Job description
Grade: L2/L3 Location: Islamabad Last date to apply: 30 April 2026 What is Telco Network Security Expert?
Telco Network Security Expert is responsible to lead the design, implementation, and continuous improvement of security controls across Jazz’s telecom core, signaling infrastructure, and cloud-native NFVI/5G environments.
This role is critical in protecting the organization against evolving threats targeting SS7/Diameter signaling, 4G EPC, and 5G Service-Based Architecture (SBA), while ensuring secure adoption of virtualization and cloud-native network functions.
The role reports directly to the Manager Architecture & Cloud Security with an extended team of 15 team members.
What does Telco Network Security Expert do?
1. Secure SS7, Diameter, and 5G SBA (Service-Based Architecture) signaling networks 2.
Implement signaling firewalls and anti-fraud controls (SMS, voice, roaming attacks) 3.
Monitor and mitigate attacks such as: a.
Location tracking (ATI abuse) b.
SMS interception c.
Call redirection / spoofing 4.
Ensure secure interconnects with roaming partners and third parties 5.
Design and enforce security for: a.
EPC (MME, SGW, PGW, HSS) b.
5G Core (AMF, SMF, UPF, AUSF, UDM, NRF) 6.
Implement security controls aligned with 3GPP standards 7.
Secure APIs in 5G SBA architecture (OAuth2, TLS, API gateways) 8.
Perform security hardening of network functions (VNFs/CNFs) 9.
Secure NFV infrastructure (OpenStack, Kubernetes, containers) 10.
Implement micro-segmentation and zero-trust models 11.
Ensure workload protection for CNFs and VNFs 12.
Integrate telco workloads with cloud security controls (public/private cloud) 13.
Monitor telecom-specific threats using SIEM/SOC platforms 14.
Integrate telecom probes and logs (signaling, GTP, Diameter) into SOC 15.
Lead incident response for telecom network attacks 16.
Conduct threat hunting focused on telecom fraud and signaling abuse 17.
Define end-to-end telecom security architecture 18.
Evaluate and deploy telecom security tools: a.
Signaling firewalls (SS7/Diameter/5G) b.
DDoS protection systems c.
IDS/IPS for telco protocols 19.
Provide technical leadership for secure rollout of new services (VoLTE, IoT, 5G slicing) JazzWorld is an equal opportunity employer.
We celebrate, support, and thrive on diversity and are committed to creating an inclusive environment for all employees.
Why join JazzWorld?
As a certified Top Employer, JazzWorld reflects workplace standards benchmarked against leading global organizations, demonstrating our commitment to creating an environment where people can thrive and perform at their best.
Our teams are driven by the belief that every JazzWorld employee should be inspired to live better every day, enabled by forward-looking leadership, an open culture, meaningful work, and continuous opportunities to learn and grow.
Our core values - Customer Obsession, Truthful, Innovation, Collaboration, and Entrepreneurial shape how we think, decide, and lead.
They encourage us to challenge convention, act with accountability, work as one team, and create solutions that truly matter for our customers and communities.
As Pakistan's largest digital operator, JazzWorld serves over 100 million through connectivity, digital services, financial inclusion, entertainment, and insurance.
Joining us means being part of transformation at a national scale; expanding access, unlocking opportunity, and building a more connected digital future.
At JazzWorld, everything we do is rooted in one shared ambition.
This purpose defines how we work, the progress we enable, and the difference we strive to make every day a Better Life For All.
What are we looking for and what does it require to be Telco Network Security Expert?
BS/MS in Telecom/Information Technology Practical experience of telecom network · 5+ Years of experience in telecom security or core network operations · Functional o Ability to organize, plan and document tasks; o Ability to manage internal & external stakeholders; o Possess good logical and analytical skills to help in analysis of Cyber Security risks · Technical o Strong understanding of: § SS7, SIGTRAN, Diameter, GTP, SIP § LTE EPC and 5G Core architecture o Experience with roaming and interconnect security o Hands-on with: § Network security (firewalls, IDS/IPS, DPI) § SIEM platforms (Splunk, ELK, QRadar, etc.
) § Threat intelligence and incident response o Experience with: § Kubernetes, Docker § OpenStack / NFV environments § API security and service mesh o Signaling Firewalls (e.
g., Mobileum, Enea, Ericsson) o Fraud Management Systems o DDoS mitigation platforms o Packet capture and analysis tools
This job post has been translated by AI and may contain minor differences or errors.
