. Administered and maintained Red Hat Enterprise Linux (RHEL), CentOS, Unix (Solaris), and Windows server environments, upgrading, troubleshooting, and performing tunes to ensure high availability and performance across all systems.. Led a team of five admins to develop and maintain automation patches and scripts using Ansible Playbooks, PowerShell, and Bash to streamline system management and administrative tasks, reducing manual intervention by 40%.. Supported application and web… Show more . Administered and maintained Red Hat Enterprise Linux (RHEL), CentOS, Unix (Solaris), and Windows server environments, upgrading, troubleshooting, and performing tunes to ensure high availability and performance across all systems.. Led a team of five admins to develop and maintain automation patches and scripts using Ansible Playbooks, PowerShell, and Bash to streamline system management and administrative tasks, reducing manual intervention by 40%.. Supported application and web server technologies such as Apache and Nginx, including troubleshooting web-based applications and deploying websites.. Optimized MySQL, MariaDB, and PostgreSQL databases for performance, scalability, and reliability by tuning queries, indexes, and configuration parameters.. Monitored performance and system logs, including Splunk and Nagios, ensuring real-time monitoring of server and network environment, resulting in a 30% improvement in performance and client satisfaction.. Managed and optimized file systems across Linux and Windows environments, including NFS, SMB, and ZFS, ensuring efficient storage and data access. Configured and troubleshoot network services, including TCP/IP, DNS, DHCP, VLANs, and firewall management, collaborating closely with network engineers to enhance network performance and reliability.. Designed and implemented Windows-based solutions that enhance security and system performance, leveraging Active Directory and Group Policy management expertise.. Administrated AWS cloud infrastructure including EC2 instances, S3 buckets, IAM policies, and VPC configurations to ensure high availability and optimal performance.. Led the development of a script to perform full and incremental backup using rsync, participated in root-cause analysis of recurring issues, and set up security while providing 24/7 support in production and development environments. Show less