Telecom Security Engineer (2G/3G/4G/5G networks, RAN, EPC/5G Core, IMS/VoLTE)

Telecom Security Engineer

Location : Noida

Employement Type : Contract

Salary : Pay will be on hourly basis

Job Summary

We are looking for a Telecom Security Engineer with strong hands-on knowledge of 2G/3G/4G/5G networks, RAN, EPC/5G Core, IMS/VoLTE, telecom signaling protocols, and telecom security.

The candidate should understand telecom network elements, their security requirements, and logging capabilities. The role will work closely with Telecom Network/OEM, Cybersecurity, SOC, and SIEM teams to enable centralized security monitoring of telecom infrastructure.

Role positioning: SIEM knowledge is highly preferred; however, the primary requirement is strong Telecom domain expertise with an understanding of security monitoring and log integration.

Key Responsibilities

· Understand end-to-end 2G/3G/4G/5G architecture, including RAN, EPC, 5G Core, IMS/VoLTE, and OSS/BSS.

· Work with telecom network elements including HLR, HSS, MSC, MME, SGW, PGW, AMF, SMF, UPF, PCRF/PCF, SBC, and IMS components.

· Apply knowledge of SS7, Diameter, GTP, SIP, and 5G Core/SBA protocols.

· Assess telecom security threats and vulnerabilities across Core, RAN, IMS, signaling, roaming, and interconnect environments.

· Identify security-relevant logs and events generated by telecom network elements and applications.

· Coordinate with OEM/vendor teams to enable appropriate security logging on telecom devices.

· Support onboarding of telecom devices and applications into the SIEM platform.

· Coordinate connectivity, routing, firewall, and log-forwarding prerequisites with relevant teams.

· Work with SIEM engineers on log validation, parsing, normalization, field mapping, and integration troubleshooting.

· Identify security-logging gaps and support remediation of missing, delayed, or incorrectly parsed events.

· Assist SOC/SIEM teams in defining telecom-specific security monitoring and detection use cases.

· Maintain telecom device inventory, logging requirements, integration details, and supporting technical documentation.

Mandatory Skills

· Strong understanding of 4G LTE and 5G architecture, including EPC and 5G Core.

· Knowledge of RAN architecture, IMS/VoLTE, and major Telecom Core network elements.

· Strong working knowledge of SS7, Diameter, GTP, and SIP.

· Understanding of telecom signaling security, network security, and security events.

· Hands-on telecom device and network troubleshooting experience.

· Knowledge of IP networking, TCP/IP, routing, DNS, and firewall fundamentals.

· Understanding of telecom network-element logs and device logging capabilities.

· Ability to collaborate across Telecom Network, OEM, Cybersecurity, SOC, and SIEM teams.

SIEM Knowledge - Highly Preferred

The candidate does not need to be a dedicated SIEM administrator, but should preferably understand:

· SIEM architecture and security-monitoring concepts.

· Telecom log-source onboarding and log collection/forwarding.

· Syslog and API-based integration concepts.

· Log parsing, normalization, validation, and security-event field mapping.

· Log-integration troubleshooting and data-quality validation.

· SIEM correlation, detection-use-case requirements, and SOC monitoring needs.

· Working knowledge of Splunk, Microsoft Sentinel, QRadar, FortiSIEM, or an equivalent SIEM platform.

Preferred OEM Experience

Ericsson | Nokia | Huawei | Cisco | Mavenir | Oracle

Preferred Qualifications

· Bachelor's degree in Telecommunications, Electronics, Computer Science, IT, Cybersecurity, or an equivalent discipline.

· 5-10 years of relevant Telecom or Telecom Security experience.

· Experience in Telecom Core, Network Security, Telecom SOC, or security-monitoring environments.

· Telecom 4G/5G, networking, cybersecurity, or SIEM-related certifications are advantageous.