Our client, a well-established group operating across multiple industries, is seeking to appoint an experienced Senior Network Administrator join their team based in City Deep, Johannesburg. The Senior Network Administrator is responsible for the configuration, maintenance, security, and performance of the organisation’s network infrastructure. The role ensures stable connectivity, optimal system performance, and provides expert-level support for complex technical issues. Requirements Matric A+ and N+ Certification Microsoft Certification / Engineer MCITP Network Security+ Diploma in IT Systems Administration (NQF Level 4/5 advantageous) Minimum 5+ years’ experience in IT administration and networking Hands‑on experience in enterprise network environments TCP/IP, DNS, DHCP, VLANs, routing protocols Firewalls, switches, wireless infrastructure Microsoft Active Directory and Microsoft 365 environments Windows Server (2019/2022) and Windows 10/11 Hyper‑V virtualization VPNs (site‑to‑site and client) Mikrotik RouterOS Network monitoring tools VOIP systems Cloud technologies (Azure, Exchange Online) Responsibilities Network Operations and Connectivity Manage LAN, WAN, VPN, VLAN, Wi‑Fi, and internet connectivity Monitor network performance and resolve complex issues Configure and maintain routers, switches, firewalls, and access points Maintain documentation of network configurations and procedures Ensure connectivity between on‑premise and cloud environments Manage network emergencies and failover testing Liaise with service providers and vendors Provide mentorship to junior IT staff Network Security Implement and maintain firewalls and access control policies Support vulnerability management and patching Ensure secure remote access for users Identify and mitigate security risks proactively Installations, Upgrades and Maintenance Plan and execute network upgrades and migrations Maintain firmware updates and configuration standards Manage server environments and user access controls Ensure successful backups and disaster recovery processes Monitor and optimise system performance (CPU, RAM, storage) IT Projects Assist with group‑wide IT projects and system improvements Skills and Competencies Advanced IT and networking knowledge Strong problem‑solving and analytical ability Excellent communication and interpersonal skills Customer service orientation Attention to detail and consistency Ability to work under pressure and manage multiple priorities Strong initiative and self‑management Project management capability Personal Attributes Accountable and takes ownership Efficient and results‑driven Organised and systematic Team player Driven and proactive Growth mindset Please note that should you not receive a response within 2 weeks of applying, you may consider your application unsuccessful. #J-18808-Ljbffr