SUMMARY:

Near 20 years of experience in Unix/Linux/Solaris/AIX Administration, build and release management. Hands - on experience in designing, configuring, and managing high Availability clusters (SUN, VERITAS and HACMP). Excellent shell programming ability. Solid experience in hardware installation/maintenance, software integration, packaging, quality assurance and testing, TCP/IP network administration and web administration. Expertise in capacity planning, performance analysis, kernel tuning, troubleshooting, and debugging of OS related problem.

TECHNICAL SKILLS:

Hardware: Sun Ultra Enterprise E10k, E6800, E6500, E6900, E280R, E450, Sun Fire 12k/15k, V 240/440/480/490/ X4100/X4200, Sun T1000/T2000, T5220/T5240, M4000/M5000, M10, Confidential System X series, P series and I series, DELL 1950/2650/2850/6850 SCSI, Fiber Interfaces.

OS: Sun Solaris 8/9/10/11, RHEL 5/6, AIX 6/7, Windows 2000/2003, VMWare ESX Server.

Software: Sun Solaris Custom Jumpstart, Linux Kickstart, NIS, NFS, Auto mounter, DNS, DHCP, TCP/IP, Sun Cluster, VERITAS Volume Manager, VERITAS Cluster server, VERITAS NetBackup, Confidential HACMP, Oracle, Apache, DB2, SAP, SSH, Samba, FTP, LVM, RPM, YUM

Languages: C, SQL, Shell scripting (bash, csh and ksh), Perl, Cobol, RPG, Fortran, Java

PROFESSIONAL EXPERIENCE:

Confidential

LINUX system engineer

Responsibilities:

• Worked on 100+ Linux Servers which host SAP/DB2 applications for Confidential Financial systems.
• Provided services for supporting day to day operations, patching, change and service requests.
• Designed, configured and maintained the Veritas Cluster Service for all SAP and DB2 applications on all pre-production and production servers.
• Manage the backup of the Linux Servers and SAP/DB2 application data
• Managed the storage usage, adding volumes and creating new file systems …
• Managed user security, adding new users and deleting old users
• Implemented Linux monitoring in various application models. Gathered statistics of response times/average application performances error rates using dashboard.
• Proficient in system performance tuning
• Configured and maintained Single user sign on systems

Confidential

Linux/AIX/SAP Team Lead

Responsibilities:

• Exemplified keen expertise in Confidential server building using Confidential virtualization tools LPAR and Linux servers with Jumpstart/kickstart, Linux release management, installation and configuration of Red Hat 6 Servers using cobbler.
• Experience in Confidential Virtualization implementations such as LPAR
• Configuring and maintaining virtual server environment using VMWARE ESX, VCenter VSphere
• Managed the build and support of 50+ Confidential production systems and managed diverse teams consisting of off-shore developers and operators, and US-based development and support teams, including customer service groups to solve production incidents and provide prompt restoration of service to customers facing back-end systems.
• Accomplished tasks including building, maintaining and monitoring of infrastructure build servers and making sure of the availability of accurate release levels of software, backups, and monitoring for the well-being of the system for SAP/Oracle applications.
• Kernel configuration on the operating system for optimum performance.
• Maintaining servers already installed and setup with custom builds and applications on their networks.
• Performing updates and upgrades on the systems currently on the network for performance and auditing purposes.
• Troubleshooting and Trouble Analysis of operating systems with signs of degradation in resources and performance.
• Managed the DR test for the infrastructure and verified DR system is functioning properly.
• Storage Provisioning, Volume and File System Management using LVM/Veritas on Linux/AIX OS in a SAN environment.
• Clustering solutions for High Availability using Confidential Cluster HACMP for Oracle database.
• Configuring network services such as DNS/NFS/NIS/NTP for AIX/Linux Servers.
• Setting up AIX/Linux environments for various applications.
• Instrumented shell scripts for day-to-day tasks.
• Troubleshooting issues, developing procedures and performing change management.
• Worked with Application team and Network teams to identify the required Public IP and DNS changes for the functionality of application and Clustering software
• Works on creating and implementing application monitoring and logging strategies.
• Worked on the All International Application Portfolio and Center Accounting Finance system (Atlas) based on Oracle E-Business suite for moving server and taking backups, doing sanity reboots and automates tasks required during the server move.
• Worked with Data Center team, Network teams and Storage teams for troubleshooting the issues during the moves and fixed them and handover servers to application teams for application testing.
• Managed system configuration and maintenance, problem troubleshooting, system and program security, applications and program management, planning and directing upgrades and testing to ensure system functionality.
• Worked as System engineer with EMC to help in moving the SAN and NAS storage on servers across the Datacenter and Luns Remapping on new storage and trouble shoot the issues.
• Installed NetBackup backup client agents and configure backup software for daily backup jobs
• Troubleshot complex Network/firewall/Load balancers, storage & all kinds of issues for production support.
• Analyzing, troubleshooting and resolving problems involving OS/Application/Web site issues & configuring the Apache, Portal, SAP and Oracle database and production servers.

