TECHNICAL SKILLS:

Hardware / Operating systems: VMware vSphere 6.5, 5.5 (RHEL 7.5, 7.1, 6.10, 6.6, 6.5, 5.9 and CentOS 7.5, 7.4, 6.9, 5.10, 5.5)

HP DL380 G6 (RHEL 6.6, 5.5): Dell 2950/2850/2650/850 (RHEL 5.5, 5u2, 4u2, 3u4)

HP workstation Z600, xt 6200 (RHEL 5.5, 5u2): Sun Blade 100, Ultra 1/2/5/10/30/60, E450, E5500 (Solaris 8, 2.6)

HP Visualize B3600/ B2000 (HP - UX 11): HP 9000/J210XC/J200/C200/C100/712 (HP-UX 10.20)

Methodologies / Techniques: DoD regulations/standards, U.S. Army regulations, CMMI 3, ISO 9000, ISO 20000, Service Oriented Architecture

National Institute of Standards and Technology (NIST) Special Publication Rev 4: Defense Information Systems Agency (DISA) Security Technical Implementation Guides (STIG) Red Hat 6 - Version 1, Release 4

Databases / DB Tools: MySQL, PostgreSQL, Informix, SYBASE

PROFESSIONAL EXPERIENCE:

Confidential, Fairfax, VA

Senior Linux Systems Administrator

• Patches 900+ RHEL 6.10,7.5 and CentOS 6.9, 7.5 physical, virtual, and AWS instances/servers via Spacewalk and Red Hat Satellite server.
• Uses Puppet (5.3.2) and SolarWinds to assist with verification of RPMs, server reboots, application monitoring/troubleshooting.
• Uses Puppet (5.3.2) and Centrify Deployment Manager to change passwords in large scale environment (900+ Linux servers).
• Upgraded Spacewalk application software from 2.5 to 2.6 on CentOS 7.5 Spacewalk application server.
• Installed/configured IBM BigFix on 800+ RHEL 5,6,7 and CentOS 6.9, 7.4 Linux servers.
• Installed/configured Commvault backup client software on CentOS Linux backup servers.
• Creates/modifies/documents procedures (SOPs) using Confluence software.
• Provided Linux system administration support for the Network Management department of the Office of Personnel Management (OPM).
• Primary system administrator for Health Care Data Warehouse (HCDW) system Linux servers hosted on VMware vSphere 5.5 VMs and HP DL380 G6 servers (RHEL 6.6) - maintained disk space, managed user accounts, checked log files, applied security patches.
• Updated HCDW Build documentation with additional system information/instructions/administration routines/configuration file information.
• Resolved outage problems related to Linux based appliances - emergency FSCK, emergency root password change.
• Conducted research/analysis and produced decision paper for electronic FAX upgrade/new install solution.
• Installed Imperva and IBM BigFix on RHEL 6.6 servers.

Confidential, Seabrook, MD

Senior Systems Administrator

• Performed back end application server systems administration support for 460 U.S. Embassy, Consulate, and Mission web sites developed in WebGUI on 10 virtual CentOS 5.10 server instances.
• Documented or contributed to the documentation of new processes/procedures to include: Installing certificates and WordPress.
• Performed Linux system administration for 10 Amazon EC2 virtual test and development instances.
• Installed and configured apache, MySQL, phpMyAdmin, and WordPress on Amazon EC2 virtual test and development instances.
• Provided back end server system administration and application support for web-based applications hosted in a LAMP stack (Linux, Apache, MySQL, PHP) environment hosted on CentOS 5.10 virtual hosts, made configuration file changes, moved files between blogs/servers.
• Performed back end server system administration support for various U.S. Dept. of State blogs to include - install, maintain, and upgrade WordPress.
• Researched and implemented security measures for WordPress based blogs and other WordPress based web applications.
• Reviewed httpd and application log files to verify content processing and to analyze errors.
• Managed/verified/deleted live and expired web site data in Akamai net storage areas.

