2,100,493open jobs
129,309companies
242,356added this week
Browse all
Location
In office (Johannesburg)
Seniority
Staff
Employment
Full-Time

First seen by Alion on Oct 29, 2026.

Overview
Company
Impact
Profile match
About us Jackie.S 2022-09-16T10:34:24+02:00 MISSION STATEMENT Optimal Growth Technologies provides organizations of all sizes with the best, most trustworthy solutions.

Job Summary:

  • We are looking for a highly experienced Network Architect with 10+ years of experience in designing, implementing, and securing complex enterprise networks.
  • The ideal candidate must have strong expertise in network security, cloud networking, and enterprise infrastructure, ensuring high availability, security, and scalability of network environments.

Key Responsibilities:

Network Architecture & Design:

  • Design and implement scalable, high-performance network architectures for enterprise environments. Define and enforce networking standards, policies, and best practices.
  • Develop secure, redundant, and high-availability network designs for data centers, branch offices, and cloud environments. Evaluate and recommend network technologies, hardware, and software to optimize performance.

Firewall & Security:

  • Configure, manage, and optimize next-generation firewalls and network security devices. Design and implement firewall policies, rule sets, and security zones to align with industry best practices.
  • Conduct firewall performance tuning, troubleshooting, and security audits. Implement intrusion detection and prevention (IDS/IPS) solutions and enforce Zero Trust Network principles. Stay updated with emerging technologies, threat intelligence, and security patches.

Network Administration & Optimization:

  • Oversee the configuration, monitoring, and maintenance of enterprise LAN, WAN, MPLS, SD-WAN, and VPN infrastructures. Implement QoS, traffic shaping, and network segmentation to enhance performance and security.
  • Ensure network redundancy, failover, and load balancing for mission-critical applications. Troubleshoot complex network performance issues and lead root cause analysis.

Cloud & Hybrid Networking:

  • Design and implement secure cloud networking solutions on AWS, Azure, and Google Cloud. Integrate cloud-native security controls and firewalls. Deploy VPNs, ExpressRoute, Direct Connect, and SD-WAN solutions for hybrid cloud connectivity. Ensure secure API and container-based networking within cloud and microservices environments.

Network Security & Compliance:

  • Ensure compliance with ISO 27001, NIST, PCI-DSS, GDPR, and other regulatory standards. Implement Zero Trust Security, Network Access Control (NAC), and micro-segmentation. Conduct vulnerability assessments, penetration testing, and risk mitigation for network security. Work with cybersecurity teams to integrate SIEM (e.g., Splunk, Sentinel, QRadar) and threat intelligence solutions.

Network Automation & Monitoring:

  • Deploy and manage network monitoring tools (e.g., SolarWinds, PRTG, Nagios, Zabbix) for proactive issue detection. Automate network operations using Python, Ansible, Terraform, and REST APIs. Implement log management and correlation for security event detection. Optimize network configuration management using NCM and compliance reporting tools.

Technical Leadership & Documentation:

  • Act as a subject matter expert (SME) for networking and security architectures. Provide mentorship and technical guidance to junior network engineers and security teams. Develop and maintain network diagrams, SOPs, technical documentation, and security policies.
  • Collaborate with cross-functional teams (Cloud, Security, DevOps, Infrastructure) to align network strategies with business goals.

Required Skills & Qualifications:

Education & Certifications:

  • Bachelor's or Masters degree in Computer Science, Network Engineering, or a related field.
  • Cisco CCNP/CCIE (Enterprise, Security, or Data Center) Preferred
  • Fortinet NSE4/NSE7 Advantageous
  • Palo Alto PCNSE Advantageous
  • AWS or Azure Networking Certifications (e.g., AWS Advanced Networking, Azure Network Engineer Associate)

Technical Skills:

  • Expert-level experience with enterprise firewall platforms and security policies.
  • Strong expertise in network protocols (BGP, OSPF, EIGRP, VXLAN, MPLS, SD-WAN).
  • Experience with Cisco, Juniper, Palo Alto, Fortinet, and Aruba network solutions.
  • Hands-on knowledge of Layer 2/3 switching, VLANs, STP, and redundancy protocols (HSRP, VRRP, GLBP).
  • Proficiency in network security solutions (NGFW, IPS/IDS, SIEM, NAC, DDoS protection).
  • Deep understanding of cloud networking (VPC, VNET Peering, Direct Connect, ExpressRoute).
  • Scripting and automation skills in Python, Ansible, Terraform, or PowerShell.

Soft Skills:

  • Strong analytical and problem-solving abilities.
  • Excellent communication, documentation, and stakeholder management skills.
  • Ability to lead teams, mentor engineers, and manage multiple projects simultaneously.
  • Self-motivated with a passion for cybersecurity, network engineering, and automation.
Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
2,100,493 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account Continue with Google
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Networking
Similar stack
Same company
Johannesburg
In office · Full-Time · Centurion
DevOps
Windows Server
Cybersecurity
FortiGate
Apply
In office · Full-Time · Gqeberha
DevOps
Docker
Linux
VPN
Apply
In office · Full-Time · Johannesburg
Python
PowerShell
DevOps
Rest API
Splunk
Terraform
Ansible
GCP
Zabbix
Azure
AWS
Configuration Management
Nagios
VPN
BGP
OSPF
MPLS
Cybersecurity
ISO 27001
PCI DSS
GDPR
Zero Trust
IBM QRadar
SIEM
Apply
In office · Full-Time · Cape Town
Python
PowerShell
DevOps
Rest API
Splunk
Terraform
Ansible
GCP
Zabbix
Azure
AWS
Configuration Management
Nagios
VPN
BGP
OSPF
MPLS
Cybersecurity
ISO 27001
PCI DSS
GDPR
Zero Trust
IBM QRadar
SIEM
Apply
In office · Full-Time · 5+ years exp · Johannesburg
Apply
In office · Full-Time · 5+ years exp · Bachelor's Degree · Istanbul · Johannesburg · Cairo · Casablanca · Tunis
Apply
In office · 7+ years exp · Bachelor's Degree · Johannesburg
Management
Agile
Apply
Tax Manager 3 hours ago
Hybrid · Full-Time · Johannesburg
Apply
In office · Full-Time · 3+ years exp · Bachelor's Degree · Johannesburg
Apply
Warehouse Manager 4 hours ago
$18k – $22k per year (gross) · In office · Full-Time · Johannesburg
Apply
See all jobs
This is one of many
2,100,493 more open roles from verified company boards, updated every day.