Confidential

Sr. Solaris/Linux admin consultant

Responsibilities:

• Responsible for providing Technical Support on LINUX and Solaris platform for various clients.
• Involved in System Administration tasks on Solaris/Linux/NAS infrastructure running real time Oracle Databases and SAP applications
• Performed Problem Management and Change Management on LINUX and Solaris systems.
• Installed and configured Red hat Linux and Solaris 8/9 on various systems for clients Production purpose. Patching them according to oracle standards and kernel upgrades as recommended by the SAP basis and dba’s for their applications.
• Client management like understanding and implementing required changes and new requirements on all systems located in data center.
• Storage allocation tasks include, deployment of a new host, resizing and creating exports entries.
• Architecting VERITAS snap backup solutions. This involves creation and configuration of snap volumes database cold and hot backups.
• Designed and deployed Solaris Cluster Environment using Sun Cluster Software for SAP and Oracle database applications
• Performed check out for the sanity of the file systems and volume groups and verified multipath after EMC Micro Code update.
• Created Volume Groups, Logical Volumes and file systems using LVM/Veritas Volume manager
• Configured the environment for Disk Redundancy using Veritas DMP
• Tuned TCP/IP parameters like TCP window size, etc.
• Implemented network security to various UNIX services.
• Installed and configured SSH server and clients and configured NFS using Auto Mounter functionality.
• Tuned Kernel Parameters as required by applications also upgraded firmware of various hardware components on Unix/X86 servers.
• Installed and configured Apache web server on systems located in DMZ.
• As part of proactive projects, Patch assessments and installations have been carried out efficiently on all production systems.
• Worked on performance monitoring tools like top and Oracle/SAP tools
• Wrote shell scripts to monitor and notify CPU and Disk usage.
• Allocated system storage and planned future storage requirements.
• Creation of users with passwords and assigning them table spaces like user data and temporary, granting privileges (system and object) through roles and profiles on LDAP.
• Implemented different backup methods, automation of backup procedures in relation with Nature of the application.
• Maintain backups and monitor backup integrity using Veritas Netbakcup, Network Appliance snapshot, and ufsdump/ufsrestore Storage and backup.
• Interfaced with system engineers, network engineers, and systems analysts to resolve hardware and networking issues during system implementation and production.
• System monitoring and diagnosis of message logs, execute diagnostics and effect repairs.
• Monitor stability and performance of network and data storage services, ensuring 24x7 operations.
• Managed VERITAS Net Backup (4.5v), VERITAS Backup Exe (9.x)
• Keen expertise in server building using Jumpstart/kickstart
• Experience in Solaris Virtualization implementations such as Zones/Containers & Ldom's in Solaris 10 & 11.
• Took part in the on-call rotation in support of 30 Confidential financial production systems
• Accomplished tasks including the building, maintenance and monitoring of infrastructure build servers and making sure of the availability of accurate release levels of software, backups, and monitoring for the well-being of the system for SAP/Oracle data guard Applications.
• Kernel configuration on the operating system for optimum performance.
• Performing updates and upgrades on the systems currently on the network for performance and auditing purposes.
• Troubleshooting and Trouble Analysis of operating systems with signs of degradation in resources and performance.
• Designed, built and participated in the DR test for the infrastructure and verified DR system is functioning properly.
• Storage Provisioning, Volume and File System Management using LVM/Veritas on Linux/Sun Solaris OS in a SAN environment.
• Clustering solutions for High Availability using Sun Cluster Server for SAP and Oracle Data Guard for Oracle database.
• Configuring network services such as DNS/NFS/NIS/NTP for UNIX/Linux Servers.
• Setting up UNIX/Linux environments for various applications like SAP and Oracle.
• Instrumented shell scripts for day-to-day tasks.
• Troubleshooting issues, developing procedures and performing change management.

Confidential

Sr. Solaris/Linux Solution Architect

Responsibilities:

