WAQAS GILL

Linux System Engineer

516-***-**** adkq9c@r.postjobfree.com

Linux System Engineer

A tested professional Linux System Engineer with a resolute technical background and having 6+ years of experience in designing, implementing, and managing Linux servers. Experience involves deploying, configuring, installing, patching, maintaining Linux based servers in a production life cycle. Strong ability to fix complex problems, adaptive to dynamic environment, capable of troubleshoot system related issues and adapt to evolving circumstances. Excellent communication, interpersonal and analytical skills; Possess ability to collaborating in a team environment and achieve company established goals and in dealing with high-level tasks. Working acquaintance and experience with VMware, AWS, DOCKER, Kubernetes, Git, and automation tools such as Ansible and bash scripting.

SKILLS

Linux Red Hat CentOS NFS Apache DNS FTP TFTP DHCP TCP/IP ACL partition LVM RAID Ansible Ansible Tower AWS (EC2, ELB, EBS, IAM, VPC, RDS, S3, Glacier) PXE VMWare ESXi vSphere VCenter Git Jenkins Docker Kubernetes Bash Scripting Patching

CORE COMPETENCIES

LINUX Administration

File Management

Storage Management

Cloud Computing

Troubleshooting

Monitoring

Networking

Performance Optimization

Console Management

Service Now

Red Hat Satellite

Bash Scripting

VMWare/VCenter/vSphere

Communications

OSI layers

LVM

AWS

CI/CD

Jenkins

Docker

Kubernetes

Git

Ansible

Ansible Tower

PROFESSIONAL EXPERIENCE

Citi Bank – Dallas, TX January 2018 – Present

Linux System Engineer

Administration & Management of whole life cycle of Linux systems.

Responsible for providing technical support, tracking & solving technical issues related to daily system administration, operations, repair and monitoring for multiple large-scale Linux-based platforms in complex operational support system.

Responsible for investigation, diagnosis and resolution of systems hardware, software, and infrastructure issues.

Providing daily system maintenance and monitoring for Physical and Linux Private Cloud Infrastructure by performing system monitoring and analysis and performance tuning.

Solidified servers and tuned system for better performance by altering kernel parameters (kernel tuning).

Change management and working on different Service Now Demands.

Creating and working with Dashboards, Reports, visualizations, and Alerts in Splunk.

Built and managing profoundly accessible monitoring infrastructure to monitor different application servers, and its components using Nagios.

Responsible for User Management, File Management and Disk Management.

Responsible for configuration and maintenance of common Linux services such as Apache HTTPD, SMTP, DHCP, NFS, FTP, LDAP, DNS, SSH.

Using Ansible as configuration management tool, for automating repetitive tasks, to quickly deploy critical applications, and proactively manage change and used Ansible Tower to manage and configure nodes.

Performing patching on numerous Linux based servers through ansible and Red Hat Satellite to address security vulnerabilities.

Performed configuration management tasks with Ansible, using Ansible ad-hoc commands, writing playbooks, use of Ansible roles for reusability purposes.

Extensive use & Excellent knowledge on version control systems like GIT and used Source Code Management (SCM) tools like GitHub, Git LAB.

Created AWS Launch configurations based on customized AMI and Implemented AWS solutions using EC2, S3, RDS, EBS, Elastic Load Balancer, Auto scaling groups.

Installed application on AWS EC2 instances and Created monitors, alarms, and notifications for EC2 hosts using Cloud Watch.

Created, used, and managed S3 buckets, managing policies and Utilizing S3 bucket and Glacier for storage and backup on AWS.

Deep knowledge/Operations on Docker and Kubernetes and CI/CD, Jenkins.

Experience with container-based deployments using Docker, working with Docker images, Docker Hub and Docker registries.

On high scalable environment used Docker coupled with load balancing Nginx to achieve continues delivery goals.

Managing Docker Orchestration and Docker containerization using Kubernetes.

