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Senior Linux System Administrator Resume

Washington, DC

SUMMARY:

  • An experienced and responsible Linux System Administrator with a great ability to support data center environment and solve their technical needs, by applying my experience within the areas of system administration and ability to complete deadline driven projects.
  • Extensive experience with Ticketing and Workload Management - IBM Service Now, IPCenter/Ipmon.
  • Experience working with Keynote(Dynatrace) and App Dynamics
  • Custom Hospitality Booking Technologies - Holidex, TPF, Avalon, Gemfire and Dash
  • Extensive experience troubleshooting Linux operating System
  • Experience with F5 Load Balancer and Stingray
  • Experience with administering VMware Infrastructure Client 3.5 and vSphere 5.5. and 6.5
  • Experience in the documentation of key operational processes and SOP’s
  • Enthusiastic team player with professional work ethic, a positive attitude and open to new ideas
  • Excellent organization skills and multitasking abilities

TECHNICAL SKILLS:

Operating Systems: RHEL 4/5/6, CentOS, Fedora

Hardware: HP ProLiant, Blade servers, Dell R320, R410, R420, R510R910, R810, R710, R610 PE 2970,PE 2980, PE M10 Sun T2000, T 20, V490

Software: MS-PROJECT, Linux file system, MS Office, ESX 4.x, 5.x, Tomcat, Web/ Application Server, ApacheServers/Services: NFS, SSH, FTP, Apache, DNS, Nagios, LDAP

VI Editor, gedit, and emac

PROFESSIONAL EXPERIENCE:

Senior Linux System Administrator

Confidential, Washington, DC

  • Install, configure, administer, optimize and support system servers and related components.
  • Analyze, diagnose, troubleshoot and resolve software problems.
  • Highly-skilled knowledge in the documentation of key processes and ensuring systems conform to information security policies, practices, applicable federal mandates, and meets or exceeds business needs.
  • Excellent oral and written communication skills with demonstrated ability to communicate effectively across all organizational teams and with customer.
  • Extensive knowledge in building customized software from source.
  • Documentation and Tracking of issues, logs and audit files.
  • Update server baseline document in line with changes on servers.
  • Installed and implemented new patches to Linux operating system.
  • Installation, configuration and daily Support of Apache Web server.
  • Install. Configure, and administer Oracle WebLogic Server.
  • Deploy applications, create domains and start Oracle WebLogic servers.
  • Monitor domain resources, set up and use node manager, deploy applications, configure database resources and configure clusters of Oracle WebLogic servers.
  • Ensure appropriate security measures are applied using benchmarks and security standards. Remediates compliance issues based on vulnerability, and internal audit reports for the operating system.
  • Plan, install, administer, and apply operating system patches and upgrades on a regular basis for the Red Hat Linux operating systems and other software and custom applications.
  • Participates in technical research and development to enable continuing innovation within the infrastructure.
  • Create, change and delete user accounts upon request.
  • Track, report, support, investigate and troubleshoot server issues.
  • Participates in server disaster recovery testing and upgrades associated with emergency and system exercises.
  • Research configures and implements Personal Identity Verification Single Sign-on smart card/Linux interaction authentication.
  • Configure Netbackup backup software.
  • Implement Linux server replication/synchronization.
  • Update server baseline document in line with changes on servers.
  • Checks alert logs, trace files and file system maintenance.
  • Performed daily system administration activities.
  • Provide afterhours support for critical mission systems
  • Mentor junior staff in understanding emerging technologies and processes
  • Serve as POC for the Linux team in both internal and external communications
  • Research third-party tools and solutions for integration into developmental and operational environments
  • Make recommendations to senior management on fixes for hot-button issues and bottlenecks within the enterprise environment

