08/28/2026 updated
100 % available
Senior Cybersecurity and IT Infrastructure Engineer
Busia, Kenya
Worldwide
Bachelor of Science in Information Sciences (IT Major)About me
Certified Senior Cybersecurity and IT Infrastructure Engineer with 5+ years of experience in network architecture, cloud infrastructure, cybersecurity, systems administration, and enterprise support. Skilled in securing, optimizing, and managing high-availability IT environments.
Data AnalysisTechnical SupportHTML5VoIPCisco Certified Internetwork ExpertCisco Certified Internetwork Expert Security (CCIE Security)Network AnalysisCisco PIXCisco HardwaresCisco IOSCisco RoutersCisco Systems VPN ClientCustomer Communications ManagementLinuxIBM Systems Network Architecture
Network Design and Architecture
Expertise in designing and implementing enterprise network architectures including LAN, WAN, SD-WAN, and MPLS environments. Proficiency with routing and switching technologies from vendors such as Cisco, Juniper, Fortinet, Mikrotik, and Huawei, as well as load balancers and VPN solutions.
Cybersecurity Operations
Comprehensive knowledge in ethical hacking, penetration testing, threat detection, endpoint security, and vulnerability management using tools such as Nessus, OpenVAS, Metasploit, Burp Suite, and SIEM platforms. Skilled in incident response, cybersecurity defense analysis, and proactive risk mitigation.
Cloud and Virtualization
Hands-on experience with cloud platforms including AWS, Azure, and VMware, as well as VPS environments. Capable of architecting and managing cloud infrastructure to support high-availability enterprise technology environments.
Security Automation and Monitoring
Proficiency with monitoring and security tools including SolarWinds, LibreNMS, Nagios, Meraki Dashboard, Sophos, Wireshark, Splunk, CrowdStrike Falcon, SentinelOne, Qualys, Snort, Suricata, and ConnectAll for proactive network and security monitoring.
VoIP and SIP Migration
Experience modernizing communication infrastructure through VoIP and SIP migrations, including 3CX &IP Phones deployments across 200+ endpoints, maintaining high availability and performance.
Systems Administration and Platforms
Administration of Linux, Windows Server, Cisco IOS, macOS, Microsoft 365, and Microsoft Dynamics 365 environments, including Active Directory, DNS, and enterprise network services management.
IT Infrastructure Planning and Deployment
Planning and deploying enterprise IT infrastructure across multi-vendor ecosystems, including SD-WAN implementations across 200+ sites while maintaining 99% SLA compliance.
Vulnerability Assessment and Risk Mitigation
Conducting vulnerability assessments and implementing risk mitigation strategies using industry-standard tools and frameworks to protect critical organizational assets.
FTTH/FTTB and OTDR Testing
Proficiency in fiber optic network technologies including FTTH and FTTB deployments, as well as OTDR testing for network diagnostics and fault identification.
CCTV Installation and Monitoring
Installation and maintenance of CCTV camera systems and NVR equipment for enterprise and residential environments, including projects for Mountain View Estate Residents Association and Rummage and Run Limited.
Customer Support Systems
Experience with customer support platforms including Zoho Desk, ZenDesk, Jira, Avanti OSS, and ConnexOne for managing support tickets and client relationships.
Business Continuity and Disaster Recovery
Knowledge and application of business continuity planning and disaster recovery strategies to ensure operational resilience and minimize downtime in enterprise environments.
Experience
Professional experience5 - 10 years
Freelancer since2018
Languages
EnglishFluentFrenchBasic knowledge
Project history
Systems administration for Mountain View Estate Residents Association, including management of IT systems and infrastructure.
Managed Microsoft 365, Active Directory, DNS, and enterprise network services. Configured and supported Cisco Meraki and Fortinet SD-WAN across 200+ sites maintaining 99% SLA. Led L2/L3 support for VPN, VoIP, and Wi-Fi and performed Root Cause Analysis. Conducted proactive threat detection and incident response for DIA/MPLS links. Provided 24/7 on-call support and Microsoft 365 email management. Handled 80+ monthly support tickets ensuring 99% SLA compliance and proactive network monitoring. Managed client relationships.
Oversaw critical IT infrastructure, server security, and logistics system integration.