Senior Core Network Engineer (Mobile Core, EPC & 5G Core) | SIS Global | Saudi Arabia

SIS Global; Saudi Arabia; On-site; SAR 280,000 - 420,000; Full time

Job summary

SIS Global in Saudi Arabia is seeking a Senior Core Network Engineer to lead operation, maintenance, and modernization of mobile core networks including CS Core, EPC, and 5G Core. You will drive performance, reliability, and service quality across voice and data services.

The role requires deep knowledge of telecom protocols, tracing, and configuration management, with a focus on high-availability carrier-grade operations and collaboration with cross-functional teams.

Qualifications

• Bachelor’s degree in a relevant field is required.
• Strong hands-on experience in Mobile Core Network Operations and Maintenance.
• Experience with MSC, MGW, HLR, HSS, UDC, EIR, PGW/UPG, UPF, and 5GC network functions.

Responsibilities

• Operate, maintain, and optimize mobile core network platforms across CS Core, EPC, and 5G Core environments.
• Monitor network health, alarms, traffic statistics, and service performance indicators.
• Perform end-to-end service tracing and advanced troubleshooting across voice and data services.
• Conduct fault isolation, root cause analysis, and service restoration activities.
• Support network configuration management and operational change implementation.
• Perform software upgrades, patch management, and platform lifecycle activities.
• Analyze network performance trends and implement optimization initiatives.
• Conduct capacity planning and resource utilization assessments.
• Support security audits, configuration audits, and compliance activities.
• Collaborate with engineering teams during new node integrations, expansions, and modernization projects.
• Prepare technical reports, operational documentation, and incident analysis reports.

Skills

Mobile Core Network Operations

EPC & 5G Core expertise

Fault management & RCA

End-to-end tracing

Configuration management

Software upgrades & patching

Capacity planning & optimization

Security & compliance reviews

Collaboration with cross-functional 팀

Excellent communication

Education

Bachelor’s Degree in Telecommunications Engineering, Electronics Engineering, Computer Engineering, Information Technology, or a related field

Job description

Job Title: Senior Core Network Engineer (Mobile Core, EPC & 5G Core) | SIS Global | Saudi Arabia

Recruiting Company: SIS Global

Job Location: Saudi Arabia

Job Type: Full-Time

Industry: Telecommunications | Mobile Core Networks | EPC | 5G Core

Experience Level: Senior Engineer

Position Summary

SIS Global is seeking a highly experienced Senior Core Network Engineer to support the operation, maintenance, troubleshooting, optimization, and evolution of mission-critical mobile core network platforms. The successful candidate will play a key role in ensuring network stability, service continuity, capacity readiness, and operational excellence across legacy, LTE, and 5G Core environments.

Detailed Job Description

As a Senior Core Network Engineer, you will be responsible for managing and optimizing a broad range of mobile core network elements spanning CS Core, EPC, and 5G Core architectures. You will provide technical leadership for fault management, root cause analysis, software lifecycle activities, performance optimization, and infrastructure governance. Working closely with Network Engineering, Solution Architecture, Customer Support, and Operations teams, you will ensure high network availability and rapid resolution of service-affecting issues. The role demands strong expertise in telecom protocols, end-to-end service tracing, configuration management, and core network modernization initiatives. This is an excellent opportunity for a telecom specialist to work within a large-scale operator environment supporting next-generation voice and data services.

Key Responsibilities

• Operate, maintain, and optimize mobile core network platforms across CS Core, EPC, and 5G Core environments.
• Monitor network health, alarms, traffic statistics, and service performance indicators.
• Perform end-to-end service tracing and advanced troubleshooting across voice and data services.
• Conduct fault isolation, root cause analysis, and service restoration activities.
• Support network configuration management and operational change implementation.
• Perform software upgrades, patch management, and platform lifecycle activities.
• Analyze network performance trends and implement optimization initiatives.
• Conduct capacity planning and resource utilization assessments.
• Support security audits, configuration audits, and compliance activities.
• Implement corrective actions to improve service quality and network reliability.
• Collaborate with engineering teams during new node integrations, expansions, and modernization projects.
• Prepare technical reports, operational documentation, and incident analysis reports.
• Support technical escalations and serve as a senior subject matter expert for core network operations.

Required Qualifications & Skills

• Bachelor’s Degree in Telecommunications Engineering, Electronics Engineering, Computer Engineering, Information Technology, or a related field.
• Strong hands-on experience in Mobile Core Network Operations and Maintenance.
• Proven expertise with MSC, MGW, HLR, HSS, UDC, EIR, PGW/UPG, UPF, and 5GC network functions.
• Strong understanding of Core Network architecture and service delivery mechanisms.
• Deep knowledge of telecom protocols, signaling, and interfaces supporting mobile core networks.
• Experience performing end-to-end tracing, fault isolation, and root cause analysis.
• Strong troubleshooting skills across voice, data, subscriber, and packet core services.
• Experience with configuration management, software upgrades, and patch implementation.
• Knowledge of network capacity management and performance optimization methodologies.
• Experience conducting security reviews and configuration audits.
• Ability to coordinate effectively with Network Engineering, Solution, Operations, and Customer Support teams.
• Strong analytical, problem-solving, and communication skills.
• Ability to operate within high-availability carrier-grade network environments.

Nice-to-Have Skills

• Experience with IMS, VoLTE, VoWiFi, and 5G Voice services.
• Knowledge of cloud-native network functions and telecom virtualization platforms.
• Experience with Ericsson, Huawei, Nokia, or Oracle core network solutions.
• Familiarity with Kubernetes, OpenStack, VMware, or containerized telecom environments.
• Experience supporting network transformation and 5G Core migration projects.
• Relevant vendor certifications in Core Network, EPC, IMS, or 5G technologies.

Recruitment Pro Tip

For Senior Core Network Engineering positions, hiring managers prioritize candidates who can demonstrate successful resolution of complex service-impacting incidents. Highlight specific examples involving MSC, HSS, PGW, UPF, or 5GC troubleshooting, large-scale software upgrades, performance optimization initiatives, and measurable improvements in network availability, service quality, or customer experience. Quantifiable operational achievements significantly increase your chances of securing interviews.