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Operating Systems Engineer Resume

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Chicago, IL

SUMMARY

  • Experienced Systems Administrator, with Ten years of IT experience with expertise in Deploying, and Administering Enterprise Level POSIX Systems (Linux based: RHEL, Debian, Suse. UNIX based: Solaris, HP - UX, AIX), Citrix and Systems Security
  • Ten years of experience in System Administration in Linux/ Unix / Windows / Citrix Environments in Large Enterprises involving installation, administration, configuration and deployment of Red Hat Enterprise Linux 4.x/5.x/6.x, CentOS and installation of packages and patches for Red hat Linux Servers.
  • Highly Experienced in Installing, Monitoring and Maintaining Multiple Operating Systems through (script) automations
  • Experience in Kernel updating in Red Hat Linux 4.x/5.x/6.x servers.
  • Installation, Configuration & administration of Redhat Cluster and managing with the Conga
  • Eight years of experience in System Security Implementation, Management of multiple clusters for Data Analysis, Scientific Research etc.
  • Experienced in Deployment Automation for hundreds of systems over Multiple Clusters and Geographic Locations
  • Experienced in Hardware and Software Systems Management
  • Expertise in Disk and File System Management using in RHEL( LVM related), Solaris(SVM related), Semantec / Varitas (Storage Foundation for Linux & Solaris)
  • Experienced in User Management in all POSIX systems
  • Highly Experienced in Systems monitoring, Performance tuning, Automating Backups & Restoration
  • Five years of experience in virtualization in various platforms ( Linux, Solaris, AIX, VMware)
  • Highly experienced in deploying virtual environments in RHEL systems using KVM, LC, Xen etc.
  • Expertise in Creating and Managing Datacenters based on AWS, KVM, Open Source Cloud software ( OpenStack, CloudStack etc)
  • Expertise in planning and executing Migrations ( physical/virtual) in most Virtualization environments
  • Highly Experienced in Deploying Applications in Linux/UNIX Environments
  • Expertise in deploying Application Servers, Web Servers, Databases, ETL Tools in Linux/UNIX Environment
  • Experienced in installing and Managing Apache Tomcat, IBM WebSphere, on RHEL and Solaris Systems
  • Experienced in Installing and Managing Oracle, DB2, MySQL Databases on RHEL and Solaris environments
  • Highly Experienced in configuring storage for Linux/UNIX systems
  • Expertise in Network Storage Solutions using NAS Appliances, iSCSI SAN, NFS etc.
  • Experienced in FC SAN Storage Management using Brocade and HP Storage Works FC Switches and Directors
  • Worked with customers to design and configure theJIRAand Confluence applications (e.g. projects, workflows, screens, fields, permissions, plug-ins)
  • Well-versed Hardware and OS Configuration of FC based Networks ( QLogic, Brocade FC HBAs, FabricOS)
  • Expertise in configuring Linux/UNIX Networking, Configuring LANs, VLAN, VPN, Firewall, Internet Security Devices and F5 Load Balancing
  • Excellent knowledge of DNS, Install and BIND configuration
  • Good knowledge of Perl, Ruby and Python.
  • Experienced in configuring Cisco Routers and Switches
  • Expertise in Server Hardening using various tools in Linux/UNIX environment
  • Experienced in configuring Software Firewall ( Iptables/firewall/fw)
  • Experienced in configuring SSL, SSL Certificate Creation, TLS for Active Directory
  • Excellent knowledge of configuring NIS, LDAP
  • Familiar with Firewall rules on Appliances like pfsense Firewall hardware
  • Good knowledge of shell scripting ( bash/csh/kshetc)
  • Familiar with java, C++, HTML etc.
  • Highly experience in coordinating events with clients and various development groups on and off shore
  • Experience with providing support to development teams: Handling issues, tickets and 24/7 support etc.
  • Switched Virtual servers to various devices in order to minimize the downtime for planned maintenance of the host system.
  • Hands on experience in Amazon's Web Services (AWS) cloud platform.
  • Simplified the process of continuous server mirroring by virtualization to reduce unexpected downtime.

TECHNICAL SKILLS

Operating Systems: Sun Solaris 10/9/8/7/2.x, Red Hat Enterprise Linux 3/4/5, SUSE Enterprise Linux 9/10,IBM AIX 5.x, HP-UX 11.0, Citrix, windows NT4.0, Windows 98/2000/2003/2008/ XP/VISTA.

Hardware: Sun Fire Servers - E25k,E15k,12k, E280R, E480R, V240,420R, V440, V480, V490, V880,V890 and 4800 Data Centre Servers - E250, E450, E3000 and E3500 Tape Libraries - Sun StorEdge L20/L40/L60, L180 and Storagetek’s 9840 Arrays - Sun StorEdge 3130, A1000/D1000, EMC DMX 800 and 1000

Tools: Sun Cluster 3.2, VERITAS Netbackup 6.0, VERITAS Storage Foundation Suite, Solaris Volume Manager, send mail, Tumbleweed tool.

