Network Security Engineer Job Vacancy in Lagos, Nigeria – Telecommunications

Job Description

Position:Network Security Engineer

Company:MTN Nigeria

Location:Lagos, Nigeria

Experience:5-7 years of experience in network security engineering

Education:Bachelor’s degree in Computer Science, Information Technology, or related field

Employment Type:Full-time

Industry:Telecommunications

Department:Network Security

Salary:₦2,500,000 – ₦4,000,000 per annum

Vacancies:1

Company Overview

MTN Nigeria is a leading telecommunications provider delivering innovative mobile and data services to millions of customers across the nation. With a strong commitment to digital inclusion, the company invests heavily in network infrastructure, cutting‑edge technology, and community development programs. As a key player in the African telecom landscape, MTN Nigeria offers a dynamic work environment where talent thrives, and career growth is encouraged. The organization’s vision to connect every Nigerian aligns with national development goals, making it an attractive destination for professionals seeking meaningful impact. This role contributes directly to the security and reliability of the nation’s most extensive mobile network, reinforcing MTN’s reputation for excellence in service delivery.

MTN Nigeria’s culture emphasizes collaboration, continuous learning, and a customer‑centric mindset. Employees benefit from comprehensive benefits, robust training programs, and opportunities to work on high‑visibility projects that shape the future of telecommunications in Nigeria. As part of the broader MTN Group, the company adheres to global standards of governance, sustainability, and corporate responsibility, ensuring that every team member participates in a responsible and forward‑thinking enterprise.

Job Overview

The Network Security Engineer will play a pivotal role in safeguarding MTN Nigeria’s core network infrastructure against evolving cyber threats. Reporting to the Head of Network Security, the incumbent will design, implement, and manage security solutions that protect data, voice, and broadband services. This position offers an exciting opportunity to work with state‑of‑the‑art security tools, collaborate with cross‑functional teams, and influence security policies that affect millions of subscribers. The role is central to MTN’s commitment to secure, reliable, and resilient telecommunications services, making it a cornerstone of the company’s operational excellence.

In addition to technical responsibilities, the engineer will engage with internal stakeholders to raise security awareness, conduct risk assessments, and ensure compliance with national regulations such as the Nigerian Data Protection Regulation (NDPR). The successful candidate will be instrumental in driving a proactive security posture, contributing to MTN’s reputation as a trusted provider in the market. This position is ideal for professionals seeking to advance their careers in a fast‑paced, technology‑driven environment while making a tangible impact on Nigeria’s digital ecosystem.

For more information about MTN Nigeria and its commitment to innovation, visit the official portal at https://nigeriajobsearch.com/. This link provides additional insights into the company’s values, recent projects, and the broader landscape of Nigeria Jobs, reinforcing why this opportunity stands out among Jobs in Nigeria.

Key Responsibilities

• Design, configure, and maintain firewalls, intrusion detection/prevention systems, and VPN solutions across the core network.
• Conduct regular vulnerability assessments, penetration testing, and security audits to identify and remediate risks.
• Develop and enforce security policies, standards, and procedures aligned with industry best practices and regulatory requirements.
• Monitor network traffic using SIEM tools, analyze alerts, and respond to security incidents in real time.
• Collaborate with network engineering, operations, and IT teams to integrate security controls into new deployments and upgrades.
• Provide technical guidance and mentorship to junior security staff and participate in on‑call rotation for incident response.
• Prepare detailed incident reports, root cause analyses, and recommendations for continuous improvement.
• Stay current with emerging threats, vulnerabilities, and security technologies to ensure the network remains resilient.

Required Skills

• Strong knowledge of network protocols (TCP/IP, BGP, MPLS) and security architectures.
• Hands‑on experience with firewalls (e.g., Palo Alto, Fortinet), IDS/IPS, and VPN technologies.
• Proficiency in SIEM platforms such as Splunk, QRadar, or ArcSight.
• Familiarity with scripting languages (Python, Bash) for automation of security tasks.
• Understanding of regulatory frameworks like NDPR, ISO 27001, and NIST.
• Excellent analytical, problem‑solving, and communication skills.
• Ability to work under pressure and manage multiple security incidents simultaneously.

Education

A Bachelor’s degree in Computer Science, Information Technology, Cybersecurity, or a related discipline is required. Professional certifications such as CISSP, CISM, CCNP Security, or GICSP are highly desirable and will be considered an advantage during the selection process.

Experience

Applicants must possess a minimum of five to seven years of hands‑on experience in network security engineering within a large‑scale telecommunications environment. Demonstrated experience in designing and managing security solutions for carrier‑grade networks is essential.

Salary

The compensation package ranges from ₦2,500,000 to ₦4,000,000 per annum, commensurate with experience and qualifications. The package includes performance‑based bonuses, health insurance, and a retirement savings plan.

Benefits

• Comprehensive health and dental coverage.
• Annual performance bonus.
• Retirement savings scheme (Pension).
• Paid parental and sick leave.
• Employee assistance program.
• Discounted mobile and data plans.

Training

• Access to MTN’s internal learning platform for continuous skill development.
• Sponsored certifications in cybersecurity and network technologies.
• Mentorship programs with senior security architects.
• Participation in industry conferences and workshops.

Working Environment

MTN Nigeria offers a modern office environment in Lagos equipped with collaborative workspaces, high‑speed internet, and ergonomic facilities. The role may require occasional travel to regional data centers and field sites for on‑site assessments and implementation activities.

Application Process

Interested candidates should submit their updated CV and a cover letter outlining relevant experience through the MTN Careers portal. Applications will be reviewed on a rolling basis, and shortlisted candidates will be contacted for an initial interview followed by technical assessments.

Equal Opportunity Statement

MTN Nigeria is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees, regardless of gender, race, religion, or disability. All qualified applicants will receive consideration for employment without regard to any protected characteristic.