous improvement of enterprise Windows infrastructure, ensuring high levels of performance, security, and availability across critical business systems.

The Role

As a Senior Windows Infrastructure Administrator, you will take a lead role in managing and enhancing enterprise server environments, supporting business-critical platforms, and contributing to strategic infrastructure initiatives. You will work closely with technical teams across the business to deliver reliable, scalable, and secure technology solutions.

The successful candidate will be expected to work onsite 5 days per week during the initial six-month onboarding and integration period. Following this, the role will transition to a hybrid working model of 4 days onsite and one day remote per week, subject to business requirements and performance.

Key Responsibilities

• Design, implement, and support complex Windows-based infrastructure solutions.

• Administer and troubleshoot enterprise server environments and virtualisation platforms.

• Lead investigation and resolution of major infrastructure incidents.

• Evaluate emerging technologies and make recommendations for improving operational efficiency and performance.

• Deliver infrastructure enhancements and lifecycle management activities.

• Ensure systems meet security, compliance, redundancy, and capacity requirements.

• Contribute to infrastructure roadmaps and long-term technology strategy.

• Develop automation scripts and tools to improve operational effectiveness.

• Provide technical leadership and mentorship to junior members of the infrastructure team.

• Participate in an on-call support rota for critical systems.

• Collaborate with internal stakeholders to deliver infrastructure projects and operational improvements.

• Maintain high-quality technical documentation and operational procedures.

Experience Required

• Significant experience administering enterprise Windows Server environments.

• Strong knowledge of server infrastructure design, operations, and troubleshooting.

• Experience supporting large-scale virtualised environments.

• Understanding of infrastructure security, resilience, and performance optimisation.

• Proven experience leading complex technical investigations and resolving major incidents.

• Scripting or automation experience using technologies such as PowerShell.

• Strong stakeholder management and communication skills.

• Experience working within structured change and governance frameworks.

• Ability to mentor and support less experienced engineers.

Desirable Skills

Experience with one or more of the following technologies would be advantageous:

• Citrix

• VMware

• Microsoft Endpoint Configuration Manager (SCCM/MECM)

• Microsoft Exchange

• Privileged Access Management solutions

• Enterprise monitoring platforms such as Zabbix

• Agile delivery environments

Candidate Profile

The successful candidate will be a proactive infrastructure professional who combines strong technical expertise with excellent problem-solving abilities. You will be comfortable operating in complex enterprise environments, influencing technical decisions, and driving continuous improvement across infrastructure services.

This role would suit a Senior Windows Administrator, Infrastructure Engineer, Systems Engineer, or Windows Platform Specialist looking to take ownership of a large-scale enterprise environment.

If interested to discuss this role in more detail, please reach out to