Operations Engineer

Job title: Ericsson 5GC & CNIS Operational Engineer

Job location: Brussels, Belgium

Job duration: 2025-11-03 to 2026-12-31

Job hours: 40 hrs./week

Role description:

We are seeking a highly skilled and proactive Operational Consultant with deep expertise in Ericsson 5G Core (5GC) and the Cloud Native Infrastructure Solution (CNIS) to support the day-to-day operations of our mobile data network. The consultant will be embedded within our operational team and will play a key role in maintaining, troubleshooting, and evolving our Ericsson 5GC platform deployed on our telco-cloud and more specific on the new CNIS infrastructure.

Key Responsibilities

Perform daily operational tasks on the Ericsson 5GC and CNIS platforms, including:

Alarm monitoring and resolution

Configuration changes and updates

Health checks and performance tuning

Software upgrades and patching

Collaborate with internal teams and Ericsson support to resolve incidents and implement preventive measures.

Maintain and optimize CNIS components such as CCD (Cloud Container Distribution), PCC, PCG, and SDI infrastructure.

Support container lifecycle management, deployment and scaling of CNFs.

Participate in integration and migration activities, including onboarding of new network functions and services.

Document operational procedures and contribute to knowledge sharing within the team.

Technical Skills Required:

Ericsson 5GC Core: Deep understanding of the 5GC architecture, including AMF, SMF, UPF, UDM, AUSF, PCF, NRF, and NSSF.

CNIS Expertise: Hands-on experience with Ericsson CNIS platform. Spine/Leaf switches setup.

Cloud & Container Technologies:

Kubernetes

Bare-metal and virtualized deployments

CI/CD pipelines and automation tools

Networking & Security:

IP networking, VLANs, routing, firewall configuration

DDoS protection and monitoring

VPN and secure access protocols

Soft Skills & Behavioral Competencies

Operational Mindset: Strong sense of ownership and accountability for platform stability and performance.

Problem Solving: Analytical thinker with a proactive approach to troubleshooting and incident resolution.

Collaboration: Effective communicator who can work closely with cross-functional teams and external vendors.

Adaptability: Comfortable working in a dynamic environment with evolving technologies and priorities.

Knowledge Sharing: Willingness to mentor and transfer knowledge to internal team members.

Documentation: Ability to produce clear and concise operational documentation and reports.

Language:

English

Remarks:

Remote working is a possibility.

Ready to make a difference?

Apply now and start your journey with Team Possible! We want to get to know you.

After your application, we will verify your profile and get back to you within 3 working days.

If you’re successful, you can expect the following steps:

● an initial conversation with our recruiter - Swati Kumari

● 1st round of interview with HM

● Final round of interview with HM

About Proximus

We are Team Possible turning tech into opportunities.

We are driven by four core pillars: "I care," "I make a difference," "I radically simplify," and "I embrace the future". This means you'll join a team that genuinely cares for customers and colleagues, is empowered to make a real impact, strives to radically simplify complex challenges, and is always looking ahead to embrace the future of technology. We believe in an inclusive and safe environment where everyone can thrive, offering extensive career development resources, including access to over 5,000 training modules and a minimum of 5 days of training per year, to help you continuously learn, grow, and tackle bold challenges with us.