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Senior Network Engineer (WAN / Cisco SD-WAN)

Diverse Lynx India
Location not stated
Senior
4 months ago
  • Cisco
  • SD-WAN
  • BGP
  • IPSec
  • OSPF
  • ACLS
  • QoS
  • Network Security
  • Prisma
  • Server-Sent Events
  • CCNP
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Position Summary

Cognizant is seeking an experienced Senior Network Engineer with strong expertise in WAN Architecture, Cisco Viptela SD-WAN, BGP, and IPsec technologies. The ideal candidate will be responsible for designing, implementing, and supporting large-scale enterprise WAN and SD-WAN environments while ensuring high availability, security, and performance across global networks.

Key Responsibilities

  • Design, implement, and support enterprise WAN and Cisco Viptela SD-WAN solutions.
  • Manage and troubleshoot Cisco SD-WAN components including vManage, vSmart, vBond, and vEdge/cEdge devices.
  • Design and maintain scalable routing architectures using BGP, OSPF, route-maps, prefix-lists, and ACLs.
  • Configure and troubleshoot IPsec VPNs, site-to-site connectivity, and secure WAN communication.
  • Collaborate with service providers and telecom vendors for circuit provisioning, issue resolution, and lifecycle management.
  • Perform network performance analysis, capacity planning, and WAN optimization.
  • Implement QoS policies to ensure application performance and traffic prioritization.
  • Support network security initiatives including VPN security, segmentation, and secure access solutions.
  • Create and maintain network design documents, HLDs, LLDs, implementation plans, and operational runbooks.
  • Participate in troubleshooting complex network incidents and lead root cause analysis activities.
  • Work closely with cross-functional teams to support business-critical network infrastructure.

Required Skills

Primary Skills

  • BGP
  • Cisco Viptela SD-WAN
  • IPsec
  • WAN Design & Architecture

Technical Expertise

  • Strong hands-on experience with Cisco SD-WAN (vManage, vSmart, vBond, vEdge/cEdge).
  • Advanced knowledge of BGP, OSPF, route redistribution, route-maps, ACLs, and policy-based routing.
  • Experience with WAN design, migration, deployment, and troubleshooting.
  • Strong understanding of VPN technologies, IPsec tunnels, QoS, and network security principles.
  • Experience coordinating with telecom/service providers for WAN circuit management and troubleshooting.
  • Ability to troubleshoot complex routing, connectivity, and performance issues in large-scale enterprise environments.

Good-to-Have Skills

  • Palo Alto Prisma Access SSE.
  • Experience with SASE/SSE platforms.
  • Knowledge of cloud networking and secure access solutions.
  • Exposure to network automation and scripting.

Certifications

Mandatory

  • Valid CCNP Enterprise Certification

Preferred

  • Palo Alto Prisma Access Certification
  • Any SASE/SSE Certification

Required Experience

  • Minimum 6+ years of experience in enterprise networking.
  • Proven experience designing, deploying, and supporting large-scale WAN and SD-WAN environments.
  • Experience working in global enterprise or managed services environments.

Soft Skills

  • Strong communication and stakeholder management skills.
  • Excellent analytical and troubleshooting abilities.
  • Ability to work independently and collaborate with global teams.
  • Strong documentation and presentation skills.

Senior Network Engineer (WAN / Cisco SD-WAN) · Diverse Lynx India

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