Sr. Network & Security Engineer Location : Chennai - Taramani (Work From Office) Notice : Short Period / Immediate Full time role RESPONSIBILITIES Design, deploy, and manage scalable enterprise network infrastructures focusing on Cisco switches and routing technologies. Configure and maintain next-generation firewalls, including Palo Alto, FortiGate, and Cisco Firepower NGFW. Administer F5 Load Balancers (LTM, ASM) to ensure high availability and secure application delivery. Manage the full SSL certificates and domain services lifecycle, including DNS configuration and domain registration. Implement, monitor, and support endpoint security platforms such as Symantec Endpoint Protection Manager (SEPM), Trend Micro, and CrowdStrike. Perform ongoing threat monitoring, vulnerability remediation and incident response related to endpoints and network devices. Troubleshoot & resolve complex issues across network and endpoint layers, focusing on minimising downtime. Define/enforce network & endpoint security policies in alignment with compliance & organisational needs. Maintain detailed documentation of all infrastructure components, including network architecture, firewall configurations, SSL/DNS records, domain configurations, and endpoint security deployments. Collaborate with internal IT teams and business stakeholders to align security and infrastructure strategies with organisational objectives. Stay current on emerging threats, security technologies, and industry best practices. DESIRED SKILLS Experience in network and security engineering, including endpoint protection management. Expertise with Cisco Switches, routing protocols, and network design. Proven experience with Palo Alto, FortiGate, and Cisco Firepower firewalls. Strong operational knowledge of F5 Load Balancers (LTM, ASM). In-depth understanding of SSL/TLS certificate management and DNS/domain services. Hands-on experience with SEPM, Trend Micro, and CrowdStrike for endpoint protection. Solid knowledge of TCP/IP, VPNs, VLANs, NAT, ACLs, and network segmentation techniques. Familiarity with cybersecurity frameworks, threat intelligence, and incident response methodologies. Strong troubleshooting and analytical skills with a proactive mindset Experience in license management, procurement, purchase, contracts and vendor management for security and network infrastructure. Ability to work independently, manage multiple priorities, and provide off-hours/on-call support as needed. Excellent verbal and written communication skills. QUALIFICATIONS Bachelors or Masters degree in a related field. CCNP, PCNSE, Fortinet NSE Certifications, F5 Certified Administrator Interested can forward your latest resumes to John.s@zirlen.com
