Bilingual Japanese Network Engineer – IT/OT Infrastructure

Required Skills & Experience

Technical Skills

· Strong experience with enterprise networking technologies (LAN/WAN/WLAN), Cisco router and SW, Palo Alto FW.

· Hands‑on experience with routers, switches, firewalls, and wireless infrastructure.

· Solid understanding of VLAN, IP addressing, routing, and traffic control.

· Working knowledge of OT networks, industrial environments, or factory systems.

· Familiarity with ITSM tools and operational processes.

 
Professional Experience

· 3–7+ years of experience as a Network Engineer or Infrastructure Engineer.

· Experience supporting IT infrastructure and OT or factory environments is strongly preferred.

· Experience working in multi‑vendor, multi‑site environments.

· Ability to work in onsite, remote, and hybrid operational settings.

· Fluent English and Japanese

 
Preferred Qualifications

· Network certifications (e.g., Cisco, Palo Alto)

· Experience with industrial network segmentation or OT security

· Knowledge of ITIL‑based operational processes

· Experience in manufacturing, logistics, utilities, or critical infrastructure environments

Key Responsibilities

1. Network Design & Implementation

· Design, implement, and maintain IT and OT network infrastructure, including LAN, WAN, WLAN, and industrial networks.

· Support IT/OT integration projects, including network segmentation, VLAN/IP design, traffic flow definition, and firewall policies.

· Participate in network upgrades, expansions, and migrations across data center, cloud, and factory environments.

· Validate physical and logical network connectivity during deployment and testing phases.

 
2. IT/OT Network Operations

· Provide day‑to‑day operational support for routers, switches, firewalls, wireless controllers, and network security devices.

· Monitor network performance, availability, and faults using monitoring and ITSM tools.

· Respond to and resolve network incidents and service requests, ensuring minimal impact to IT and OT operations.

· Support factory and onsite network validation, including cabling, port checks, and traffic control when required.

 
3. Incident, Problem & Change Management

· Participate in incident, problem, and change management processes aligned with ITIL practices.

· Perform root cause analysis (RCA) for recurring or major network incidents.

· Implement approved network changes, including configuration updates, firmware upgrades, and security rule changes.

· Ensure changes are executed with consideration for OT operational and safety constraints.

 
4. IT/OT Security Support

· Implement and maintain network security controls, including segmentation, access control, and firewall rules for IT and OT zones.

· Support secure remote access solutions for OT environments.

· Collaborate with security teams to support OT cybersecurity requirements and incident response activities.

· Ensure network configurations comply with internal security policies and industry standards.

 
5. Documentation & Reporting

· Create and maintain network documentation, including:

o Physical and logical network diagrams

o Traffic flow diagrams

o IP/VLAN lists

o Port mappings and configuration records

· Support preparation of change records, test results, and operational handover documents.

· Provide technical input for service reports and operational reviews when required.

 
6. Collaboration & Stakeholder Support

· Work closely with project managers, OT engineers, and vendors.

· Participate in design and progress meetings with IT and OT stakeholders.

· Support coordination with third‑party vendors, ISPs, and hardware manufacturers (OEM TACs).

· Provide technical guidance during project and transition phases.