Senior Network Infrastructure Specialist

PARETO SECURITIES AS; Denmark; On-site; DKK 1,000,000 - 1,400,000; Full time

Job summary

Aeven, based in Denmark, seeks a Senior Network Infrastructure Specialist to maintain and troubleshoot Nokia equipment and optical DWDM infrastructure in a 2nd-line Captive team. The role focuses on ensuring high availability, stability, and performance of mission-critical infrastructure for our customer.

A valid security clearance is a prerequisite for this position. Fluent Danish and English are required, and you will participate in on-call rotations to support incidents.

Qualifications

• Hands-on experience operating Nokia routers/switches in large transport or service networks.
• Experience with DWDM systems—prefer Ribbon; training provided.
• Proficiency with Nokia CLI and related tooling.
• Solid knowledge of BGP, OSPF/IS-IS, MPLS, L2VPN/L3VPN, and Segment Routing.
• Experience with management platforms such as Nokia NFM-P; ITIL-based practices.
• Nokia Network Routing Specialist/Service Router certification or equivalent preferred.
• ITIL certification or demonstrable ITIL experience.
• Willingness to participate in on-call rotation.

Responsibilities

• Perform daily maintenance of Nokia routers (7210, 7705, 7050) and DWDM systems.
• Lead 2nd/3rd-level troubleshooting on IP and transport layers; coordinate with vendors.
• Plan and execute routine software upgrades, patches, and config changes.
• Participate in service windows (night/weekend) to minimize disruption.
• Produce risk analyses and performance reports; optimize QoS and TE parameters.
• Maintain documentation, network diagrams, and monthly operational reports.
• Operate according to ITIL processes within ServiceNow; support on-call rotation.

Skills

Nokia routers/switches

DWDM systems (Ribbon)

Nokia CLI

BGP, OSPF/IS-IS, MPLS

L2VPN/L3VPN, Segment Routing

ITSM/Nokia NFM-P

ITIL or ITIL-based practices

Cisco CCNP/CCIE (bonus)

On-call rotation readiness

Tools

NFM-P

Nokia NFM-P/NMS Lightsoft

NMS Lightsoft

Job description

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

At Aeven, we’re on a mission to keep digital infrastructure critical to the lives of millions, safe, secure, and productive. And to do this, we need sharp minds, capable hands, and most importantly, positive personalities that are eager to collaborate, contribute, develop their skills, and make a difference.

When you join Aeven, you join a culture of expertise, inclusion, and growth where people matter. Your professional growth is valuable to us, and we will support you all the way – whether you ’re interested in developing greater depth within your area of expertise, want to broaden your scope of skills, or wish to pursue new roles in our organization.