Computer Systems and Networks Engineer with professional experience in IT support, systems administration, network administration, cybersecurity, infrastructure management, and technical operations.
Experienced in supporting enterprise IT environments, maintaining network and systems infrastructure, administering Windows-based environments, managing endpoint and firewall security, monitoring IT infrastructure, and troubleshooting critical technical systems.
My professional interests and technical focus include:
- Network Engineering
- Systems Administration
- IT Infrastructure
- IT Support
- Network Security
- Cybersecurity
- Microsoft 365 & Cloud Technologies
- Network Monitoring
- Infrastructure Security
- TCP/IP
- IP Addressing & Subnetting
- LAN/WAN Administration
- Routing & Switching
- VLANs
- DHCP
- DNS
- Wireless Networks
- Network Troubleshooting
- Enterprise Connectivity
- Cisco Networking
- Cisco ASA
- Cisco Packet Tracer
- Windows 10/11
- Windows Server
- Active Directory
- User & Group Administration
- Access Control
- Permissions Management
- Group Policy
- Microsoft 365
- Server Administration
- Systems Maintenance
- Network Security
- Firewall Administration
- Endpoint Security
- Antivirus Management
- Security Monitoring
- Cyber Threat Management
- Cyber Awareness
- Internet Security
- Access Control
- Security Infrastructure
- FortiGate
- Cisco ASA
- FortiAnalyzer
- Kaspersky Endpoint Security (KES)
- Kaspersky Security Center
- SolarWinds
- CCTV Systems
- Surveillance Systems
- Access Control Systems
- Wireless Access Points
- Fibre Infrastructure
- Telephone Systems
- Hardware & Software Support
- IT Infrastructure Maintenance
- Physical Security Technologies
- Microsoft 365
- Microsoft Azure
- Microsoft Power Automate
- VMware
- VirtualBox
- Cloud Computing
- Cloud Security
August 2025 – Present
Key Deliverables & Achievements
- Ensure high availability and optimal performance of critical systems, servers, and network infrastructure.
- Administer and manage Kaspersky Endpoint Security (KES) through Kaspersky Security Center, including remote deployment, monitoring, patch management, and endpoint protection.
- Manage and maintain LAN/WAN infrastructure, wireless networks, and enterprise connectivity services.
- Administer Active Directory, Microsoft 365, user accounts, permissions, and access control systems.
- Implement and maintain CCTV systems, surveillance infrastructure, and physical security technologies.
- Manage and support the organization's cyber awareness platform.
- Manage ICT contracts and workflow processes using Microsoft Power Automate.
February 2025 – July 2025
Key Deliverables & Achievements
- Optimized LAN and server performance to support uninterrupted live broadcasting.
- Provided rapid technical troubleshooting during live transmissions, minimizing system interruptions.
- Controlled signal transmission systems in the master room to support uninterrupted broadcasts.
- Performed regular system checks and promptly diagnosed and resolved technical issues.
- Maintained consistent signal quality and operational reliability across broadcast systems.
February 2024 – December 2024
Key Deliverables & Achievements
- Configured and managed firewall security solutions, including FortiGate and Cisco ASA firewalls.
- Managed and maintained office networks, telephone systems, wireless access points, and IT infrastructure.
- Diagnosed and resolved technical issues affecting users, systems, and network services.
- Implemented cybersecurity upgrades, antivirus solutions, and internet security improvements.
- Installed and maintained CCTV systems, surveillance cameras, and security lighting systems.
- Supported fibre replacement projects in collaboration with ETL and Public Works teams.
- Monitored system performance and maintained IT operational efficiency.
- Provided technical support for office equipment and infrastructure maintenance.
National University of Lesotho
The programme included Cisco CCNA v7 Modules 1–3, providing a foundation in networking, switching, routing, network services, security fundamentals, and network troubleshooting.
