Senior Network Administrator

South African Radio Astronomy Observatory; Cape Town; On-site; ZAR 400,000 - 550,000; Full time

Job summary

A leading technology organization in Cape Town seeks a Senior Network Administrator to implement and support network services and directives from the security team. The role involves monitoring network performance, managing networking equipment, and documentation. Ideal candidates should have a National Diploma or B.Eng/B.Sc in a related field with significant experience in network operations. A strong background in TCP/IP, Linux, and network security is essential.

Qualifications

• 5+ years of experience in network operations and service support.
• Experience working with helpdesk as a support technician.
• Proficient in documenting network architecture.

Responsibilities

• Maintain and manage networking switches and routers.
• Develop and manage documentation of the system architecture.
• Respond to break-fix issues on networking equipment.

Skills

TCP/IP knowledge

Routing

Networking switch and router configuration

Linux operating system

Network monitoring tools

Education

National Diploma Engineering / IT

B.Eng / B.Sc Hons (Comp Sci / Engineering)

Tools

Cisco

HPE

Proxmox

Docker

Job description

Job title : Senior Network Administrator

Job Location : Western Cape, Cape Town Deadline : August 24, 2025 Quick Recommended Links

• Jobs by Location
• Job by industries
• The purpose is to implement and support organizational-wide network services, and directives from the Security team and maintain networking documentation. The candidate will monitor and support network equipment, do performance monitoring on existing networks, and provide second-line support to the helpdesk. The candidate will contribute to design, planning, ongoing improvements and assist with forecasting future requirements.

Key Responsibilities :

Maintain and manage, in conjunction with networking team, networking switches and routers conforming to requirements from Networking Security Team

Develop, manage and maintain documentation of the system architecture.

Develop and maintain database of existing networking equipment, location, serial number, model, configuration management.

Manage, in conjunction with networking team, maintenance of networking kit, spares provisioning, stores replacement, capacity planning, optics, line cards etc.

Maintain and manage, in conjunction with networking team, servers both physical and virtual (Proxmox based on KVM) running Linux and Microsoft Windows Server Edition.

Maintain and manage, in conjunction with networking team, server room level networking and availability.

Respond, in conjunction with the networking team, to break-fix issues on networking equipment.

Key Requirements : Qualification :

National Diploma Engineering / Information Technology 5+ years; OR

B.Eng / B.Sc Hons (Comp Sci / Engineering or related field) with 3+ years

Experience :

Working as a technical resource on network infrastructure

Experience in network operations and service support

Experience working with helpdesk as a support technician

Experience monitoring and responding proactively to network and IT issues

Experience monitoring, implementing and updating network security services

Experience working with virtual networks, namespace management

Experience interpreting and updating network designs

Knowledge :

Documenting network architecture at various OSI levels.

Operating systems experience : Windows, Linux (Debian / Ubuntu), OS X

Networking in virtual environments in particular KVM via Proxmox Enterprise Virtualisation as well as containerised environments such as Docker

Networking security best practice; Firewall configuration and management.

Maintenance and operation life cycle of Networking Equipment.

Identity and Access Management, Single Sign-on and Federated Identity (IdP and SP)

ITIL frameworks and ICT operations

Additional Notes :

Skills / Ability / Competencies

Good working knowledge of TCP / IP, Routing, DNS, DHCP, OSI Stack, VPN.

Networking switch and router configuration – Cisco, HPE, Mellanox, Arista

Experience in networking monitoring tools and support packages.

Good understanding of Linux operating system, Opensource software and networking tools.

Well-developed knowledge of systems / services for software / hardware development, how this relates to IT networking, security,

storage and computing.Strategic thinking and influence

Initiative and continually brings fresh ideas to the table

Deadline : 29th July,2025

ICT jobs