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Jefferson A. — Senior System Administrator from Philippines

Jefferson A.

Senior System Administrator

Philippines 1-2 years
Open to offersNew to Platform
Languages
EnglishTagalog
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About

Jefferson A. is an experienced System Administrator with over 15 years in the IT industry, specializing in server management, network administration, and security protocols. At Veritech Corporation, he plays a critical role in maintaining system integrity, conducting comprehensive VeriSMART diagnostics, and managing servers, including the renewal of SSL certificates and Active Directory configurations. In his previous tenure with Yamaha Motor Philippines Inc., Jefferson implemented virtualization strategies using NUTANIX and VMWARE and enhanced operational efficiency through automation using scripting tools like PowerShell. His extensive knowledge in system health monitoring and disaster recovery ensures robust and reliable IT infrastructures. Jefferson's educational foundation is a Bachelor of Science in Information Technology from AMA Computer College, further complemented by professional training in Windows Server administration and AD Manager Plus.

Experience

  • Windows Server Admin

    Veritech Corporation · 2025 — Present
    Conducted VeriSMART Checks as per schedules, including checks on Server Hardware, Windows Server Updates, Domain Controllers, Exchange Servers, File Servers, Server Security, SQL Servers, and Host Servers. Managed SSL Certificate renewals, user and group management in Active Directory, and addressed system outages and high-priority incidents. Provided basic Desktop and end-user support while using ConnectWise tools for issue resolution and performing basic Network troubleshooting. Set up File and folder permissions and analyzed logs to identify server issues. Maintained Active Directory configurations, resolved Group Policy issues, and managed Hyper-V environments. Diagnosed Windows Server performance issues and updated Server Applications, keeping knowledge base articles current. Logged and resolved IT issues through the Jim2 Ticketing System and escalated complex problems when necessary. Actively identified and reported potential security vulnerabilities and assisted with cyber-security incidents.
  • System Administrator

    Yamaha Motor Philippines Inc. · 2010 — 2025
    Oversaw the management of servers including DC, DHCP, and FILE SERVER while actively monitoring server and network health using ZABBIX and XYMON tools. Optimized server performance by tuning configurations and implementing updates regularly. Developed virtualization strategies using NUTANIX and VMWARE and resolved technical issues related to internet connectivity, email clients, and IP Telephony. Collaborated with third-party providers for immediate issue resolution and maintained system stability through software updates via WSUS. Increased operational efficiency by automating tasks with PowerShell and custom scripts. Managed data backups and disaster recovery processes with COMMVAULT, contributing to business continuity. Supported end-users through phone and remote assistance, fulfilling requests through the ServiceDesk Plus system and configuring IT hardware and software. Participated in preventive maintenance and repair activities as part of the IT team.
  • Planning Staff

    MM Steel Service Center Corporation · 2009 — 2010
    Encoded cut-off steel produced by the production team and organized office operations by maintaining job sheet records and filing systems.
  • Warehouse Clerk

    AMHERST Laboratories Inc. · 2008 — 2009
    Encoded information for finished goods products scheduled for delivery and ensured documentation accuracy to mitigate processing errors. Operated pallet jacks for loading and unloading finished goods from trucks and containers.

Skills & Expertise

Education

  • Bachelor of Science in Information Technology
    AMA Computer College · 2004 — 2008
  • High School Graduate
    Laguna College of Business and Arts · 2000 — 2004