Network Infrastructure Engineer Networking | Cisco | Firewall | VPN | Infrastructure

Company: Spark Techwave InnovationZ Pvt Ltd
Job Type: Full-Time
Experience: 26 Years
Location: Chennai / Remote / Hybrid
Department: IT Infrastructure / Network Engineering

Job Summary

Spark Techwave InnovationZ Pvt Ltd is looking for a Network Infrastructure Engineer to design, implement, maintain, monitor, and troubleshoot enterprise network infrastructure.

The ideal candidate should have hands-on experience with routing, switching, TCP/IP, VLANs, firewalls, VPNs, network monitoring, and enterprise network infrastructure. The role will involve maintaining reliable, secure, and highly available network environments across data centers, offices, and cloud-connected infrastructure.

Key Responsibilities

- Design, configure, implement, and maintain enterprise network infrastructure.
- Configure and manage routers, switches, firewalls, load balancers, and wireless infrastructure.
- Manage LAN, WAN, WLAN, and data center network environments.
- Configure and troubleshoot VLANs, IP addressing, subnetting, DHCP, DNS, and NAT.
- Configure and troubleshoot routing protocols such as OSPF, BGP, and EIGRP.
- Manage site-to-site and remote-access VPN connectivity.
- Monitor network performance, availability, bandwidth, and capacity.
- Identify and resolve network connectivity, latency, packet loss, and performance issues.
- Implement network security controls including firewall policies, access controls, and network segmentation.
- Perform network upgrades, configuration changes, migrations, and infrastructure maintenance.
- Maintain network diagrams, configuration documentation, IP address management,



and infrastructure records.
- Perform network incident investigation and root-cause analysis.
- Coordinate with ISPs, technology vendors, and internal infrastructure teams.
- Support connectivity between on-premises infrastructure and AWS/Azure cloud environments.
- Participate in capacity planning, network optimization, disaster recovery, and high-availability initiatives.
- Follow change-management, security, backup, and infrastructure standards.

Required Skills

- Strong understanding of TCP/IP, OSI model, LAN, WAN, and enterprise networking.
- Hands-on experience with routing and switching.
- Experience with Cisco or equivalent enterprise networking equipment.
- Strong knowledge of VLANs, subnetting, DHCP, DNS, NAT, and IP addressing.
- Experience with OSPF and BGP.
- Hands-on experience with firewalls and VPN technologies.
- Experience with network monitoring and troubleshooting tools.
- Knowledge of network security and access-control concepts.
- Experience with network troubleshooting and incident resolution.
- Understanding of high availability and network redundancy.
- Positive knowledge of structured network infrastructure and documentation.

Good to Have

- Cisco Catalyst / Nexus.
- Cisco ASA / Firepower.
- Palo Alto / Fortinet / Check Point.
- SD-WAN technologies.




- Load balancers such as F5 or equivalent.
- Enterprise wireless technologies and wireless controllers.
- Network automation using Python or Ansible.
- Cloud networking – AWS VPC / Azure VNet.
- Network monitoring tools such as SolarWinds, PRTG, Zabbix, Nagios, or Grafana.
- IPv6 knowledge.
- Data center networking experience.
- CCNA / CCNP certification.

Education

- Bachelor's or Master's degree in Computer Science, Information Technology, Engineering, Networking, or a related field.

Preferred Candidate Profile

- 2–6 years of hands-on experience in network infrastructure or enterprise networking.
- Strong troubleshooting and problem-solving skills.
- Experience supporting enterprise network environments.
- Good understanding of network security and infrastructure availability.
- Ability to work independently and collaborate with infrastructure, cloud, and security teams.
- Strong communication and technical documentation skills.

Send your resume at [email protected]

Key Skills

Network Infrastructure, Network Engineer, Cisco, Routing, Switching, TCP/IP, VLAN, Subnetting, OSPF, BGP, EIGRP, Firewall, VPN, LAN, WAN, WLAN, DNS, DHCP, NAT, Network Security, Network Monitoring, SD-WAN, Load Balancer, Cisco ASA, Fortinet, Palo Alto, AWS Networking, Azure Networking

Suggested Naukri Job Titles

- Network Infrastructure Engineer
- Network Engineer
- Network Infrastructure Specialist
- Enterprise Network Engineer
- Network Operations Engineer
- Network Administrator
- Network & Security Engineer
- Data Center Network Engineer
- Senior Network Infrastructure Engineer

📌 Network Infrastructure Engineer (India)
🏢 Spark Tech Wave Innovation
📍 India