Cyber Network Security Specialist

Job Summary

We are seeking a highly skilled Cyber Network Security Specialist with strong expertise in both mobile networks and IP networks. The successful candidate will be responsible for safeguarding the organization's network infrastructure, ensuring the integrity, confidentiality, and availability of data across mobile and IP-based systems. This role involves implementing security controls, monitoring network traffic, responding to incidents, and supporting the secure operation of next-generation telecommunications environments including LTE, 5G, and IMS.

Roles & Responsibilities

Network & Mobile Security Operations

• Protect IP and mobile network infrastructure from cyber threats through advanced security monitoring, prevention, and response mechanisms.

• Conduct regular network vulnerability assessments and implement timely remediation strategies.

• Monitor network traffic for anomalies, identify threats, and lead incident response for both mobile and IP network breaches.

• Review and approve communication matrices, firewall rule changes, and configuration updates.

• Collaborate with Technology teams to integrate, maintain, and optimize security measures.

• Prepare management reports covering security incidents, vulnerabilities, firewall posture, and risk trends.

• Deliver training and awareness sessions on mobile and network security best practices.

• Stay updated with cybersecurity trends, emerging threats, and evolving standards and recommend enhancements.

Core Network & IP Security Responsibilities

• Implement and maintain security measures across essential IP protocols such as IPv4/IPv6, ICMP, ARP, DNS, DHCP.

• Manage routing and network control protocols including OSPF, BGP, EIGRP/RIP, VRRP/HSRP/GLBP, MPLS.

• Support transport and session protocols (TCP, UDP, TLS/SSL, DTLS) and network monitoring via SNMP, Syslog, NetFlow/IPFIX, NTP.

• Oversee secure remote access and administration using SSH, RDP, VNC, HTTP/HTTPS.

• Manage email and directory service security (SMTP, POP, IMAP, LDAP, Kerberos, NTLM, SAML).

• Secure file transfer operations across FTPS/SFTP, TFTP, SMB, NFS.

• Administer VPN and tunneling technologies including IPsec, GRE/L2TP/PPTP, SSL/TLS, OpenVPN, WireGuard.

• Implement authentication/authorization frameworks (RADIUS, TACACS+, OAuth2, OpenID Connect).

• Support VoIP/real-time services security (SIP, RTP, MGCP).

Mobile Network / Telephony Security

• Secure core components across 2G/3G/4G/5G including MSC, SGSN, GGSN, MME, HSS, PCRF, AMF, SMF, UPF, eNodeB/gNodeB.

• Address signaling security across SS7, Diameter, SIP vulnerabilities; ensure effective use of signaling firewalls.

• Manage SIM/eSIM security including provisioning, IMSI/IMEI management, USIM protections, EAP-AKA, and lifecycle controls.

• Ensure 5G SA/NSA security compliance including SBA, SEPP, network slicing security, virtualization risks.

• Strengthen RAN security including backhaul encryption and physical site protection.

• Maintain strong VoLTE/VoWi-Fi/IMS security posture including SIP over TLS, SRTP, SBC hardening, and lawful interception controls.

General Responsibilities

• Develop and enforce security policies for IP and mobile networks.

• Assess risks associated with new technologies, services, and third-party vendors.

• Support the Line Manager with assigned tasks as required.

  Qualifications & Experience

• Minimum 3–5 years of experience in Network Security, preferably covering both IP and mobile networks.

• Bachelor's degree in Computer Science, Information Technology, Cyber Security, or a related field.

• Professional certifications preferred: CISSP, CCNP Security, PCNSE, NSE, CEH, cloud networking certifications (AWS/Azure/GCP), or equivalents.

• Telecom-specific certifications or training such as GSMA Security, ETSI/5G workshops, Huawei HCIP, Nokia, or Ericsson credentials are an asset.

• Strong proficiency with firewalls, IDS/IPS, SIEM, encryption technologies, and secure coding practices.

• Strong analytical and problem-solving skills with proven ability to detect anomalies and respond effectively to incidents.

• Excellent written and verbal communication skills, with the ability to convey technical details to non-technical stakeholders (French and English preferred).

• Knowledge of legal, regulatory, and privacy frameworks including PII protection, PCI-DSS, and GDPR.

• Ability to work independently and as part of a team in a high-pressure, fast-paced environment.

• Willingness to work occasional after-hours shifts for system maintenance or incident response.

Talent Leaders Inc., Calgary, Canada 

Canada | Qatar | UAE | KSA | India 

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