Level 3 Infrastructure Enguineer

Contract Type:

Permanent

Location:

Dublin   

Contact Name:

Ian Donnelly

Contact Email:

i.donnelly@masonalexander.ie

Date Published:

24-Feb-2026

We are seeking a motivated, self-driven  L3 Infrastructure Engineer  to provide advanced technical support across internal and hosted platforms in a fast-paced environment.

Responsibilities:

  • Provide Level 3 server and infrastructure support across multiple sites (remote).
  • Lead and deliver infrastructure projects.
  • Manage and support Windows Server environments (2016–2022), Active Directory (DNS, DHCP, GPO), VMware, and Dell infrastructure.
  • Support Microsoft technologies including Exchange, M365, and Azure AD.
  • Oversee backup, security, networking (TCP/IP, VPNs, firewalls, LAN/WAN), AWS (backup & DR), and related services.
  • Ensure compliance with ISO27001, SOX, NIST, and ITIL processes (incident, change, problem management).
  • Maintain configuration documentation and strong change control practices.

Requirements:

  • Degree in Computer Science or related discipline.
  • 4+ years’ infrastructure experience in a corporate environment.
  • Relevant certifications (MCP/MCSE/VMware) desirable.
  • Strong troubleshooting, analytical, and customer service skills.
  • Ability to work independently, manage priorities, and mentor others.
  • Flexible approach, including occasional out-of-hours support.
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