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Johannesburg: 💫 Network Administrators [CCNA, ACSA, Fortigate]

Johannesburg: 💫 Network Administrators [CCNA, ACSA, Fortigate]

Posted on 2025-09-08 00:00:00

Employer Unspecified
Category IT / Computing / Software
Location Gauteng  / Johannesburg

Job Summary

Location: Predominantly Benoni-based, with travel to data centres and other sites as required Occasional after-hours callouts (weekends and public holidays) Scheduled standby and callout shifts Job Summary The Network Administrator is responsible for securing, maintaining, and optimizing the organizations computer systems and data communications network. This includes ensuring high availability, security, and efficiency of network infrastructure across all sites. Key Performance Areas (KPAs) Network Infrastructure Planning and Setup Design and specify network requirements and solutions Implement, configure, and maintain LAN and WAN environments Assist System Administrators with network configurations Plan and report on network capacity Coordinate reciprocal network support with third-party vendors Contribute to risk mitigation, knowledge sharing, and incident response planning Monitor network traffic and update incident response plans Network Infrastructure Maintenance Manage user accounts, permissions, and passwords via Active Directory Install and configure network equipment and server hardware/software Administer third-party network and firewall applications Maintain systems including virtual hosts, VPNs, routers, and hardware Optimize network performance based on business needs Monitor and respond to security alerts and incidents Test network performance (availability, utilization, throughput, latency) Update antivirus software and diagnose root causes of issues Resolve performance issues and escalate support queries Provide remote infrastructure support within SLA Monitor capacity thresholds and respond accordingly Research and Development Identify and review software updates, patches, and firmware Recommend improvements to server operations Stay current with networking best practices and technologies Administrative Functions Define and document network policies and procedures Communicate issues to IT teams and management Resolve escalated configuration issues Track system lifecycle and recommend replacements Document systems and plan new implementations Maintain positive relationships with internal stakeholders Additional Responsibilities Support System Administrators with cross-functional tasks Liaise professionally with third-party providers Advise Maintenance team on UPS and system failures Retrieve camera footage for managerial review Occasional night-time driving and work Physical Requirements Ability to carry loads of at least 20 kg Work at heights and in confined spaces Qualifications Essential A and N Certifications Linux LPIC-1 OR Equivalent NQF Level 7 certification (e.g., CCNA, ACSA, FortiGate) Desirable MCSE, MCIPT JNCIA FortiGate NSE 4 Experience Essential Proven experience as a Network Administrator Experience designing and implementing routing/switching in large-scale, multi-vendor networks (Aruba, Cisco, Juniper) Direct experience in network security (e.g., Juniper, FortiGate) Hands-on experience with Aruba and Juniper routing/switching Wireless network experience (e.g., Unifi) Firewall and VPN implementation and troubleshooting Experience with Sentinel One and Gytpol Desirable Windows Server 20162019 experience Infrastructure and Linux Server experience VMware ESXi experience Knowledge and Skills Backup and recovery methodologies Deep understanding of internet protocols and standards Network automation, telemetry, and SDN Network security standards and best practices Physical cabling knowledge Server infrastructure management Strong scripting and troubleshooting skills Excellent communication, problem-solving, and organizational abilities

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