Senior Network & Systems Administrator

Job Description

As the Senior Network & Systems Administrator, you will be responsible for the performance, security, maintenance, and optimisation of network and server infrastructure across multiple business operations. Key responsibilities include:

• Managing and maintaining LAN, WAN, VPN, VLAN, Wi-Fi, and internet connectivity
• Monitoring infrastructure performance and proactively resolving issues before they impact users
• Configuring and supporting routers, switches, wireless infrastructure, access points, and firewalls
• Administering Microsoft Active Directory and Microsoft 365 environments
• Supporting hybrid infrastructure and cloud connectivity
• Implementing and maintaining network security controls and secure remote access solutions
• Managing Windows Server environments and virtualised infrastructure
• Overseeing backup strategies, disaster recovery readiness, and business continuity initiatives
• Leading infrastructure upgrades, migrations, and improvement projects
• Collaborating with vendors, service providers, and internal stakeholders
• Providing technical guidance and mentorship to junior IT professionals

This role offers exposure to networking, cybersecurity, cloud services, Microsoft technologies, infrastructure modernisation projects, and enterprise-scale systems, making it an excellent opportunity for professionals looking to advance their careers in information technology jobs and senior infrastructure positions.

Skills & Experience

• Minimum 5+ years of experience in IT Administration and Network Administration
• Strong networking expertise, including:
• TCP/IP
• DNS
• DHCP
• VLANs
• Routing protocols
• VPN technologies

Experience working with

• Firewalls
• Network switches
• Wireless infrastructure
• Mikrotik RouterOS
• Microsoft Active Directory
• Microsoft 365
• Exchange Online
• Azure Active Directory
• Hyper-V Virtualisation
• Windows Server 2019/2022
• Windows 10/11
• Experience with infrastructure monitoring and performance management tools
• Strong troubleshooting, analytical, and problem-solving skills
• Excellent communication and stakeholder management abilities
• Ability to work independently and take ownership of critical systems
• Strong attention to detail and ability to perform in a fast-paced environment

Qualification

• Matric
• A+ and/or N+
• Microsoft Certification or Microsoft Engineer Certification
• MCITP
• Network Security+
• Diploma in IT Systems Administration (NQF Level 4/5) or similar qualification

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