Where

Network Administrator [LAN, WAN, VPNs, CCNA, ACSA,

Job Placements
Johannesburg Full-day Full-time

Description:

Purpose of the Role

Secure and maintain the organisations computer systems and network. Maintain a reliable, secure, and efficient data communications environment. Key Performance Areas: Plan and Set Up Network Infrastructure Maintain High-Availability Network Infrastructure Conduct Research on Modern Networking Best Practices Perform General Administrative and Documentation Functions Key Tasks by KPA

1. Plan and Set Up Network Infrastructure

Identify network requirements and design appropriate solutions. Implement, configure, and maintain LAN infrastructure. Implement, configure, and maintain WAN infrastructure. Assist System Administrators with necessary network configurations. Plan for and report on network capacity across the organisation. Negotiate and coordinate reciprocal network support and access with third-party vendors. Perform risk mitigation activities, contribute to team knowledge sharing, monitor network traffic, and update the incident response plan.

2. Maintain High-Availability Network Infrastructure

Create and manage user accounts, permissions, and passwords in Active Directory. Install and configure network equipment and address hardware/software issues. Install and integrate new server hardware and applications. Support and manage third-party network and firewall applications. Maintain all computer networks including: Software Virtual hosts VPNs Routers Physical hardware Optimise network performance in line with business needs. Monitor and respond to network security alerts and connectivity incidents. Monitor network performance (availability, utilisation, throughput, latency) and test for vulnerabilities. Update antivirus and security tools to ensure data protection. Diagnose and identify root causes of network and security issues. Research and resolve network performance issues promptly. Provide accurate solutions to issues escalated from 1st-line support. Provide remote infrastructure support and troubleshooting within agreed SLAs. Monitor and respond to new capacity threshold alerts.

3. Research on Latest Networking Practices

Identify and review relevant software updates, patches, and firmware releases. Research and provide recommendations on improvements to server system operations. Stay updated on networking best practices, tools, and methodologies.

4. General Administrative Functions

Assist in defining network policies and procedures. Communicate ne
30 Jan 2026;   from: gumtree.co.za

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