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Mubarek Mohammed

@mubarekmohammed

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Senior System Administrator optimizing servers, networks, and security.

Ethiopia

Message

What I'm looking for

I seek a hands-on infrastructure role where I can improve uptime, implement secure cloud and virtualization solutions, mentor teams, and drive automation to reduce costs and accelerate incident response.

I am a Senior System Administrator with over seven years managing enterprise IT infrastructures across Windows and Linux environments, virtualization platforms, and network security. I focus on delivering reliable, scalable solutions that reduce downtime and lower costs.

I have led migrations to Microsoft 365, configured and optimized VMware ESXi clusters, and implemented Active Directory and Group Policy for large user bases, achieving measurable improvements such as 99.9% email uptime and a 30% reduction in downtime incidents.

I design disaster recovery plans, deploy centralized logging (ELK) for faster incident detection, mentor junior staff, and embrace automation and monitoring (Ansible, PowerShell, Nagios/Zabbix) to strengthen security and operational efficiency.

Experience

Work history, roles, and key accomplishments

Current

Senior System Administrator

Current

Buno Bedele Zone Finance

Jan 2018 - Present (8 years 5 months)

Managed and secured 200+ Windows/Linux servers and implemented AD for 1,500+ users, reducing downtime by 30% and standardizing access control; led migration to Microsoft 365 cutting costs 20% and improving email uptime to 99.9%.

Windows Server Linux Active Directory VMware ESXi Ansible PowerShell

Network Administrator

Buno Bedele Zone Finance

Jan 2015 - Jan 2018 (3 years)

Administered network infrastructure of 50+ switches, routers and firewalls, implemented VLANs and VPNs to improve security and raised network availability to 99.8%, reducing unauthorized access attempts by 35%.

Switching Routing VLAN VPN Firewalls Troubleshooting Mentoring

Education

Degrees, certifications, and relevant coursework

Mattu University

Master of Science, Computer Science

Completed a Master of Science in Computer Science at Mattu University focusing on advanced computing topics and systems administration.

Jimma University

Bachelor of Science, Information Technology

Completed a Bachelor of Science in Information Technology at Jimma University with emphasis on networking, system administration, and IT fundamentals.