Alex Adejuwon
Olowora, Isheri, Berger
Summary
Adaptable System Administrator focused on delivering high-quality technical support and effective incident management. Demonstrated ability to enhance system reliability and performance while ensuring customer satisfaction through innovative problem-solving and collaboration.
Overview
7
7
years of professional experience
1
1
Certification
Work History
System/Server Administrator
United Bank for Africa
Lagos
04.2025 - Current
- Managed server infrastructure for banking applications and services.
- Developed and implemented backup strategies, enhancing data integrity and availability.
- Collaborated with IT teams to troubleshoot server issues effectively.
- Leverage advanced VMware features such as vMotion, High Availability (HA), and Distributed Resource Scheduler (DRS) to enhance workload balancing and fault tolerance.
- Administer and optimize enterprise Windows Server (2016/2019/2022) and Linux Red Hat, ensuring high availability, performance, and security of critical business applications.
- Execute proactive patch management, system updates, and security hardening, maintaining compliance with organizational and industry standards.
- Administer and support Huawei FusionCompute and enterprise storage platforms, including Dell EMC (VMAX, PowerMax, PowerStore) and Huawei storage solutions.
- Perform storage provisioning, LUN management, and capacity planning, aligning storage performance with application and business requirements.
- Support and maintain high-availability clustering solutions, including Windows Server Failover Clustering and Linux HA clusters, to ensure business continuity.
- Apply knowledge of Dell PowerFlex (software-defined infrastructure) and Huawei CI & backup storage systems to support modern, scalable, and software-defined data center architectures.
- Automate infrastructure operations using tools such as PowerShell, Ansible, and VMware vRealize Orchestrator, improving efficiency and reducing manual intervention.
- Collaborate with cross-functional teams to support infrastructure design, deployment, and continuous improvement initiatives.
- Design and implement VM configurations, virtual networking, and storage policies to support scalable and resilient workloads.
- Troubleshoot and resolve complex infrastructure issues across Wintel, Linux, virtualization, and storage layers, minimizing downtime and improving system reliability.
- Manage and optimize virtualization platforms, including VMware vSphere (ESXi, vCenter), ensuring efficient resource utilization and high system performance.
- Planned, tested and supported high-availability infrastructures.
- Increased system security and performance with proactive changes.
- Resolved after-hours and weekend emergencies efficiently while maintaining a flexible schedule.
- Consulted users to determine areas in need of improvement.
- Provided on-call support during holidays and weekends to ensure swift resolution of system emergencies.
Enterprise Messaging & Collaboration Service Admin
United Bank for Africa
Lagos
01.2023 - 03.2025
- Configured and deployed M365 workloads to facilitate seamless migration and enhance user experience.
- Administered M365 workloads to ensure optimal performance.
- Managed Active Directory, DNS, DHCP, and group policies in Windows environments.
- Utilized Azure AD Connect for M365 and Azure identity integration.
- Oversaw SQL database management for on-prem applications (UPM and SharePoint).
- Monitored system metrics including disk space, transaction logs, CPU, and memory utilization.
- Migrated and configured Exchange servers, ensuring comprehensive technical documentation for future reference.
- Evaluated customer requests to deliver timely assistance.
- Assisted customers by addressing requests and inquiries, contributing to increased satisfaction levels.
- Conducted comprehensive research and data analysis to support strategic planning and informed decision-making.
- Utilized advanced technical skills and expertise to troubleshoot complex problems and implement solutions.
IT REGIONAL SUPPORT
United Bank for Africa
Lagos
09.2019 - 12.2022
- Executed daily IT support tasks with accuracy, contributing to seamless operations.
- Provided first-level support for network-related issues and e-channels, including POS and ATM.
- Diagnosed and resolved hardware and software problems for end users.
- Delivered timely resolution of IT application-related issues.
- Monitored IT systems to ensure operational efficiency, safety, and data security.
- Spearheaded installation of over 250 desktops during bank-wide upgrade.
- Implemented innovative connectivity network configurations, enhancing overall capabilities by 15%.
- Contributed to bank-wide IT projects and deployments, ensuring timely execution and alignment with business goals.
- Conducted system analysis and testing to identify and resolve technical issues or inefficiencies.
- Achieved cost-savings by developing functional solutions to problems.
- Leveraged technical skills to troubleshoot complex issues, resulting in effective solutions for end users.
- Recognized by management for providing exceptional customer service.
- Exceeded customer satisfaction by finding creative solutions to problems.
- Developed online FAQ articles, reducing average ticket volume by 39%.
Education
Bachelor of Science - Public Health
National Open University
Lagos, Nigeria04-2026
Bachelor of Science - Computer Science
Bestower University
Cotonou, Benin09-2023
Skills
- Systems administration
- Server management
- Linux administration
- Virtualization management
- Cloud technologies
- Active directory
- Email administration
- Network troubleshooting
- Server monitoring
- Patch management
- ITIL framework
- Technical support
- Incident management
- Data analysis
- Technical documentation
- Collaboration tools
- Customer service
- Interpersonal and written communication
Certification
Az-900: Microsoft Azure Fundamentals.
Accomplishments
DevOps Industrial Training iBT Learning.
Timeline
System/Server Administrator
United Bank for Africa
04.2025 - Current
Enterprise Messaging & Collaboration Service Admin
United Bank for Africa
01.2023 - 03.2025
IT REGIONAL SUPPORT
United Bank for Africa
09.2019 - 12.2022
Bachelor of Science - Public Health
National Open University
Bachelor of Science - Computer Science
Bestower University