Confidential

Senior Consultant

• Performed Linux system administration and AWIPS application software administration/integration/installations in support of 4 test bed platforms each consisting of 78 networked RHEL servers/workstations, a NetApp FAS2020 Direct attached storage device, and a Sun StorageTek 5320 network attached storage device. The servers were configured for RAID 1 for server high availability. Heartbeat maintained application software high availability.
• Installed RHEL 5 operating system and AWIPS application software releases on Dell 2950/2850/2650/850 and HP workstation Z600, xt 6200 as required for operating system/application software upgrades and testing.
• Developed/tested/delivered customized installation scripts as required to meet customized AWIPS application and RHEL operating system software release installation specifications.
• Used Serena ChangeMan for CM version control and management of AWIPS software release files and related installation scripts.
• Created/documented detailed test instructions to test solutions to RHEL operating system/AWIPS application software issues.
• Documented new processes/procedures to include (computer hardware replacement/management and Test Bed Scheduler application user's guide).
• Documented procedures in accordance with established requirements contributing to ISO 9000/20000 and CMMI level 3 certifications.
• Analyzed security scans, packaged RHEL RPMs and system configuration file changes into customized releases to neutralize security vulnerabilities.
• Created detailed/customized installation instructions for various installations (Security patch RPM installations and customized AWIPS application software releases) for 166 National Weather Service forecast office AWIPS site platforms.
• AWIPS software releases were delivered on time and resulted in SLAs being exceeded and additional contract option years awarded.

Confidential, VA

Systems Engineer

• Reviewed documentation for accuracy.
• Troubleshot problems resulting from application functionality, network changes, and data corruption.
• Coordinated with CACI software developers and DBA personnel in preparing customized installation procedures/instructions and delivered application software files to configuration management server for installation.
• Installed IBM WebSphere on Sun E450.
• Coordinated and managed requirements with UNIX system administrators and ORACLE data base administrators.
• Helped manage 3 different test bed platform environments (WAWF application software versions, Sun Solaris operating system patches, application servers, database server.

Confidential

Engineer 2 Systems

• Monitored, analyzed, and resolved Legato backup (Legato Networker 6.1) failures for 700+ UNIX based servers/workstations and reduced overall Legato backup failure rate from 4.8% to 1.3% (72.9% improvement).
• Developed and documented Legato troubleshooting procedures for other team members.
• Efforts resulted in no loss of data for 700+ servers/workstations during due to effective and accurate backups.
• Coordinated and led effort to update patches on 64 Sun Solaris 2.6 based workstations/servers.
• UNIX Support Team Point of Contact for TotalNET Advanced Server (TAS) software installs.
• Documented TAS installation/configuration/maintenance procedures in System Administration Manual to meet ISO 9000 standards.
• Jumpstarted, configured, and installed Sun Ultra 10 workstations (Solaris 8, 2.6).
• Installed and configured SunPCi cards, memory, and application software in support of Microsoft Windows functionality for Sun Ultra 10 workstations.
• Resolved Netscape mail 4.7/6.x related issues in support of 1,284 engineering department UNIX users.
• Completed Sun StorEdge Volume Manager Administration class at Columbia, MD Sun training facility 5/31/02.
• Participated in On-Call support rotation for 49 critical UNIX based servers and 206 critical UNIX based client workstations contributing to annual 99.997% overall system availability rating.

Confidential

Senior Technical Specialist

• Installed Sun Solaris 2.6 operating system, installed and configured additional memory, allocated disk space, configured additional external SCSI disk drives, maintained user accounts/home directories, and answered technical questions for Sun Ultra 5 test workstation used for NOAA NEXRAD project.
• Used SunScan to test Sun workstations/servers for Y2K compliancy.
• Installed recommended operating system and Y2K patch clusters on Sun workstations/servers.
• Performed backups on Solaris/SunOS based hosts and used ARCserve to backup Windows 95/98 desktop computers, and Windows NT 4.0 servers.
• Replaced/configured new/defective external SCSI disks for Sun SPARCstation 10, 20 workstations/servers.
• Created, modified, deleted, and maintained user accounts/home directories as required.
• Installed additional memory in Sun SPARCstation 20 servers/workstations.
• Installed Sun Solaris 8, 2.6 operating systems, patches, and upgrades.

