L3 Senior Network Engineer

About

Our client based in Isando is looking for a L3 Senior Network Engineer who bridges the gap between Engineering and Architecture, ensuring the resilience, compliance, and future-readiness of enterprise networking, with clear progression into the Network Architect role (enterprise-level strategy and design authority). The role provides expert-level support across RUN (stability and resilience of the network estate), GROW (advanced optimisation, automation, and integration), and TRANSFORM (strategic network modernisation, SDN, cloud and hybrid connectivity programmes).

Duties & Responsibilities

Key Deliverables:

Advanced Network Design and Implementation

• Lead design and implementation of enterprise-scale networks
• Architect resilient, secure, and scalable network solutions
• Ensure integration with cloud and hybrid environments.

Escalation and Advanced Troubleshooting

• Act as a third-line escalation for critical incidents
• Lead root cause analysis and systemic improvements
• Coordinate with vendors for complex fault resolution.

Security and Compliance

• Partner with Cybersecurity to enforce enterprise security controls
• Implement segmentation, IDS/IPS, and zero-trust networking
• Ensure compliance with regulations (POPIA, GDPR, ISO27001)
• Maintain audit trails, logs, and reports for security and compliance purposes.

Optimisation and Innovation

• Analyse trends and recommend automation or SDN approaches
• Drive efficiency improvements in performance, monitoring, and costs
• Evaluate and test new network technologies
• Drive efficiency through proactive monitoring, predictive analytics, and capacity planning.

Project and Transformation

• Lead the network workstreams of GROW/TRANSFORM initiatives
• Provide technical expertise to enterprise architecture forums
• Mentor Level 1–2 Engineers and build team capability.

Mentorship and Knowledge Sharing

• Mentor and coach Engineers (L1–L2) to build team capability
• Produce technical documentation, playbooks, and best practice guides
• Build knowledge base content to support operational teams
• Identify recurring issues and suggest service improvements for best practices
• Actively engage in training programmes, mentorships, and peer learning activities.

Qualifications & Experience Required:

• Matric plus NQF Level 7 Qualification in Information Technology, Computer Science, or Network Engineering or related field
• Professional-level certification (Cisco CCNP, Juniper JNCIP, or equivalent)
• ITIL Foundation certification
• Valid Driver’s License.
• Expert-level certifications (Cisco CCIE, Fortinet NSE 8, etc.) - advantageous
• Cloud networking certifications (AWS Advanced Networking, Azure Network Engineer Expert) - advantageous
• Cybersecurity certifications relevant to networking (e.g., CISSP, CCSP) - advantageous
• 7–9 Years in enterprise network engineering roles
• At least 3+ years in a senior or advanced capacity
• Proven track record in WAN, LAN, WLAN, VPN, and firewall implementations at enterprise scale
• Experience integrating networks with cloud and hybrid environments
• Proven track record in designing and delivering enterprise-scale network solutions
• Experience with WAN, LAN, WLAN, VPN, and hybrid cloud networking at scale.