Senior Infrastructure Administrator - Telecommunications

Are you looking for an exciting new opportunity?

Join a trusted telecommunications provider delivering future-focused connectivity solutions for residential and business customers. During a significant period of growth, the organisation offers the opportunity to take ownership of long-term network strategy, lead a multi-disciplinary team, and contribute to expansion plans and executive-level decision-making.

The Organization is seeking a Senior Infrastructure Administrator to lead the design, security and long-term strategy of its enterprise IT infrastructure. This is a senior hands-on technical role combining architecture, leadership and operational ownership across Microsoft, virtualization, networking and security technologies.

• Own the architecture and strategy for Windows Server and Active Directory environments.
• Lead Microsoft 365, Entra  identity management initiatives.
• Design and maintain Linux server standards and security baselines.
• Develop Cisco network architecture, routing, switching and segmentation strategies.
• Manage Ubiquiti network infrastructure across multiple locations.
• Lead network security initiatives including firewalls, VPNs, Zero Trust and MFA.
• Design and maintain Hyper-V and Proxmox virtualization environments.
• Drive vulnerability management, patching and infrastructure security.
• Act as the highest technical escalation point for complex infrastructure issues.
• Mentor and support junior infrastructure team members.
• Manage core infrastructure services including DNS, DHCP and monitoring platforms.
• Oversee endpoint management, Microsoft Intune and security tooling.
• Maintain infrastructure documentation, diagrams and technical standards.
• Partner with IT leadership on budgeting, vendor management and technology roadmaps.

• 5+ years of infrastructure, systems or network administration experience.
• Strong Windows Server and Active Directory administration.
• Experience with Microsoft 365, Entra  Azure AD.
• Hands-on Cisco networking experience.
• Experience with Ubiquiti networking solutions.
• Strong virtualization experience with Hyper-V, Proxmox or VMware.
• Linux administration experience.
• Strong understanding of network security, firewalls and vulnerability management.
• Experience leading projects and mentoring technical teams.
• Excellent troubleshooting, documentation and communication skills.

• Power Shell or Bash scripting.
• Backup and disaster recovery solutions such as Veeam.
• AWS or Google Cloud experience.
• SQL, Oracle or ERP application support.
• Cisco CCNP or Microsoft Azure certifications.
• Security+ or Linux+ certifications.
• Previous experience leading a small infrastructure team.

• Hybrid working environment.
• Comprehensive healthcare and retirement benefits.
• Professional development and certification support.
• Opportunity to influence infrastructure strategy and technology direction.
• Clear progression into senior technical leadership.

• $100,000 - $120,000 salary depending on experience.