Saifur R

Officer (System Administrator)

Banks • Vollzeit

Mar 2019 - Present • 7 yrs 2 mos

1. Manage virtualization platforms, including VMware vSphere, vCenter, Hyper-V, and Hyperconverged Infrastructure (HCI), ensuring high availability and performance. 2. Deploy, configure, and maintain Linux servers (Red Hat, CentOS, Oracle Linux, Rocky Linux, Ubuntu) across production, staging, and development environments. 3. Experience implementing and managing Windows Server, Windows Active Directory and Windows Desktop infrastructures in mission-critical enterprise environments. 4. Windows Active Directory, AD DS, Group Policy, Domain Controllers, User & Access Management, Authentication, Authorization. 5. Monitor system performance, analyze logs, and perform performance tuning to ensure uptime, reliability, and optimal resource utilization. 6. Configure and administer storage systems, backups, and disaster recovery strategies to protect critical enterprise data. 7. Troubleshoot hardware, OS, and application-level issues, reducing downtime and maintaining service continuity. 8. Implement and enforce system security policies, including SSH management, user access control, patch management, and server hardening. 9. Plan and execute system upgrades, patches, and migrations with minimal disruption to business operations. 10. Automate routine administrative tasks using shell scripting and other automation tools to improve operational efficiency. 11. Resolve web server and application issues on Apache HTTP, Tomcat, Nginx, and IIS platforms. 12. Harden Linux and Windows servers in compliance with PCI-DSS-v4.01, ISO 27001:2013, and other regulatory standards. 13. Optimize critical infrastructure components to enhance performance, scalability, and reliability. 14. Conduct vulnerability assessments, mitigate risks, and enforce security best practices across servers and networked systems.