Senior Network Infrastructure Engineer

NashTech India; Dadri; Hybrid; INR 900,000 - 1,300,000; Full time

Job summary

NashTech India is actively seeking a Senior Network Infrastructure Engineer to design, implement and maintain enterprise network systems. The role requires hands-on expertise across routing, switching, firewalls, VPNs and Azure Networking, with a focus on security, availability and incident management.

The candidate will collaborate with Infrastructure, Cloud, Security, Service Desk, Architecture and project teams on migrations, upgrades and ITIL-aligned change processes.

Qualifications

• Bachelor's degree in Computer Science, IT, Engineering or equivalent professional experience.
• ITIL 4 Foundation or equivalent knowledge.
• CCNA, CompTIA Network+ or equivalent networking certification.

Responsibilities

• Manage, maintain and support enterprise LAN/WAN, routing, switching and network infrastructure.
• Configure and troubleshoot routers, switches, firewalls, VPNs and other network devices.
• Monitor network performance, availability, capacity and security, proactively identifying and resolving issues.
• Handle complex P1/P2 incidents, escalations, troubleshooting and RCA within agreed SLA/KPI targets.
• Administer and troubleshoot network security solutions including Palo Alto, Fortinet or equivalent firewalls, VPNs and access controls.
• Support Azure Networking and hybrid cloud connectivity.
• Work with Project Managers, Architects and Service Transition teams on network/infrastructure projects, migrations, upgrades and implementations.
• Execute production changes in accordance with ITIL Change Management processes, ensuring appropriate documentation, testing and rollback plans.
• Support datacentre, backup, disaster recovery and infrastructure resilience activities.
• Maintain network diagrams, technical documentation, knowledge articles and operational procedures.
• Analyse monitoring/MI data and identify opportunities for performance improvement, automation and operational efficiency.
• Support Shift Left, automation, Infrastructure as Code and DevOps initiatives where applicable.
• Explore and adopt AI-assisted tools for network troubleshooting, log/event analysis, incident diagnosis, knowledge management, documentation and automation, in accordance with the organization's security and AI governance policies.
• Use AI responsibly to identify network trends, correlate alerts, assist with root-cause analysis and improve operational decision-making, while validating AI-generated recommendations before implementation.
• Work effectively with internal teams, customers, suppliers and third-party technology partners.
• Ensure network infrastructure remains secure, available, resilient and operationally stable.

Skills

LAN/WAN Routing

Firewalls Palo Alto

VPN & encryption

Azure Networking

Security & vulnerability

SD-WAN

Automation (PowerShell/Python)

IaC/DevOps

AIOps

Observability

Wireshark

Education

Bachelor's degree in Computer Science/IT/Engineering

Tools

ServiceNow

Job description

The Senior Network Infrastructure Engineer will be responsible for the design, implementation, administration, maintenance and operational stability of the customer's network infrastructure.

The role requires strong hands-on expertise in enterprise networking, routing & switching, firewalls, VPN, network security and Azure Networking, along with the ability to troubleshoot complex technical issues, manage critical incidents, support infrastructure projects and drive continuous improvement.

The engineer will work closely with Infrastructure, Cloud, Security, Service Desk, Architecture, Project Management and third-party teams to ensure secure, reliable and highly available IT services.

Experience Required

4 to 7 Years

Job Type

Permanent

Work Model

Hybrid / Remote

Key Responsibilities

• Manage, maintain and support enterprise LAN/WAN, routing, switching and network infrastructure.
• Configure and troubleshoot routers, switches, firewalls, VPNs and other network devices.
• Monitor network performance, availability, capacity and security, proactively identifying and resolving issues.
• Handle complex P1/P2 incidents, escalations, troubleshooting and Root Cause Analysis (RCA) within agreed SLA/KPI targets.
• Administer and troubleshoot network security solutions including Palo Alto, Fortinet or equivalent firewalls, VPNs and access controls.
• Support Azure Networking and hybrid cloud connectivity.
• Work with Project Managers, Architects and Service Transition teams on network/infrastructure projects, migrations, upgrades and implementations.
• Execute production changes in accordance with ITIL Change Management processes, ensuring appropriate documentation, testing and rollback plans.
• Support datacentre, backup, disaster recovery and infrastructure resilience activities.
• Maintain network diagrams, technical documentation, knowledge articles and operational procedures.
• Analyse monitoring/MI data and identify opportunities for performance improvement, automation and operational efficiency.
• Support Shift Left, automation, Infrastructure as Code and DevOps initiatives where applicable.
• Explore and adopt AI-assisted tools for network troubleshooting, log/event analysis, incident diagnosis, knowledge management, documentation and automation, in accordance with the organization's security and AI governance policies.
• Use AI responsibly to identify network trends, correlate alerts, assist with root-cause analysis and improve operational decision-making, while validating AI-generated recommendations before implementation.
• Work effectively with internal teams, customers, suppliers and third-party technology partners.
• Ensure network infrastructure remains secure, available, resilient and operationally stable.

Required Qualifications

• Bachelor's degree in Computer Science, IT, Engineering or equivalent professional experience.
• ITIL 4 Foundation or equivalent knowledge.
• CCNA, CompTIA Network+ or equivalent networking certification.

Required Experience

• 4+ years of experience in Network/IT Infrastructure and Operations.
• Strong hands-on experience in enterprise network environments.
• Experience managing LAN/WAN, routing, switching, firewalls and VPNs.
• Proven experience handling complex production incidents and technical escalations.
• Experience working with ITIL-based Incident, Problem and Change Management.
• Experience supporting infrastructure projects, migrations and upgrades.
• Experience working with cross-functional technical teams and third-party vendors.

Required Technical Skills

• Routing & Switching - LAN/WAN
• TCP/IP, DNS, DHCP, HTTPS, SFTP
• Network troubleshooting and monitoring
• Firewalls - Palo Alto, Fortinet or equivalent
• VPN, encryption and access control
• Network security and vulnerability management
• Wireshark or equivalent network diagnostic tools
• Datacentre and network infrastructure
• Backup, DR and resilience concepts
• SD-WAN
• Network automation / PowerShell / Python
• Infrastructure as Code (IaC)
• DevOps / CI-CD
• Observability and proactive monitoring
• AI-assisted IT operations / AIOps
• AI tools for network monitoring, event correlation, troubleshooting, RCA and automation
• Advanced DR/resilience concepts
• ServiceNow or similar ITSM tools

Professional Skills

• Strong analytical and problem-solving capability.
• Ability to independently troubleshoot complex technical issues.
• Strong communication and stakeholder management skills.
• Ability to explain technical concepts to non-technical stakeholders.
• Ability to prioritize multiple activities and work effectively under pressure.
• Strong ownership, accountability and attention to detail.
• Customer-focused approach with a continuous improvement mindset.
• Ability to evaluate and validate AI-generated technical recommendations rather than relying on AI outputs without technical verification.

Required Skills

Firewall Network Engineer ITIL Network Security Routing & Switching