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Sr. System Engineer/linux-unix Administrator Resume

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Austin, TX

SUMMARY

  • 8 years of IT administration Multiplatform experience on server - based operating system, kernel configurations on UNIX/LINUX flavors - RHEL/Cent OS (5, 6, 7), Ubuntu (14, 16, 18), Sun Solaris (9, 10, 11).
  • Experienced Unix/Linux System Administrator with a demonstrated history of working in the information technology, Networking, Kernel parameter & Tuning, troubleshooting system & Performance issues, Package management and patch management, Cloud infrastructure andservices industry
  • Automated the Linux/Unix infrastructure tasks for process automation of databases, applications, backups and scheduling using Shell and Python scripts
  • Responsible for various system Administration tasks UNIX to LINUX migrations, DC migration physical to Virtual migration for customers
  • Experience on installation of IBM Web Sphere applications like Message Broker, Integration Bus, App connect Enterprise and WebSphere MQ
  • Deploy, configure, maintain compute on Azure cloud
  • Experience on installation of VMware ESX, ESXI migration of VM’s from one host to another host, migration of VM’s from one data storage to another data storage, patch management
  • Worked on Windows server 2003, 2008, 2016 OS on applying the security patches to remediate the vulnerabilities and handling few administrator tasks.
  • Experience in dealing with Windows - Virtual Networks, Virtual Machines, Cloud Services, Resource Groups, Express Route, VPN, Load Balancing, Application Gateways, Auto-Scaling, and Traffic Manager.
  • Major focus on Configuration, SCM, Build/Release Management, Infrastructure as a code (IAC) and as Azure DevOps operations Production and cross platform environments
  • Experience with Tripwire and SIEM technologies.
  • Responsible for Middleware software management, building, installing, and configuration of Linux based servers, deploying and testing OS, security updates, baselines and disk imaging, upgrades, patching, load sharing facility (LSF) and maintenance and Disaster recovery exercises
  • Provided Disaster recovery and backup/recovery support for large scale data centers globally
  • Handled Disaster Recovery with high availability across distributed data systems and data domains
  • Upgraded Disaster Recovery backup and recovery documentation including databases
  • Provided Disaster Recovery support for clients using different hardware on different Linux flavors
  • Working experience on Windows Active Directory and LDAP
  • Configured Kickstart servers for complete hands-free installation of workstations with custom profiles, begin/finish scripts and custom package suites/clusters
  • Install and manage security reporting tools used to monitor changes to the Active Directory
  • Expert noledge of AWS Cloud and their technology offering, APIs and Enterprise integration points.
  • Troubleshoot AWS related issues and engaged internal teams and vendor for issue resolutions
  • Having good experience on RedHat Satellite 6, IBM BigFix with OS patching, upgrading and deploying on RHEL servers
  • Integration of various network related services like NFS, NIS and DNS
  • Installation and configuration of Apache, Tomcat / WebLogic on Linux servers and database installation includes Oracle, SQL and MYSQL
  • Configuration management for Web Application server Tomcat, Apache, WebLogic and WebSphere
  • Monitor Disk space and space as needed in LVM, setup and administration of VERITAS Volume manager and HA Clusters
  • Basic noledge of networking devices such as F5 load balancers
  • Experience on storage LUN migration as per requirements
  • Implemented and key person on AIX to RHEL 7 migration process with Infrastructure App analysis, standard build, Functional application analysis, Readiness and risk analysis, Strategic migration plan formation and Migration implementation
  • Hands on experience with ticketing tools such as Service now, Remedy, JIRA and BMC service desk express
  • Handled various operation escalated issues, performance optimization and tuning wherever required
  • Worked on some account management type tasks were done such as clear to new server builds, internal documentation updates, contacting customers for scheduled maintenance and more
  • Experience with SSL certifications and implementation/renewal of certificates
  • Experience on working with certificates like installation of SSL Certificates on Linux servers and SSL/TLS usage and troubleshooting
  • Worked on Kickstart files, PXE boot and Ansible playbooks for automation
  • Experience in administering servers running on KVM, VMware ESX, and Hyper - V and vSphere
  • Experience in configuration of DNS, NTP, DHCP, NFS and LDAP.
  • Experience on Networking (TCP/IP, httpd, tcpdump, VLAN tagging).
  • Built and deployed Docker container for improving developing workflow, increasing scalability and optimizing speed.
  • Experience on Solar Winds, Morpheus, Naigios and Logic Monitor monitoring tools for daily health check-ups, performance monitoring, failure analysis
  • Configuration of high availability cluster across Red hat and perform HA test
  • Worked on advanced systems administration, operational support and problem resolution for UNIX/LINUX based systems.
  • Extensively worked in setting up Pluggable Authentication Modules (PAM) authentication for AD on SUSE and Ubuntu servers.
  • Having noledge and familiarity on load balancing, firewalls.
  • Experience on Windows Active Directory, DNS, DHCP, Windows desktop and Remote desktop. Implementation and administration of Active Directory in Windows 2008, 2012 and 2003 environment. Creating and Managing Users, Roles and Access Permissions.
  • Team player with good management, analytical, communication and Interpersonal skills.

