Linux Administrator Resume

SUMMARY

Systems administrator with five years of extensive expertise in of Linux OS administration and platforms. Specialize in monitoring, troubleshooting, and configuration. Proactive and knowledgeable in regard to industry technology.

PROFESSIONAL EXPERIENCE

Linux Administrator

Confidential

Responsibilities:

Install and configure CentOS 6 and CentOS 7 and setting up CentOS repositories.
Implement, install, configure and perform administration of RHEL/CentOS servers.
Perform Logical Volume Management of the filesystems and CPU load for optimal performance.
Perform User Administration, permitting and modifying user ownership or permissions as well as off - boarding and on-boarding user accounts, password setup, and password expiration.
Install, maintain and configure VMware infrastructure (ESXi).
Configure and harden network and host-based firewall on systems, allowing for increased security.
Install, configure, maintain, and monitor DHCP, DNS, Apache, SMTP, and file servers on linux servers.
Create shell scripts and cron jobs to automate system processes.
Troubleshoot Linux networks, security related issues, and capturing packets using tools such as IPtables, firewall, TCP and UDP Protocols.
Utilize Nagios to monitor system notifications, resources, logs, disk usage, backups, and restorations.
Apply system and operating system patching, as necessary.
Manage help desk operations staff to provide assistance to end-users.
Provide troubleshooting and problem resolution.
Participate in all phases of project delivery, including design, development, test automation, release and deployment.
Create and update shell scripts and cron jobs to automate system processes.
Document all modifications and enhancements to existing software and supporting systems.
Diagnose and troubleshoot Linux operating system’s processing problems
Ensure network, system, data availability and system integrity are met through preventative maintenance, monitoring and upgrades.
Utilize ticketing system to track progress and status of projects while providing end user support.
Leverage current services and research new services to maximize productivity.
Monitor the current Linux and VMW environment.
Maintain and update documentation of infrastructure, systems, and processes.

Jr. Linux Administrator

Confidential

Responsibilities:

Demonstrated hands-on experience in implementing best practices, including infrastructure hardening, and centralized logging using various applications and server systems.
Maintained network performance by performing network monitoring and analysis, and performance tuning.
Secured network by developing network access, monitoring, control, and evaluation.
Administered installations, patches, and upgrades on existing and newly added systems.
Installed new and existing servers and configured hardware, services, settings, directories, and storage in accordance with project requirements.
Performed user administration, allowing and changing of user ownership or permissions as well as off-boarding and on-boarding user accounts, password setup, and expiry.
Performed system monitoring with Nagios, as necessary.
Document all modifications and enhancements to existing software and supporting systems.
Performed regularly scheduled security monitoring to identify possible security threats that may have been by-passed through the network.
Created and updated shell scripts and cron jobs to automate system processes.
Repaired and recovered from hardware or software failures and documented resolutions.
Configured and hardened network and host-based firewall on systems, allowing for increased security.
Troubleshooted Linux network, security related issues, capturing packets using tools such as IPtables, firewall, TCP and UDP Protocols.

Jr. Linux Administrator

Confidential

Responsibilities:

Implemented company policies, technical procedures and standards for preserving the integrity and security of data, reports and access.
Diagnosed and troubleshooted Linux operating systems processing problems
Applied solutions to identified system problems to increase company efficiency.
Ensured network, system and data availability and integrity through preventative maintenance and upgrades.
Built application platform foundation which supported migration from client-server product lines to enterprise architectures and services.
Designed framework for component development practices to support future projects.
Trained and enlightened other junior members of IT team regarding network security and troubleshooting of data circuits.
Advocated for back end-users to perform testing and problem analysis for server, desktop and IT infrastructure work.
Researched new tools and technologies that could be used by the quality assurance team.
Provided continued maintenance and development of bug fixes and patch sets for existing applications.

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