Linux System Administrator

Confidential - Alpharetta, GA

  • Interact with client to help resolve and troubleshoot their day to day issues.
  • Managed systems routine backup, scheduling jobs, enabling cron jobs, enabling system logging and network logging of servers for maintenance.
  • Performed RPM and YUM package installations, Change Management requests for software releases, patches.
  • Writing and modifying cron and at scheduling jobs through bash scripting.
  • Installed and configured Logical Volume Manager - LVM and RAID
  • Configures DNS, NFS, FTP, Apache, HTTPS, DHCP remote access, and security management
  • Created and maintained user’s accounts, profiles, security, rights disk space and process monitoring.
  • Provided technical support by troubleshooting Day - to-Day issues with various Servers on different platforms.
  • Develop and Maintain documents, library, and procedural documents of the system
  • Management of user accounts, files, and directory permissions, and securing UNIX systems to match industry best practices
  • Provides system administrative support for servers and workstations;
  • Software and hardware upgrades and routine systems maintenance by installing current Patches and Packages;
  • Utilizing SAR, Netstat, Iostat and Vmstat for performance analysis, tuning and capacity planning, problem prevention, detection, and resolution
  • Administers VMware Infrastructure Client 3.5 and vSphere 5.5.
  • Monitor multiple applications via keynote, Dash, App dynamics to help check critical alerts and troubleshoot them.
  • Maintain and support day-to-day data center operations such as Single Sign-On w/LDAP, Active directory.
  • Create and update runbooks
  • Ticketing and Workload Management - IBM Service Now, IPCenter/Ipmon.
  • Load Balancing Technologies - Brocade Riverbed Stingray, F5
  • Custom Hospitality Booking Technologies - Holidex, TPF, Avalon and Gemfire

Linux Administrator

Confidential - Hanover, MD

  • Installs, configures and supports Apache Tomcat on Linux production servers
  • Resolve and troubleshoot problems through log files analysis (JVM logs )
  • Setup and configure LAN and Firewall
  • Ability to work under pressure and within defined processes
  • Experience administering, installing, configuring and maintaining Linux.
  • Experience installing, upgrading, and configuring RedHat Linux 4.x, 5.x, 6.x using Kickstart Servers and Interactive Installation.
  • Responsible for creating and managing user accounts, security, rights, disk space and process monitoring CentOS and RedHat Linux.
  • Installs, upgrades and manages packages via RPM and YUM package management
  • Installs Firmware Upgrades, kernel patches, systems configuration, performance tuning on Unix/Linux systems.
  • Utilizing SAR, Netstat, Iostat and Vmstat for performance analysis, tuning and capacity planning, problem prevention, detection, and resolution.
  • Manages Patches configuration, version control, service pack and reviews connectivity issues regarding security problem.
  • Manages systems routine backup, scheduling jobs and enabling cron jobs.
  • Works with Database administrators to tune kernel for Oracle installations.
  • Ability to communicate technical issues at a level that is easily comprehensible to a variety of audiences

Senior Linux Administrator

Confidential - Hyattsville, MD

  • Created, cloned Linux Virtual Machines, templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts.
  • Installed RedHat Virtualization Linux Service using kickstart.
  • Managed systems routine backup, scheduling jobs, enabling cron jobs, enabling system logging and network logging of servers for maintenance.
  • Performed RPM and YUM package installations, patch and other server management.
  • Installed and configured Logical Volume Manager - LVM and RAID.
  • Configures DNS, NFS, FTP, remote access, and security management
  • Provided 24/7 technical support to Production and development environments Administrated DHCP, DNS, and NFS services in Linux.
  • Create and maintain user's accounts, profiles, security, rights disk space and process monitoring.
  • Provided technical support by troubleshooting Day-to-Day issues with various Servers on different platforms.
  • Develop and Maintain documents, library and procedural documents of the system
  • Management of user accounts, files and directory permissions, and securing UNIX systems to match industry best practices
  • Provides system administrative support for servers and workstations;
  • Software and hardware upgrades and routine systems maintenance by installing current Patches and Packages
  • Utilizing SAR, Netstat, Iostat and Vmstat for performance analysis, tuning and capacity planning, problem prevention, detection, and resolution
  • Administers VMware Infrastructure Client 3.5 and vSphere 5.5

Linux Administrator

Confidential - Laurel, MD

  • Assisted senior-level administrator in various aspects of Linux (RedHat) server administration including installing and maintaining the operating system software, performance monitoring, problem analysis and resolution and production support
  • Disk Management like adding, deleting, and replacing of hot swappable drives on existing servers, partitioning per requirement, creating new file systems
  • Established and maintained user accounts, assigned file permissions and established password and account policies
  • Troubleshoot and resolved basic level system hardware, software and communications problems
  • Performed basic system monitoring, verified the integrity and availability of all hardware, server resources, systems and key processes, reviewed system and application logs, and verified completion
  • Monitored server and application performance &tuned I/O, memory
  • Installation of SSH and configuring of keys base authentication
  • Installation and configuration of MySQL and Apache
  • Performed backup/restore operations using tar, and gzip
  • Maintaining appropriate filesystem security and monitoring status of process in order to increase system efficiency scheduling system related cron jobs.
  • Performed PC support and maintenance
  • Installed and upgraded video cards, modems, hard drives, IDE controllers, SCSI drives, power supplier and memory components.
  • Performed system configuration and troubleshooting.
  • Create and manage user accounts and security

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