Principal/Senior Engineer, Cybersecurity

M1 LTD is at the forefront of the telecommunications revolution, building and securing the networks that connect millions. We are seeking a dedicated Cyber Security Specialist to safeguard our 4G and 5G infrastructure. You will be responsible for identifying vulnerabilities, designing robust defense mechanisms, and ensuring the integrity of our core network and edge computing environments.

If you thrive on protecting high-availability systems and understand the unique threat landscape of modern telecoms, we want to hear from you.

Job Responsibilities:

• Perform daily monitoring of security incidents and incident response activities
• Assess security incidents and determine appropriate actions.
• Network Security Architecture: Design and implement security controls for 4G (LTE) and 5G Standalone (SA) and Non-Standalone (NSA) environments.
• Threat Management: Monitor, detect, and respond to security incidents targeting the Radio Access Network (RAN) and Core Network.
• Vulnerability Assessment: Conduct regular penetration testing and vulnerability scans on telecom infrastructure.
• Compliance & Standards: Ensure adherence to 3GPP security standards and industry regulations (NIS2, GDPR, etc.).
• 5G Specific Security: Secure network slicing, Multi-access Edge Computing (MEC), and Service Based Architecture (SBA) interfaces.
• Collaboration: Work closely with network engineers and SOC teams to integrate security into the DevOps/NetOps lifecycle.
• Deploy, configurate, maintain and upgrade AD, 2FA, TACACS, jump-hosts etc owned by the Security Operations team.
• Conduct regular vulnerability scans and coordinate with system owners for timely rectifications
• Review firewall rules and security configurations
• Evaluate and approve security-related requests (e.g., IAM and user access requests).
• Ensure that security baselines and hardening guidelines are applied across on-premises, hybrid, and cloud environments to meet corporate and regulatory standard.
• Conduct readiness preparations for cybersecurity audits such as CyberTrustMark (CTM) and Telecoms CyberSecurity (TCS) code of practice in a telco environment.
• Conduct proactive threat hunting to identify potential threats.
• Assist in maintaining M1's security documentation, including policies, standards, baselines, guidelines, and procedures.
• Assist the department in achieving business objectives while complying with regulatory requirements and M1 cybersecurity policies.
• Keep up to date with industry security best practices and align them with business objectives.

Job Requirements:

• Bachelor's degree in computer science, IT/Engineering or equivalent field
• Experience: 3+ years in cybersecurity, with specific exposure to telecommunications networks.
• Certifications: CISSP, CEH, or vendor-specific certifications (Nokia, Ericsson, Huawei) are a plus.
• Technical Knowledge: Strong understanding of 4G/5G protocols (GTP, SIP, Diameter, HTTP/2) and IP networking.
• Security Frameworks: Familiarity with 3GPP security specifications and O-RAN security guidelines.
• Tools: Experience with SIEM, IDS/IPS, and firewall management in a telecom environment.
• Experience with risk management, vulnerability management, threat analysis, security auditing, security monitoring, incident response and other information security practices will be an advantage.
• Experience with PAM, NDR and EDR will be an advantage.
• Independent and work well in a team environment
• Good analytical, problem-solving and critical thinking skills
• Enjoy working with multiple parties to achieve the desired cybersecurity outcomes.
• Good oral and written communication skills
• Able to perform standby/on-call duties.