Training completed through Cisco Networking Academy includes:
- Junior Cybersecurity Analyst Career Path
- Network Technician Career Path
- Network Defense
- Endpoint Security
- Network Support and Security
- Introduction to Cybersecurity
- Cyber Threat Management
- Network Addressing and Basic Troubleshooting
- Networking Devices and Initial Configuration
- Networking Basics
- Introduction to Internet of Things
- Introduction to Data Science
- Ethical Hacking — Mobile Platforms and Network Architecture
- Advanced Cybersecurity — Threats and Governance
- Cyber Forensics
- Introduction to Cloud Security
- Introduction to Firewall
- Introduction to Cryptography
- Microsoft Azure Application
- Cloud Foundations — Advanced
- Cloud Computing Architecture
- NetSuite Basics
- Operational Management
- Leadership and Management
- Project Management
- Principles of Management
I am building a practical portfolio of enterprise IT infrastructure, networking, systems administration, cybersecurity, monitoring, and cloud projects.
The projects will demonstrate design, implementation, configuration, testing, troubleshooting, security, and technical documentation.
Technology: Cisco Packet Tracer
Designed and implemented an enterprise network laboratory demonstrating:
- Network topology design
- IP addressing and subnetting
- VLAN implementation
- Inter-VLAN routing
- Routing and switching
- DHCP
- DNS
- Access Control Lists
- Network segmentation
- Connectivity testing
- Network troubleshooting
- Technical documentation
Status: COMPLETED
Technology: FortiGate / Cisco ASA concepts
Designed and implemented a security-focused enterprise network laboratory demonstrating:
- Firewall architecture
- Firewall policies
- Network segmentation
- Access Control Lists
- NAT
- Secure management
- Network security controls
- Endpoint security concepts
- Security monitoring
- Security testing
Status: COMPLETED
Technology: VMware / VirtualBox / Windows Server
Planned virtual enterprise environment demonstrating:
- Windows Server deployment
- Active Directory Domain Services
- Domain Controller
- DNS
- DHCP
- Organizational Units
- Users and groups
- Group Policy
- File and folder permissions
- Windows client domain integration
- Access management
- Security configuration
Status: Planned
Technology: FortiAnalyzer / SolarWinds concepts
Monitoring and security operations project demonstrating:
- Network device monitoring
- Availability monitoring
- Performance monitoring
- Event logging
- Alerting
- Log analysis
- Security event monitoring
- Troubleshooting
- Infrastructure reporting
Status: IN PROGRESS
Technology: Microsoft 365 / Microsoft Azure
Cloud administration project demonstrating:
- Identity management
- User administration
- Groups
- Access control
- Security controls
- Microsoft 365 administration
- Azure concepts
- Cloud security
Status: Planned
Technologies: Cisco, Windows Server, Microsoft 365, Security & Monitoring
A future flagship project combining networking, systems administration, cybersecurity, monitoring, and cloud technologies into an integrated enterprise environment.
The project will demonstrate:
- Enterprise network architecture
- Network segmentation
- Windows infrastructure
- Active Directory
- Network security
- Firewall management
- Endpoint security
- Monitoring
- Cloud integration
- Documentation
- Troubleshooting
- Security controls
Status: Future Project
I am continuously developing practical skills in:
- Enterprise Networking
- Systems Administration
- Cybersecurity
- Network Security
- Cloud Computing
- Microsoft 365 Administration
- Infrastructure Monitoring
- IT Automation
- Technical Documentation
Networking
├── Cisco
├── Cisco Packet Tracer
├── Cisco ASA
├── TCP/IP
├── VLAN
├── Routing & Switching
└── LAN/WAN
Security
├── FortiGate
├── FortiAnalyzer
├── Cisco ASA
├── Kaspersky Endpoint Security
├── Kaspersky Security Center
└── Endpoint Security
Systems
├── Windows 10/11
├── Windows Server
├── Active Directory
├── Microsoft 365
└── Microsoft Azure
Monitoring
└── SolarWinds
Infrastructure
├── CCTV
├── Access Control
├── Wireless Networks
└── Fibre Infrastructure
Virtualization
├── VMware
└── VirtualBox
Automation
└── Microsoft Power Automate
My portfolio is focused on turning theoretical knowledge and professional experience into documented, reproducible technical projects.
Each project will include relevant:
- Architecture diagrams
- Configurations
- Implementation steps
- Testing procedures
- Troubleshooting procedures
- Screenshots
- Results
- Technical documentation
GitHub: Leshoboro-letsie
Location: Lesotho
Computer Systems & Networks Engineer | Networking | Systems Administration | Cybersecurity | IT Infrastructure