TECHNICAL SKILLS

Operating Systems: RHEL/CentOS 5, 6, 7, Ubuntu 14, 16, 18, SLES (Suse) 12, 15, Solaris 10, HP-Unix, AIX (VIO, HMC), HPC Cluster, ITIL Process, 24x7 Operation support

Cloud: AWS, Azure

Hypervisor: KVM, VMware (vSphere, vMotion), Xen, Hyper-V, Nutanix

Hardware: HP ProLiant, Blade servers, Super Micro Servers, Dell PowerEdge, Dell EMC (iDRAC), Storage servers NetApp, Security Monitoring Tools HP ArcSight, RSA Envision, Splunk, IBM Qradar and Tripwire

Software: ITIL Process, Service Now, Remedy (ITSM), Splunk, Thycotic, SolarWinds, Jira, Nagios, Morpheus, Microsoft teams

Web/ Application Server: IBM WebSphere Message Broker, Integration Bus, App Connect Enterprise, WebSphere MQ, JBoss, NGNIX, WebLogic, Apache servers, LAMP architecture, PKI (Public key Infrastructure), Digital certificates, Postfix

Active Director: Kerberos, LDAP, NTP, Samba

Database: MySQL, Oracle, NoSQL, MariaDB

Storage: NetApp, Active Directory, Samba, Kerberos, PAM

Network Protocols: DHCP, DNS, SSH, NTP, SNMP, SMTP, HTTP/HTTPS, Firewall, SELinux, NFS, NIS, RAID, TCP/IP, Tcpdump.

Scripting Language: Terraform, Bash, PowerShell, Python, Perl

PROFESSIONAL EXPERIENCE

Confidential, Austin, TX

Sr. System Engineer/Linux-Unix Administrator

Responsibilities:

