Mobile Voice Core Engineer

• Operate and maintain IMS, CS and EPC components, ensuring compliance with KPIs and SLAs.
• Monitor, perform configuration, upgrades, and patches for Mobile core network elements (MME, SGW, PGW, PCRF, HSS, HLR, SBC, CS Core and IMS nodes) working with other engineers.
• Monitor and analyse performance metrics to optimize capacity and quality of service.
• Troubleshoot complex issues across signalling protocols (Diameter, SIP, SS7, HTTPs) and resolve faults promptly.
• Manage IMS platforms and SIP-based services for mobile and fixed voice.
• Support Cloud Voice and FTTH voice solutions, ensuring seamless integration with IMS.
• Implement and maintain Microsoft Teams Operator Connect and related interworking functions.
• Ensure QoS and security compliance for all IMS-based services.
• Support roaming services and ensure IREG compliance.
• Maintain mobile support services such as SMS antifraud, voicemail, and SIM steering.
• Support the deployment of new SIP carrier interconnects and ongoing support, routing and troubleshooting of existing interconnects.
• Monitoring, managing and support upgrades of the Mobile Core Physical, Virtualised and Containerised infrastructure.
• Continuous review of the architecture and any preventative maintenance.
• Participate in network expansion, capacity planning, and software upgrades.
• Contribute to RFP evaluations and vendor discussions for core and IMS-related projects.
• Work with the Security Architect to (a) review assets, identify weaknesses and ensure appropriate security is maintained; (b) to ensure the Security strategy is implemented including the integration from within your domain with the security technology and tools.
• Investigate security alerts and provide incident response within your domain.

• Strong understanding of 2G, 4G and 5G mobile networking and associated core.  
• Experience with mobile core nodes (MME, SGW, PGW, PCRF, HSS) and IMS components (SBC, , S-CSCF, I-CSCF BGCF etc).
• Strong understanding of protocols utilised in a mobile network including but not limited to SIP, Diameter and SS7.
• Knowledge of IP networks, routers, switches, dynamic routing protocols and an appreciation of system security.
• An understanding and skills to configure and administer a telecoms virtualised and containerised environment.
• Good communication skills both written and verbal.
• Willingness to work and communicate with both internal cross departmental teams as well as external customers.
• Flexible approach to work and participation in a callout rota.
• Desire to learn new technologies through both formal and self-learning and ability to adapt to an ever-changing technical environment.
• Diligence and attention to detail are key skills along with ability to multi-task and prioritize work appropriately.
• Calm and controlled under pressure.

Your specialist: Debbie Amankwa

Quote job ref: 16366

Hi, I'm Debbie and I look forward to receiving your submission for this fantastic opportunity with this business.

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