Network Security Engineer

Interfront SOC; Pretoria; Hybrid; ZAR 60 000 - 80 000; Full time

Job summary

A security consulting firm in Pretoria is seeking a Senior Network Security Engineer to design and maintain robust security infrastructure. Candidates must have over 7 years of experience, strong expertise in incident response, threat mitigation, and relevant certifications. This hybrid contract position offers competitive compensation aligned with market rates and requires close collaboration with cross-functional teams.

Qualifications

• Minimum of 7 years experience in network security engineering.
• Proven experience managing enterprise-grade security infrastructure.
• Experience with ISO/IEC 27002 compliance.

Responsibilities

• Design, implement, and maintain network security infrastructure.
• Manage security platforms and monitor network traffic for anomalies.
• Conduct forensic analysis and support incident response.

Skills

Network security

Protocols

Information Security

Intrusion Detection

SIEM

Education

Bachelor's degree in information security or Computer Science

CCNP Security, CISSP or equivalent certification

Tools

Web Application Firewalls (WAF)

Next-Generation Firewalls (NGFW)

Cisco ISE

Job description

Description

Design implement and maintain robust network security infrastructure to protect Customers digital environment.

Manage and optimize security platforms including firewalls, intrusion prevention systems (IPS), DDoS mitigation tools, VPNs, secure email gateways, and Cisco Identity Services Engine (ISE).

Monitor network traffic to detect anomalies, investigate potential threats, and respond promptly to security incidents.

Conduct forensic analysis and support incident response to ensure timely containment and resolution of security events.

Ensure compliance with cybersecurity policies, ISO/IEC 27002 standards, and relevant regulatory requirements.

Oversee the lifecycle management of digital certificates and the secure provisioning of third‑party network connections.

Manage and resolve network security requests and incidents through the Remedy system within agreed service levels.

Maintain accurate technical documentation, configurations and incident logs to support audits and risk reporting.

Collaborate with internal teams to identify vulnerabilities, recommend security enhancements and strengthen overall network defense.

Key Responsibilities

• Design, implement and maintain robust network security infrastructure to protect customers' digital environment.
• Manage and optimize security platforms (firewalls, IPS, DDoS mitigation tools, VPNs, secure email gateways, and Cisco ISE).
• Monitor network traffic to detect anomalies and respond to security incidents.
• Conduct forensic analysis and support incident response.
• Ensure compliance with ISO/IEC 27002 and other regulatory requirements.
• Oversee digital certificate lifecycle and secure provisioning of third‑party connections.
• Resolve network security requests and incidents via Remedy within SLAs.
• Maintain documentation, configurations and incident logs for audits.
• Collaborate to identify vulnerabilities and recommend improvements.

Closing date

12th of November 2025

Position type

24 months contract

Available positions

2

Hybrid position; successful candidates must be based in the Gauteng area.

These positions are open to persons with disabilities.

Qualifications and Experience

• Bachelor's degree in information security, Computer Science, and / or Matric with 6–8 years Network Security experience.
• CCNP Security, CISSP or equivalent industry‑recognized security certifications.
• Minimum of 7 years experience in network security engineering or related discipline.
• Proven experience managing and maintaining enterprise‑grade security infrastructure.
• Demonstrated expertise in incident response, threat mitigation and vulnerability remediation.
• Experience working within regulated environments and adhering to ISO/IEC 27002.

Key Skills and Competencies

Technical Expertise

In‑depth knowledge of network protocols, Cisco firewall configurations and perimeter defense technologies.

Security Tools Proficiency

Hands‑on experience with Web Application Firewalls (WAF), Next‑Generation Firewalls (NGFW), IPS, DDoS protection tools, SIEM platforms and Cisco ISE.

Vulnerability Management

Strong understanding of OWASP Top 10 vulnerabilities and the ability to assess, remediate and mitigate risks across cloud and on‑premise environments.

Incident Response

Skilled in detecting, analyzing and responding to network security incidents and conducting forensic investigations.

Analytical and Problem‑Solving Ability

Exceptional troubleshooting and diagnostic skills to identify and resolve complex network security issues.

Regulatory and Compliance Awareness

Familiarity with cybersecurity frameworks and standards, particularly ISO/IEC 27002 and related regulatory obligations.

Documentation and Reporting

Ability to maintain technical records, incident logs and support audit and risk reporting.

Collaboration and Communication

Strong interpersonal skills to work across technical teams and convey security issues to non‑technical stakeholders.

Work Level

Senior

Job Type

Contract

Salary

Market Related

Duration

1 - 2 Years

EE Position

No

Location

Pretoria

Key Skills

• Network security, Protocols, ASA, TCP/IP, Routers, Windows, Access Control, Information Security, Infrastructure, Linux, IOS, Servers, Troubleshoot, Intrusion Detection, SIEM

Employment Type

Contract

Experience

years

Vacancy

1