Telecommunications Network Operations Intern

About the role

1GLOBAL, a global mobile communications provider, is looking for a Telecommunications Network Operations Intern to join its Networks Operations team within the Service Assurance function. The team acts as a second-line technical support unit, working with Customer Services, Customer Success, Engineering, Product, vendors and NOC teams to troubleshoot and resolve customer-impacting network issues. The internship is based in Lisbon with a hybrid workplace and offers hands-on learning in telecom operations, incident handling and network troubleshooting.

Key responsibilities

• Support the investigation and troubleshooting of customer complaints on registration, voice, data, SMS and connectivity services.
• Assist with daily case handling, monitoring and incident follow-up.
• Analyse network faults using diagnostic tools, monitoring platforms, logs and protocol traces.
• Learn and support troubleshooting of signalling flows such as SS7, MAP, ISUP, SIP, CAP and DIAMETER.
• Escalate complex issues to senior engineers, engineering teams, vendors or NOC teams with clear context.
• Maintain records of incidents, troubleshooting steps, resolutions and follow-up actions.
• Support incident response, including impact assessment, updates and post-incident documentation.
• Contribute to root cause analysis and help ensure issues are handled in line with SLAs and operational KPIs.
• Create and maintain internal documentation, troubleshooting guides and knowledge articles.

Required profile

• Degree in progress or recently completed in Telecommunications Engineering, Computer Science, Network Engineering or a related field.
• Basic understanding of mobile networks, IP networking, telecom services or distributed systems.
• Interest in troubleshooting voice, data, SMS and network registration/attach flows.
• Good analytical and problem-solving skills, attention to detail and ability to organise work and follow priorities.
• Strong written and verbal English and comfort with remote teams and cross-functional stakeholders.
• Nice to have: previous internship or hands-on exposure in telecom, networking, monitoring or support; basic knowledge of mobile core, RAN, IoT, M2M, eSIM or roaming; experience with ticketing tools such as Jira or Salesforce; exposure to incident management or customer support.

What we offer

• Growth opportunities in a fast-growing telecom company.
• Professional development alongside industry experts.
• Opportunities to work in different 1GLOBAL offices around the world.