Senior Network Operations Engineer (Carrier/ISP)

PFH Technology Group; Limerick; On-site; EUR 80,000 - 120,000; Full time

Job summary

PFH Technology Group is seeking an experienced Level 3 Network Operations Engineer to join our Network Operations team in Ireland. The role focuses on supporting, maintaining, and troubleshooting large-scale ISP, carrier, and enterprise networks for high availability and reliability.

The ideal candidate will have strong experience with Cisco IOS/IOS-XE, Juniper Junos, Linux systems, Kubernetes, network automation, and operational support in complex service provider environments.

Qualifications

• Experience supporting large-scale ISP, carrier, or enterprise networks.
• Hands-on with Cisco IOS/IOS-XE, Juniper Junos, and multi-vendor infrastructure.
• Experience with carrier Ethernet tech including VLAN, QinQ, LACP, STP and Ethernet transport.
• Strong routing protocol knowledge: BGP, OSPF, MPLS, HSRP/VRRP.
• Proficient in Linux administration (RHEL/CentOS/Ubuntu) in production.
• Familiarity with Kubernetes environments and container troubleshooting.
• Knowledge of SNMP, Syslog, telemetry, and network monitoring tools.

Responsibilities

• Provide Level 2 and Level 3 operational support across large-scale networks.
• Troubleshoot routing, switching issues across multi-vendor platforms.
• Support Layer 2/3 technologies including VLANs, OSPF, BGP, and MPLS.
• Investigate incidents, degradations, and outages within SLAs.
• Perform network analysis with packet captures, SNMP, and telemetry.
• Coordinate changes and deployments through change management processes.
• Collaborate with Core, Access, Optical, Enterprise, and Vendor teams.

Skills

Large-scale networks

Cisco IOS

Juniper Junos

Linux administration

Kubernetes

Network automation

Packet analysis

BGP

OSPF

MPLS

Tools

Cacti

Oxidized

Job description

PFH Technology Group is seeking an experienced Level 3 Network Operations Engineer to join our Network Operations team in Ireland. The role focuses on supporting, maintaining, and troubleshooting large-scale ISP, carrier, and enterprise networks for high availability and reliability.

The ideal candidate will have strong experience with Cisco IOS/IOS-XE, Juniper Junos, Linux systems, Kubernetes, network automation, and operational support in complex service provider environments.