Network Security Engineer in an Internet Service Provider (ISP)

Lorache Group – Our client is an Internet Service Provider (ISP) with large base of customers across different locations in Nigeria.

They are recruiting to fill the position below:

Job Title: Network Security Engineer

Location: Lagos

Roles and Responsibilities

• Maintain packet switching core nodes (SGSN, GGSN, MME, SGW/PGW, CG, and Switch) and resolve UE browsing issues.
• Handling technical queries, technical presentation and root cause analysis.
• Back Office support, Alarm monitoring, problem identification and resolution.
• Designed EPC packet switched core network topology and planned IP address/VLANs for new build LTE network.
• Monitoring and analysis of PS core Performance KPIs for any complex issues in the network.
• Analysis of traffic measurements, success rates and other PS KPI performance
• Integration of BSC, RNC, eNodeB, HSS, OCS, PCRF with PS core network nodes.
• Configured and integrated LTE network with already existing 2G and 3G Network.
• Performed software upgrade, license loading and rectifications on Huawei SGSN, GGSN and CG to enable interoperability between the GPRS/UMTS and LTE nodes.
• Strong Knowledge of MME, SGSN, SGW, PGW, GGSN, PCRF, VoLTE, CG, DNS, URL Server, OCS
• PS projects implementations and support for operator networks.
• STP and DRA Swap project.
• Designed the EPC packet switched core network topology and planned IP address/VLANs for new build LTE network.
• Commissioned and configured SGW/PGW, MME and CG and achieved end to end first call.
• Strong Knowledge on Protocols: BSSAP, RANAP, GTP, MAP, SCTP, Diameter, SGSAP, S1AP, RADIUS
• Good Knowledge on Interfaces: Gb, Ga, Gn/Gp, Gr, Gf, Gi, Gy, Gx, SGs, S1, S6a, S10/S11, S5/S8, GGSN, SGW, PGW , SGSN, MME, CG, DNS, Switch, Firewall, SPS, HLR/HSS, PCRF
• KPIs Analysis: Mobility, Accessibility, Retain ability, Availability, etc
• Analysis and Solution for E2E problems like throughput, accessibility, and mobility.
• Abilities to evaluate the network performance.
• Good knowledge on CS nodes configuration and parameters (MSC MGW HLR HSS etc), basic and optional features to help to improve the network performance and user experience.
• Abilities to Planned and Designed HLD/LLD for entire EPC Core.
• Abilities to Implement Layer7 DPI, Content Based Charging, service based traffic shaping, flow based charging and Bandwidth control.
• Configuration of Cisco routers and switches.
• Huawei Routers and Switches.
• Strong Knowledge of routing protocols such as static, ospf, isis, bgp, mpls,l2vpn.
• Hands on Huawei PS Core equipment’s and Cisco Routers.
• Availability to system 24X7 for any issue resolution and willing to learn further.

Requirements

• Graduate in Computer Science / Information Technology / Networking / telecom.
• From 4 – 5 Years of experience
• Certification required: CCNP, CCSP, CCDA
• Working knowledge on Cisco & Huawei network switches and routers.
• Detailed technical knowledge of L2 & L3 routing, switching protocols.
• Available to work in 24*7 shift time, on-call support.

Deadline: 22nd November, 2020.

How to Apply
Interested and qualified candidates should send their CV to: lorachevacancy@gmail.com using the Job Title as the subject of the mail.