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Vacancies

IT Network & Infrastructure Administrator

Infrastructure
Johannesburg – Gauteng – South Africa

IT Network & Infrastructure Administrator
Mid to Senior Level
Salary: R30k – R50k + Benefits
Area: JHB South
Type: Onsite
 
This is a strong opportunity for an experienced IT professional with solid hands-on networking experience who enjoys keeping business-critical systems connected, secure, stable and running properly.
 
The client is looking for someone who is not only comfortable with general infrastructure support, but who has a strong networking backbone. You should be confident working across LAN, WAN, VPN, VLANs, routers, switches, firewalls, wireless infrastructure and Mikrotik environments.
 
You will support a well-established group with multiple operating sites, where reliable connectivity is essential to daily operations. This role suits someone who can troubleshoot properly, take ownership of network issues, support server and Microsoft environments, and keep infrastructure running with as little disruption as possible.
 
The environment includes routing and switching, VPNs, VLANs, Mikrotik RouterOS, firewalls, wireless infrastructure, Active Directory, Microsoft 365, Azure AD, Windows Server, Hyper-V and secure remote access.
 
Responsibilities
    • Manage, maintain and improve the company’s network and IT infrastructure across multiple sites
    • Support and troubleshoot LAN, WAN, VPN, VLAN, Wi-Fi and internet connectivity
    • Configure, maintain and troubleshoot routers, switches, access points, firewalls and related network hardware
    • Manage and support Mikrotik routers and RouterOS configurations
    • Monitor network performance, connectivity, uptime and security risks
    • Troubleshoot network outages, slow connectivity, routing issues, firewall rules, VPN access and wireless problems
    • Maintain secure connectivity between branches, remote users, service providers and cloud environments
    • Support secure remote access for staff and contractors
    • Administer server environments including Active Directory, file permissions and Windows Server 2019/2022
    • Support Microsoft 365 services including Exchange, Azure Active Directory, Teams, OneDrive and SharePoint
    • Support Hyper-V virtual environments
    • Manage backups, recovery processes, patching, firmware updates and failover testing
    • Identify infrastructure and network risks early to reduce downtime and improve security
    • Assist with network upgrades, infrastructure improvements, hardware replacements and migrations
    • Work with vendors and service providers where required
    • Keep network diagrams, configurations, procedures and documentation accurate and up to date
    • Guide junior team members on infrastructure and network-related tasks
 
Requirements
    • 5+ years’ experience in IT infrastructure, network administration or senior technical support
    • Strong hands-on networking experience across TCP/IP, DNS, DHCP, VLANs, routing, VPNs, firewalls, switches and wireless infrastructure
    • Proven experience configuring and troubleshooting routers, switches, access points and firewalls
    • Strong working knowledge of Mikrotik RouterOS
    • Experience supporting multi-site network environments would be highly advantageous
    • Solid understanding of network security, remote access, firewall rules and secure connectivity
    • Experience with network and infrastructure monitoring tools
    • Solid experience with Microsoft Active Directory and Microsoft 365 environments
    • Good knowledge of Windows Server 2019/2022 and Windows 10/11
    • Experience with Hyper-V virtualisation
    • Good understanding of backups, disaster recovery, business continuity and IT security
    • A+ and N+ plus Microsoft certification or engineering certification preferred
    • MCITP and Network Security+ will be advantageous
    • Diploma in IT Systems Administration, NQF Level 4/5, preferred
    • Strong troubleshooting, problem-solving and communication skills
    • Able to work under pressure, manage multiple priorities and stay thorough
    • Reliable, organised, proactive and comfortable taking ownership
 
Ideal Fit
This role will suit someone who enjoys being close to the network layer of IT. Someone who can look at a connectivity issue, follow the trail properly, and not just restart things until the lights come back on.
 
You should be hands-on, practical and confident working in an onsite environment where infrastructure reliability matters.
 
If you are an infrastructure professional with strong networking experience and you enjoy keeping systems connected, secure and stable, apply now.