L3 support Network Engineer

As a L3 support Network Engineer specializing in VSS and Nexus integration services, you'll be responsible for designing, implementing, and maintaining complex network infrastructures, focusing on Cisco Nexus 6000 or 7000 or 9000 series switches and Cisco Virtual Switch System technologies, ensuring high availability, performance, and security.

Cognizant’s CIS (Cognizant Infrastructure Services) Practice is a global leader in providing IT infrastructure services. We deliver innovative solutions to optimize and transform IT infrastructure, ensuring business agility and operational efficiency. Our services include cloud computing, data center management, network services, and cybersecurity. We focus on understanding client needs and delivering customized solutions to drive business success.

• Design, implement, and maintain complex network infrastructures, including LAN, WAN, and data center networks.
• Focus on Cisco Nexus 6000 or 7000 or 9000 series switches and Cisco VSS technologies.
• Ensure network designs meet business requirements, performance standards, and security policies.
• Develop and document network topologies and configurations.

• Deep understanding of Cisco VSS technology, including fabric partitioning, redundancy, and failover mechanisms.
• Extensive experience with Cisco Nexus 6000 or 7000 or 9000 series switches, including configuration, troubleshooting, and optimization.
• Proficient in implementing and managing Nexus Fabric, including Virtual Port Channels (vPC) and Nexus 9000 series switch features.

• Diagnose and resolve complex network issues, including performance bottlenecks, connectivity problems, and security vulnerabilities.
• Utilize network monitoring tools and protocols to identify and address issues proactively.
• Document and communicate network issues and resolutions effectively.

• Implement and maintain network security measures, including access control lists (ACLs), firewalls, and intrusion detection/prevention systems.
• Stay up-to-date on the latest security threats and vulnerabilities.

• Collaborate with other IT teams, including server, storage, and application teams, to ensure network infrastructure meets business needs.
• Communicate network status, issues, and resolutions effectively to stakeholders.

• Stay current with the latest network technologies and industry best practices.
• Propose and implement improvements to network infrastructure and processes.

• Participate in the planning, execution, and completion of network projects.
• Manage network changes and upgrades effectively.

• 5+ years of experience in network engineering, with a strong focus on Cisco technologies.
• Extensive knowledge of networking protocols (e.g., TCP/IP, OSPF, BGP, MPLS).
• Experience with network operating systems (e.g., IOS, NX-OS).
• Familiarity with network monitoring and management tools (e.g., Solar Winds, PRTG).
• Strong understanding of network security principles and practices.
• Certifications:
  
  Cisco certifications (e.g., CCNP, CCIE) are highly desirable.

This role is not able to offer visa transfer or sponsorship now or in the future* . Applications will be accepted until Feb 16, 2026.

This position is also eligible for Cognizant’s discretionary annual incentive program, based on performance and subject to the terms of Cognizant’s applicable plans.

• Medical/Dental/Vision/Life Insurance
• Paid holidays plus Paid Time Off
• 401(k) plan and contributions
• Long-term/Short-term Disability
• Paid Parental Leave

Disclaimer:
The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.