SUMMARY:

• Technical support background includes troubleshooting and analytical skills on hardware and software.
• Installing, configuring, troubleshooting and upgrading RHEL and Centos 5,6,7.
• Experienced in managing Linux security using Iptables/Firewall & SElinux.
• Interactive installation of Linux OS using automated tools such as PXE Boot, Kickstart, and Ansible .
• Provided users management, such as adding users using system - config-users utility, patching, backups, backups and monitoring.
• Monitoring and supporting of Linux System and processes using tools such TOP, VMSTAT, LSOF, TCPDUMP, NETSTAT, IOTP, IOSTAT, and SAR etc.
• Broad knowledge of filesystem ext2, ext3, ext4 and XFS.
• Shared users accounts using Network Information System (NIS) and Lightweight Directory Access Protocol (LDAP)
• Shared directories and files over a network using Network Files System (NFS) and Samba (SMB).
• Broad understanding of Logical volume manager (LVM) with create, extend, reduce, and delete partitions.
• Managing and upgrading packages using YUM and RPM, and creating YUM repository.
• Set up hardware and software RAID levels to boost performance.
• Experience with using VMware virtualization.
• Experienced in setup and management of ESX virtual hosts and vSphere.
• Manage system networks including setting up IP Subnet and combining network interfaces cards (NIC) bonding.
• Modify Kernel parameters as needed.
• Experience in supporting network and system monitoring tools such as Nagios.
• Experience with AWS cloud platforms EBS, EC2, S3 Bucket, load balancers, Autoscaling, etc.
• Develop automation using Bash scripts.
• Expert in managing and scheduling tasks using Cron Jobs.
• Experience with DevOps tools such as Dockers, and Ansible.

PROFESSIONAL EXPERIENCE:

Confidential, Orangeburg N.Y

Linux System Admin / Engineer

• Built and maintained both Unix and Linux systems to provide critical infrastructure services such as FTP/SFTP, NFS, DNS, SMTP, and Proxy Services.
• Monitored and supported Linux System and processes using tools such TOP, VMSTAT, LSOF, TCPDUMP, NETSTAT, IOTP, IOSTAT, etc.
• Created and extended various kinds of file systems like XFS, Ext3, Ext4.
• Provided system administration support and administer, configure, and troubleshoot RedHat Linux services and workstations.
• Maintained security, backup, and redundancy strategy.
• Supported and implemented security on RHEL using SElinux and iptables.
• Set up hardware and software RAID levels to boost performance.
• Configured and installed various network and security related devices ( e.g. routers, switches, firewall, and load balancers)
• Planned and executed major platform software and operating system, upgrades and maintenance across a highly virtualized environment.
• Implemented automated solutions to perform network installations (Pxe-boot with custom kickstart files) for RHEL (5, 6, 7) and ESXI.
• Problem diagnosis and resolution for applications in VMWARE ESXi/ Linux x86 environment.
• Strongly performed and focused on design, build, deployment, security, system hardening and securing services.
• Creating guest machines, cloning, taking snapshots and adding storage to ESXI servers.
• Worked with Vmotion, Vcentered and converting physical servers to Virtual machines using VMWare tools.
• Utilized EC2 resources to provision servers according to dev team needs.
• Used VPC console to configure load balancer between hosted http websites to improve availability.
• Developing AWS cloud formation templates and setting up Auto scaling for EC2 instances.
• Demonstrated ability in systems management and administration on applying fixes, loading the OS, creating Gold images, resolving system issues, working with vendors to resolve issues.
• Installed, configured and updated packages, patches and applications.
• Interacted with user community through ticketing system.
• Ensured timely resolution of high severity incidents, including communication, reporting and tracking of follow-ups.
• Set up NIS domains, which involve configuring services and client roles.
• Shared directories and files over a network using Network Files System (NFS) and Samba (SMB).
• Managed and upgraded packages using YUM and RPM, and creating YUM repository.
• Writing and editing Bash Scripting to perfume automation of various tasks.
• Managed and scheduled tasks using Cron jobs.
• Monitored system activities such as CPU, memory and disk space to avoid performance issues
• Conducted server management on hardware and software application to insure good working order and survivability.
• Assisted in the daily monitoring of servers/ systems and responding quickly to alerts.
• Developed and drafted inputs to program documentation as it relates to any of the support function.
• Created and maintained detailed up to date technical documentation
• Worked well on collaborative, cross functional team

Confidential, Philadelphia, P.A

Linux System Administrator

• Developed an infrastructure to provide support to all business requirements, and perform regular troubleshoot on system to resolve all issues.
• Monitored everyday systems and evaluated availability of all server resources, and performed all activities for Linux servers.
• Maintained and monitored all patch releases and design various patch installation strategies, and maintained all systems according to NIST standardization.
• Performed daily system monitoring verifying the integrity and availability of all hardware, server resources, systems and key processed, reviewing system and application logs, and verifying completion of scheduled jobs such as backups.
• Maintained all system backup and assisted to restore all procedures, and provide required training to all users.
• Integrated all required software and resolve all issues across various technologies and design require enterprise servers
• Performed common system administration tasks including but not limited to: adding users, configuring volumes, creating filesystems, configuring various system services, and monitoring system health,
• Responsible for the Unix and Linux server administration for all Distribution Electric Center (DECC) servers, and as such, be responsible for ensuring the reliability of all servers and related equipment.
• Installed new software releases and system upgrades.
• Conducted routine hardware and software audits.
• Developed and maintained a comprehensive operating system hardware and software configuration database/library of all supporting documentation .
• Managed incidents to ensure all incidents are reported and documented.
• Managed efficiency in tasks; assisting in clients requests, estimating cost and time.
• Prepared and conducted training programs for application deployments and upgrades.
• Ensured that time frames are met according to all requirements .
• Installed new/rebuild existing servers and configure hardware, peripherals, services, settings, directories, storage, etc. In accordance with standards and project/operational requirements.
• Performed daily backup operations, ensuring all required file systems and system data are successfully backed up to the appropriate media, recovery tapes or disks are created, and media is recycled and sent off site as necessary.