Walk-in || Network Admin & System Adminstrator (Chennai)

Role & responsibilities Network Architecture & Administration - Design, deploy, and maintain highly available enterprise LAN, WAN, WLAN, and SD-WAN networks. - Configure, manage, and support enterprise networking devices, including routers, switches, firewalls, and wireless access points. - Implement and optimize routing and switching technologies such as OSPF, BGP, EIGRP, VLANs, STP, trunking, QoS, and IPv4/IPv6 subnetting. - Monitor network performance, conduct capacity planning, and optimize bandwidth utilization. - Manage ISP connectivity, site-to-site VPNs, and remote-access VPN solutions to ensure secure and reliable connectivity. - Utilize network monitoring and troubleshooting tools such as SolarWinds, PRTG, Wireshark, and Datadog. System Administration & Virtualization - Install, configure, administer, and maintain Windows Server and Linux environments. - Manage core infrastructure services including Active Directory (AD), Group Policy (GPO), DNS, DHCP, and File Servers. - Deploy, administer, and optimize virtualization platforms using VMware vSphere/ESXi or Microsoft Hyper-V. - Plan, implement, and execute Disaster Recovery (DR) strategies and business continuity procedures. Security & Compliance - Configure and manage enterprise security solutions, including Fortinet, Cisco Firepower, SonicWall firewalls, IDS, and IPS. - Perform vulnerability assessments, system audits, and support penetration testing activities. - Implement Zero Trust Network Access (ZTNA), Network Access Control (NAC), and endpoint security solutions. - Develop and manage patch management processes for servers, network devices, firmware, and applications. - Respond to critical security incidents by analyzing logs, investigating threats, and implementing remediation measures. Operations & Support - Ensure high availability, reliability, and performance of enterprise network and server infrastructure. - Troubleshoot complex network, server, and security issues, minimizing downtime and ensuring business continuity. - Maintain infrastructure documentation, configuration standards, and operational procedures. - Collaborate with cross-functional teams, vendors, and service providers to support infrastructure projects and operational excellence. .