Confidential

System Engineer

• Submitted appropriate documentation to register hosts with Army network authority at Fort Huachuca, AZ.
• Created, modified, deleted, and maintained 1,200+ user accounts/home directories.
• Analyzed and rerouted rejected mail for over 1200 user accounts on 56 mail hosts.
• Maintained host files on primary and secondary Domain Name Servers (DNS).
• Identified defective Network Interface Cards using Cabletron hubs.
• Executed and monitored system backups for critical UNIX servers.
• Provided technical support to 50 states and 5 U.S. territories for UNIX mail host problems.
• Replaced defective hardware modules in Cabletron hubs.
• Implemented changes on CISCO 2511 and 7513 routers to restore network connectivity and security.

Confidential

Hardware / Software Engineer

• Provided technical solutions for computer hardware, UNIX/DOS operating system, and configuration issues in support of over 250 worldwide DoD medical installations.
• Developed/documented/implemented technical procedures to efficiently analyze and resolve a variety of computer hardware/software problems.
• Supplied Data General field engineers with critical information that resolved technical hardware/configuration/installation issues.
• Coordinated repair and installation efforts with customers, colleagues and field engineers to insure customer satisfaction.
• Served as lead hardware/software engineer for Data General Aviion 8500 series (DGUX) related technical issues.
• Performed system administration duties for DASH Informix Database Server: managed user accounts/home directories, performed daily Informix database server/database backups.
• Modified backup script to streamline data integrity procedure.
• Played major role in configuration of DASH backup database server: Installed Informix DBMS, configured Informix startup and shutdown scripts for SCO UNIX server, established user accounts/home directories, configured host file.

Confidential

Senior Programmer

• Established, supervised, and participated in 24/7/365 on-call technical support procedures that maintained annual DITDS system availability rate of 97%.
• Communicated directly with users to analyze and resolve system response and software problems.
• Performed technical analysis on site or coordinated by phone with computer operators to resolve problems that included: mail spooling, Networked File Systems not mounting properly, system crashes, printers not printing, and computer system console lockups.
• Created, modified, deleted, and maintained system user accounts/home directories for over 1,100 Defense Intelligence Agency (DIA) users.
• Established permissions, ownership and groups for all accounts while maintaining security access requirements in TS/SCI environment.
• Maintained IP addresses/host names for Sun SPARCstation 5/10/20 workstations/servers in networked client/server configuration.
• Added/modified/deleted/maintained printer entries as required for over 100 remote/networked printers.
• Resolved print problems for remote/networked printers using site unique troubleshooting procedures.
• Used UNIX performance tuning to increase production efficiency to include: moved processes from one networked server to another to load balance, changed process priorities to increase system productivity/response, and scheduled sequence/priority of programs based on user volume and use.
• Maintained Sybase database on DECsystem 5000/240 client/server ULTRIX platform to include: created/modified/deleted/maintained user accounts/home directories, created groups within Sybase database to control access to specific tables in compliance with TS/SCI need-to-know access requirements, and backed up/restored database on an as required basis.
• Directly supervised 2 military IT support personnel: allocated and monitored work flow assignments, wrote annual performance evaluations.
• Supervised 3 joint service military personnel and lead project that established accountability for $1 million of various computer components. Created process/database to maintain inventory in compliance with Inspector General and DoD property accountability requirements/regulations.
• Wrote Statement of Work (SoW) to define scope of duties/responsibilities for contractor support position.
• Served as assistant security officer for 100+ personnel. Briefed personnel on procedures for transporting classified documents, organized and conducted security training for physical security, handling of classified documents, and computer security.