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Sabenza IT & Recruitment

Senior Network Engineer

Sabenza IT & Recruitment Roodepoort, Gauteng, South Africa

IT Services and IT Consulting · 11-50 employees

19 h ago
network-engineer Senior (5-10 yrs) Full-time South Africa
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About the role

The Senior Network Engineer is responsible for the daily operational administration, performance, and security of network infrastructure across all company sites. This includes managing routers, switches, firewalls, and coordinating with vendors to ensure service availability and incident resolution.

What they look for

Network Infrastructure LAN WAN Wireless Infrastructure Firewalls VPN DMZ Troubleshooting Network Security Vendor Management SLA Management Technical Documentation Cisco Fortinet Palo Alto ITIL

Requirements

Candidates must hold a National Diploma or Bachelor's Degree in Information Technology along with relevant certifications such as CCNA, CCNP, or CompTIA Network+. A minimum of 5 years of experience in enterprise networking and strong troubleshooting skills are required.

Full description

We are seeking a Senior Network Engineer who will be responsible for the day-to-day operational administration, availability, performance, and documentation of the network infrastructure across all sites. This role ensures stable, secure, and efficient network services while meeting agreed service levels and supporting business operations.

Responsibilities

Network Infrastructure Operations

  • Perform

day-to-day operational administration of network infrastructure, including: Routers, switches, and wireless infrastructure.

  • Internet

access services.

  • Wide

Area Network (WAN) infrastructure and services.

  • Local

Area Network (LAN) infrastructure and services.

  • Manage

and support:

  • DMZ,

firewall, VPN, APN, and proxy infrastructure and services.

  • Fixed

infrastructure, including fibre and Ethernet cabling.

  • Maintain

and oversee network patch rooms and network-related areas across all Clover sites

Performance & Monitoring

  • Ensure

system performance and availability targets are met in line with agreed Service Level Agreements (SLAs).

  • Monitor

network infrastructure through the outsourced Network Operations Centre (NOC).

  • Proactively

identify and resolve network performance, availability, and security issues.

Vendor & Stakeholder Management

  • Work

closely with third-party service providers to ensure efficient operations and service delivery.

  • Coordinate

with vendors for incident resolution, maintenance, and upgrades.

  • Liaise

daily with users and resolve network-related calls and incidents.

Documentation & Standards Create, maintain, and update:

  • Network

architecture diagrams for all Clover installations.

  • Logical

network diagrams within the assigned area of responsibility.

  • Standard

Operating Procedures (SOPs) within area of responsibility.

  • Accurate

and up-to-date documentation for network configurations and processes.

Projects & Continuous Improvement

  • Manage

and participate in small network-related projects within area of responsibility.

  • Assist

with network upgrades, changes, and optimisation initiatives.

  • Identify

opportunities to improve network reliability, performance, and operational efficiency.

Qualifications:

  • Matric

and National Diploma or Bachelor's Degree in Information Technology.

  • Cisco

Certified Network Associate (CCNA)

  • Cisco

Certified Network Professional (CCNP)

  • CompTIA

Network+

  • Fortinet

/ Palo Alto / firewall-related certifications

  • ITIL

Foundation

Skills

  • Strong

knowledge of enterprise networking (LAN, WAN, wireless).

  • Understanding

of firewalls, VPNs, DMZs, and security best practices.

  • Experience

working with ISPs and managed service providers.

  • Strong

troubleshooting and problem-solving skills.

  • Ability

to document technical environments clearly and accurately.

  • Good

communication skills with both technical and non-technical users.

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