Languages: Shell scripting, Java PL/SQL, HTML, JavaScript

Databases: Oracle 10g/9/8, MYSQL

Networking: TCP/IP, DNS, NFS, NIS, SSH, DHCP, Cisco Routers / Switches and LAN

PROFESSIONAL EXPERIENCE

Confidential, Chicago, IL

Operating Systems Engineer

Responsibilities:

  • The Operating systems engineer is responsible for acquisition, installation, operations, maintenance and usage of complex computer systems, including building new/rebuilding old Linux/Solaris/Windows systems plus associated hardware and software, performing regular security monitoring.
  • Installation of complex software’s on new / rebuild existing servers. Configuring and administering software services, settings, directories, storage, etc., on Linux/Unix/Windows/Solaris/VMware and Citrix environments in accordance with standards and project/operational requirements
  • Install and configure operating systems and other software and routinely test installed software for glitch detection and other issues
  • Installed and configured VMware ESX server instances for virtual server setup and deployment
  • Provide technical direction to IT support staff
  • Monitor and test application performance for potential bottlenecks, identify workable solutions
  • Maintain security, backup, and redundancy strategies
  • Experienced in Installing and Managing Oracle, DB2, MySQL Databases on RHEL and Solaris environment
  • Participate in the design of information and operational support systems
  • Liaise with vendors, LOB and other IT personnel for problem resolution
  • Execution of deployment operations to monitor and improve on pre-release, upgrades and current versions of software.
  • Scheduled jobs using HPSA automation tool that can integrate automation on Windows, UNIX, Solaris and Linux server environments and across multiple business applications.
  • Event-driven scheduling and advanced options for ensuring that tasks are completed on time and in the desired order
  • Custom notifications via email or SNMP trap
  • Simple file transfers without the need to enter syntax
  • Central monitoring, including a dashboard that provides detailed data on job scheduling trends and forecasts schedules based on historical activity
  • Excellent knowledge of configuring NIS, LDAP
  • Evaluating compatibility of programs with existing hardware and/or software features.
  • Develop and maintain installation and configuration procedures
  • Research and recommend innovative, and where possible automated approaches for system administration tasks.
  • Expert in JIRA and Confluence technical support and administration.
  • Experienced with Atlassian Suite (JIRA, Confluence, Crowd, Bamboo, Stash) software includinginstallation and implementation, System upgrades, Performance tuning, server optimization,Data migration and Custom configuration.
  • Quickly diagnose and understand technical issues and resolutions across a variety of applications & environments using JIRA.
  • Extensive SQL skills with the ability to develop custom reports in external tools
  • Experience of working in an international team/support environment
  • Experienced with software development processes and UML modeling
  • Familiarity with High Availability / Disaster Recovery Concepts such as load balancing, failover and experience with Application servers highly desirable
  • Excellent written, oral, and interpersonal skills
  • Excellent numeric skills and the ability to present complex data in an understandable way.
  • Methodical and organized approach to work, conscientious
  • Highly self-motivated and directed, proactive, with keen attention to detail
  • Able to work to deadlines

Confidential, Chicago, IL

Systems Administrator

Responsibilities:

  • Designed System Architecture for implementing Cloud Computing services on RHEL 6.x Environment
  • Used Kickstart and wrote shell scripts to install OS on Hundreds of Machines
  • Experience with Jumpstart & Kickstart Installations on Solaris & Linux
  • Building various RPMs and Patches, installing various software’s under SUSE and RHEL Linux environment.
  • Involved in implementing Bugzilla & Mantis Bug tracking tools servers on Red Hat Linux
  • Installing YUM server remotely & locally, scheduled cron jobs for job automation.
  • Worked with Solaris Clusters and deployed two-node cluster.
  • Implementation and Management of Disk Quota on Linux and Solaris Servers
  • Created Virtual Environments using CloudStack to build a private cloud computing platform
  • Implemented FC DataStores using Open Source software(SCST)
  • Configured and Maintained FC Targets (VM Storage Servers) and Initiators spanning over multiple platforms
  • Implemented Zoning in FC switches to augment system-wide security
  • Installed and configured VMware ESX server instances for virtual server setup and deployment
  • Created Quota based Disk Allocation for various Groups and Users
  • Wrote shell scripts to monitor disk usage from a central server ( Re-engineered Ganglia for Disk and Network Monitoring)
  • Created E-Mail Alerts for System Monitoring Services (On CloudStack)
  • Created VM’s for Dev Environment using KVM-Qemu
  • Wrote scripts to automate VM creation and cloning
  • Monitored KVM hosts using web-based gui software ( webvirt-manager, Ovirt-manager) for Non-CloudStack controlled systems
  • Used Chef to manage VM configuration withinAWS.
  • Installed/Configured Solaris/Linux system - Firewall, IDS,VPN Server, VNC, CVS, OpenLDAP, Linux Clustering, SQID,OTRS, Qmail, Sendmail, Web server
  • Wrote Shell scripts to automate OS/Kernel updates
  • Wrote Shell scripts to modify and customize and email logs from various applications to their administrators
  • Wrote scripts to automate VM cloning, Creation & Deployment
  • Wrote scripts to enable Backups and Restoration of VMs, Servers etc.
  • Installed patches and software as needed Solaris 10/8/9 and on Linux Servers
  • Designed and Adopted Documentation practices for most of the Sys-Admin issues
  • Created repositories of Documentation ( Mediaworks - wiki)to be used by current and future admin related personnel and work and internal usage
  • Managed issues and tickets from various clients and development teams.
  • Distributed virtual servers across several physical machines to allow virtual server to run with less required resources during physical machine failure.
  • Provided 24/7 production support

