We are looking for an experienced Senior Cyber Security Engineer . Key Responsibilities Design, implement, configure, and maintain Cisco ACI and UCS infrastructure. Manage and troubleshoot Cisco ACI fabric, tenants, VRFs, bridge domains, EPGs, contracts, and policies. Configure and manage Cisco UCS Manager , Fabric Interconnects, server profiles, and connectivity. Implement network security controls across data center environments. Monitor network and security infrastructure for vulnerabilities, threats, and performance issues. Troubleshoot complex ACI, UCS, LAN, VLAN, routing, switching, and connectivity issues. Configure and manage network segmentation and micro-segmentation using Cisco ACI. Integrate ACI with external networks, firewalls, load balancers, and virtualization platforms. Support security incident investigation and remediation related to network infrastructure. Perform vulnerability assessments and implement security hardening measures. Develop and maintain network/security architecture, design documents, SOPs, and operational procedures. Automate infrastructure and security tasks using scripting and network automation tools. Collaborate with Network, Security, Cloud, Infrastructure, and DevOps teams. Ensure infrastructure compliance with organizational security policies and industry best practices. Participate in infrastructure upgrades, migrations, DR activities, and capacity planning.