TECHNICAL SKILLS:

Server Administration: Redhat Enterprise (RHEL) 4/5/6/7 Fedora, Gentoo, Cent OS, Oracle Linux, Debian, Ubuntu 10/11/12 Solaris, FreeBSD, Windows, Windows 95/98XP/Vista, Windows Server 2000/2003/2012 , OSX HP Proliant, Dell PowerEdge R720/R420, Blade Servers, HP Gen7/Gen8 Blade, Sun RAQ, X Serve, NetAPP FAS2020, 2440, Cisco UCS

Routing, Firewalling, Security & Monitoring Experience: Sonicwall, PFSense, Cisco Catalyst Switches 2600, 7600, 3550, 3750, Nexus, VSG, PIX, ASA 5505, 5512, IP Tables, PF, IPF, IPFW, Barracuda, Snort IDS, Sentarus IDS, Checkpoint, MRTG, Nagios

PROFESSIONAL EXPERIENCE:

Confidential, Chicago, IL

Sr. Unix/Linux Systems Admin

• Building RHEL (Linux) servers using kickstart process getting the kickstart file from the kickstart server.
• Adding Multipath disks for oracle RAC (Real Application Cluster) high - availability and configuring in under configuration file-systems in Linux.
• Co-maintained the Accerciser GNOME ATK accessibility tool.
• Configured System imager for Linux Servers and used it for Cloning, software distribution and OS updates and performed installations using pxeboot, on hundreds of Linux Servers.
• Good working experience with RedHat Satellite Server for upgrading and patching Linux Servers.
• Installed, Configured and maintenance of DNS servers, DHCP Servers, Mail Servers, FTP servers, NIS, Samba and web servers.
• Created LDOMs and Zones for Solaris servers.
• Experience with automation tools like Puppet, SaltStack.
• Develop Devops tools and framework to improve operational efficiency and anomaly detection.
• Installation, configuration and upgrade of Apache, Oracle & IBM Databases on the RHEL Systems manually and also through Puppet.
• Establish and maintain DevOps tools and processes for migrating legacy Microsoft-based applications to modern architecture
• Managing Amazon Web Services like EC2, S3 bucket, RDS, EBS, ELB, Auto-Scaling, AMI, IAM through AWS Console and API Integration with Puppet Code. Recipes and Cookbooks and uploading them to Chef-server.
• Creating load balancer using Ansible to funnel multiple servers and for Auto scaling.
• Ansible and terraform for Route 53 and DNS creation for servers in instances.
• Leverage Ansible for provisioning and de-provisioning user accounts on Linux instances.
• Creating S3 buckets and setting permissions for buckets using Ansible roles and playbooks.
• Involved heavily in setting up the CI/CD pipeline using Jenkins, Maven, Nexus, GitHub, Ansible, Terraform and AWS.
• Experienced in implementing Ansible and Docker.
• Implementing RAID 0, 1, 5and 0+1 levels using Veritas Volume Manager.
• Installed and configured VERITAS Volume Manager (VxVM), Disk and file system management through Veritas Volume Manager, Solaris Volume Manager and Solstice Disk Suite on Solaris and using Logical Volume Manager (LVM) for other flavors of UNIX.
• Planning, documenting and supporting high availability, data replication, business persistence, fail-over, fail-back using Veritas Cluster Server in Solaris, RedHat Cluster Server in Linux and HP Service Guard in HP environment.
• Maintained virtual environments using VMware ESX 6.x Server and built various Linux servers on VMware servers.
• Configure and provide support for VMware, Hyper-V, and NAS systems.
• Enabled SSH keys, SFTP and SUEXEC access for functional accounts on Linux and AIX Servers supporting WebSphere Applications. Hyper-V on Win 2012 Datacenter, P2V, V2V
• Server Build Physical and Virtual (HPE, IBM/Lenovo, Dell).
• Wrote Shell and PL/SQL scripts.
• Administer, maintain and troubleshoot EMC CLARIION arrays by creating volumes, LUNs and implementing different RAID levels. Configured and created snapshots of clones of LUNs using EMC Snap View.
• Involved in large data center migration - planning, designing, moving servers to new data center, coordinating and troubleshooting issues with various data center, network, application and storage teams
• Installation, Configuration and Administration of Web Logic, WebSphere and Apache Servers in Linux and Solaris Servers.
• Maintaining Remedy environments used for the ticketing system.
• Scheduling of automatic repetitive Jobs, and Shell Scripts with Crontab.
• Worked with Linux Schedulers such as Cron Tab, AT.
• Monitoring Virtual memory, Swap management, and Disk and CPU utilization by using various monitoring tools.
• Involved in mass migration of data form old EMC Storage subsystems to new Subsystems.