Environment: A heterogeneous mixture of Intel Xeon based server hardware of various generations running RHEL 6.0/6.1, ESXi 5.0/5.5, Ubuntu 10.x/12.x LTS, Oracle Unbreakable Linux, WebSphere. HP SN8000B 4-Slot SAN Director, AWS, QLogic FC HBA, CloudStack, MySQL, Oracle 11g

Confidential, Irving, TX

Systems Administrator

Responsibilities:

  • Installed and configured HP-UX 11i and Solaris 10.1 on Server Clusters
  • Managed and configured system updates more than 500 servers
  • Wrote Unix Shell Scripts for Automate various routine jobs Backup using ADSM. Performance monitoring.
  • Installation and configuration of Veritas Storage Foundation Suite, Volume Manager, Cluster Servers&Veritas File systems (Vxfs).
  • Omni Backup, Netbackup and TSM Backup for backup administration.
  • Installation of SSH and configuration of keys bases authentication.
  • Integrating UNIXfile systems using packages like SAMBA.
  • Setting up printers on UNIX / NT machines to work seamlessly across platforms.
  • Used Solaris Native and Veritas Volume Manager for Disk Management
  • Implemented Disk Resizing Methods using VeritasVxVM and Solaris SVM
  • Responsible for Day-to-day systems administration tasks in Solaris
  • Involved in creating and configuring Zones/Containers
  • Used SMF utilities, Zone Configuration and ZFS file systems
  • Applying patches to the Global and Non global Zones
  • Implemented LDOM onT52xx servers( Various domains like Root/Guest/io etc..)
  • Involved in Upgrading Sun Solaris 8 to Solaris 10 by using LiveUprade. Involved in Upgrading Veritas Volume Manager from 4.0 to 5.0
  • Responsible for supporting more than 1000 SUN/Aix servers for hardware and software incidents and engage sun support.
  • Installed packages, patches and SSL certificates on all web servers.
  • Involved in monitoring and configuring NFS servers and NFS clients
  • Responsible for creating user accounts and setup new workstations: Configuring LDAP, NIS to manage existing and new user accounts
  • Involved in monitoring and troubleshooting network issues.
  • Have very good Operational experience supporting large scaleEnvironments.
  • Network trouble shooting using ‘ndd’, 'traceroute', 'netstat', 'ifconfig' and 'snoop'etc
  • Working closely with Vendors on Hardware Problems, software fixes.
  • Administration of NFS, NIS, DNS, Samba and Send mail servers
  • Creating tickets (IRs) by using CMIS web tool.
  • Monitoring the web logic IRs and resolve the issues.
  • 24/7 Support to clients and developers involving System management issues.

Environment: HP-UX 11iSolaris 8/10, Linux, Sun fire V880, Enterprise server E3800, E6000/6500, M4000, M5000, M900, T5220, T5240, DL380, DL580, Veritas Volume Manager.

Confidential, Dallas TX

System Administrator

Responsibilities:

