Senior Network Administrator

About the role

The Senior Network Administrator reports to the Network Manager and is responsible for designing, operating, securing and optimising the organisation's physical and virtual network infrastructure. The role covers advanced network operations, complex incident resolution, large-scale infrastructure projects and strict adherence to security and quality management frameworks (QMS and ISMS).

Key responsibilities

• Design, implement and maintain secure, scalable, high-availability network solutions.
• Lead network infrastructure projects such as upgrades, migrations and architectural improvements.
• Administer and resolve IT tickets (incidents, service requests, changes and problems) with full documentation and SLA compliance.
• Implement network security controls, including attack mitigation, threat containment and incident response.
• Manage and tune network monitoring systems, perform root cause analysis and implement corrective actions.
• Configure, validate and monitor backups of critical systems and take part in disaster recovery.
• Contribute to network architecture design, capacity planning and performance optimisation.
• Develop, review and enforce network security policies and automate monitoring, reporting and operational tasks where possible.
• Train end users on network usage and security best practices, including via Moodle, and keep network diagrams and documentation up to date.
• Support technical evaluations, vendor coordination and solution validation, and complete required training or certifications.
• Execute and approve critical configuration changes and security policy updates, and lead responses to security incidents and major service disruptions.

Required profile

• Minimum of 2 years of hands-on experience administering physical and virtual network infrastructures.
• Proven analytical and troubleshooting capabilities.
• CCNA or equivalent certification; additional certifications may be required depending on organisational needs.

Required skills

• Advanced knowledge of routing, switching, VLANs, VPNs, BGP and firewall technologies.
• Strong experience in network security, monitoring and incident response.