Senior Engineer, Circuit Switch Core

June 6, 2022

Job Description

  • Lagos

9mobile Nigeria

9mobile is a Nigerian private limited liability company. EMTS acquired a Unified Access Service License from the Nigerian Communications Commission in 2007. The License enables EMTS provide Fixed Telephony (wired or wireless), Digital Mobile Services, International Gateway Services and National/Regional Long Distance Services in addition to spectrum assignments in the 900 and 1800 MHz bands.
We are recruiting to fill the position below:
Job Title: Senior Engineer, Circuit Switch Core
Job ID: IRC4572
Location: Lagos
Job Summary

Support all CS core network operation and maintenance activities to ensure required availability.
Coordinate all CS core related troubleshooting, fault analysis and performance improvement measures – preventive maintenance.
Coordinate all acceptance testing for all CS core node integrations.
Oversee all CS core network audit and performance improvement/maintenance activities on the network.
Ensure preventive measures are implemented to avert network downtime and service disruption on CS core network elements and links.
Ensure all vendor activities are in line with all agreed SLAs & KPIs.

Principal Functions

Maintain maximum availability and reliability of the entire CS core network
Improve mean time to repair (MTTR) on all CS core network related faults and complaints
Promptly implement all interconnects and service requests with partners
Implement software upgrades, patch installations and expansion activities on all CS core network nodes
Support NOC/Field operations teams in all CS core related escalations
Review all new CS core related features and its impact on existing network
Ensure regular network performance improvement via key KPI's such as LUSR, PSR, AUTHSR, CSR
Regularly review B number analysis table across all CS core systems.
Enforce strict conduct of Quarterly audit of all CS core node configurations and ensure implementation of all relevant recommendations
Ensure all change requests are implemented timely and accurately by Vendor
Carry out quarterly backup and restore tests on all CS core network elements.
Continuously review all CS core operations frameworks, make recommendations for improvement and implement approved initiatives to ensure enhanced network performance.
Recommend and implement strict measures to control fraudulent high usage activities of illegal inbound/outbound roamers on the network.
Integration, daily operations and maintenance on MSC/ HSS/ MGW/ STP/ SPS/ SBC/ ITSC/ U2020/other CS core nodes.
Ensure proper documentation of operations on all CS core network systems
Maintain snag/fault lists and follow up with vendor on clearance.
Carry out all integrations and implementations on CS core nodes.
Analyse performance reports and proactively resolve core network challenges.
Supervise the implementation of software upgrades; file system upgrades; and hardware replacement on core network.
Specify and review critical CS core performance measurement counters.
Lead the troubleshooting of core network operations challenges and create solutions.
Produce policies and procedures for managing and controlling managed services team.
Perform periodic reconciliation of HLR profiles and templates in line with business requirements.
Audit announcements and tone files between the IN platform and core network nodes.
Perform other tasks as may be assigned by the Manager Core & Datacom.

Educational Requirements

First Degree or equivalent in Electrical / Electronic Engineering, Computer Engineering and/ or any other relevant discipline.
Between three (3) to five (5) year experience in Telecoms.


Excellent communication and interpersonal skills.
Excellent problem-solving skills.
Good time management skills.
Good reporting skills.


Passion for Excellence
Empowering people
Growing people
Customer Focus

Application Closing Date
Not Specified.
How to Apply
Interested and qualified candidates should:
Click here to apply online

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