Senior Network Support Engineer / Administrator (Data)Kilmainham, Dublin (Hybrid - minimum 2 days onsite weekly)Contract Start: July 2026, 12 months initial contract with further 12-month extension approved230 Days Per Year | Full-Time Contract Role
Are you an experienced network professional ready to take the lead in supporting one of Ireland's largest public sector enterprise network environments?
We are seeking a Senior Network Support Engineer / Administrator (Data) to join a major national organisation supporting critical infrastructure across 189 sites nationwide, serving over 7,000 users. This is an exciting opportunity to play a key role in designing, securing, and optimising a large-scale enterprise network while contributing to strategic initiatives including SD‑WAN, SASE, Zero Trust, and cybersecurity compliance.
About the Role
As a senior technical specialist, you will provide advanced expertise across network architecture, implementation, administration, and support. You will work on complex enterprise WAN, LAN, and Wi‑Fi infrastructure, ensuring resilient, secure, and high‑performing connectivity across a nationwide estate.
This role combines hands‑on engineering, technical leadership, project delivery, and mentoring responsibilities.
Key Responsibilities
Design, implement, and support enterprise WAN, LAN, and wireless networks
Troubleshoot and resolve complex network incidents and outages
Lead network upgrades, migrations, and infrastructure improvement projects
Configure and manage routing, switching, VLANs, IP addressing, and wireless systems
Administer secure network access controls including TACACS+, RADIUS, ACLs, and 802.1X
Support SD‑WAN, SASE, and Zero Trust adoption initiatives
Maintain DHCP, DNS, IP address management, and topology documentation
Deliver root cause analysis reports and performance optimisation reviews
Implement network monitoring and health checks using enterprise tools
Mentor junior engineers and provide technical escalation support
Contribute to ISO 27001 and NIS2 compliance activities
Required Experience & Skills
We're looking for a senior‑level engineer with strong experience in:
Core Networking
Complex enterprise network support and administration
Routing & switching
IP addressing and subnetting
VLANs
LAN/WAN technologies
Wireless networking
Network security
Platforms & Tools
HP Comware 7 switches
Aruba ClearPass (Policy Manager, Guest, Insight, TACACS+, RADIUS, 802.1X)
Microsoft DHCP and DNS
HP IMC
SolarWinds or equivalent monitoring tools
Modern Architecture
SD‑WAN deployment and support
SASE and Zero Trust concepts
VPNs, firewalls, secure remote access
Cloud‑integrated network services
Additional Strengths
Strong troubleshooting and root cause analysis capability
ITIL‑aligned service delivery experience
Vendor/OEM/ISP coordination experience
Technical documentation and runbook creation
Project leadership and migration planning experience
Qualifications
NFQ Level 8 qualification in Computer Science
CCNP
Aruba Certified ClearPass Professional (ACCP)
Working Pattern
Full‑time contract: 230 days annually
Monday to Friday, 8 hours per day
Working hours between 08:00 – 18:00 Irish time
Hybrid model currently includes minimum 2 onsite days weekly in Kilmainham
Additional onsite attendance may be required depending on business needs
Occasional out‑of‑hours support may be required
Why Apply?
This is a rare opportunity to work in a high‑impact senior network role supporting nationally critical infrastructure, where your expertise will directly influence the future of secure enterprise networking at scale.
If you thrive in complex environments and enjoy combining strategic design with hands‑on technical delivery, we'd love to hear from you.
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