Job
Description
Job Title: Senior Network Engineer (L3/L4) Location: Remote / Chennai / Gurugram Experience: 10+ Years Position Summary: We are seeking a highly experienced and hands-on Senior Network Engineer (L3/L4) who can own, lead, and drive all aspects of network engineering from architecture and design to implementation, operations, and support. This is a strategic, senior-level technical role requiring deep expertise across routing, switching, firewalls, network security, cloud and hybrid connectivity, and vendor-agnostic infrastructure management. The ideal candidate should be capable of handling the full network lifecycle independently and be a thought leader in designing resilient, secure, and high-performance networks for global enterprise environments. Key Responsibilities: Architecture & Design Lead the end-to-end design and architecture of enterprise-class networks (LAN, WAN, SD-WAN, cloud, data center). Design scalable and secure network topologies, integrating routing protocols (BGP, OSPF, EIGRP), VLANs, subnetting, ACLs, and QoS. Define network blueprints, migration plans, and future-state architectures for global and hybrid IT environments. Architect and implement high availability and disaster recovery solutions using redundancy, clustering, and failover strategies. Integrate on-prem, hybrid, and cloud environments (AWS, Azure) into cohesive network solutions. Implementation & Operations Deploy and configure network hardware from multiple vendors: Cisco, Aruba, HP, Juniper, Avaya, etc. Manage and optimize Layer 2/3 infrastructure including routers, switches, wireless, VPN, and WAN optimization tools. Configure and maintain firewalls and security appliances: Cisco ASA, Palo Alto, Fortinet, FMC, Juniper FTD, etc. Build and manage VPNs (IPSec, SSL, GRE), segmentation (micro/macro), and SD-WAN deployments. Monitor network health, performance, and capacity using advanced tools; create dashboards and alerts. Security & Compliance Drive network security initiatives, including design and implementation of intrusion prevention systems (IPS), NAC, and Zero Trust architecture. Ensure compliance with internal and external security standards through network hardening, audits, and regular reviews. Design and maintain secure remote access and multi-site connectivity strategies. Perform security assessments and vulnerability mitigation related to network layers. Troubleshooting & Support Act as the highest escalation point (Tier 3/4) for complex network issues, including packet capture, traffic analysis, and protocol debugging. Lead root cause analysis (RCA) efforts for critical incidents, post-mortems, and corrective/preventive actions. Work closely with vendors to resolve hardware/software bugs and proactively manage lifecycle support contracts. Documentation & Reporting Maintain detailed documentation of network infrastructure, including diagrams, IP schemas, configuration repositories, and SOPs. Generate performance and availability reports; present findings and recommendations to both technical and business stakeholders. Leadership & Collaboration Collaborate with enterprise architects, cybersecurity teams, DevOps, and application owners to align network infrastructure with business goals. Interface with customers and leadership on solution designs, RFPs, PoCs, and implementation roadmaps. Mentor junior and mid-level engineers; lead knowledge-sharing initiatives and develop playbooks for best practices. Required Skills & Qualifications: Minimum 10+ years of experience in enterprise networking with strong architecture and troubleshooting background. Proven expertise in multi-vendor environments: Cisco, HP, Aruba, Juniper, Avaya. Advanced knowledge of routing protocols (BGP, OSPF, EIGRP, etc.) and switching technologies (VLANs, STP, VTP, port-channeling). Strong experience with firewalls and network security appliances (Cisco ASA, Palo Alto, FMC, Juniper FTD, etc.). Deep understanding of high availability, load balancing, VPNs, cloud networking (AWS/Azure/GCP), and SD-WAN. Strong scripting/automation skills (Python, Ansible) are a plus. Network certifications such as CCNP/CCIE, JNCIP/JNCIE, PCNSE, AWS Networking Specialty are highly desirable. Experience with enterprise monitoring tools (SolarWinds, Nagios, Wireshark, PRTG, etc.). Excellent communication, documentation, and leadership skills. Location : - Chennai, Gurugram, Remote
