Ethernet & Optical Network Engineer — 24/7 Incident Resolver

Colt Technology Services; Barcelona; On-site; EUR 40,000 - 70,000; Full time

Job summary

Colt Technology Services is seeking an engineer to join the network operations environment, troubleshooting Ethernet and Optical faults across our European network. You will work through Layer 1 and Layer 2, with exposure to Layer 3 services where relevant, taking ownership from diagnosis to resolution.

You will keep customers informed with clear updates, collaborate with field teams and vendors, and contribute to long-term improvements. A 24/7 shift rotation is required.

Qualifications

• Hands-on experience troubleshooting Ethernet and/or Optical network services.
• Structured fault-finding approach to identify root causes.
• Experience working with operational network services prioritising availability.
• Clear communication of technical information to customers and teams.

Responsibilities

• Troubleshoot and resolve faults affecting Ethernet and Optical services across our European network.
• Work across Layer 1 and Layer 2 technologies, with exposure to Layer 3 services where relevant.
• Follow technical issues from initial diagnosis through to resolution, coordinating with specialist teams.
• Keep customers informed with clear, helpful updates.
• Collaborate with network partners, Field Maintenance and engineering teams to fix incidents.
• Identify recurring problems and contribute to longer-term improvements.
• Support root-cause investigations and produce technical incident reports.
• Assist planned network changes and software upgrades; participate in 24/7 shift rotation.

Skills

Ethernet networking

Optical networking

Troubleshooting

Layer 1 & 2 basics

Customer communication

Incident ownership

24/7 shift readiness

Tools

Netcool

SMARTS

InfoVista

Job description

Colt Technology Services is seeking an engineer to join the network operations environment, troubleshooting Ethernet and Optical faults across our European network. You will work through Layer 1 and Layer 2, with exposure to Layer 3 services where relevant, taking ownership from diagnosis to resolution.

You will keep customers informed with clear updates, collaborate with field teams and vendors, and contribute to long-term improvements. A 24/7 shift rotation is required.