• Installation and configuration of Sun Solaris 8/9/10/11 on Sun servers with Jumpstart and NFS.
• Upgrading Solaris 7/8/9 to Solaris 8/9/10/11 using live upgrade and manual upgrade.
• Configured, Installed and Administered Solaris Containers (Zones) and LDOMS.
• Patched the Solaris 8/9/10/11 server boxes at the latest patch cluster and patched the local zones using parallel patching.
• User account creation and account maintenance for various application and NIS.
• SSH Installation, Kernel parameters tuning and installing locale packages on Solaris 10
• Perform all duties related to Solaris system administration NIS, DNS. NFS, SSH, user account maintenance, backup & recovery, Auto-mounter.
• Administration of Security Regulations for Systems using CIS standards.
• Monitoring system resources, logs, disk usage, scheduling and monitoring, backups and restore on Veritas Net Backup 6.5.
• Worked on VMWARE for creating the VM from scratch and template, cloning the virtual for creating new VM.
• Installation, configuration and maintenance of Veritas Volume Manager on Sun Solaris/RedHat Linux environment.
• Experienced in redefining volume groups, migrating, mirroring logical volume using VERITAS VOLUME MANAGER.
• Worked on Veritas Cluster 5.0 and 5.1 used on Solaris and Linux systems to manage the cluster of SAP and Oracle applications
• Install and configure VCS from scratch and provide the day-to-day support for the high-availability of the production applications and also participate in the DR test for the various critical Global Market applications.
• Worked on Sun Cluster used on Solaris systems to manage the cluster of SAP and Oracle applications
• Install and configure Sun Cluster from scratch and provide the day-to-day support for the high-availability of the production applications and also participate in the DR test for the various critical Global Market applications.
• Software package administration, involving adding and removing software packages on SUN hardware like M4000, M5000 and M10
• Set up Quotas for the user accounts & limiting the disk space usage.
• Installation and configuration of SAP and Oracle, creating clients, setting transport systems, view runtime attributes, commit modifications and setting up security using Authentication, Authorization, Certificates, Credentials, and Permissions.
• Monitored systems using tools from SAP and Oracle.
• Installed patches and packages for security vulnerabilities for Linux, Solaris and Windows.
• Performed Cluster failover and DR tests for SAP applications and Oracle database servers.
• Development of scripting tools for internal use for automation of some regular jobs using shell scripting.
• Responsible for setting up NFS server and client, Telnet server, FTP servers, DNS, DHCP, LVM, and Apache Configuration, Samba installation and configuration.
• Working in a 24X7 on call rotation to support critical production environments as Unix Level 3 and supported different application like SAP and Oracle for customers like Confidential, Confidential
• Configured the console servers and administered the accounts.
• Make script for day-to-day task & Mass installation of the software like SAP GUI.
• Certified the SPARC Solaris/Linux and boxes which includes the Server build and configuration and making it to match the company standards.
• Worked on the Sun Security tools to find the vulnerabilities and remediate the findings.
• Involved in job Scheduling, vulnerability remediation and gap remediation.
• Administration of Sun Solaris including performance monitoring, scaling and failover testing
• Installing and partitioning disk drives, creating, mounting and maintaining file systems to ensure access to system, application and user data.
• Performed check out for the sanity of the file systems and volume groups and verified multipathing.
• Reviewed existing Standard Operations procedures for all the technical infrastructure
• Gathering configuration information and hardware details for SUN servers for migrations
• Worked on NFS clients to unmount shares from the SUN (Solaris) servers that were moving from data center to data center.
• Troubleshooting on relocated/migrated SUN severs to bring them up in the data-center
• Reconfiguring Consoles, NIC on the servers.
• Worked with SAN storage migrations team to bring the disks online.
• Worked on Veritas Volume Manager and Veritas file system.
• Worked with Linux, SAN, Oracle, SAP and Network teams to ensure the smooth relocation of the servers.
• Worked with Remedy helpdesk to resolve issues on servers
• Worked on File-system Administration, clean up and space management
• Worked on procuring Hardware components from vendors
• Escalating hardware software issues to technical support providers including SUN, EMC and Veritas Software.
• Worked on SAP and Oracle Application servers’ migration.
• Working with SAP basis and DBA’s to troubleshoot and maintain ORACLE Database, Oracle Apps and SAP applications.
• Implemented different RAID level for maintaining Data redundancy and performances.

Confidential

Sr. Unix Admin

Responsibilities:

• Participated in the new SAP/Oracle ERP project
• Installed the Confidential RISC 6000 Unix servers and installed patches and packages for security vulnerabilities.
• Performed check out for the sanity of the file systems and volume groups and verified multipathing after EMC Micro Code update
• Reviewed existing Standard Operations procedures for technical infrastructure.
• Gathering configuration information and hardware details for Confidential RISC 6000 servers
• Worked on NFS clients to mount shares from the other RISC 6000 servers.
• Worked with SAN migrations team to bring the EMC disks online.
• Managed Disks and File systems using AIX tools.
• Worked with SAP, SAN, Oracle Database, and Network teams to ensure the smooth relocation of the servers.
• Tuning and rebuilding of kernel on RISC 6000 Boxes.
• Created and modified shell scripts for automating jobs
• Coordinated with the Storage, Network, SAP, Oracle database Administrators to resolve issues
• Managed, resolved access issues with SAMBA and NFS.
• Managed the backup and restore of the servers
• Installed, configured and maintained SUN cluster system for SAP and Oracle