Omar Nadeem
New York City,NY
Summary
Results-driven Senior Linux Systems Administrator with over5 years of experience in optimizing and managing virtualized environments using VMware, with a focus on cluster management and seamless server migrations. Expertise in server provisioning, performance monitoring, and kernel tuning, consistently maximizing system efficiency. Skilled in leveraging Ansible for effective configuration management in large-scale environments, ensuring scalable and robust infrastructure. Proficient with DevOps tools, including Docker and Git, and experienced in utilizing AWS services for comprehensive cloud solutions. Passionate about adopting emerging technologies and implementing best practices to enhance operational excellence.
Overview
5
5
years of professional experience
Work History
Linux System Engineer
Arista Networks
07.2024 - Current
- Implemented Git for version control, maintaining a centralized repository for efficient code management and streamlined releases
- Worked on diverse production projects, enhancing system reliability and performance through precise management of resources and configurations
- Utilized various monitoring tools such as Nagios, Prometheus, and Grafana to ensure optimal system performance and proactively address issues
- Proficient in leveraging Ansible for configuration management, automation of system tasks, and streamlined upgrades of application servers
- Developed shell scripts for task automation and system management, improving efficiency and reducing manual intervention
- Successfully executed migration and management of critical production systems to RHEL9, leveraging new features for improved performance and security
- Managed and orchestrated containerized applications using Docker and Kubernetes, optimizing deployment processes and resource utilization
- Expertise in troubleshooting networking issues and implementing solutions to maintain system connectivity and performance
- Skilled in user management practices, ensuring proper access controls and permissions are maintained across Linux environments
- Expertise in utilizing log data for precise analysis and optimization, fine-tuning the performance of Linux servers to achieve peak efficiency
- Collaborated with cross-functional teams to support network operations and enhance operational workflows using tools like JIRA for incident tracking and project management
- Developed and maintained comprehensive documentation for system configurations, processes, and troubleshooting guides using Confluence and Markdown, facilitating knowledge sharing within the team
- Proactively addressed and resolved CPU, RAM, I/O, and network performance issues to maintain system efficiency and availability
- Skilled in security management practices, implementing SELinux, iptables, and Fail2Ban to protect sensitive data and maintain system integrity
- Experienced in patch management, regularly applying security updates and software patches to mitigate vulnerabilities and ensure compliance with organizational policies
- Skilled in performance tuning by optimizing system parameters, configuring kernel settings, and adjusting service limits to ensure optimal server responsiveness and resource utilization
- Experienced in executing Ansible playbooks for automated deployment and configuration of application environments, ensuring consistency and repeatability across systems
SR. LINUX SYSTEMS ADMIN
Samsung
11.2021 - 06.2024
- Analyzed log data to optimize ESXi hosts, enhancing system performance and reliability
- Configured vCenter for secure, efficient Linux server management, improving operational control
- Refined virtual machine performance, achieving measurable efficiency gains
- Resolved complex server issues, ensuring seamless IT operations and minimal downtime
- Streamline support processes with Ansible, reducing configuration time and boosting system reliability across the infrastructure
- Configure advanced RAID levels and implement LVM for robust data protection and dynamic storage management optimization
- Orchestrate AWS EC2 deployments, configure security groups, and implement CloudWatch for proactive application health monitoring
- Optimize ESXi hosts through log data analysis, enhancing system performance and reliability while configuring vCenter for secure Linux server management
- Successfully executed a smooth migration from RHEL7 to RHEL8 for critical production servers, leveraging the efficiency of the Leapp utility
- Expert in Git for code management, maintaining a centralized GitLab repository for efficient code releases
- Proactively addressed and rectified CPU, RAM, I/O, and network performance issues to sustain system efficiency
- Demonstrated expertise in employing LVM for dynamic storage manipulation, including creation, extension, and reduction, ensuring optimal file system management
- Enhancing security and restricting user access by defining IAM policies, ACLs, security groups, and roles
- Utilized Jira for tracking incidents, managing user requests, and responding promptly to alerts
- Worked with Nagios for proactive server performance monitoring, detecting and addressing issues to ensure optimal system health
- Expertise in Active Directory services, efficiently adding new users and managing their access through strategic use of group policies
- Configured Network File System (NFS) to facilitate seamless sharing of files and directories over networks, ensuring efficient access for clients
JR. LINUX ADMIN
MERCK
11.2019 - 10.2021
- Provided crucial support to Linux admins and engineers, contributing to the smooth execution of tasks and enhancing overall operational efficiency
- Specialized in troubleshooting techniques to ensure maximum system uptime, adeptly identifying and resolving issues for sustained operational efficiency
- Effectively managed system performance using SAR, Netstat, Vmstat, Top, and Iostat, taking swift corrective measures for optimal functionality
- Skilled in creating and managing journaling file systems, resizing, and performing health checks for robust filesystem performance
- Enhanced Linux security by adding ports and services to the firewall via the command line
- Implemented precise kernel tuning to meet the unique architecture demands of the application team
- Excellent in storage management, with proficiency in disk management, Logical Volume Management (LVM), and strategic logical partitioning
- Configured NIC teaming for active backup and load balancing, optimizing network reliability and high-speed traffic flow
- Expert in managing and troubleshooting network traffic using CLI tools such as tcpdump, ifconfig, netstat, traceroute, nslookup, and ping, with expertise in packet analysis through Wireshark
- Efficiently scheduled backups and various jobs on servers using Crontab commands for streamlined task execution
- Employed the TAR utility to compress packages, files, and folders, skillfully optimizing storage space for increased efficiency
- Generated passwordless authentication keys via ssh-keygen, ensuring secure connections by sharing public keys for a password-free authentication process
Education
MASTERS IN TECHNOLOGICAL SYSTEMS MANAGEMENT -
Stony Brook University
BACHELORS IN TECHNOLOGICAL SYSTEMS MANAGEMENT -
Stony Brook University
01.2023
BACHELORS IN ECONOMICS - undefined
Stony Brook University
01.2023
Skills
- Linux, VMware, Ansible, AWS, Docker, Git, RHEL, CentOS, OEL, LVM, RAID, Kubernetes, Nagios, Apache, DNS, SAMBA, NFS, FTP, TFTP, EC2, vMotion, vCenter, vSphere, ILO, iDRAC, System Monitoring, File System Management, Network Optimization, Security Management, Troubleshooting, Performance Tuning, Backup Solutions, Virtual Networking, User Management, Shell Scripting, System Reliability, Performance Analysis, Server Migration, Performance Monitoring, System Optimization, Virtualization Management, Monitoring Tools, Network Security, Compliance Management, Patch Management, Network Configuration, System Auditing
Timeline
Linux System Engineer
Arista Networks
07.2024 - Current
SR. LINUX SYSTEMS ADMIN
Samsung
11.2021 - 06.2024
JR. LINUX ADMIN
MERCK
11.2019 - 10.2021
BACHELORS IN ECONOMICS - undefined
Stony Brook University
MASTERS IN TECHNOLOGICAL SYSTEMS MANAGEMENT -
Stony Brook University
BACHELORS IN TECHNOLOGICAL SYSTEMS MANAGEMENT -
Stony Brook University