Ethernet & Optical Network Engineer - 24/7 Support

Colt Technology Services Group Ltd.; Lisboa; On-site; EUR 35,000 - 55,000; Full time

Job summary

Colt Technology Services Group Ltd. is seeking a Network Engineer to join its European Ethernet and Optical network operations. You will troubleshoot live services, own incidents end-to-end and collaborate with Colt teams, partners and vendors to restore services quickly.

You will gain broad exposure to network technologies and develop deeper expertise across Ethernet and Optical infrastructure while supporting 24/7 shift rotations in a fast-paced telecom environment.

Qualifications

• Experience troubleshooting Ethernet and/or Optical services in a live network environment.
• Strong understanding of Layer 1 and Layer 2 networking with structured fault diagnosis.
• Experience with carrier or service-provider networks.
• Ability to own incidents and coordinate across teams to reach resolution.
• Excellent communication skills to explain technical issues to customers and partners.
• Spanish and English at B2 level or above (CEFR).

Responsibilities

• Monitor, diagnose and resolve faults across Colt's European Ethernet and Optical network.
• Troubleshoot Layer 1, Layer 2 and relevant Layer 3 services and identify underlying causes.
• Own customer incidents end to end, providing clear updates and progressing resolution within SLAs.
• Work with Field Maintenance, technical teams, partners and vendors to resolve complex faults.
• Investigate recurring problems and contribute to reliability improvements.
• Produce clear technical reports and root-cause analyses after significant incidents.
• Support planned network activities, including software upgrades and technical changes.
• Participate in the team's 24/7 shift rotation.

Skills

Ethernet & Optical troubleshooting

Layer 1 & 2 networking

Incident ownership

Clear communication

Tools

Netcool

SMARTS

InfoVista

TACACS

Job description

Colt Technology Services Group Ltd. is seeking a Network Engineer to join its European Ethernet and Optical network operations. You will troubleshoot live services, own incidents end-to-end and collaborate with Colt teams, partners and vendors to restore services quickly.

You will gain broad exposure to network technologies and develop deeper expertise across Ethernet and Optical infrastructure while supporting 24/7 shift rotations in a fast-paced telecom environment.