Sr. Engineer - Network Administration

CBTS; Chennai District; On-site; INR 1,200,000 - 1,800,000; Full time

Job summary

CBTS in Chennai is seeking a senior network administrator to manage enterprise networks across LAN, WAN, VPN, wireless, and security devices. You will perform advanced troubleshooting, ensure high availability, and support planned changes and upgrades.

This role requires coordinating with NOC, security, and vendors, maintaining documentation, and ensuring compliance with SLAs and audit requirements. Mentoring junior team members and contributing to process improvements are also expected.

Qualifications

• Senior-level network administration experience.
• Experience with LAN/WAN, VPNs, firewalls, and wireless infrastructure.
• Knowledge of change-management processes and incident resolution.

Responsibilities

• Provide senior-level network administration, operational support, and troubleshooting.
• Maintain secure, resilient enterprise connectivity across LAN, WAN, and remote-access environments.
• Configure routers, switches, firewalls, VPNs, and wireless controllers.
• Investigate incidents, perform root-cause analysis, and document corrective actions.
• Maintain network documentation, topology diagrams, device inventories, and incident/change logs.
• Monitor bandwidth, latency, and device health to recommend improvements.

Job description

CBTS serves enterprise and midmarket clients in all industries across the United States and Canada. CBTS combines deep technical expertise with a full suite of flexible technology solutions--including Application Modernization, Managed Hybrid Cloud, Cybersecurity, Unified Communications, and Infrastructure solutions. From developing and deploying modern applications and the secure, scalable platforms on which they run, to managing, monitoring, and optimizing their operations, CBTS delivers comprehensive technology solutions for its clients' transformative business initiatives. For more information, please visit www.cbts.com .

OnX is a leading technology solution provider that serves businesses, healthcare organizations, and government agencies across Canada. OnX combines deep technical expertise with a full suite of flexible technology solutions—including Generative AI, Application Modernization, Managed Hybrid Cloud, Cybersecurity, Unified Communications, and Infrastructure solutions. From developing and deploying modern applications and the secure, scalable platforms on which they run, to managing, monitoring, and optimizing their operations, OnX delivers comprehensive technology solutions for its clients’ transformative business initiatives. For more information, please visit www.onx.com .

1. Role Purpose: Provides senior-level network administration, operational support, and technical troubleshooting to maintain secure, resilient, and high-performing enterprise connectivity across LAN, WAN, wireless, firewall, and remote-access environments. The role ensures network availability, supports planned changes and upgrades, drives incident resolution and root-cause analysis, and contributes to documentation, compliance, and continuous improvement of network operations.

2. Key Responsibilities:

• Administer, monitor, and support enterprise network infrastructure to ensure availability, performance, and secure connectivity across business locations and supported environments.
• Configure, maintain, and troubleshoot routers, switches, firewalls, VPNs, wireless controllers, load balancers, and related network services in line with approved standards.
• Implement network changes, upgrades, patching, backups, and configuration updates through approved change-management processes while minimizing service risk.
• Investigate and resolve network incidents and service degradations, perform root-cause analysis, document corrective actions, and escalated complex issues when required.
• Maintain accurate network documentation, including topology diagrams, device inventories, configuration records, operational procedures, and incident/change logs.
• Monitor performance indicators such as bandwidth utilization, latency, packet loss, device health, capacity, and availability; recommend improvements where trends indicate risk.
• Coordinate with NOC, infrastructure, security, service delivery, vendors, and managed service providers to support incident resolution, planned maintenance, and service improvements.
• Ensure adherence to SLAs, operational controls, security policies, compliance requirements, and audit readiness for supported network environments.
• Support network resilience activities, including failover validation, backup and recovery checks, vulnerability remediation, and implementation of security hardening actions.
• Contribute to knowledge base articles, SOP updates, audit responses, service reviews, automation opportunities, and process improvement initiatives; provide guidance to junior team members where applicable.

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