TECHNICAL SKILLS

Operating System: Red Hat 6/7, Windows (7, 10)

Hardware: Dell (Power Edge, Cisco and HP (ProLiant)

Networking: TCP/IP, NFS, DNS, FTP/SFTP.DHCP, PROXY

RDBMS: Oracle 10 11g, and MS SQL Databases

Storage: LVM, NFS, RAID 0/1/5, ext, xfs file system

Working Environment: Virtualization, Cloud and Physical Environment.

Languages: Bash

Tools: Vmware ESXi, Active Directory, Nagios Cacti, Splunk. Remedy and TracIT.

PROFESSIONAL EXPERIENCE

Linux System Administrator

Confidential, Herndon, VA

Responsibilities:

• Supporting 1000+ Linux servers on physical, virtual and cloud environment.
• Performing of general system administration, monitoring and maintenance of day - to-day operations.
• Wrote bash script to monitor services and other important processes.
• Installed, configure, monitor and maintain applications and databases on Linux servers to ensure maximum availability.
• Diagnose complex customer emails issues and provide quick and accurate solutions wifin a collaborative team. Worked wif NOC and SOC to resolve server related and customers' issues.
• Maintain data files and monitor system configuration to ensure data and system integrity.
• Resolving of rDNS for Mediacom clients.
• Install, configure and maintain applications like nginx, apache, nexpose scan.
• Networking monitoring, analyzing, troubleshooting.
• Participate in the deployment of Splunk infrastructure for data analysis and reporting.
• Perform system upgrades, patches installation via Redhat Satellite and on CLI using yum and rpm, quarterly and as needed.
• Plan, document, review and maintain system administration guidelines and policies.
• Rotating on call pager responsibilities for Production environment.
• Deployment and configuration of new virtual machine on Vmware ESXi and registered them wif Redhat Satellite.
• Implement and maintain services running on Linux server and AWS instances
• Working experience of LDAP and Duo authentication environment.
• Security and compliance to maintain security standards including patches, fixes. Kernel tuning and optimizations.
• System and application monitoring utilizing the Nagios monitoring software.
• Good noledge of SQL language, MySQL and Oracle databases in server administration and installation.
• Coordinate wif application vendors for upgrades, enhancements, and technical support as required.
• Participate in capacity planning, disk expansion wif LVM and memory management.
• Support development, test and production environments.
• Working noledge of automation Configuration Management tools such as Ansible and working Knowledge of AWS.

Linux System Administrator

Confidential

Responsibilities:

• Installing and configure Apache and support them on Linux servers.
• Conduct compliance scans wif ACAS to identify security issues and patch compliance process, any security policy changes as needed per STIG compliance.
• RPM and YUM package installations, patch and upgrading as per policy
• Provided access control list (ACL) implementation wif customize permissions to users.
• Set up user and group IDs, password settings and resolving of permissions issues.
• Performing of daily task such responding to emails, troubleshooting of end-users problems on Linux servers.
• Security configuration and hardening of Linux server SElinux, iptables, firewall, disable USB use and SUDO privileges.
• Perform file management, system troubleshooting and ticket resolution.
• Configuring and managing networking to avoid single point of a failure applications thus providing high availability and network load balancing.
• Designed firewall rules for new servers to enable communication wif application.
• Files transfers across vary platforms and servers wif NFS, SCP and FTP.
• Managing system jobs scheduling like disabling and enabling cron jobs.
• Backup and restore using native tools like tar, dump, rsync and cpio as per SLA
• Monitoring system activities like CPU, memory, Disk space to avoid any performance issues.
• Managing of system log files and configuration of rsyslog.
• Performing of disk space and LVM.
• Monitoring of disk space and system activities for performance tuning

Linux Redhat System Administrator

Confidential

Responsibilities:

• Monitor and check the performance and functionality of the operating system.
• Installed and maintained Apache web and database servers
• Performed Hardware maintenance.
• Schedule backup of files and Directories to ensure all required file systems are in place wif native tools like tar, cpio and dump.
• Daily check of error messages wif resolution and timely responding of emails
• Performed routine checks on the Red Hat Linux servers of the company.
• Participated in building of Linux servers to transition all medical records to electronic system.
• Provided 24x7 System Administration support for Red Hat Linux servers and resolved troubled tickets.
• Performed security checks and management on filesystem and directories.
• Performed User's account management.
• Monitored servers and Linux scripts regularly and perform troubleshooting.
• Created disks space for database installation and management.
• Configured and managed disk space and LVM on Red Hat and CentOS using tools native tools.

Windows Administrator

Confidential, Baltimore

Responsibilities:

• Apply patches to stay current. Implement and maintain security policies and procedures.
• Ensured 99.9% uptime of production environment.
• Coordinated routine server maintenance and implement server infrastructure changes as needed.
• Performed daily system administration activities; checking system logs, troubleshooting, and other system resource usages.
• Provided support for assigned applications, including setup of new users, password resets, and basic troubleshooting of application issues.
• Evaluated, escalated and coordinated resolution of environment-related issues wif appropriate personnel.
• Served as a subject matter expert for functionality wifin assigned applications, and stayed current on new and upcoming enhancements wifin assigned applications.
• Answered questions from end users and provides basic training to new users as needed.