Network/Security Administrator – Centurion
Other
Pretoria/Centurion – Gauteng – South Africa
ENVIRONMENT:
A Software Company with a focus on digital transformation is seeking a motivated and detail-oriented Network/Security Administrator with over 2–4 years of hands-on experience in configuring, maintaining, and securing enterprise networks. Cisco Certified Network Associate (CCNA) with proven expertise in LAN/WAN infrastructure, firewall policies, VPN deployment, and network monitoring. Adept at identifying vulnerabilities, optimizing network performance, and responding to incidents in compliance with best practices and organizational policies.
DUTIES:
- Configure and troubleshoot Cisco routers and switches in enterprise environments.
- Maintain network security through access control lists (ACLs), firewall rules, and intrusion prevention systems.
- Manage VPN access for remote users and branch offices.
- Monitor network traffic and performance to detect anomalies or malicious activity.
- Implement routine security patches and firmware updates on network devices.
- Collaborate with security teams to support audits and compliance checks.
- Respond to and document Tier 1 and Tier 2 security incidents.
- Maintain up-to-date network diagrams and documentation.
REQUIREMENTS:
Technical Skills:
- Networking: Cisco routing and switching (IOS configuration, EIGRP, OSPF, VLANs, STP)
- Security: Firewall administration (Cisco ASA, Palo Alto, Fortinet); VPN setup (IPSec, SSL); IDS/IPS; Network Access Control (802.1X, NAC)
- Tools: Network monitoring (SolarWinds, Nagios, Wireshark); Vulnerability scanning (Nessus); SIEM tools (Splunk, Graylog, ELK stack)
- Systems: Windows Server, Active Directory; Linux
- Administrative: ITIL / Ticketing systems (e.g., ServiceNow); Basic scripting (Python, Bash)
Certifications:
- Cisco Certified Network Associate (CCNA)
- (Optional) CompTIA Security+
- (Optional) Cisco Certified CyberOps Associate
Technical Environment:
- Cisco Catalyst and ISR series
- Cisco ASA or Firepower
- Windows Server, Active Directory
- Linux for monitoring/security tools
- Syslog servers, SIEM tools (Splunk, Graylog, or ELK stack)
ATTRIBUTES:
- Strong analytical and troubleshooting skills
- Effective communicator with cross-functional teams
- Process-oriented with an eye for documentation
- Continual learner with a strong interest in cybersecurity