Senior Core Network Engineer – IP/MPLS & 3GPP (EPC)

Inetum is a European leader in digital services. Inetum’s team of 28,000 consultants and specialists strive every day to make a digital impact for businesses, public sector entities and society. Inetum’s solutions aim at contributing to its clients’ performance and innovation as well as the common good.  

Present in 19 countries with a dense network of sites, Inetum partners with major software publishers to meet the challenges of digital transformation with proximity and flexibility.  

Driven by its ambition for growth and scale, Inetum generated sales of 2.5 billion euros in 2023.  

We are looking for a highly Senior Core Network Engineer – IP/MPLS & 3GPP (EPC) to provide specialized technical services in critical network environments. The goal of this role is to reinforce the operation, evolution, and resilience of the infrastructure, ensuring high standards of availability, security, and alignment with network engineering best practices.

This position requires a high level of autonomy, strong advanced troubleshooting capabilities, and the ability to support technical decision‑making in high‑complexity and mission‑critical scenarios.

Key Responsibilities:

Data Center Network Infrastructure Management

• Operation, monitoring, and continuous evolution of data center network infrastructures
• Technical support for high‑availability and resilient architectures
• Execution of technical tests and connectivity validations in production and pre‑production environments
• Administration and support of unified communications solutions, namely Cisco CallManager
• Management and operation of access control and identity platforms, including Cisco ISE
• Ensuring the continuity, performance, and quality of supported services

Network Security and Traffic Control

• Creation, modification, and validation of firewall rules in Cisco, Fortinet, and Check Point environments
• Impact analysis, risk mitigation, and support for security requirements
• Support in the resolution of network security incidents

Transport and Backbone Networks

• Operation and monitoring of IP/MPLS networks
• Technical support for DWDM infrastructures
• Analysis of link performance, stability, redundancy, and overall backbone quality

Specialized Technical Support and Advanced Troubleshooting

• Diagnosis and resolution of complex network incidents
• Execution of tests, technical trials, and high‑criticality validations
• Coordination with internal teams and technology vendors, particularly in NOKIA and CISCO environments
• Technical support for decision‑making in critical and high‑pressure operational contexts

• Senior profile with over 10 years of experience in network engineering, with solid expertise in critical environments, including engineering and/or operations roles within 3GPP (EPC) environments and MPLS networks.
• Bachelor’s degree in Telecommunications Engineering
• Proven experience in:• IP/MPLS networks (core and transport)
• Data center infrastructures
• High‑availability and mission‑critical environments

• Strong expertise in the following technologies and platforms:• Cisco (Routing, Switching, CallManager, ISE)
• NOKIA (core and transport environments)
• Firewalls: Cisco, Fortinet, and Check Point
• DWDM infrastructures

• CCNP Service Provider certification
• Relevant experience in core operations and advanced‑level troubleshooting
• Ability to execute technical tests, validations, and impact analysis

Personal Skills:

• High level of autonomy, ownership, and technical maturity
• Strong analytical skills and ability to solve complex problems
• Clear and effective communication in technical and critical environments
• Ability to work under pressure while maintaining service quality and stability
• Strong collaboration skills with multidisciplinary teams and external vendors
• Focus on best practices, risk mitigation, and continuous infrastructure improvement

• Workplace type: Hybrid (max. of 3 times per week in the office) or Remote
• Location: Picoas, Lisboa