Staten Island, New York, United States
Linux Systems administrator with +6 years of experience in IT. Primarily managing OEL, CentOS, RHEL, environments and delivering on key tasks aligned with company goals. Proficient in using Ansible, GitHub, and Bash scripting for automation and infrastructure improvements. Managing Source Code and implementing version control using BitBucket and Git lab. Experienced in spinning up of EC2 instances and managing storage with S3, EBS, EFS for enhanced availability. Strong skills in managing SAN storage, LVM, RAID, and file systems such as Ext3, Ext4, and XFS, with a solid focus on security tools, vulnerability management, and troubleshooting. Well-versed in virtualization platforms like VMware and ticket handling with SNOW and Jira and experience of monitoring applications, network with Splunk and Senso monitoring tools.
Automated routine tasks and Linux server provisioning using Ansible, including services, file, user management, system configuration, and patch management across OEL, CentOS, and RHEL systems. Conducted performance tuning and troubleshooting of Linux systems, ensured stability and responsiveness for production environments. Deployed and maintained virtualized Linux environments using VMware vSphere, including ESXi hosts and virtual machines for various production workloads. Optimized memory and CPU usage by fine-tuning Linux performance parameters, improving system responsiveness, setting resource limits, kernel tuning and provided stability for resource-intensive applications. Automated application and infrastructure monitoring solutions using Prometheus, Grafana, and Nagios to proactively detect and resolve performance bottlenecks on Linux systems. Configured and optimized AWS services such as EC2, VPC, S3, RDS, and Route 53 for scalable and resilient cloud architecture, with a focus on Linux-based instances. Worked on optimizing auto-scaling and load balancing solutions in AWS for Linux-based applications to ensure high availability and cost-efficient cloud resource management. Utilized Git for source control management, collaborating with teams to maintain code integrity and version history for repositories in Linux environments. Leveraged Docker to containerize applications, enabling seamless deployment and scaling across Linux environments Performed thorough testing and validation of OS patches in staging environments before deploying to production, ensuring minimal downtime and impact on critical systems. Configured SNMP (Simple Network Management Protocol) for network monitoring, providing real-time insights into network device status and performance. Supported virtualization infrastructure by managing virtual machine templates, cloning VMs, and overseeing resource allocation to ensure optimal performance.
Installed VMware ESXi, ensuring efficient resource utilization by configuring and managing virtual machines (VMs) and optimizing hypervisor performance for high availability. Configured and managed Logical Volume Manager (LVM) on Red Hat Enterprise Linux (RHEL) systems, implementing advanced storage management techniques to expand and shrink logical volumes dynamically. Automated software deployment and updates using YUM and RPM package managers, streamlining the installation and maintenance process across multiple Linux servers. Administered user account management, including creating, modifying, and removing user accounts, groups, and access privileges, ensuring system security through controlled user access policies. Managed core Linux services, including DHCP, DNS, NFS, and Samba, ensuring seamless file sharing, network services, and remote resource access within complex enterprise environments. Orchestrated server patching and maintenance, applying security updates and software patches to ensure compliance and minimize vulnerabilities across Red Hat Linux infrastructure. Implemented backup and disaster recovery strategies for Linux-based cloud infrastructure, leveraging AWS S3, RDS snapshots, and EBS volume backups. Managed and monitored AWS services using CloudWatch, creating custom metrics and alerts for Linux-based EC2 instances to ensure optimal system performance and availability. Performed physical-to-virtual (P2V) server migrations, utilizing VMware tools to convert physical machines to virtual instances, and executed virtual machine live migrations using vMotion for minimal downtime. Optimized system scheduling and automation by creating, modifying, and managing cron jobs, automating recurring tasks and maintenance activities across Unix/Linux systems. Conducted in-depth system administration and troubleshooted issues related to NFS file sharing
Administered user accounts by efficiently managing user lifecycle operations, including manual account creation, password resets, and account terminations, ensuring secure access control. Conducted routine server health checks, proactively identifying and resolving system anomalies to maintain high availability and performance across multiple platforms. Completed system resource upgrades by increasing memory, disk space, and swap partitions to meet evolving application demands, boosting server performance and capacity. Implemented regular file archival and clean-up processes, adhering to corporate retention policies, which contributed to optimized storage use and system efficiency. Customized CPU, memory, and disk partition configurations to align with operational requirements, improving workload distribution and overall system throughput. Developed technical documentation for complex troubleshooting procedures, provisioning processes, and configuration guidelines, enriching the internal knowledge base. Enabled secure, password-less access using SSH key pairs, enhancing user authentication security and reducing time spent on manual login processes. Troubleshot and resolved SSH-related issues, ensuring reliable and secure connections for system administrators and end users. Established a local YUM repository, streamlining package deployment processes, which reduced update and installation times across servers