Mubarek Mohammed
@mubarekmohammed
Senior System Administrator optimizing servers, networks, and security.
What I'm looking for
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
Senior System Administrator
Buno Bedele Zone Finance
Jan 2018 - Present (7 years 9 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%.
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%.
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.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Job categories
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