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Friday, 20 November 2020

Job Vacancy for Network Security Engineer at an Internet Service Provider (ISP) - Lorache Group

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.
  • 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.
  • 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
  • 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.

Application Closing Date
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.

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