Linux Systems Engineer with DevOps Focus

Boshra Saleh Kassem

Linux Engineer

(***) ***- **51 **************@*****.*** US Citizen

PROFESSIONAL SUMMARY:

An accomplished Linux Systems Engineer with over 5 years of specialized expertise in the installation, configuration, patching, and maintenance of Linux-based operating systems. Demonstrates advanced capabilities in troubleshooting complex system issues, incident management, and executing change management processes to maintain infrastructure integrity. Highly skilled in employing DevOps tools such as Ansible, Git, and AWS to drive automation, streamline configuration management, and enhance operational efficiency. Possesses deep technical knowledge of containerization platforms, including Docker and Kubernetes, ensuring the deployment of scalable, resilient, and optimized cloud-native environments. Proficient in kernel tuning, performance optimization, and backup strategies, with a strong emphasis on ensuring system hardening and network security.

SKILL SET:

Administration:Provisioning, Patching, Decommissioning, Package Management

(RPM), User Management, File Management.

Networking & Protocols: Ping, TCP/IP, tcpdump, Route 53, DNS, Traceroute, LDAP, HTTP, Apache, SSH

Cloud Computing:AWS Cloud - EC2, EBS, ELB, EFS, S3, IAM, Autoscaling, Load Balancer, Cloud Watch

DevOps Tools Ansible, Ansible Tower, GitLab, GitHub, Docker, Kubernetes VMware (ESXI, VCenter, Vconverter, Vmotion)

Scripting:Bash Scripting

Monitoring: Nagios, Grafana, Zabbix, Splunk, Service Now, JIRA, BMC Remedy Storage Management:LVM, RAID, Gdisk, Fdisk, Ext4, XFS, FAT Hardware:HP, DELL

CERTIFICATIONS: (RHCSA) RedHat Certified System Administrator Feb 2026-Feb-2029 EXPERIENCE

Walmart, Bentonville Arkansas Jan 2024 – Present

Linux Engineer

● Proficient in deploying and configuring Red Hat Enterprise Linux (RHEL 6, 7, 8, 9) servers utilizing Red Hat Satellite, ensuring efficient, scalable, and secure deployments across production environments.

● Extensive experience in managing VMware environments, specializing in High Availability (HA), Distributed Resource Scheduler (DRS), and VMotion for smooth virtual machine migrations, load balancing, and performance optimization.

● Orchestrated the deployment and management of virtual machines within VMware clusters, ensuring consistent high availability, performance, and fault tolerance in Linux-based virtual environments.

● Actively monitored system health and infrastructure performance using Prometheus, ensuring efficient resource utilization and workload stability.

● Ensured system resilience by minimizing downtime, enhancing outage recovery processes, and implementing fault-tolerant architecture solutions for critical infrastructure.

● Utilized Ansible for comprehensive automation, application deployment, and configuration management, significantly reducing manual intervention and operational overhead across Linux server fleets.

● Engineered advanced Ansible playbooks to automate routine administrative tasks, utilizing ad-hoc commands to optimize daily operations and enhance system management efficiency.

● Tuned Linux system performance by adjusting kernel parameters and optimizing process scheduling, significantly improving system efficiency in virtualized and cloud environments.

● Conducted proactive system maintenance and monitoring of physical infrastructure and Linux private cloud environments, ensuring high system integrity, performance, and uptime.

● Developed and maintained Git workflows, handled metadata management, and executed branch merges to support continuous integration and delivery (CI/CD) pipelines, ensuring code integrity across multiple environments.

● Expert in Git version control, proficient in advanced commands such as "git merge" for smooth branch integration and "git rebase" to maintain clean, linear commit histories.

● Hands-on experience with a wide range of AWS services, including EC2, IAM, VPC, Subnets, CloudFormation, S3, CloudWatch, and Route 53, to design, deploy, and manage highly available, scalable, and fault-tolerant infrastructure.

● Deployed and monitored scalable cloud infrastructure on AWS, with a focus on managing EC2 instances and optimizing resource allocation for maximum performance and reliability.

● Managed IT service operations through BMC Remedy, resolving incidents and managing service tickets with high efficiency and adherence to SLAs.

● Administered Docker container environments, managing image repositories, orchestrating container deployment, and ensuring secure distribution across multiple environments.

● Applied critical security patches to Linux systems, applications, and network devices, ensuring compliance with security policies and minimizing exposure to vulnerabilities.

