Lead 4G/5G Core Network Specialist (Multi-Vendor)

Welvaart; Riyadh; On-site; SAR 240,000 - 360,000; Full time

Job summary

Welvaart is seeking an experienced Core Network engineer to ensure stability, performance, and reliability of 4G/5G networks. You will troubleshoot EPC/5GC components, resolve high-priority incidents, and collaborate with Huawei and Nokia for deep issue resolution.

The role requires 8+ years in Core Network, strong protocol knowledge (GTP/ Diameter/ SIP/ S1AP/ NGAP), and a track record in NOC environments. Rotation between Riyadh and remote work is part of the schedule.

Qualifications

• 8+ years of experience in Core Network (4G/5G) operations and troubleshooting.
• Hands-on experience with EPC/5GC components (MME, SGW, PGW, AMF, SMF, UPF, IMS).
• Experience in multi-vendor environments (Huawei, Nokia preferred).
• Strong understanding of telecom protocols (GTP, Diameter, SIP, S1AP/NGAP).
• Experience handling critical incidents and working in NOC environments.
• Familiarity with KPI analysis and performance monitoring.

Responsibilities

• Perform advanced troubleshooting across EPC and 5GC components.
• Investigate and resolve high-priority incidents impacting core services.
• Analyze signaling flows to identify root causes of degradation.
• Support incident triage and escalation as L2/L3 expert within NOC.
• Collaborate with vendors for deep technical resolution and patch validation.
• Review and validate core network architecture and integration with RAN and IT.
• Identify performance bottlenecks and optimization opportunities.
• Contribute to RCA documentation and corrective actions.
• Ensure adherence to operational procedures in core network management.
• Support change validation and risk assessment for planned activities.
• Provide technical guidance to L1/L2 engineers and knowledge transfer.
• Monitor KPIs and recommend improvements aligned with service targets.

Skills

Core Network

EPC/5GC

4G/5G

Troubleshooting

L2/L3 support

Scripting (Python)

Vendor coordination

GTP/Diameter/SIP

S1AP/NGAP

Multi-vendor (Huawei/Nokia)

Education

Bachelor's degree in Telecommunications, Computer Science, Electronics

Tools

Performance monitoring tools

Job description

Welvaart is seeking an experienced Core Network engineer to ensure stability, performance, and reliability of 4G/5G networks. You will troubleshoot EPC/5GC components, resolve high-priority incidents, and collaborate with Huawei and Nokia for deep issue resolution.

The role requires 8+ years in Core Network, strong protocol knowledge (GTP/ Diameter/ SIP/ S1AP/ NGAP), and a track record in NOC environments. Rotation between Riyadh and remote work is part of the schedule.