Johannesburg: Network Specialist posted by Sabenza IT & Recruitment

The Network Administrator is 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 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 optimization 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 use