Confidential, Chicago, IL

Sr. Systems Admin

• Installation, configuration and maintenance of Linux (RHEL) Servers 5.X, 6.X, 7.X
• Configuration of Monitoring Tools and applications such as apache., jboss, weblogic, Oracle DBs with RAC and ASM.
• Installation, configuration and Operating System upgrade on, RedHat Linux 5/6, and Sun Solaris 10/11
• Administrated server consolidation program through use of VMware ESX server and VMware Virtual Center
• SWAP box configuration, Implementation of disaster backup and recovery.
• Performance Management & Tuning of RHEL.
• Veritas File system and Veritas Volume Manager 2.5 are used to configure the RAID 1 and RAID 5 Storage Systems.
• Installed SWM (CI/CD) for building automation deployments for upgrades and installs which was carried out by Jenkins admin and Stash admin.
• Involved in creating Jenkins pipeline jobs for Chef Release process for module deployment, using Kanban AGILE methodology for chef development.
• Created Ansible Playbooks and Chef Manifests to provision Apache Web servers, Tomcat servers, Nginx and other applications.
• Installed and configured SAMBA server for windows and Linux connectivity.
• Installed Web Logic 8.1 with SP5 Server and configured Domains, Admin and managed servers for Applications to be deployed.
• Develop and maintain micro services using Spring, SpringBoot and Kubernetes.
• Worked with completely fair schedukers to maximize CPU utilization by thread affinity.
• Implemented NIS and NFS for administrative and project requirements.
• Installed and Configured Web and investigate the configuration changes in the production environment.
• Responsible for multicasting of various components as a system administrator.
• Worked closely with database administration staff to ensure optimal performance of databases, and maintain development applications and databases
• Tuning the kernel parameters based on the application/database requirement.
• Monitoring system resources, logs, disk usage, scheduling backups and restore
• Set up Quotas for the user accounts & limiting the disk space usage.
• Configuring SUDO and granting root permission to users for performing certain activities.
• Experience in Bash, PL/SQL and Perl scripts for backup and automation.
• Knowledge in Adobe, Hyperion, development servers.
• Upgrading RHEL 5.0 to RHEL 5.5 using live upgrade and manual upgrade.
• Created BASH shell scripts to automate cron jobs and system maintenance. Scheduled cron jobs for job automation.
• Modifying user’s password policies, group policy, UID and GID assignment policies.
• Monitored the performance of the system using top, sar, ps, prstat, vmstat, netstat, iostat, and cpuinfo to check the CPU utilization, bottlenecks of I/O devices,, memory usage and network traffic.
• Troubleshoot network connectivity used ping, netstat, ifconfig, and trace route commands. Login to the remote system using sudo, putty, and telnet. Transfer files across the systems on the network used ftp, scp, and rsync commands.
• Experience managing various file systems using LVM and SVM and also configured filesystems through network using NFS, NAS, SAN methodologies and installed RAID devices.
• Linux technical support and prepared technical documentation for check in verification.
• Regular backing up of critical data and restoring backed up data. Worked in solving tickets issued on day to day activities and problems related to development and test servers.

Confidential, Kingsville, TX

Systems Administrator (Linux)

• KVM Virtualization (libvirt,virsh) Deploying Hypervisors and Setting up Dev and Production VM’s
• OpenStack Administrator Deployment Multi-Tenancy Node Configurations Quantum/Cinder
• Automation / Chef / Spacewalk / Kickstart / PXE
• Writing custom Chef Recipes for managing configurations and dynamic automation processes for production systems and zenoss dev environments
• CentOS 5 / 6 & Ubuntu .10
• LAMP and Monitoring Deployments with Zenoss Product
• Black Duck Server Management
• NetAPP SAN Configurations / iSCSI / NFS / CIFS (Configuring Storage Backend on Hypervisors and Multipathing)
• Networking / Trunking / VLANS / Nic Teaming (Bonding) (Maintaining server network configurations)
• VMWare ESX Cluster / vSphere Client Administration (Administrating VM’s through VSphere Cluster)
• DHCP / BindDNS / Dynamic DNS Zone and Server Administration using Bind / rndc
• Hardware Deployments Dell R720 / iDRAC / Cisco Switches & Firewalls in SunGard Data Center, Physical Access and Installations
• MySQL Replication / Netflix OSS/ Database Server Deployments / Troubleshooting
• Perform Backup and restore. Restored files for end-users when necessary.
• Work on implementation of security controls and monitors compliance with security policies and procedures.
• Experienced in tasks like managing User Accounts and Groups, managing Disks and File Systems
• Experienced in creation and maintenance of user accounts and active directory.
• Perform tasks related to technical support & management.
• Worked on Analyze system performance, client to server traffic and server to server traffic.
• Experience with various ticketing tools and currently using Service Now for everyday support.

Confidential

Linux Network and Systems Administrator

• RHEL 4/5/6 Support
• PLESK 8-10 Support
• Escalation Point on Team for L1 Administrators
• Promotion
• LAMP Stack Upgrades, Support, Troubleshooting
• LVM Configurations, RAID
• Dell OpenManage Configurations
• MySQL 4/5.5 Troubleshooting
• OpenStack Cloud Servers Support/Troubleshooting
• Kernel Upgrades
• Email Services Dovecot / Postfix
• DNS / Firewall IPTables
• Load Balanced F5 Environments
• HA Scalable Hybrid Environments