Senior Network Engineer.

Senior Network Engineer

Eir Business is seeking a Senior Network Engineer to join our dedicated Managed Services team supporting a key enterprise customer. This is a senior technical role acting as an escalation point, responsible for resolving complex network and security incidents, optimising environments, and ensuring reliable service delivery.

Experience with networking and security concepts is essential, with particular focus on Palo Alto, along with hands-on exposure to technologies such as Aruba WLAN, Cisco LAN, WAN, WLAN and network security platforms. A proactive approach to continuous improvement and the ability to operate within ITIL-based incident and change management processes are key to success in this role:

eir Business is the B2B division of eir and one of Ireland's leading providers of telecommunications, technology, cloud, cybersecurity, managed IT and workplace solutions. Supporting organisations of all sizes, from SMEs to large enterprises and public sector bodies, eir Business delivers secure, end-to-end connectivity and digital transformation services that help customers operate more efficiently, securely and effectively. Leveraging Ireland's largest mobile network, extensive fixed-line infrastructure, cloud capabilities and 24/7 expert support, eir Business partners with customers to design, implement and manage technology solutions that enable innovation, productivity and business growth.

• Act as senior escalation for network/security incidents

• Lead root cause analysis and resolution

• Manage Palo Alto firewalls (policy, NAT, VPNs)

• Support Aruba switching, controllers, and Wi-Fi

• Support LAN/WAN/WLAN environments

• Perform changes, upgrades, and migrations

• Follow ITIL processes and maintain documentation

• Participate in on-call rota and major incident response

• 5+ years networking experience

• Strong Palo Alto firewall experience

• Experience with Aruba networking (switching/wireless)

• Strong routing & switching skills (OSPF, TCP/IP, VLANs)

• VPN technologies (IPSec, remote access)

• ITIL / managed services experience

• Strong troubleshooting skills

Desirable Skills

• Cisco CCNA/CCNP

• Palo Alto certs (PCNSE/PCNSA)

• Aruba certs

• Cloud networking (Azure/AWS)

• SD-WAN exposure

Key Competencies

• Strong problem-solving

• Ability to work in high-pressure environments

• Excellent communication skills

• Customer-focused mindset