Managed Kubernetes charts and Created reproducible builds of the Kubernetes applications, managed Kubernetes manifest files.

Have some basic knowledge of python

Documentation experience with Confluence pages, SharePoint, and MS Teams.

Dow Chemical, Bay City, MI April 2016 – Oct 2017

Linux Administrator

Responsible for Installation, Provisioning, Configuration, Tuning and Upgrade of Linux RedHat and Centos Servers in virtual, cloud and bare metal.

Excellent in configuring PXE Boot with Kickstart servers to initiate installation of RHEL (Red Hat)/ CentOS 6, 7.

Experience in virtualized environment with VMware and installed ESXi hypervisor on bare-metal servers.

Constructed ESXi hosts, managed vCenter, and new VM’s.

Excellent experience in installing and managing YUM and RPM Packages.

Used Volume Manager tools, LVM, to create and manage logical volumes, volume groups and file systems, extending and reducing filesystems.

Expose to AWS environment and use services such as EC2, EBS, S3, and IAM.

Created Ansible playbooks for application deployment, configuration management and system hardening.

Used Ansible, roles, handlers, Tags, Ad-hoc commands as well as inventory files.

Backup Scheduling using the full and incremental backups on tapes and on external storages using rsync, scp, tar.

Enhanced security in the environment by configuring firewalls, opening specific ports, applying security patches and routing password changes.

Configured various network services - DNS, LDAP, DHCP, NFS, NIS, Apache, Samba, SSH, FTP, Telnet, HTTP, HTTPS

Experience and better understanding of OSI Model, TCP/IP protocol suite (TCP, UDP, SMTP and FTP).

Respond tickets and incidents on daily bases, also created change management tickets to replace parts on bare-metal servers with vendor.

Configured RAID (0, 1, 5 & 6) for multiple Red Hat Linux Servers for increased performance and redundancy.

Implemented performance capabilities and experience in load balancing and monitoring with Nagios.

For monitoring host resources such as processor load, disk usage, system logs, monitoring applications, services, and network protocols, used Nagios as IT infrastructure monitoring tool.

Used ILO/iDRAC for remote access of servers and troubleshooting system or hardware related issues.

Experienced in providing root cause analysis for system performance, tuning, maintenance.

Wrote Shell Scripts to automate repetitive tasks, manages user account information, including rights, security, and systems groups.

Sirius Group, NYC, NY Sep 2014 – February 2016

Linux Support Technician

Responsible for Installation, configuration, troubleshooting and maintenance of Red Hat Linux Servers in accordance with Policy Compliance Management requirements.

Performed User Management, permitted and modified user ownership and permissions and resolved user-related issue i.e., creating & resolving User Access issues.

Implementing SUDO utility throughout the production environment and enforcing no root access.

Provided live customer support and VPN remote Support and troubleshooting, ticketing with Service Now.

Worked closely with various IT groups including but not limited to project management, database administration, network and security teams, application teams assisting in the overall architectural design.

Assisted in the evaluation and implementation of new technologies to optimize the Linux operating system environment.

Maintained server operations, processes and procedures, service and operational level agreements reporting compliance and server build requirements as needed.

Provided support monitoring performance, problem identification and resolution.

Experienced in server builds and automating the provision of OS by using Kickstart.

Experience in building and configuring VMware ESXI Infrastructure and creation and managing of Virtual Machines on VMware VCenter.

Troubleshoot network connectivity issues including digital authentication, remote access and wired connectivity to the internal network.

Scanned hosts for vulnerabilities and fix them through timely patches.

Developed Cronjobs to automate and schedule daily tasks.

Performed Rack and Stack on a scheduled basis.

Wrote and edited technical documentation on Enterprise Wiki Server.

EDUCATION

Bachelor’s in arts- University of Gujrat 2011

Attended CORVIT Training institute in 2012

Linux Open-Source OS Fundamentals

Linux System Administration I, II

Introduction to VMWare Virtualization

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