Johannesburg: IT Network Administrator (2nd Line Support) (Sandton Onsite) posted by Datafin
Posted on 2025-05-06 00:00:00
| Employer | Datafin |
|---|---|
| Category | Other IT/Computer |
| Location | Gauteng / Johannesburg |
Job Summary
Johannesburg – Gauteng – South Africa
- Provide advanced 2nd Line IT support for software, hardware and network issues escalated from 1st Line Support.
- Diagnose and resolve complex IT problems, ensuring system reliability.
- Act as a key IT contact for internal teams, providing expert advice and solutions.
- Monitor network and IT infrastructure to proactively detect and resolve issues.
- Lead PC setup, software configurations and pre-deployment testing.
- Conduct network troubleshooting and optimisation to ensure secure, stable connectivity.
- Provide remote deployment support for software and hardware installations at customer sites.
- Manage and configure Active Directory, Group Policies, DNS, DHCP and VPNs.
- Optimise network performance and diagnose connectivity issues (e.g. slow speeds, packet loss).
- Maintain and troubleshoot LAN/WAN, VLANs, Firewalls, Routers and Switches.
- Manage firewalls (Cisco, Fortinet, MikroTik) and VPN configurations.
- Implement cybersecurity measures to protect network integrity and prevent threats.
- Utilise network monitoring tools (e.g. Zabbix, PRTG, SolarWinds) for real-time performance tracking.
- Assist in data protection, user access controls and IT security best practices.
- Develop and maintain detailed as-built documentation for network and system configurations.
- Document troubleshooting steps to improve the knowledge base and incident response efficiency.
- Continuously enhance IT operations by analysing past incidents and recommending improvements.
- Microsoft Certified: Azure Administrator Associate (MCSA, MCSE). Or (AWS Certified).
- Cisco Certified Network Associate (CCNA) or higher (CCNP). Or (Juniper Network Certifications).
- CompTIA Network+ (Networking Fundamentals).
- ITIL Foundation (IT Service Management & Incident Response).
- Zabbix Certified Specialist (For monitoring system administration). Or (Similar).
- 5 Years of experience in IT Support, Network Administration, or System Administration.
- Proven experience in troubleshooting escalated IT issues (2nd Line Support).
- Strong knowledge of network configurations, firewall management and security protocols.
- Hands-on experience with Active Directory (AD), Group Policies and Microsoft 365 Administration.
- Experience in troubleshooting Windows 10/11, Linux (Ubuntu/CentOS) and macOS systems.
- Experience in remote IT support tools (RDP, TeamViewer, AnyDesk, PowerShell).
- Proficient in configuring and managing routers, switches and firewalls.
- Hands-on experience in LAN/WAN troubleshooting, VLAN setup and VPN administration.
- Strong knowledge of Wi-Fi networks, subnetting and IP addressing.
- Experience in server administration (Windows Server, Linux).
- Basic scripting knowledge (PowerShell, Bash, or Python) for IT automation.
- Understanding of Cybersecurity principles (Access Control, MFA, Security Audits).
- Knowledge of SIEM tools (Splunk, ELK, Graylog) and endpoint security solutions.
- Proficient in firewall management and intrusion detection systems.
- Familiarity with patch management and OS updates (WSUS, SCCM, Intune).
- Experience with cloud environments (Azure, AWS, Google Cloud).
- Managing virtualisation (VMware, Hyper-V, Proxmox).
- Supporting remote users via VPNs, cloud applications and remote desktop tools.
- Problem-Solving & Troubleshooting Ability to diagnose and resolve complex IT issues quickly.
- Communication & Collaboration Can explain technical concepts to non-technical users.
- Initiative-Taking Attitude Proactively identifies, troubleshoots and resolves IT issues.
- Teamwork & Knowledge Sharing Works well in cross-functional teams and can mentor junior staff.
- Adaptability Keeps up with modern technologies, evolving IT needs and business changes.
- Documentation & Reporting Ability to write clear technical documentation and reports.
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