SUMMARY

• Result - oriented professional having more than 10 years of experience in Financial, Research and IT industry that excels at managing and executing mainly Linux System administration, Engineering, collaborating with project team, interfacing with clients, and deploying technology to build successful solutions for customers.
• My experience includes working with Red Hat Enterprise Linux Version 5, 6 and 7, Oracle Linux 6, CentOS, Solaris 10, AIX5 on various platform i.e. physical, virtual and cloud.

TECHNICAL SKILLS

Operating Systems: Red Hat Enterprise Linux (RHEL) 5x, 6x and 7x, Oracle Enterprise Linux 5x, 6x (OEL), CentOS, Solaris 10, AIX 5

Programming Languages: C, BASH, Python

Database: Oracle, MySQL, MariaDB

Automation Tool: Ansible, Puppet

Virtualization: VMware, VSphere web Client, VM Orchestrator, vRealize Automation (VRA)

Cloud Platform: AWS, RackSpace

PROFESSIONAL EXPERIENCE

System Engineer

Confidential, Washington DC

Responsibilities:

• Build VPC, Instances, Databases, Load balancer, Encryption, fault-tolerant and auto-scalable solutions on AWS.
• Monitoring, set threshold and notification for different AWS services and billing.
• Work closely with RackSpace team to build Physical and Virtual servers on RedHat and CentOS.
• SSL implementation for Apache and Tomcat servers.
• Use PRTG for resource and event monitoring for Rackspace servers, on-site physical and virtual servers.
• Implement single sign-on solution for Linux users using FreeIPA.
• Various auditing for user, system, file system integrity.
• Apply password policy and sudo policy for users.
• Write cron jobs, BASH script for automation of tasks.
• Work on LVM for create and extend VG and LV and mounting.
• Work on different storage client like iSCSI, NFS, Samba.
• Work on network teaming, manage file and port context using SELinux, allow/deny port and services using iptables/Firewalld.
• Check vulnerability database and RedHat Security advisory, Apply kernel patch, security patch from repository.
• System Vulnerability analysis on some extent like packet tracing using tcpdump and wireshark, port scanning using nmap, use different built-in payload, exploit and social engineering tools from Kali.

Senior Linux Engineer

Confidential, NY

Responsibilities:

• Work with different vendor hardware like Dell PowerEdge, HP Rack Mount and HP Blade Logic.
• BIOS configuration, Virtual Connect configuration, Firmware update, RIAD 0/1/5/6 configuration from Smart Array as well as command line.
• VM and Physical build of RHEL 6x, 7x, CentOS 6x, 7x, Windows 2008, Windows 2012 for Portfolio Managers and in-house teams.
• Use PXE, Kickstart, CFEngine, GIT, QIP, Altiris for build automation.
• User authorization and file/directory permission based on application.
• Create Physical Volume, Volume Group, extend Volume Group, Create or Extend Logical Volume, LV snapshot, Disk Partitioning, Creating and mounting file system.
• System performance monitoring and tuning, System call monitoring, packet tracing, resolve boot related issues, System audit, resource monitoring, system security and log monitoring.
• Work with network related issues, bonding, teaming and network and packet tracing tools.
• Manage SELinux context and firewall for ensuring security of different application, service and ports.
• Write cron jobs, BASH script for automation of tasks
• Write Ansible playbooks for automation of recursive tasks and gather system information for QA purpose of newly built systems.
• Response problems and keep track of changes using Service-Now.
• Organize and participate bridge with vendors and in-house teams to fix issues.

Linux Engineer

Confidential, NY

Responsibilities:

• New VM and physical build of RHEL 5, RHEL 6, RHEL 7, OEL 6, Solaris 10 for hosting of web servers, Database servers and application servers of different phases like production, staging, development and test. Created VM templates and used VMware Orchestration, vRealize Automation for VM builds.
• Update kernel and security patches, Firmware update using ILO.
• Migration of VM guest between hosts and datastore.
• Monitor NetBackup, NetIQ and CA Control Minder clients and work closely with backup and recovery team to resolve any issues.
• Strong knowledge in SELinux and Firewalld
• Experience on installing and configuring Solaris 10 zones, network configuration, user creation, install packages, creating file system, data group creation on VCS, mounting VCS file systems, migration of zones between servers. Service group creation, clustering using Veritas Cluster Manager.
• Response problems and keep track of change using Remedy.
• User authorization and file permission locally and using Control Minder.
• Create Physical Volume, Create new Volume Group, extend Volume Group, Create new Logical Volume and Extend Logical Volume, LV snapshot, Disk Partitioning, create swap file on runtime. Work with storage team to mount SAN, NAS, create and mount VERITAS volume as per storage requirements of database, development and application teams.
• Work with LUKS encrypted partitions.
• Practical Knowledge on working with FC HBA, EMC Powerpath and Veritas Cluster Service.
• In depth knowledge on Linux commands and files to investigate problems and solve issues.
• Work closely with network team with and network related issue which includes network interface configuration, NIC bonding for load balancing and failover of NICs, Network troubleshooting.
• In depth experience of writing shell scripts using BASH and Expect. Written number of BASH script for system monitoring, database backup, system backup and automate tasks.
• Create user and group as required, implement password policy, password lifetime, minimum length, set password complexity, failed login attempt, lock, unlock. Create access control list for user, create disk quota, assign file permission, user access control on file and directory using sticky bit and file attribute.
• System performance monitoring and tuning, resolve boot related issues, System audit, resource monitoring, system security and work with several log files.
• Closely work with Oracle DBA team and assist Installation of Oracle RAC.
• Installation and configuration Mariadb, create automated backup script, Logical and Physical recovery.

Linux System Administrator

Confidential

Responsibilities:

• Responsible for various hardware and software acquisitions and implementations.
• Regular administration of servers builds on RHEL 5 and AIX 5.
• Manage data center equipment, work for data center infrastructure development, daily monitoring of datacenter normal lights-on, humidity control, temperature control, raise-floor, datacenter cabling and labeling cable, data center entry log maintenance, scheduling maintenance with hardware, network and software vendor.
• Expertise in Linux system installation, configuration, administration, the development and testing of backup and recovery methodologies, troubleshooting, capacity and performance planning, performance tuning, preventative maintenance, monitoring and alerting setup and security hardening.
• Create and maintain user, password policy, file permission and security.
• Experience in the support of fundamental technologies such as DNS, FTP, SMTP, HTTP, SAMBA and NFS.
• Writing of Shell scripts and scheduling cron jobs.
• Worked with kickstart installation.