Network Engineer

Infinityquest It Services; India; Remote; INR 1,100,000 - 1,600,000; Part time

Job summary

Infinityquest It Services is seeking a Network Engineer (OT & IT) to support secure connectivity solutions across multiple sites in India. The role involves network readiness assessments, validating connectivity, firewall requirements, and secure integration of OT and IT networks in line with industrial cybersecurity best practices.

The candidate will configure Cisco routing/switching, troubleshoot firewalls, and ensure segmentation per the Purdue Model and IEC 62443 standards.

Qualifications

• 5+ years of experience in Network Engineering.
• Hands-on Cisco Routing and Switching expertise.
• Experience configuring and troubleshooting firewalls (Cisco ASA, Fortinet, Palo Alto, Check Point, etc.).
• Experience performing network readiness assessments and connectivity validation.
• Strong understanding of Industrial Networks (OT/ICS).
• Knowledge of IEC 62443 and Purdue Model; network segmentation concepts.
• Solid knowledge of TCP/IP, VLANs, Routing Protocols, ACLs, NAT, VPN, DNS, and DHCP.
• Experience in multi-site enterprise network environments.
• Excellent troubleshooting and documentation skills.

Responsibilities

• Conduct network readiness surveys and assess customer network infrastructure before implementation.
• Analyze IT and OT network environments and identify connectivity requirements.
• Design and validate network connectivity across multiple customer sites.
• Prepare firewall rule specifications and coordinate implementation with customer network teams.
• Configure and troubleshoot Cisco routing and switching environments.
• Support industrial networking including Industrial Ethernet and industrial switches.
• Validate communication between OT assets, applications, and secure access platforms.
• Work with customers to ensure network segmentation following the Purdue Model and IEC 62443 standards.
• Troubleshoot routing, switching, VLANs, NAT, ACLs, VPNs, and firewall-related issues.
• Collaborate with cybersecurity, infrastructure, and implementation teams during deployment.
• Document network topology, implementation plans, and technical configurations.
• Provide post-deployment validation and technical support during rollout phases.

Skills

Cisco Routing

Cisco Switching

Firewalls

Network Readiness

OT/ICS Networks

IEC 62443

Purdue Model

TCP/IP

VLANs

NAT/VPN/DNS/DHCP

Troubleshooting

Documentation

Multi-site Networks

Job description

Job Description Network Engineer (OT & IT)

Position: Network Engineer (OT & IT)
Employment Type: Contract (Project-Based)
Location: Pune / Hyderabad (Remote with occasional travel if required)

Job Summary

We are seeking an experienced Network Engineer (OT & IT) to support the deployment of secure connectivity solutions across multiple customer sites. The role involves conducting network readiness assessments, validating connectivity, defining firewall requirements, and ensuring secure integration of Operational Technology (OT) and Information Technology (IT) networks in line with industrial cybersecurity best practices.

Key Responsibilities

• Conduct network readiness surveys and assess customer network infrastructure before implementation.
• Analyze existing IT and OT network environments and identify connectivity requirements.
• Design and validate network connectivity across multiple customer sites.
• Prepare firewall rule specifications and coordinate implementation with customer network teams.
• Configure and troubleshoot Cisco routing and switching environments.
• Support industrial networking, including Industrial Ethernet and industrial switches.
• Validate communication between OT assets, applications, and secure access platforms.
• Work with customers to ensure network segmentation following the Purdue Model and IEC 62443 standards.
• Troubleshoot routing, switching, VLANs, NAT, ACLs, VPNs, and firewall-related issues.
• Collaborate with cybersecurity, infrastructure, and implementation teams during deployment activities.
• Document network topology, implementation plans, and technical configurations.
• Provide post-deployment validation and technical support during rollout phases.

Mandatory Skills

• 5+ years of experience in Network Engineering.
• Strong hands-on experience with Cisco Routing and Switching.
• Experience configuring and troubleshooting firewalls (Cisco ASA, Fortinet, Palo Alto, Check Point, etc.).
• Experience performing network readiness assessments and connectivity validation.
• Good understanding of Industrial Networks (OT/ICS).
• Knowledge of IEC 62443, Purdue Model, and network segmentation concepts.
• Strong knowledge of TCP/IP, VLANs, Routing Protocols, ACLs, NAT, VPN, DNS, and DHCP.
• Experience working in multi-site enterprise network environments.
• Excellent troubleshooting and documentation skills.