Senior Network & Systems Administrator

Recruiter:

Communicate Recruitment

Job Ref:

CTI007012/LB

Date posted:

Tuesday, September 8, 2026

Location:

Johannesburg, South Africa

Salary:

550 000 Annually

SUMMARY:
Are you the person who enjoys solving the infrastructure challenges that others avoid? Do you thrive in environments where your expertise directly impacts uptime, security, performance, and business continuity?
My client is looking for a Senior Network & Systems Administrator to take ownership of a diverse and business-critical infrastructure environment. This is an opportunity to work with enterprise networking, Microsoft technologies, virtualisation, cloud services, and cybersecurity while playing a key role in keeping critical systems secure, connected, and operating at their best.
If you're looking for IT jobs that offer technical variety, infrastructure ownership, career growth, and exposure to modern technologies, this could be the ideal next step.

POSITION INFO:

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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