  • Administration middleware application of RHEL/CentOS (4/5/6/7/8), Ubuntu (14, 16, 18), Sun Solaris 9, 10, IBM AIX and Windows servers 2003/2008 R2, 2012, 2016 servers which includes installation, testing, tuning, upgrading and loading patches troubleshooting server issues.
  • Worked on Configuring Ansible master server and installing Ansible client throughout Linux infrastructure by creating the ansible-user in our environment
  • Worked on IBM WebSphere applications on App connect Enterprise, WebSphere MQ and supported, troubleshooting WebSphere application
  • Used Ansible to Automate the Various deployment using playbooks
  • Wrote Ansible, terraform scripts to automatically update system components, saving 30% admin time
  • Experience in providing automated solutions using Terraform, Ansible Modules
  • Helped team on supporting the IBM WebSphere message Broker and Integration bus
  • Implemented Ansible to manage all existing servers and automate the build/configuration of new servers
  • Involved in creation of virtual machines and infrastructure in the AWS Cloud environment
  • Worked on security vulnerability on application security patches for critical production, Dev and test servers for remediating the vulnerabilities using RedHat Satellite 6
  • Installed and configured GIT and communicating with the repositories in GITHUB
  • Configuration for all GIT Repositories and managed multiple GIT repositories with a version control wrapper tool REPO
  • Installed and configured Tripwire Enterprise 7.5 for Oracle, UNIX and Red Hat Enterprise Linux servers.
  • Red Hat Satellite 6 strong experience with Satellite Server management and configuration
  • Created and customized system, Java, Jboss & Splunk application, search queries and dashboards
  • Created Splunk reports, dashboards, forms, visualizations and alerts
  • Addressed users to customize and configure Splunk to meet their requirements
  • Wrote playbooks and automated the administrative tasks, security patching and upgrading on organization infrastructure
  • Implemented Disaster Recovery for all production servers using EMC networker and NAS
  • Implemented new Disaster recovery EMC Networker backup solutions and Vertias volume manager, including documentation and database support
  • Experience with Dell hardware withDell PowerEdge, Dell EMC and (iDRAC)
  • Worked on VMware, vSphere with provisioning, cloning, VLAN isolation and troubleshooting the VMs (network adapters)
  • Maintain Qradar components like Console, Event Processors, Flow processors, Event Collectors, Flow collectors to Environment for Log collection and monitoring.
  • Worked on TLS upgrades on production JBoss web server’s infrastructure
  • Develop Rules and Reports in Tripwire and Puppet to demonstrate compliance
  • Deployed AWS virtual machines and cloud services (PaaS role instances) into secure VNets and subnets
  • Exposed virtual machines and cloud services in the VNets to the internet using AWS load balancer
  • Worked on Docker containerization, creating Docker images and handling multiple images primarily for middleware Installation and domain configuration
  • Provisioning Docker containers as per requirement for engineer team and troubleshooting if it has any issue through service now tickets
  • Experience working with windows server on applying the security patches (KBs), windows registry, file system, services, Devices and security
  • Working on VLAN Isolations for windows 2003 and 2008, 2012 and 2016 servers
  • Automated environment and system administrator tasks with shell and python scripting
  • Involved Installing RedHat Linux using kickstart and applying security polices for hardening the servers and performed the VLAN isolation for 900+ servers for Windows servers
  • Experience in Developing and testing of Content (Correlation rules, Reports, Dashboards and Asset modelling) and integration and testing of multiple feeds like databases, Applications and network and Security devices logs to SIEM tools for threat detection.
  • Applies advanced troubleshooting to operational issues in a global compute farm environment
  • Provide ownership of technical issues within the IT Operations Team
  • Handling of 2nd and 3rd level IT tickets e.g., system configuration, advanced trouble shooting, System monitoring and handling of deviations and alerts and Participate in team on-call rotations
  • Integrates, installs, configures, tests, and supports compute environment systems with focus on the Linux platforms Redhat, and Ubuntu
  • Integrate Qualys guard scanner to Qradar to populate vulnerability information to associate internal assets.
  • Recommended and configure Correlation rules and reports and dashboards in QRadar Environment.
  • Configure Network Hierarchy and Back up Rention configuration in QRadar SIEM.
  • Participate in minor projects associated to the enhancement, upgrade/patching, or implementation of new or existing technology solutions
  • Experience in working Tripwire intelligence gathering asset validation
  • Operation and configuration of other compute farm components (VNC/LDAP/LSF)
  • Interacts with end users, IT partners, system architects, and service and support teams worldwide
  • VMware and vCenter administrator infrastructure management including performance tuning, capacity planning, and cluster management
  • VMware and virtual machine installation, configuration and management
  • Creating Jenkins Pipelines with Jenkins Scripted File. Triggering the Remote Jenkins Jobs.
  • Installed Jenkins on a Linux machines and created a master and slave configuration through a build farm for implementation of multiple parallel builds.
  • Server monitoring experience (Solar Winds Server and Application Monitoring preferred)
  • Red Hat Enterprise and CentOS Linux cluster configuration and management for secure applications
  • Network and server monitoring using Wireshark, SNMP, and similar applications
  • VLAN set up and administration
  • Enterprise backup application noledge, and experience implementing backup and restoration strategies (Symantec NetBackup and EMC Data Domain
  • Network firewall and PIXIE boot configuration and administration
  • TCP/IP, FTP, HTTP, NTP, and other network protocols
  • Documentation and presentation of technical material
  • Monitor system performance proactively to identify abnormalities and develop capabilities to prevent unscheduled downtime
  • Configure Daily and weekly and monthly reports in Qradar and Splunk based on Compliance requirements.
  • Coordinate and manage deployment of periodic software releases across infrastructure with customers and team mate software applications developers
  • Microsoft IE, Windows Office product, SharePoint, Exchange, Visio, and Chrome usage
  • Windows Server, active directory, DNS server, DHCP server, and group policies management
  • Worked in production & application support 24/7 with on call support on Unix/Linux Environment
  • Implemented security policy and managed firewalls/IDS. Managed DNS, send mail, IP space, and co-location facility transition.
  • Maintained Volumes and File systems for Oracle, MySQL, DB2, Sybase databases
  • Applying security patches to RHEL servers using RedHat Satellite 6
  • Managing systems routine backup, scheduling jobs using cron, enabling system logging, network logging of servers for maintenance, performance tuning, and testing.

