CS Core Network Engineer – L2 | Tangent International | Unspecified

Tangent International; Gajar; On-site; PKR 23,578,000 - 33,287,000; Full time

Job summary

Tangent International is urgently seeking an experienced CS Core Network Engineer – L2 to support mission-critical circuit-switched core network operations, maintenance, and technical delivery activities for large mobile carrier networks.

With 5–8 years of hands-on telecom core network experience, you will troubleshoot MSC/MSS, MGW, HLR/HSS, run signaling analysis across SS7/SIGTRAN/MAP/ISUP/SIP, and perform RCA, upgrades, and preventive health audits while following change management processes.

Qualifications

• Bachelor’s degree in Telecommunications, Electronics Engineering, Computer Science, or a related engineering discipline.
• Between 5 to 8 years of dedicated, relevant professional engineering experience in telecommunications Core Network operations.
• Strong hands-on operational and maintenance experience across CS Core Network architecture and voice switching systems.
• Demonstrated technical proficiency with MSC/MSS, MGW, HLR/HSS platforms, circuit-switched signaling, and mobile voice services.
• In-depth working knowledge of core telecommunications signaling protocols including SS7, SIGTRAN, MAP, ISUP, and SIP."
• Proven capability to analyze signaling traces, diagnose protocol failures, and perform structured technical fault resolution.

Responsibilities

• Perform day-to-day operations, routine administration, preventive maintenance, and Tier-2 troubleshooting across CS Core Network elements.
• Investigate, isolate, and resolve complex technical faults related to MSC/MSS, MGW, HLR/HSS, and interconnected core systems.
• Execute network configuration, hardware integration, commissioning, software upgrades, and voice service migration activities.
• Monitor and analyze core network alarms, traffic statistics, voice KPIs, and service abnormalities to deliver effective corrective actions.
• Conduct granular fault diagnosis, signaling trace analysis, and end-to-end RCA on network incidents.
• Perform routine system health audits, database backups, capacity checks, and parameter fine-tuning to ensure optimal network performance.
• Coordinate actively with customer operational teams, multi-vendor support engineers, and project leads during major outage handling and deliveries.
• Enforce formal change management procedures and author rigorous technical reports, troubleshooting documentation, and MOP guidelines.

Skills

Core Network operations

Signaling protocol analysis

Troubleshooting and RCA

MSC/MSS/MGW/HLR/HSS administration

English communication

Education

Bachelor’s degree in Telecommunications/Electronics/related field

Tools

Huawei Core Network (M2000/U2020)

IMS/VoLTE knowledge

Linux/Unix scripting

Job description

Position Summary:

Tangent International is urgently seeking an experienced, analytical CS Core Network Engineer – L2 to support mission‑critical Circuit Switched Core Network operations, maintenance, and technical delivery activities. In this vital Tier‑2 engineering role, you will take operational ownership of sustaining high‑availability mobile voice services, signaling networks, and core subscriber databases. Leveraging 5 to 8 years of specialized hands‑on experience in telecommunications core network environments—with strong preference for Huawei Core Network platforms—you will perform advanced fault isolation, network health checks, software upgrades, and performance optimization. This position offers an outstanding career platform for a dedicated telecommunications professional to ensure seamless connectivity and subscriber quality of service across large‑scale mobile carrier networks.

Detailed Job Description:

As a CS Core Network Engineer – L2 at Tangent International, you will provide comprehensive operational support, technical delivery, and complex troubleshooting across the entire circuit‑switched telecommunications domain. Collaborating within a multicultural technical environment, you will partner closely with tier‑1 network operations centers, tier‑3 principal architects, project managers, and telecommunications operator clients to drive incident resolution, service migration, and core infrastructure modernization.

