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L3 Network Security Engineer - Routing & Switching

L3 Network Security Engineer - Routing & Switching

Live ConnectionsChennai
30+ days ago
Job description

Key Responsibilities :

  • Advanced Troubleshooting : Perform advanced L3-level troubleshooting for complex network incidents and outages, ensuring rapid resolution and minimal downtime.
  • Firewall Management : Expertly manage, configure, and maintain Palo Alto Networks firewalls, FTD (Firepower Threat Defense), and ASA (Adaptive Security Appliance), including the setup of security policies, NAT, VPNs, and threat prevention mechanisms.
  • Switching & Routing : Deploy, configure, and troubleshoot Aruba and Cisco switches across access, distribution, and core layers of the network. Implement and manage static routing and Policy-Based Routing (PBR) throughout the network environment.
  • Network Performance & Optimization : Proactively monitor network performance and conduct regular tuning activities to ensure optimal throughput and reliability.
  • Security & Policy Management : Collaborate with cross-functional teams to ensure proper firewall and network policy configurations are implemented and maintained.
  • Network Operations & Upgrades : Perform network upgrades, apply firmware patches, and meticulously follow change management procedures to maintain network integrity.
  • Documentation & Reporting : Maintain detailed and accurate documentation of network configurations, diagrams, and incident reports.
  • On-Call Support : Participate in on-call rotations and provide escalation support for critical network and security Skills & Experience :
  • Experience : Minimum 6+ years of experience in enterprise network engineering roles.
  • Networking Fundamentals : Deep understanding of Layer 2 / Layer 3 networking concepts, VLANs, trunking,

and IP subnetting.

  • Firewall Expertise : Strong hands-on experience with Palo Alto Networks firewalls and PAN-OS, FTD (Firepower Threat Defense), and Cisco ASA.
  • Switching Proficiency : Proficient in Cisco & Aruba switching (AOS-CX or AOS-S), including CLI-based configuration and troubleshooting.
  • Routing Protocols : Expertise in static routing and Policy-Based Routing (PBR). Familiarity with dynamic routing protocols (e.g., BGP) is a significant plus.
  • Packet Analysis : Ability to analyze packet captures effectively using tools like Wireshark and other PCAP tools, performing thorough root cause analysis.
  • Network Security : Strong understanding and practical application of network security best practices.
  • Certifications (Preferred) : Industry certifications such as PCNSE (Palo Alto Networks Certified Network Security Engineer), ACSA (Aruba Certified Switching Associate) / ACMP (Aruba Certified Mobility Professional), CCNP (Cisco Certified Network Professional) or equivalent are highly preferred.
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    Network Security Engineer • Chennai