Job Summary

We are seeking a skilled and proactive Network Security Engineer to design, implement, manage, and secure enterprise network infrastructure. The ideal candidate should possess strong expertise in network administration, routing & switching, firewall management, datacenter networking, and network security technologies. The role requires troubleshooting complex network issues, ensuring network availability, and implementing security best practices across the organization.

Key Responsibilities

- Design, configure, monitor, and maintain enterprise network infrastructure.
- Manage and support routers, switches, firewalls, VPNs, and WAN/LAN environments.
- Configure and troubleshoot routing protocols such as OSPF, BGP, EIGRP, and static routing.
- Administer and secure network security devices including Palo Alto, Fortinet, Check Point, Cisco ASA/Firepower, or similar technologies.
- Implement network security policies, access controls, IDS/IPS, and segmentation strategies.
- Monitor network performance, identify bottlenecks, and perform capacity planning.
- Support datacenter network operations including core switching, redundancy, and high availability.
- Perform firewall rule reviews, security audits, and vulnerability remediation activities.
- Troubleshoot Layer 2 and Layer 3 networking issues.
- Collaborate with security, server, cloud, and infrastructure teams to support business operations.
- Prepare network documentation,



architecture diagrams, SOPs, and incident reports.
- Participate in incident response and root cause analysis for network/security incidents.
- Ensure compliance with ITIL processes including Incident, Change, and Problem Management.

Required Technical Skills

Networking
- TCP/IP, DNS, DHCP, VLANs, STP, NAT
- Switching & Routing
- OSPF, BGP, EIGRP
- WAN/LAN Management
- VPN Technologies (IPSec, SSL VPN)

Security
- Network Security Architecture
- Firewall Administration
- IDS/IPS Solutions
- Network Access Control (NAC)
- Security Hardening & Policy Management

Firewall Technologies (Any)
- Palo Alto
- Fortinet
- Cisco ASA / Firepower
- Check Point
- Sophos

Datacenter Technologies
- Cisco Nexus Switches
- Datacenter Networking
- High Availability Architecture
- Disaster Recovery Planning

Monitoring Tools
- SolarWinds
- PRTG
- Nagios
- ManageEngine
- Wireshark

Required Qualifications

- Bachelor's Degree in Computer Science, Information Technology, Electronics, or related field.
- Robust understanding of network and security concepts.
- Experience managing enterprise-level network infrastructure.
- Knowledge of ITIL processes and best practices.

Preferred Certifications

- CCNA / CCNP (Routing & Switching / Enterprise)
- Cisco Security Certifications
- Fortinet NSE
- Palo Alto PCNSA / PCNSE
- ITIL Foundation
- CompTIA Security+
- CEH (Preferred)

📌 Lead Engineer - Network Security (India)
🏢 3i Infotech
📍 India