Senior Linux Systems Engineer and DevOps Specialist

HUSNAIN KHOKHAR

Linux Systems Engineer

Phone: 516-***-****

*******.*****@*****.***

Professional Summary:

Linux Engineer with 7+ years of hands-on experience in building, testing, and maintaining Linux systems. Expertise of administration and Linux hybrid environment. Hands-on experience in Linux systems, VMware, Ansible, Networking, Bash, Webserver and Automation knowledge. Expert level experience with DevOps Tools as well as good penetration in AWS and managing Linux environments in AWS or large-scale virtualized environment. Expert Level in Linux OS installation, configuration, maintenance and administration; file system maintenance, user maintenance, storage and performance maintenance. Experienced in managing and deploying containerized applications using Docker, Docker Volume. Proficient in orchestrating containerized workloads with Kubernetes, including deployment, scaling, monitoring, and high- availability configurations.

Professional Skills:

Cloud & DevOps

• AWS: IAM, EC2, EFS, S3

Cloud Trail, EBS, EFS,

ELB, Cloud Watch, SG, VPC

• Docker & Kubernetes

• Git & Gitlab

Operating Systems

• Red Hat Enterprise Linux

(RHEL)

• CentOS

• OEL

Networking & Security

• TCP/IP Networking

• Firewall Configuration

• SSH & Secure Access

• Network & OS Troubleshooting

Virtualization & Infrastructure

• VMware ESXi, vSphere, VCenter

• VMotion, vConverter

Storage & File Systems

• LVM, RAID (0, 1, 5, 6, 10)

• File Systems: EXT3, EXT4, XFS

• Storage: DAS, SAN, NAS

• FDISK

• GDISK

Monitoring & Logging

• Nagios Monitoring

• Grafana

Backup, Recovery & Operations

• Incident Management

• Disaster Recovery

Linux Administration

• OS Installation, Configuration,

Troubleshooting

• PXE Boot & Kickstart Automation

• User & Group Administration

• Cron Job Scheduling

• Kernel Tuning & Performance

Optimization

Server & Network Services

• NFS, FTP, TFTP, DNS, HTTPD

(Apache)

Package Management

• YUM & RPM

• Ansible Automation

Ticketing & ITSM Tools

• BMC Remedy

• ServiceNow

• Jira

Scripting & Automation

• Bash Scripting

Support & Operations

• Technical Support

• User Support

Experience

JP Morgan Chase, New Jersey Linux Systems Engineer Apr 2024 – Present

• Deploying, Configuring and Upgrading RHEL / centOS 6.x, 7.x and Ubuntu Operating Systems in Linux hybrid Environment i.e. (physical machines, VMs and cloud).

• Building and configuring Virtual Linux Servers using ESXi and VSphere Client to ensure system scalability, optimization, management, and availability needs.

• Maintaining critical production servers running Linux supporting database and Web services. Providing 24x7 supports

• Providing support services and change management by resolving tickets, incidents and change requests assigned through ServiceNow (SNOW).

• Perform backups using Semantic NetBackup according to company’s standards and used them to restore the Linux servers when needed.

• Used NAGIOS to identify and resolve IT infrastructure problems in various components including Applications, services, servers and network protocols.

• Monitoring systems in particular central processing unit, memory, I/O, RAID, and network parameters using the tool Grafana and Prometheus monitoring system.

• Remediate and implement future proofing measures, leading to a sharp reduction in recurrence of future incidents by conducting Root Cause Analysis (RCA).

• Providing input to security relevant documentation such as Policies and Procedure and Security Control Documentation.

• Worked with Ansible in my environment for Orchestration, Automation, App deployment, and Configuration management. Manage Multiple Nodes and inventory for different Environments by utilizing the Ansible Tower.

• Expert in branching, tagging and maintaining the versions through the environments via version control tools like GIT.

• Creating Docker images using Docker file, worked on Docker container snapshots, managing Docker compose and Docker volume.

• Providing full coverage for Linux or Windows system administration functions to support the DevOps tool sets.

• Used Amazon Virtual Private Cloud (VPC) as a virtual network environment for AWS resources and services.

• Incorporating AWS native cloud services and features to enhance the performance and resilience of the DevOps tools and infrastructure.

• Created EC2 instances with various AMI's and Configured Applications on the instances.

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

• Installing, configuring, supporting, and maintaining middleware (e.g., Apache, Tomcat, Windows Servers etc.) to support the DevOps tool sets. Verizon Communications, Dallas TX Linux Systems Administrator Aug 2020 – Mar 2024

• Deployed, configured and administered the RHEL 6/7 and CentOS 6/7 on physical servers and bare metal.

• Managed full lifecycles of servers i.e. deployed, provisioned, troubleshot, maintained and decommissioned.

• Monitored, analyzed, and optimized the virtualization performance of ESXi hosts and virtual machines.

• Experience of transfer of files across networks using protocols like SCP, SFTP and FTP. Also managed TCP and UDP protocols.

• Kept the servers up and running as well as provided direct application and user support for any technical issues related to Linux systems.

• Expert level experience in change management and incident management.

• Proficiently managed file system and implemented patching, upgrading, vulnerability/ security management.

• Used bash scripting for managing administrative tasks daily routine tasks.

• Configured NFS server for sharing of files and used NFS for storage management purpose.

• Managed resources such as space by deploying and creating Logical Volumes, resizing logical volumes and volume groups. Also created various file systems EXT3, EXT4 and XFS.

• Created and pushing SSH keys to configure password-less SSH for security and automation purposes.

• Configuring NIC-bonding on new machines for fault-tolerance, load-balance, and redundancy.

• Monitored the performance of the system using top, sar, vmstat, netstat and iostat to check the CPU utilization, bottlenecks of I/O devices, memory usage and network traffic.

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

• Providing ongoing systems administration, technical support, upgrades, and troubleshooting services.

• Worked with daily system monitoring, verify the integrity and availability of all hardware and server resources, and review system and application logs.

• Worked on virtual and physical Linux hosts and involved in day to day administrative activities such as maintaining user accounts, password management, providing advance file permissions to specific users, etc.

• Schedule jobs and executed scripts for system backup, updates, automate server maintenance Utilized cron.

Allergans, New Jersey Jr. Linux System Administrator Aug 2018 - Jul 2020

• Responsible for complete user management. Creating/ modifying users and groups as requested.

• Installed and configured wireless networking equipment, network software, including security or firewall software, ensuring integration with existing network systems.

• Created and pushing SSH keys to configure password-less SSH for security and automation purposes.

• Using network tools like ping, traceroute, tcpdump, to capture packets and analyzing them for resolving network issues.

• Assisted in maintaining systems in lab environments at various sites.

• Monitored System performance such as CPU, Memory, Disk usage.

• Creating backups, moving and restoring using gzip and tar ball.

• Proactively Handled tickets that involved troubleshooting equipment hardware issues.

• Provided Tier 1 (Help Desk) problem identification and Tier 3 (Watch Desk) support during normal to semi-critical situations.

• Participate in an on-call rotation for support of systems outside of normal business hours.

Education & Certification

Bachelor’s degree in Computer Science.

Red Hat Certified System Administrator (RHCSA)

Status

US CITIZEN

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