Your core technical mandate spans managing and troubleshooting critical CS Core Network elements including Mobile Switching Centers (MSC / MSS), Media Gateways (MGW), and Home Location Registers / Home Subscriber Servers (HLR/HSS). You will conduct deep signaling analysis across industry‑standard protocols including SS7, SIGTRAN (M3UA, SCTP), MAP, ISUP, and SIP, resolving call drop issues, routing loops, and authentication failures. In addition to reactive emergency fault management and root cause analysis (RCA), you will execute scheduled configuration changes, commissioning, software patch upgrades, and preventive health audits. Adhering strictly to change management governance, you will ensure all maintenance interventions are delivered safely without customer disruption while generating comprehensive troubleshooting runbooks and implementation documentation.

Key Responsibilities:

• Perform day‑to‑day operations, routine administration, preventive maintenance, and Tier‑2 troubleshooting across CS Core Network elements.
• Investigate, isolate, and resolve complex technical faults related to MSC/MSS, MGW, HLR/HSS, and interconnected core systems.
• Execute network configuration, hardware integration, commissioning, software upgrades, and voice service migration activities.
• Monitor and analyze core network alarms, traffic statistics, voice KPIs, and service abnormalities to deliver effective corrective actions.
• Conduct granular fault diagnosis, signaling trace analysis, and end‑to‑end root cause analysis (RCA) on network incidents.
• Perform routine system health audits, database backups, capacity checks, and parameter fine‑tuning to ensure optimal network performance.
• Coordinate actively with customer operational teams, multi‑vendor support engineers, and project leads during major outage handling and deliveries.
• Enforce formal change management procedures and author rigorous technical reports, troubleshooting documentation, and Method of Procedure (MOP) guidelines.

Required Qualifications & Skills:

• Bachelor’s degree in Telecommunications, Electronics Engineering, Computer Science, or a related engineering discipline.
• Between 5 to 8 years of dedicated, relevant professional engineering experience in telecommunications Core Network operations.
• Strong hands‑on operational and maintenance experience across CS Core Network architecture and voice switching systems.
• Demonstrated technical proficiency with MSC/MSS, MGW, HLR/HSS platforms, circuit‑switched signaling, and mobile voice services.
• In‑depth working knowledge of core telecommunications signaling protocols including SS7, SIGTRAN, MAP, ISUP, and SIP.
• Proven capability to analyze signaling traces, diagnose protocol failures, and perform structured technical fault resolution.
• Demonstrated ability to work independently and effectively within a multicultural, multi‑vendor telecommunications engineering environment.
• Excellent verbal and written English communication skills for compiling technical reports and liaising with enterprise clients.

Nice‑to‑Have Skills:

• Extensive hands‑on operational and delivery experience on Huawei Core Network equipment and Huawei M2000/U2020 NMS platforms (highly preferred).
• Familiarity with IMS (IP Multimedia Subsystem) architectures, VoLTE (Voice over LTE), and CSFB (Circuit Switched Fallback) mechanisms.
• Working knowledge of IP networking fundamentals, routing protocols, and Ethernet switching in telecom environments.
• Professional vendor certifications in Huawei Core Network technologies (e.g., HCIP or HCIE Core Network).
• Experience with Linux/Unix operating systems and shell scripting for automated log collection and health check verifications.

Application Information:

• Recruitment Agency: Tangent International
• Position Title: CS Core Network Engineer – L2
• Function / Domain: Core Network / Circuit Switched Domain
• Work Location: Unspecified
• Employment Type: Full Time
• Experience Required: 5–8 years of relevant experience in telecom Core Network
• Vendor Preference: Experience with Huawei Core Network equipment is highly preferred
• Application Email: [e-mail]

Recruitment Pro Tip:

To maximize your profile visibility for Tangent International’s hiring team, ensure your CV explicitly details your hands‑on operations and maintenance experience with Huawei MSC/MSS and MGW hardware, highlighting specific signaling trace analysis involving SS7, SIGTRAN, MAP, and SIP protocols. Emphasize your track record in conducting successful commissioning, upgrades, and complex root cause analyses (RCA), and submit your updated CV directly to [e-mail].