Confidential, San Diego, CA

Sr. Systems Administrator

Responsibilities:

  • Responsible for Installation, configuring standard and advanced (net installation and kickstart) and administration of Linux (RHEL, CentOS), Adding Users/Group accounts Using Command line Interface, LVM management, Swap partition, network configuration, load sharing facility (LSF) and troubleshooting.
  • RedHat Satellite 6 and Capsule server expertise.
  • Supported middleware web application for application teams on IBM WebSphere message broker, App connect Enterprise and troubleshooting if any issues found
  • Working noledge with automation/management tools such as Ansible, RedHat Satellite
  • Creating PowerShell & python scripts for various systems administration tasks to automate repeated process
  • Creating and maintain users, profiles, security rights, disk space and process monitoring
  • Performing network configuration in Linux environment
  • Worked on Splunk tool for monitoring our project infrastructure for health checks
  • Developed custom Splunk ES correlation searches and tune notable events
  • Configuring and installing Apace web servers deployed in Linux environment
  • Administration of client computers using SSH and FTP
  • Configured and troubleshoot the IP address and LAN.
  • Support for application upgrade & rollback, serviced start/stop on Linux servers
  • Gained experience in deploying application on to their respective environments using Ansible
  • Worked on application deployments & environment configuration using Ansible
  • Handled hardware issues like memory, hard disk, Motherboard and processor etc.
  • Solving server problem with rescues mode recover file system corrupt from console
  • Worked on setting up physical servers on VCS, nodes, storage and networking.
  • System configuration/hardening using IP tables, SElinux, Permission on Linux servers as well as restricting access to terminals, disabling unnecessary services and securing server room.
  • Responsible for day-to-day support of enterprise backups and disaster recovery systems in 27x7 support schedule
  • Implementing NFS, Samba, FTP, DNS and DHCP on LINUX servers
  • Setting up NAS using free NAS and creating, managing file systems LVM, ZFS
  • Performing duties as assigned in support of the customer and assisting end-users with general IT questions and support
  • Hardening the system at a high level, making sure SElinux is in Enhance mode. Setting up complex password policy for user accounts and groups
  • Worked on encryption technology on installing and updating SSL certificates
  • Experience on working with encryption (TLS, SSL, Secure Boot, Security certificate Management and Rest)
  • Monitoring system performance using TOP and advance monitoring tool like NAGIOS and Cloud Watch for AWS to make sure CPU health

Confidential, Richfield, MN

Linux Administrator/AWS Engineer

Responsibilities:

  • Built, deployed and configured of Unix (AIX) and Linux servers SUSE 12, UBUNTU 18.04 LTS Linux (Debian) on SUPERMICRO hosts for the Deep Learning project, thereby providing the path for enabling the smooth and successful migration of servers
  • Responsible for implementing NVIDIA-GPU workstations and provisioning Virtual Machines on KVM hypervisor for Data Science (Engineering) clients/workstations
  • Worked on KVM hypervisor to setup complete environment of Test, Dev and production environment
  • Responsible for building and managing CI/CD pipeline for various using GIT, Jenkins and Ansible
  • Create, extend, reduce and administration of Logical Volume Manager (LVM) in RHEL environment.
  • Integrated PAM Authentication on Solaris, RHEL and Ubuntu 18.04 servers.
  • Advanced noledge in troubleshooting errors associated with SUSE and UBUNTU servers
  • Worked on PAM authentication to allow engineering team to access to Linux boxes on their windows AD credentials
  • Integrated windows Active Directory to SUSE and UBUNTU Linux machines as users can login with their windows credentials into Linux machines.
  • Moved many Physical servers into IT data center and mounted into racks.
  • Taking direction from the team lead and worked within a team-environment to achieve the organization goals
  • Worked on build process Docker container servers managed by Kubernetes
  • Provided technical solutions to a wide range of problems and user requests through an established IT-Ticketing system Service Now.
  • Worked on Docker, Jenkins, VMware, RHEL, Satellite, LDAP, Active Directory, OpenShift, Kubernetes, antifactory Ansible, CHEF & Github, managed SVN, Git repositories for branching, merging, and tagging
  • Worked on build process Docker container servers managed by Kubernetes
  • Installed, configured and maintaining various Linux flavors (RHEL, CentOS, Scientific Linux, Ubuntu, SLES etc.) and associated applications
  • Perform standard administration tasks (packaging, OS installs, patch management)
  • Configured RAID and IPMI on physical servers and accessible remote access for physical servers.
  • Regularly collaborating with Project management team to update the Phases of projects
  • Worked on Linux based storage manager such as LVM.
  • Provide Linux support to IT infrastructure and Engineering users
  • Daily tasks include communicating with different functional groups like Engineering, IT and Vendors.
  • Installation of RHEL, SUSE and Ubuntu for Deep Learning environment on multiple Hosts and VMs.
  • Configuring Bond, Bridge for physical interfaces with VLAN tagging.
  • Creating VM’S using templates manually and supporting them.
  • Troubleshooting many network issues on network conflicts and made all servers are up and run-in port channel on switches.
  • Worked on commands on windows PowerShell ISE to retrieve user’s information from active directory.
  • Created mount points and assigned group level storage sharing in NetApp storage server on Infoblox platform.
  • Managed many data center operations like mounting physical servers in rack, installing the 10G Transceivers to Dell switches, working on KVM switches.
  • Worked on NFS storage to mount various paths for users to store their data.
  • Manage on premises and cloud environment running on AWS.
  • Plan, deploy, monitor and maintain AWS cloud infrastructure consisting of multiple EC2 nodes as required in the environment
  • Developed automation and integration utilities using Bash, Python and automating tasks with Ansible
  • Integrated the VMs infrastructure into a dashboard available tool Morpheus for start/stop VM.
  • Provisioned the Docker, Nvidia-Docker enabled VMs for users where they want to work on Containers.
  • Collaborating in regular basis with weekly updates on Project phases with project team, leads and product owner.
  • Worked on Nutanix cloud-based platform and provisioned VMs to users.
  • Worked on EC2 and provisioned 100+ Instances in AWS, for Hackathon 2019.
  • Configuring SNMP to many servers for adding hosts in Logic Monitor.
  • Performs daily system monitoring, verifying the integrity and availability of all hardware, server resources, system and key processes, and reviewing systems and application logs

