Senior Field Engineer (L3)

GCS Recruitment Specialists; Ireland; On-site; EUR 83,025 - 110,700; Full time

Job summary

GCS Recruitment is looking for an experienced Senior Field Engineer (L3) to support a large public sector organization on a long-term contract basis in Ireland. The role involves maintaining, improving, and securing core IT infrastructure across multiple sites, serving as a senior technical escalation point.

The ideal candidate will possess strong experience in infrastructure support and systems administration, with advanced knowledge of Windows Server, Active Directory, and networking technologies. This position offers a competitive daily rate and the potential for long-term engagement.

Qualifications

• 5+ years experience in a Level 3 Infrastructure Engineer or Senior IT Support role.
• Strong knowledge of Windows Server, Active Directory, DNS, DHCP, and TCP/IP.
• Proven experience delivering infrastructure projects and upgrades.

Responsibilities

• Provide Level 3 support across Windows Server, Active Directory, and networking.
• Administer and maintain Windows Server environments.
• Manage Active Directory, user provisioning, and access controls.
• Support backup, recovery, and endpoint security platforms.
• Troubleshoot complex infrastructure and system performance issues.

Skills

Windows Server

Active Directory

Networking

Endpoint Security

Troubleshooting

Stakeholder Management

Tools

Intune

SCCM

MDT

Job description

Senior Field Engineer (L3)

• Multi‑Site Environment
• 12‑Month Rolling Daily Rate Contract
• Competitive Daily Rate
• Public Sector Client

We are seeking an experienced Level 3 Field Engineer to join a large public sector organisation on a long‑term contract basis.

This is a predominantly Level 3 Infrastructure Support role, focused on maintaining, improving, and securing core IT infrastructure across multiple sites. You'll act as a senior technical escalation point, supporting both operational infrastructure and project delivery initiatives.

Key Responsibilities

• Provide Level 3 support across Windows Server, Active Directory, networking, and endpoint infrastructure.
• Administer and maintain Windows Server environments and core infrastructure services.
• Manage Active Directory, Group Policy, user provisioning, and access controls.
• Support backup, recovery, patch management, and endpoint security platforms.
• Troubleshoot complex infrastructure, networking, and system performance issues.
• Manage PC imaging, software deployment, and endpoint lifecycle management.
• Support infrastructure upgrades, migrations, and technology refresh projects.
• Work closely with vendors, stakeholders, and internal IT teams.
• Maintain technical documentation, diagrams, and asset records.

Required Experience

• Strong experience in a Level 3 Infrastructure Engineer, Systems Administrator, or Senior IT Support role.
• Advanced knowledge of:
  • Windows Server
  • Active Directory & Group Policy
  • DNS, DHCP, TCP/​IP
  • Switching & Network Troubleshooting
  • Backup & Disaster Recovery
  • Endpoint Security & Patch Management
• Experience delivering infrastructure projects and upgrades.
• Strong troubleshooting and stakeholder management skills.

Desirable

• Microsoft 365 Administration
• Intune, MDT, SCCM, or similar deployment tools
• Public Sector or Education experience
• Experience supporting multi‑site environments

12‑month rolling contract with strong long‑term potential and a competitive daily rate.

GCS is acting as an Employment Business in relation to this vacancy.