● Orchestrated Kubernetes clusters, managing pods, implementing advanced deployment strategies, and optimizing service management for high-performance, load-balanced workloads.

● Expertise in Linux network administration, adept at troubleshooting complex TCP/IP networking issues and resolving intricate connectivity problems to maintain robust, high-performance networks. BNY Mellon, NYC, NY Dec 2021 – Nov 2023

Linux Admin

● Proficiently executed the deployment, administration, and troubleshooting of Linux servers, ensuring efficient operation and high availability across both production and development environments.

● Managed on-call rotations to rapidly address and resolve system issues, including patching, upgrades, and server rebuilds, minimizing downtime and operational disruptions.

● Expert in Linux user management, configuring file and directory permissions and enforcing strict user/group access controls to ensure system security and compliance with organizational policies.

● Proactively monitored and analyzed system logs using rsyslog, effectively identifying and mitigating potential issues to maintain optimal system reliability and performance.

● Administered enterprise-grade remote management tools such as iLO and iDRAC, ensuring secure, efficient, and uninterrupted remote server operations across multiple data centers.

● Configured and optimized critical Linux network services including NIS/NFS, SSH, DHCP, and TCP/IP, contributing to enhanced network performance and overall infrastructure reliability.

● Engineered NFS export configurations to streamline file-sharing processes and resource management, resulting in improved operational efficiency and cross-functional team collaboration.

● Designed and implemented strong backup strategies, employing automated backup solutions and fast recovery procedures to safeguard mission-critical data and ensure business continuity.

● Automated system maintenance tasks by scripting cron jobs, significantly improving resource allocation and system efficiency through reduced manual intervention.

● Utilized ServiceNow for efficient incident and change management, leading to reduced system downtime and enhanced service delivery via structured and expedited issue resolution workflows.

● Strengthened system security by deploying advanced OpenSSH configurations, hardening remote server environments to mitigate vulnerabilities and bolster overall security posture.

● Diagnosed and resolved complex hardware and software issues, ensuring high availability and uptime for mission-critical Linux systems in demanding production environments.

● Designed and optimized storage solutions using various RAID configurations to enhance performance, redundancy, and efficiency based on workload demands.

● Implemented network interface bonding and teaming to increase bandwidth and ensure network redundancy, tailoring configurations to meet application-specific requirements.

● Collaborated directly with clients to resolve complex tickets, providing precise solutions for functionality issues, bug fixes, and system customizations.

● Specialized in middleware management, installing, upgrading, and maintaining services such as Apache and MySQL to ensure optimal system performance and stability.

● Led software and package management using RPM and YUM, including maintaining the YUM repository server to streamline patch management and software deployment.

● Configured network adapters and IP assignments to troubleshoot and resolve network issues, ensuring maximum connectivity and performance.

● Directed server migrations P2V and V2V to optimize resource allocation and improve system performance in both virtualized and physical environments.

● Configured scalable storage solutions utilizing LVM and fdisk, alongside partitioning techniques to meet expanding data storage requirements.

● Managed diverse file systems, including EXT3, EXT4, and XFS, ensuring optimal data integrity, performance, and support for operational workloads.

● Secured network environments using advanced security mechanisms such as iptables, firewalls, and SELinux, effectively protecting systems from external and internal threats. Apple Raleigh North Carolina Nov 2020 – Oct 2021

Data Center Technician

● Monitored critical hardware components, applications, and key system processes to ensure optimal performance and early issue detection.

● Optimized memory utilization by expertly managing swap space, enhancing system performance through fine-tuned resource allocation.

● Provided comprehensive onsite support for IT infrastructure, including PC setup and configuration, network troubleshooting, hardware diagnostics, and printer management.

● Resolved high-priority incidents and tickets efficiently during on-call shifts, adhering to Standard Operating Procedures (SOPs) and ensuring timely resolution in compliance with SLA targets.

● Administered data backup processes, utilizing gzip and tarball for efficient file compression and transfer across system

● Resolved Wi-Fi connectivity issues, implementing secure configurations to optimize network performance and improve user experience.

● Utilized advanced command-line tools (top, vmstat, iostat, netstat, mpstat, ps) to monitor and analyze system performance, ensuring optimal operational efficiency.

● Led secure data decommissioning and service shutdown procedures, ensuring regulatory compliance and adherence to audit standards.

EDUCATION:

College: Central Connecticut State University - Bachelors in Computer Information Technology - Expected graduation date 2027

High School: New Britain High school - 2019

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