Rojelio Villarreal
Senior Linux System Administrator at The Goal- Claim this Profile
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English -
Topline Score
Bio
Credentials
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CompTia Security+ 2017
CompTIADec, 2017- Oct, 2024
Experience
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The Goal
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United States
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IT Services and IT Consulting
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1 - 100 Employee
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Senior Linux System Administrator
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Apr 2018 - Present
Root Cause Analysis of system failures or abnormalities. Providing recommendations for improvements and reporting to IS Tech managers and ERP Service Managers on causes, resolutions of failures or abnormalities. Perform security SCAP and SITG remediation of systems as needed. Support of SELINUX Security making modifications as needed. Perform monthly patching of OEL 6 & 7 Perform new system OEL 7 builds from template utilizing VCenter 6.7. Utilizing Ansible to currently monitor and maintain for 190 systems. Extrapolate raw data from systems converting to CSV data for reporting using Perl, AWK, SED, Bash Scripts. Active Secret Clearance
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WINTEL MANAGER AT ALTESS
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Feb 2015 - Apr 2018
Wintel Manager/Administrator for Windows and VMware Wintel Manager for team of 8 Wintel Systems Administrators. Responsible for the daily administration of Windows 2008 R2 domains comprised of 500 servers in a single Forest comprised of 5 domains.Responsible for VMware vSphere 5 Clusters utilized for Citrix, SQL, and Linux and Application servers.Provide regular status and progress of remediation of Security vulnerabilities of Wintel systems reports to Security Team, Upper Management and Government Entities (ALTESS, U.S Army)Provide Inventory and status of servers.Make recommendations and infrastructure changes through controlled procedures. E.g. Provided Planning for migration from 2008 R2 to 2012 R2.Provision day-to-day support SAP and Oracle Database administrators.Provision day-to-day support to Citrix Application Support administratorsPeople Manager for 17 CRSA employeesHiring Manager for CSRA Technology Systems Services Group Windows PowerShell script development
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CSC
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United States
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Information Technology & Services
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700 & Above Employee
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Sr. Lead Unix Administrator
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Sep 2006 - Mar 2015
Netbackup Administrator 7.6 overseeing 4 backup environments day-to-day operations. In conjunction with CA Unicenter Autosys job manager. Responsible for creating and maintain documentations of backup environments, polices and schedules. Provide in house train to peers in Netbackup operations and usage. SAP, Oracle and VMware backups, including shadow image backup experience. SAP HANA backup Integration with Netbackup. DR readiness planning and implementation.Senior Unix/Solaris Administrator of Sun and Linux (RedHat, SUSE) Systems.Provide system support of hardware and operations, trouble shooting system failures, live update. Servers & Storage include but not limit to M6/5, T5/4, M8000, M5000, M4000, and 5220. Hitachi USP-V and HUS series San storage plus AMS 1000 & 500 series SAN storage.Hitachi Replication (shadow Image support), Device manager and tuning manager. Command Suite 7 and Storage navigator.Maintain Firmware, Zones and perform health checks on Brocade Director Class 8510, 48000, and 5000 series SAN switches.Complied Migration plan for deployment of Brocade DCX 8510 from older director 48000 series switches in production.Tape Library support Sun SL150 and L500.
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BAE Systems
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United Kingdom
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Defense and Space Manufacturing
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700 & Above Employee
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UNIX Administrator
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Jan 2006 - Sep 2006
Unix Administration and Backup Administration Unix Administration and Backup Administration
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Systems Manager
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Apr 1996 - Jan 2006
UNIX administration UNIX administration
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Education
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1989 - 1994
University of Maryland Global Campus
BA, CMIS
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