N/A - Network Operations & Support

Tata Communications; Mumbai; On-site; INR 1,800,000 - 2,800,000; Full time

Job summary

Tata Communications is seeking an L3 Cisco ACI and networking Engineer for onsite operations. You will configure and administer APIC, spine and leaf devices, and manage multi-tenancy with EPGs and contracts.

You’ll lead incident resolution, integration with security and load balancers, and fabric upgrades. The role requires deep ACI experience, strong routing knowledge (BGP/OSPF), and familiarity with WAN technologies like MPLS and VPNs.

Qualifications

• Extensive experience administering Cisco ACI fabrics and APIC controllers.
• Strong routing/switching knowledge: BGP, OSPF, VXLAN, EVPN, and related protocols.
• Hands-on experience with Cisco Nexus 9K, firmware upgrades, and policy management.
• Ability to troubleshoot complex L3/L2 outages and coordinate with vendors.
• Experience with WAN tech including MPLS, IPsec, GRE, VPN, and DMVPN.

Responsibilities

• Configure and administer APIC controllers, spine, and leaf switches.
• Manage multi-tenancy (Tenants, VRFs, BD, EPGs) and security contracts.
• Lead L3/L2 incident resolution and RCA for major outages.
• Integrate ACI with external services, firewalls, and load balancers.
• Execute fabric upgrades, firmware updates, and capacity expansions.
• Maintain network diagrams, runbooks, and SOPs; train junior engineers.
• Lead Greenfield deployments, fabric initialization, and baseline policy deployment.

Skills

Cisco ACI

Routing & Switching

BGP & OSPF

MPLS & VPN

IPSec & GRE

Nexus 9K

VPC & STP

LACP

Networking Troubleshooting

Vendor Support

Communication

High-Pressure Work

SD-WAN (Viptela)

Tools

APIC

Nexus Dashboard

Nexus 9K switches

Job description

About The Company

Tata Communications Redefines Connectivity with Innovation and IntelligenceDriving the next level of intelligence powered by Cloud, Mobility, Internet of Things, Collaboration, Security, Media services and Network services, we at Tata Communications are envisaging a New World of Communications

About The Company

Tata Communications Redefines Connectivity with Innovation and IntelligenceDriving the next level of intelligence powered by Cloud, Mobility, Internet of Things, Collaboration, Security, Media services and Network services, we at Tata Communications are envisaging a New World of Communications

JD L3 ACI Cisco Consulting Engineer - Onsite Operations Support – 2 HC

• Ability to manage multiple priorities in a fast-paced environment.
• Installing, configuring, and supporting Cisco Routers and Switches.
• Deliver expert-level support for Cisco ACI infrastructure, including troubleshooting, configuration, and optimization.
• Engage in proactive monitoring and maintenance of ACI environments to ensure optimal performance and reliability.
• Good Knowledge of ACI is required
• Updating Network equipment to the latest firmware releases.
• Replacing faulting network hardware components when required.
• Reporting network status to key stakeholders.
• Strong knowledge in Routing and Switching technology such as BGP, OSPF, VPC, Multicast, RSTP, MSTP, NAT, PBR, FHRP
• Knowledge in WAN technology such as MPLS, IPSEC, GRE, VPN, DMVPN.
• Significant practical experience in troubleshooting connectivity issues across firewall/Load Balancer or proxy
• Excellent communication and co-ordination skills within technology community.
• Excellent problem analysis and solving skill applying creativity, innovation and thinking out of the box approach when dealing with challenges.
• Able to work under high pressure in a challenging environment.
• Good to have knowledge in Cisco SDWAN solution (Viptela)
• Routing- BGP, OSPF and Static
• Understand how MPLS works
• Working level understanding of IPSEC, GRE, GETVPN
• In depth exposure on Cisco nexus 9K family from installation, commissioning, configuration (Mandatory)
• Switching- VPC,FHRP,STP,LACP.

Roles and Responsibilities for L3

Core ACI Administration & Policy Management

• Configure and administer APIC controllers, spine and leaf switches.
• Manage multi-tenancy structures, including Tenants, VRFs, and Bridge Domains (BDs).Implement Endpoint Groups (EPGs), Application Profiles, and security Contracts.
• Build and manage Layer 3 external connections (L3Out) using OSPF or BGP routing protocols
  

Incident Management & Advanced Troubleshooting

• Resolve complex L3/L2 network outages and high-severity tickets escalated from L1/L2 teams.
• Troubleshoot intricate issues regarding endpoint learning, contract drops, and VXLAN forwarding.
• Perform packet capture analysis and execute root cause analysis (RCA) for major incidents.
• Interface directly with vendor support like Cisco TAC for deep software bugs or hardware failures
  

Integration & Infrastructure Maintenance

• Integrate the ACI fabric with external network services, firewalls, and load balancers.
• Execute scheduled fabric upgrades, firmware updates, and infrastructure expansions.
• Monitor overall health scores, audit logs, and telemetry statistics via tools like Nexus Dashboard
  

Documentation & Collaboration

• Maintain accurate network diagrams, runbooks, and standard operating procedures (SOPs).
• Partner with security, server, and storage teams during migrations or application rollouts.
• Deliver technical knowledge-transfer sessions and guidance to junior operations team members
  

First-Node Integration & Project Delivery

• Lead Greenfield Deployments: Own the initial provisioning and onboarding of the first ACI leaf or spine switches for new projects or data centre expansions.
• Define Fabric Initialization: Execute the boot sequence, register switch nodes via the APIC, and assign precise node IDs, pod IDs, and TEP IP pools.
• Establish Core Connectivity: Configure the primary physical and logical interfaces, including VPC domains, Link Aggregation (LACP), and initial AAA/RADIUS configurations.
• Set Baseline Policies: Deploy the foundation-level fabric access policies, interface policies, and AEPs (Attachable Entity Profiles) required for downstream project scaling.
  

POA / MOP Validation & Approval

• Review Technical Risk: Critically evaluate engineering Plans of Action (POAs) and Methods of Procedure (MOPs) to identify single points of failure or potential production downtime.
• Enforce Rollback Compliance: Validate that every network change plan contains a verified, step-by-step fallback strategy to restore the fabric to its previous stable state.
• Approve High-Risk Changes: Act as the final technical authority to approve or reject complex ACI implementation scripts, configuration rollouts, or integration steps during Change Advisory Board (CAB) reviews.
• Enforce Post-Change Validation: Mandate and verify comprehensive pre- and post-checks—such as comparing routing tables and verifying EPG endpoints—to ensure successful implementation.
  

Technical Training & Knowledge Transfer

• Deliver Structured Mentorship: Conduct regular technical training sessions and deep-dives for L1 and L2 operational engineers to improve overall team capability.
• Develop Simulation Labs: Build and maintain mock ACI environments or lab topologies to train staff on troubleshooting contract drops, endpoint issues, and L3Out routing.
• Up-skill Teams on New Features: Provide targeted knowledge transfer on advanced ACI features, firmware upgrade procedures, and new hardware integrations as the fabric evolves.
• Author Training Documentation: Create clear, step-by-step training guides, troubleshooting playbooks, and video walkthroughs covering common operational scenarios.