Confidential, Chantilly, VA

Linux/Unix Administrator

Responsibilities:

  • Primary responsibility includes building and supporting Red hat Linux servers.
  • Installation and configuring of Linux/Unix servers.
  • Involved in Building and configuring Solaris 8/9/10 using Jump start server and Red Hat Linux Servers using Kickstart server as required for the project. Maintained maximum uptime and maximum performance capacity for Enterprise Production, QA, and UAT/Staging.
  • Experience in Installing and Configuring Puppet, MySQL, Tomcat on RHEL
  • Troubleshooting Linux OS related issues like Disk, CPU utilization, Memory Utilization, SSH.
  • Performing patching, upgrades and security support with extensive troubleshooting of OS and application issues
  • Extensive use of VERITAS Volume Manager for Disk management, file system management on Sun Solaris environment.
  • Implemented day-to-day tasks in RHEL and CentOS that includes upgrading kernel, configuring, multi-pathing, NAS Mount and Unmounts.
  • Worked on post build activity like NetBackup client, installing required packages which are requested by application and database team.
  • Perform package management using pkgadd, pkgutil in Solaris and using rpm, yum in Linux
  • Installation of SSH and configuration of key based authentication.
  • Archive, compress, unpack and uncompressed files using tar, gzip and bzip2.
  • Supporting the application team on the go live activities.
  • Installing OS on physical servers manually, by using foreman tool and supporting them.
  • Configuring the IPMI, RAID controllers during the build phase and make sure they comply with the company standards.
  • Developed Puppet modules to automate deployment, configuration, and lifecycle management of key clusters.
  • Created Zettabyte file system (ZFS) in Solaris 10. Created zpool. Exported ZFS from local zones to local zones.
  • Expertise in Linux backup/restore with tar including disk partitioning and formatting.
  • Planned, scheduled and Implemented OS patches on both Solaris & Linux boxes as a part of proactive maintenance.
  • Extensive experience in installing, integrating, tuning and troubleshooting Apache, Tomcat, WebSphere and WebLogic application server.
  • Implemented SUDO, SSH and other security tools and implemented SOX (Sarbanes Oxley) security compliance.
  • Monitoring CPU, memory, iSCSI disks, disk controllers, physical disk, HW and SW RAID, multipath, file systems, network using the tools NAGIOS and BMC Tools.
  • User Administration, Package Installation method (RPM, YUM, APT-GET)
  • Following Agile Scrum methodology for the delivering the products.
  • Assisted in configuring the application servers with other components such as database, web servers, LDAP directory, Active Directory, BEA Web logic etc.
  • The daily mix of tasks includes migration of AIX server to Linux (RHEL/CentOS)
  • Installing and troubleshooting Ftp, MySQL, php, phpMyAdmin, VNC, Apache, Tomcat, NTP, and NFS.
  • Extensive use of VERITAS Volume Manager for Disk management, file system management on Sun Solaris environment.
  • Created Zettabyte file system (ZFS) in Solaris 10. Created zpool. Exported ZFS from local zones to local zones.
  • Basic Administration of VMware like adding disk and checking logs etc.
  • Installation and configuration VERITAS NetBackup on Sun Severs and performing Backup using VERITAS Net Backup.

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