Francis Onojeharho
Raheen Gardens, Dooradoyle,Limerick
Summary
Accomplished IT professional with deep expertise in network administration, cloud computing, and technical support. Highly proficient in Microsoft Azure, Active Directory, and Microsoft 365 administration, with a strong command of PowerShell scripting, firewall configuration, and network security best practices. Skilled in VLAN setup, Ethernet, and wireless networking, ensuring optimal infrastructure performance. Recognised for exceptional customer service, clear communication, and strong team collaboration. Dedicated to using analytical thinking and a deadline-driven approach to drive operational efficiency and support strategic business goals.
Overview
8
8
years of professional experience
11
11
years of post-secondary education
Work history
Level 1 IT Helpdesk Technician
Tierneys Office Automation
Ennis, Ireland
09.2022 - 08.2025
- Providing first-line IT support through ConnectWise / Halo ticketing system, ensuring prompt resolution of hardware, software, and system issues.
- Diagnosing and resolving complex network connectivity problems, including DNS, TCP/IP, and DHCP configurations, ensuring uninterrupted business operations.
- Brandished strong knowledge of LAN and WAN networks, routers and TCP and IP protocols whilst troubleshooting using CompTIA troubleshooting methodology.
- Administering Microsoft Office 365 and SharePoint environments, improving collaboration and user productivity.
- Remotely managing client network devices, such as switches, Firewalls and access points, to restart or configure ports, configure VLANs on ports or set ports to correct existing VLAN.
- Configuring and enforcing security protocols such as multi-factor authentication (MFA), encryption, and access control lists (ACLs) to safeguard data integrity.
- Managing Windows Server environments with expertise in Active Directory, group policy configuration, and user account management.
- Conducting detailed security risk assessments, identifying vulnerabilities, and implementing corrective actions to align with cybersecurity best practices.
- Configured firewalls and maintained intrusion detection systems for improved security measures. VPN setups, etc.
- Creating detailed technical documentation and troubleshooting guides to streamline processes and enhance team knowledge sharing.
- Escalating complex issues to senior support while maintaining clear communication with clients, ensuring continuity of service and rapid resolution.
- Deploying and managing ESXi and other Hyper-V virtualisation solutions to optimise resource utilisation and infrastructure scalability.
- Utilising remote monitoring and management tools for scheduled maintenance, backups, and disaster recovery, ensuring business continuity during upgrades.
IT Support Technician – Remote and Field
El-Alan Construction Company
Lagos, Nigeria
08.2017 - 07.2021
- Delivered comprehensive remote and on-site IT support, resolving escalated hardware and software issues efficiently.
- Troubleshoot advanced networking problems using TCP/IP and DNS protocols to optimise system performance.
- Closed over 50 tickets per week.
- Designed and implemented secure LAN/WAN networks according to industry standards for configurations.
- Managed user accounts in Active Directory, enhancing access management and organisational workflows.
- Applied regular patches to operating systems and third-party software, protecting against vulnerabilities.
- Configured SonicWall firewalls and intrusion detection systems to mitigate security threats.
- Utilised Screen Connect for remote desktop support, addressing software installation and email configuration issues promptly.
- Presented technical solutions clearly, improving user confidence in IT services.
Education
MSc - Network & Information Security
Griffith College Limerick
Ireland 09.2021 - 09.2022
BSc - Computer Science
Benson Idahosa University
Nigeria 07.2013 - 06.2017
Leaving Certificate - Equivalent
Apata Memorial High School
Nigeria 06.2007 - 06.2013
Skills
- Windows server administration
- Interpersonal Skills
- Technical Knowledge
- Security Measures
- Information Security
- Technical Support
- System Monitoring
- Cybersecurity
- Disaster Recovery
- Business Analysis
- Maintenance
- Project Documentation
- Planning
- Processes And Procedures
- Cloud Applications
- Property Management Systems
Personal Information
Title: IT HELPDESK TECHNICIAN
Languages
English
Proficient (C2)
References
References available upon request.
Timeline
Level 1 IT Helpdesk Technician
Tierneys Office Automation
09.2022 - 08.2025
MSc - Network & Information Security
Griffith College Limerick
09.2021 - 09.2022
IT Support Technician – Remote and Field
El-Alan Construction Company
08.2017 - 07.2021
BSc - Computer Science
Benson Idahosa University
07.2013 - 06.2017
Leaving Certificate - Equivalent
Apata Memorial High School
06.2007 - 06.2013
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