Israr Ahammad Shaik

Senior system administrator with 10 years of experience managing complex enterprise IT infrastructures. Expert in Active Directory, Sophos, Palo Alto firewalls, VLAN and VPN deployment to ensure secure, scalable network environments. Proven ability to reduce security incidents and optimize network performance across LAN/WAN environments. Adept at driving operational excellence and continuous improvement in dynamic technology settings.

Senior System Administrator - Qube Cinema Technologies Pvt Ltd - Chennai, Tamilnadu, India

(2015-10)

Progression through roles: Tech Support Engineer → System Administrator → Senior System Administrator

• Administer Windows Server 2016, 2019, and 2022 environments, including installation, configuration, maintenance, and performance optimization.
• Administer Microsoft Entra ID (formerly Azure Active Directory), including user and group management, identity and access management, authentication, and security policies.
• Manage Microsoft Exchange and Microsoft 365 environments, including mailbox administration, user provisioning, distribution groups, licensing, mail flow, and security configuration.
• Manage Active Directory, DNS, DHCP, Group Policy, IIS, FTP, and other Windows Server services to ensure secure and reliable infrastructure operations.
• Configure, administer, and maintain Sophos and Palo Alto firewalls, implementing security policies, NAT, Intrusion Prevention System (IPS), content filtering, and application control.
• Configure and manage Netgear switches, ensuring optimal network performance, high availability, and reliable connectivity.
• Optimize LAN/WAN infrastructure by implementing VLANs and Port-Channels to improve network segmentation, scalability, and performance.
• Deploy and manage site-to-site and remote access VPNs, providing secure connectivity for remote users and branch offices.
• Monitor, troubleshoot, and resolve network performance, security, and connectivity issues across LAN, WAN, and WLAN environments.
• Implement and manage server backup and recovery solutions using Acronis True Image to support business continuity and disaster recovery.
• Oversee the maintenance of CCTV surveillance systems and biometric access control devices.
• Provide remote and onsite technical support for Windows systems, Linux and macOS environments.
• Troubleshoot operating systems, Microsoft Office, Outlook, Microsoft 365, antivirus software, hardware, printers, and peripheral devices, delivering timely remote and onsite support.
• Install, configure, maintain, and upgrade desktops, laptops, printers, and other endpoint devices to ensure uninterrupted end-user productivity.

Diploma - Computer Engineering - GOVT. Polytechnic For Minorities, Kurnool, A.P. (2008 - 2011)

S.S.C. - Govt. High School, Atmakur, Nellore, A.P (2008)