  • OS Installation, Maintenance: upgrade patches, general patches and OS fixes.
  • User Account Management: Creation, privileges, managing privileges and quota.
  • System Management: System Configuration, audit, monitoring and tuning
  • Bug fixing: responding to user related OS/software
  • Involved in planning and configuring back-up and disaster recovery:
  • Implemented best practices methodologies for AIX disaster recoveries.
  • Restoring the server from mksysb image
  • Remote AIX Installation and Management
  • Implemented Failover Methodologies in all AIX servers
  • Performed Failovers in HACMP/cluster environment, monitoring servers
  • Worked on HMC, Installing and Configuring VIO Server, LPARs/DLPARs and Subsequent Maintenance and administration
  • Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
  • Maintained Availability, Increased capacity & performance of production machines by upgrading their hardware (disks, CPU, memory, IO board, power cooling unit, mother board etc.) & Firmware.
  • Maintained Security: users, groups’ administration management using LDAP
  • Installing YUM Server and Redhat Package Manager (RPM).
  • Setup NFS file systems and shared them to clients.
  • Maintaining appropriate file and system security, monitoring and controlling system access, changing permission, ownership of files and directories, maintaining passwords, assigning special privileges to selected users and controlling file access, monitoring status of process in order to increase the system efficiency.
  • Daily/Periodic backup and restore operations using Tivoli Backup Manager
  • Networking service, performance, and resource monitoring using nmon, nfsstatetc.
  • Gathered performance statistics on the nodes and tuned them to meet the requirements and documented the modified configuration.
  • Involved in 24/7 System/Deployment support

Environment: AIX (5.1, 5.2, 5.3, 6.1), Linux, Windows, VMware, Oracle DB2, pSeries servers, ColdFusion Virtualization, NIM, LPARs, WPARs, DLPARs, WebSphere, TSM, HACMP, Tivoli Backup Manager

Confidential

CRM / Citrix Administrator & Operational Monitoring Agent

Responsibilities:

  • Worked as an Administrator /Operational Monitoring Agent for HP servers and its various high-end products.
  • Client handling and services includes, Calls (inbound and outbound), Managing E-mails, Engaging managers and its business partners for HP presence and non-presence countries.
  • Maintaining windows CRM and Citrix systems.
  • Handling team work after office hours (OHH).
  • Obtaining Quotations, Part Orders & Approx.
  • Material delivery dates Quote v/s Purchase Order
  • Advise any (discrepancy) differences to Onsite Engineer to coordinate
  • Request and update all the relevant information to the client, team and country manager.
  • Check for any Cost change or variation.
  • Follow up project during production
  • Coordinate delivery with the client
  • Arrange shipping, do packing list for shipping, complete invoice for client
  • Follow through installation with client and do site measurement.
  • Final Order checked before final delivery
  • Check total invoice value, match with Purchase Order and any variation done
  • Checking and commissioning after product installation
  • All quality documents from production file in project folder for reference.

Confidential

System Administrator

Responsibilities:

  • Compression and Decompression of files and performed Backup and Recovery on RHEL servers.
  • Maintained data files and Monitor system configuration to ensure data integrity on Red Hat systems.
  • Installed, configured and managed software on RHEL servers
  • Network configuration and troubleshooting of network access for servers and clients especially on RHEL servers.
  • Gap Analysis: Analyzed the client's applications programs to determine the impact of the HIPAA final rule on EDI Transaction Set and Code List implementation and defined the changes to bring the affected systems into HIPAA compliance.
  • Managing system processes and installed services on RHEL servers.
  • Configured, implemented and maintained hardware RAID storage technology on servers configure with RHEL.
  • Configured RAID controllers and disk storage shelves.
  • Utilized kick-Start and ignite for systems builds and recovery on RHEL servers.
  • Experience with network configurations including knowledge of switches and firewalls.
  • Installed and configured VERITAS volume manager on RHEL servers.
  • Re-image client computers and loaded them with new images and software.
  • Written shell scripts for day to day jobs like temporary file removal, resource statistics, Script for exporting ORACLE user backup
  • Configured NFS Servers, NIS+ Servers, NIS+ Clients, Diskless clients and automounted the file systems using direct and indirect maps. Also setup entries in /etc/dfs/dfstab in Solaris share file systems and mounted the disks onto the client systems.
  • Monitor bad user logins and unauthorized users.
  • Creation of database roles and privileges based on the application user.
  • Performed routine activities like user creation, permission granting activities
  • Installed and configured outlook as MS Exchange client, Linux system as Mail Server.
  • Provided customer service to resolve computer issues.
  • Maintain records of daily business transactions, problems and remedial actions
  • Use Web based ticketing System to transmit client request to senior technical team.
  • Ensure that client’s computer have access to SERVERS and other Network resources.
  • Worked as a part of System admin support team.

Environment: s: SSH, SAMBA, and APACHE web server, LVM, Veritas Volume Manager, Red hat EnterpriseLinux3.x, Oracle Solaris 2.5,HIPAA

Confidential,

Lab Assistant / Faculty for .Net Labs

Responsibilities:

  • Also worked for the clients as a Web developer.
  • Worked on SQL Server (DBA) for various clients.
  • Received training in Windows CRM (Customer Relationship Management) and CITRIX systems.
  • Received training in Windows 2003/2008 systems and Cisco routers.
  • Trained on Linux systems and server Administration.
  • Trained on Active Directory User Administration.

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