Senior Network Infrastructure Specialist

Role Overview

We are looking for a Senior Operations Specialist with solid experience in the maintenance, troubleshooting, and operation of Nokia network equipment (routers & switches) as well as optical DWDM infrastructure. In this role, you will be a central player in our 2nd-line Captive team, responsible for ensuring high availability, stability, and performance of mission-critical infrastructure for our customer.

A valid security clearance is a prerequisite for this position.

Your Responsibilities

Perform daily maintenance of Nokia routers (7210, 7705, 7050) via NFM-P and DWDM systems (Ribbon) via NMS Lightsoft

Carry out 2nd/3rd-level troubleshooting on both IP and transport layers (BGP, OSPF/IS-IS, MPLS, LSP protection) and coordinate with vendors—Nokia, Ribbon—and other operators for swift resolution

Plan and execute routine maintenance tasks (software upgrades, firmware patches, configuration changes, etc.)

Participate in scheduled service windows (night/weekend) and ensure minimal service disruption

Produce risk analyses when required

Use performance data to identify bottlenecks (latency, jitter, packet loss) and adjust QoS policies, TE parameters, and DWDM optimization settings (power level, dispersion compensation)

Maintain documentation, guides, and network diagrams, and contribute to the preparation of monthly operational reports and other reporting artefacts

Operate according to ITIL processes within the ITSM system ServiceNow

Participate in the on-call rotation, including the standby team for critical network incidents

Your Qualifications

Hard Skills

Hands-on experience operating Nokia routers/switches in large transport or service networks

Experience with DWDM systems—preferably Ribbon, though not mandatory (training and courses provided)

Proficiency with Nokia CLI

Solid knowledge of protocols: BGP, OSPF, IS-IS, MPLS, L2VPN/L3VPN, Segment Routing

Experience with management tools such as Nokia NFM-P and similar platforms

Certified as a Nokia Network Routing Specialist / Service Router (or equivalent)

ITIL certification or demonstrable experience in an ITIL-based environment

Cisco certifications (CCNP/CCIE) are a bonus

Willingness to participate in on-call rotation

Soft Skills

Strong technical background and genuine passion for network operations

Highly analytical mindset and a structured way of working

Ability to work under time pressure during critical fault-resolution situations, collaborating effectively with other engineers and management

Good communication skills, with the ability to provide clear, timely information both in the ITSM tool and to the Incident Manager and NOC team during major incidents

Fluent in Danish and English, both written and spoken

Lokation: Copenhagen

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