Technical Specialist - MS, Network

NTT Limited; Kolkata District; Hybrid; INR 1,400,000 - 2,100,000; Full time

Job summary

NTT DATA in Kolkata is seeking an experienced L3 Network Engineer specializing in Cisco ACI and Versa SD-WAN to join the Network Operations and Engineering team. You will design, implement, and optimize complex enterprise networks and serve as Level 3 escalation point.

The role covers routing/switching, security, documentation, and collaboration with security teams to ensure high availability and compliant designs.

Qualifications

• Bachelor's degree in a related field and 7+ years of enterprise networking experience.
• Deep expertise in Cisco ACI and Versa SD-WAN with strong troubleshooting skills.
• Certifications such as CCNP/CCIE are preferred.

Responsibilities

• Provide Level 3 support for enterprise network infrastructure and incidents.
• Design, implement, and optimize Cisco ACI, Versa SD-WAN, and routing architectures.
• Perform RCA and lead major incident resolution and problem management.

Skills

Cisco ACI

Versa SD-WAN

Routing & Switching

Network Troubleshooting

Education

Bachelor's degree in Computer Science / IT / Electronics / Telecommunications or related field

Tools

BGP

OSPF

EIGRP / IS-IS

VXLAN

Job description

Job Title: Network Engineer L3 (ACI & SD-WAN Specialist)

Make an impact with NTT DATA Join a company that is pushing the boundaries of what is possible. We are renowned for our technical excellence and leading innovations, and for making a difference to our clients and society. Our workplace embraces diversity and inclusion – it’s a place where you can grow, belong and thrive.

Job Summary

We are seeking a highly skilled and experienced L3 Network Engineer to join our Network Operations and Engineering team. The ideal candidate will possess deep expertise in Cisco ACI, Versa SD-WAN, enterprise Routing & Switching, and network troubleshooting. The role requires providing Level 3 support, designing, implementing, optimizing, and maintaining complex enterprise network infrastructures while ensuring high availability, performance, and security.

Key Responsibilities

Network Operations & Support

• Provide Level 3 support for enterprise network infrastructure and critical incidents.
• Act as the technical escalation point for complex network issues.
• Perform root cause analysis (RCA) and implement permanent fixes for recurring problems.
• Lead major incident resolution and problem management activities.

Cisco ACI Administration

• Design, deploy, configure, and troubleshoot Cisco ACI environments.
• Manage ACI Fabric, Tenant configurations, VRFs, Bridge Domains, EPGs, Contracts, and L3Outs.
• Perform firmware upgrades and maintenance activities within ACI environments.

Versa SD-WAN Management

• Configure, administer, and troubleshoot Versa SD-WAN infrastructure.
• Manage Controllers, Director, Analytics, and Edge devices.
• Implement application-aware routing, segmentation, and security policies.
• Support WAN optimization and network transformation initiatives.

Routing & Switching

• Configure and troubleshoot Layer 2 and Layer 3 network technologies.
• Manage enterprise routing protocols including: BGP OSPF EIGRP IS-IS (preferred)
• Configure and support switching technologies: VLANs STP/RSTP/MST EtherChannel/LACP VPC HSRP/VRRP VXLAN (preferred)
• Perform network capacity planning and optimization.

Network Security & Compliance

• Work closely with security teams to implement network security controls.
• Support access control, segmentation, and secure network designs.
• Ensure adherence to organizational and industry standards.

Documentation & Collaboration

• Prepare and maintain network diagrams, standard operating procedures (SOPs), and technical documentation.
• Participate in architecture reviews and network design discussions.
• Mentor L1 and L2 engineers and provide technical guidance.

Required Qualifications

• Education Bachelor's degree in Computer Science, Information Technology, Electronics, Telecommunications, or related field.
• Experience 7+ years of experience in enterprise networking.
• Certifications (Preferred) Cisco CCNP Enterprise Cisco CCIE Enterprise Infrastructure (Preferred)

Location: Kolkata Experience: 7+ Employment Type: Full Time Shift: 24x7 Support / Hybrid (as applicable) Workplace type: On-site Working

About NTT DATA

NTT DATA is a $30+ billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world’s leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. Our consulting and industry solutions help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more than 70 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners. NTT DATA is part of NTT Group, which invests over $3 billion each year in R&D.

Equal Opportunity Employer

NTT DATA is proud to be an Equal Opportunity Employer with a global culture that embraces diversity. We are committed to providing an environment free of unfair discrimination and harassment. We do not discriminate based on age, race, colour, gender, sexual orientation, religion, nationality, disability, pregnancy, marital status, veteran status, or any other protected category.

Our Culture and Values

Is innovation part of your DNA? Do you want to enable a connected future for people, organizations, and society? Join our growing global NTT family and you’ll be part of the world’s largest ICT company (by revenue). We’ve combined the capabilities of 28 remarkable companies to become one, leading technology services provider. Together, we help our people, clients, and communities do great things with technology to create a more secure and connected future. We employ 40,000 people across 57 countries. By bringing together the world’s best technology companies and emerging innovators, we work together to deliver sustainable outcomes to businesses and the world. Innovation is part of our DNA. We believe it’s key to what makes us different. So, we strive to move forward, challenge the status quo, and drive excellence through the technologies we integrate and the services we deliver around the world. The result is connected cities, connected factories, connected healthcare, connected agriculture, connected conservation, connected mobility, and connected sport. Together we enable the connected future. You’ll be joining a global employer that is committed to attracting, growing and keeping the best talent. A place where you will be at the heart of our success!