Network Operations Engineer II

Astreya; Dublin; Hybrid; EUR 51,000 - 63,000; Full time

Job summary

Astreya in Dublin, Ireland, is seeking a Network Operations Engineer II to join a 24x7 NOC. You will troubleshoot optical (DWDM/CWDM) and IP (IPv4/IPv6, MPLS, BGP, OSPF) networks, coordinate with vendors, and drive restoration with precise communication.

You will mentor junior engineers, improve runbooks, and participate in planned maintenance, change execution, and post-incident reviews to reduce outages and improve service reliability.

Qualifications

• 3–5 years in network operations with optical and/or IP networks.
• Solid knowledge of TCP/IP, BGP, OSPF, MPLS, IPv4/IPv6.
• Hands-on experience with multi-vendor equipment CLIs and management systems.
• Strong documentation and communication skills.

Responsibilities

• Incident management and advanced troubleshooting across optical and IP networks.
• Own incidents end-to-end with stakeholder updates.
• Plan and perform scheduled maintenance and network changes.
• Mentor junior engineers and improve runbooks.

Skills

IP routing

Troubleshooting

Documentation

24x7 shift

Vendor liaison

Education

Bachelor's degree in a technical field

Tools

Cisco

Juniper

Ciena

Nokia

Infinera

Job description

## Network Operations Engineer IIApply: Dublin, Ireland: Full time: Posted Today: R0017648**Job Title: Network Operations Engineer II – (Optical and IP Engineer)** **Job Overview:**The Network Operations Engineer II is an experienced technical role responsible fortroubleshooting, restoring, and maintaining the health of Optical and IP networks in a 24x7operational environment. This role serves as the primary escalation point for Network OperationsEngineers I and works closely with Engineers III and Team Leads to resolve complex incidentsand improve operational processes.This role combines hands-on execution with independent judgment. Engineers II are expected toown incidents from detection through restoration, perform in-depth multi-vendor troubleshooting,execute scheduled network changes, and mentor junior engineers, escalating only the mostcomplex, cross-domain, or high-risk issues. **Scope:**• Serve as the second-level escalation point for optical and IP network incidents and alarms.• Independently troubleshoot and restore service for complex incidents across optical transportand IP routing domains.• Own incidents end-to-end, including stakeholder communication, vendor engagement, andpost-incident follow-up.• Plan and execute scheduled maintenance activities and network changes within changemanagement procedures.• Author and improve runbooks, procedures, and knowledge-base content.• Mentor and guide Network Operations Engineers I. **Roles and Responsibilities:****Incident Management & Advanced Troubleshooting**• Receive and resolve escalations from Network Operations Engineers I, providing technicaldirection during active incidents.• Perform in-depth troubleshooting of optical (DWDM, CWDM) and IP (IPv4/IPv6, MPLS, BGP,OSPF) networks, including analysis of optical power levels, OSNR, BER/FEC counters,routing tables, protocol adjacencies, and traffic paths.• Isolate faults across layers and domains (fiber, optics, transport, routing) and drive incidents torestoration.• Act as incident owner for major service-impacting events on shift, coordinating technicalresources and providing timely updates to Team Leads and stakeholders.• Escalate highly complex, architectural, or cross-organizational issues to Network OperationsEngineers III, Engineering, or the Team Lead with clear diagnostic findings.**Ticket, Case & Problem Management**• Ensure accurate, detailed documentation for all cases worked, and review ticket quality forEngineers I.• Open and manage cases with vendor TACs (e.g., Cisco, Juniper, Ciena, Nokia, Infinera),supplying logs, diagnostics, and technical detail to accelerate resolution.• Perform root cause analysis (RCA) for significant incidents and contribute to post-incidentreports and corrective action tracking.• Identify recurring issues and trends, and recommend preventive or corrective actions.• Validate service stability after restoration and confirm SLA adherence.**Maintenance & Change Execution**• Plan, prepare, and execute scheduled maintenance activities and network changes, includingmethod-of-procedure (MOP) review, pre/post checks, and rollback planning.• Participate in change review processes and assess operational risk of proposed changes.• Support turn-up, testing, and acceptance of new circuits, services, and network elements.• Coordinate with field technicians, colocation facilities, ISPs, and service providers duringmaintenance and restoration activities.**Mentorship, Process Improvement & Collaboration**• Mentor, shadow, and train Network Operations Engineers I, leading knowledge-transfersessions.• Author, review, and maintain runbooks, procedures, and knowledge-base articles.• Recommend improvements to monitoring, alarm correlation, and NOC tooling to reduce noiseand improve detection.• Identify opportunities for scripting or automation of repetitive operational tasks.• Lead shift handoffs and produce clear, complete shift-turnover documentation.• Collaborate with Engineering, Planning, and other operational teams to resolve systemicissues. **Required Qualifications & Skills**• Associate's or Bachelor's degree in a technical field, or equivalent practical experience.• 3–5 years of experience in network operations, with hands-on experience supporting opticaland/or IP networks in a NOC or carrier environment.• Solid working knowledge of IP routing and switching (TCP/IP, BGP, OSPF, MPLS, IPv4/IPv6,LLDP).• Working knowledge of optical transport technologies (DWDM, CWDM, fiber types, optics,amplifiers, patch panels) and the ability to interpret optical performance data.• Hands-on experience with multi-vendor equipment (e.g., Cisco, Juniper, Ciena, Nokia,Infinera) and their CLIs and management systems.• Proven ability to troubleshoot complex incidents independently and make sound decisionsunder pressure.• Experience working with vendor TACs, carriers, and service providers.• Strong documentation, written, and verbal communication skills, including communicating withnon-technical stakeholders.• Ability to work effectively in a 24x7 shift-based operational environment. **Preferred Qualifications**• Professional-level certifications such as CCNP, JNCIS/JNCIP, Nokia NRS II, or equivalent;vendor optical certifications (e.g., Ciena, Nokia, Infinera) a plus.• Experience with fiber testing tools (OTDR, power meters, light sources) and interpretingresults.• Scripting or automation experience (e.g., Python, Ansible) for operational tasks.• Experience with ITIL-based incident, problem, and change management processes.• Familiarity with NOC monitoring, alarm correlation, and ticketing platforms.• Prior experience mentoring or training junior engineers. **Physical Demands & Work Environment**• Ability to perform office-related tasks, including prolonged sitting or standing.• Capability to move within an office environment and effectively use a computer.• Must have strong communication skills for effective collaboration and coordination.• Occasional repetitive motions of the wrists, hands, and/or fingers may be required.• Availability to work rotating shifts, including nights, weekends, and holidays as required in a24x7 environment.**Salary Range**50,640.00 - 63,300.00 EUR (Annual)