Senior Infrastructure Engineer - Hybrid Cloud & On-Prem

Fruition Group Ireland; Dublin; Hybrid; EUR 90,000 - 130,000; Full time

Job summary

Fruition Group Ireland seeks a Senior Infrastructure Engineer in Dublin on a permanent, hybrid basis. The role spans on‑premise, cloud, and hybrid environments with a strong Microsoft focus.

You will manage core infrastructure services, secure and optimize the technology estate, and provide senior-level support across Windows Server, Active Directory, AD, and Microsoft 365. The position emphasizes automation through PowerShell and collaboration with various teams.

Qualifications

• 5+ years in a Senior Systems Administrator/Infrastructure Engineer role.
• Hands-on with Windows Server and Microsoft infrastructure technologies.
• Strong AD, GPO, DNS, DHCP knowledge.
• Strong Microsoft 365 administration: Exchange Online, SharePoint, Intune, Entra ID.
• Strong Azure administration in hybrid environments.
• Experience with VMware and/or Hyper‑V virtualization.
• Strong networking knowledge: TCP/IP, DNS, DHCP, VLANs, VPNs, routing, switching.
• Infrastructure and security best practices: MFA, Conditional Access, vulnerability remediation, endpoint security, firewalls, VPNs.
• Backup, disaster recovery, and business continuity experience.
• PowerShell scripting and automation experience.
• Experience handling complex L3 escalations and troubleshooting.
• Strong documentation and stakeholder management.

Responsibilities

• Manage, maintain, and support Microsoft infrastructure across on-premise and cloud environments.
• Administer Windows Server, Active Directory, Group Policy, DNS, and DHCP.
• Manage the Microsoft 365 environment (Exchange Online, SharePoint, Intune, Entra ID).
• Administer Microsoft Azure, including hybrid infrastructure environments.
• Manage virtualised environments using VMware and/or Hyper-V.
• Support and troubleshoot networking technologies (TCP/IP, VLANs, VPNs, routing, switching).
• Provide advanced L3 support, resolving complex infrastructure incidents.
• Implement and maintain infrastructure security controls (MFA, Conditional Access, endpoint security, firewalls, VPNs, vulnerability remediation).
• Manage backup, disaster recovery, and business continuity solutions and processes.
• Develop PowerShell scripts and automation to improve efficiency.
• Monitor infrastructure performance, availability, capacity, and security.
• Maintain technical documentation and infrastructure records.
• Collaborate with stakeholders, third-party vendors and other teams on projects.

Skills

5+ years experience

Windows Server

Active Directory

Group Policy

DNS

DHCP

Microsoft 365 administration

Exchange Online

SharePoint

Intune

Entra ID (Azure AD)

Azure administration

VMware/Hyper-V

Networking TCP/IP/VLANs/VPN

PowerShell scripting

L3 incident troubleshooting

Tools

Docker

Kubernetes

SCOM

Nagios

Zabbix

Prometheus

Azure Monitor

Job description

Fruition Group Ireland seeks a Senior Infrastructure Engineer in Dublin on a permanent, hybrid basis. The role spans on‑premise, cloud, and hybrid environments with a strong Microsoft focus.

You will manage core infrastructure services, secure and optimize the technology estate, and provide senior-level support across Windows Server, Active Directory, AD, and Microsoft 365. The position emphasizes automation through PowerShell and collaboration with various teams.