Heinrich Jacobs
Heinrich Jacobs

Senior Network & Security Engineer / Network Architect

Actively looking · Member since 19 Oct 2026
Location
pretoria, South Africa
Desired salary
90k–180k USD/yearly
Work preference
Remote Only / Full Time
Experience level
Senior

About

Professional summary

I am a Senior Network & Security Engineer and Network Architect with more than 15 years of hands-on experience in designing, implementing, securing, and troubleshooting enterprise and multi-site infrastructure.

I specialise in resilient LAN/WAN connectivity, routing and switching, including BGP, OSPF, VLANs, MikroTik, and fixed-wireless ISP environments. I design network architectures that prioritise availability, segmentation, and Zero Trust security principles.

My security experience includes Sophos, Fortinet, SonicWall, and WatchGuard firewalls, VPNs, SD-WAN, secure remote access, endpoint protection, and security operations. I also work extensively with Windows Server, Active Directory, Group Policy, Exchange, Microsoft 365, and SQL Server administration.

I am trusted to handle complex Level 3 escalations, root-cause analysis, incident, problem, and change management. I have led service delivery operations, improved SLA performance, and developed service improvement plans for business-critical environments.

I lead technical projects from requirements gathering and solution scoping through architecture, implementation, documentation, handover, and ongoing optimisation. I am seeking a permanent, fully remote senior engineering or network architecture role with an international team while based in South Africa.

Notice period: 1 month

Skills

28 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Remote Senior Network & Security Systems Specialist Argonaut Solutions

I apply routing and switching expertise, including BGP and OSPF, to resolve complex connectivity issues and support resilient network designs across MikroTik and fixed-wireless ISP environments.

I design and optimise core network infrastructure with a focus on availability and Zero Trust principles. I deploy Sophos and Fortinet firewall environments, including SD-WAN integrations, act as a Level 3 escalation point, and lead projects from requirements scoping through implementation and handover.

Senior Network Engineer & Architect Conekt

Designed and deployed network solutions for enterprise data centres and complex multi-site environments.

Maintained technical roadmaps, aligned deployments with security standards and ITIL practices, investigated performance bottlenecks, and produced high-level and low-level physical and logical network topology diagrams.

Senior Support Technician & Service Delivery Lead Zinia

Led daily operations for a 24/7/365 service desk, including team capacity planning, quality checks, SLA monitoring, and stakeholder performance reporting.

Improved incident, problem, and change processes; developed service improvement plans and root-cause analyses; and configured enterprise routers, switches, and firewalls for high-tier clients.

Senior Systems & Network Engineer Network Integrated Technologies

Designed secure LAN/WAN architectures and redundant connectivity solutions for national clients. Delivered server migrations and infrastructure upgrades across Windows Server 2012 to 2019 environments.

Managed Backup Exec and Acronis backup and recovery strategies, supported infrastructure budgeting and service costing, and implemented endpoint security and firewall solutions for multi-branch organisations.

Infrastructure & Systems Administrator True North Franchising (Pty) Ltd

Managed IT infrastructure and business-as-usual operations for a national franchise network. Implemented network security controls and VPN-based remote access for regional offices.

Coordinated procurement, configuration, and maintenance of server and network hardware. Administered Active Directory, user permissions, security groups, and Group Policy Objects.

IT Technician / Systems Engineer Elnatan IT Solutions

Provided Tier 1 and Tier 2 support for Windows Server, Active Directory, and Exchange Server environments from 2003 to 2010.

Installed network cabling, configured switches and VLANs, deployed wireless access points, delivered desktop support and customer service, and managed routine backup and data recovery activities for SME clients.

Education

Learning history

HTS John Vorster

National Senior Certificate (Grade 12), Information Technology, Mechanical Engineering and Technical Drawings

Completed National Senior Certificate with specialised technical subjects in Information Technology, Mechanical Engineering, and Technical Drawings.

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