【大手外資系金融グループ】シニアネットワークエンジニア

Our client, a leading global insurance company, is seeking a Senior Network Engineer to join their IT department.

The primary responsibility of this role is to support the migration of Japan’s servers and applications to a cloud environment (GCP) from a network perspective. You will analyze and design network architecture components including routing, firewalls, DNS, and load balancers to ensure a smooth and successful migration.
In addition, you will be responsible for delivering and improving high-quality network services for Japan and global locations by collaborating closely with infrastructure teams, business units, IT departments, and external vendors.

Responsibilities:
- Design and develop network solutions related to GCP migration
- Create network designs and technical documentation aligned with global standards, and support global review processes
- Design, implement, and support network technologies including routing, switching, wireless networks, firewalls, DNS, DHCP, load balancers, and proxies
- Provide network support for cloud infrastructure environments such as AWS and GCP
- Provide escalation support for critical incidents and major project deliveries
- Coordinate with third-party vendors and manage solution implementation
- Collaborate with Japan business teams, IT departments, and global technology teams
- Identify and implement continuous improvements for network services
- Perform additional tasks required to enhance network reliability and service quality

Required Skills:
- Extensive experience in network design, implementation, and operations within large enterprise environments
- Hands-on experience with:
- Routing and switching
- Wireless networking
- Firewalls
- Load balancers
- Proxies
- DNS and DHCP
- Experience with Software Defined Networking (SDN) solutions, such as:
- Juniper Mist
- Cisco ACI
- Experience supporting cloud infrastructure environments including AWS and/or GCP
- Experience working with complex domestic and global network environments (200+ sites)
- Strong troubleshooting, analytical, and problem-solving skills
- Ability to communicate effectively with both technical and non-technical stakeholders
- Proficiency with Microsoft Office tools
- Strong business communication skills in English

Why apply to this position:
- Opportunity to participate in a large-scale project planned for 3+ years
- Work with international teams in a global environment
- Gain experience in enterprise-level cloud migration projects
- Develop expertise in the latest network and cloud technologies
- Build advanced technical experience within a large-scale global infrastructure environment


Company Overview:
Our client is the Japanese subsidiary of a leading global insurance group operating across more than 130 countries and regions.
The company provides a wide range of insurance services to corporate, institutional, and individual customers and operates one of the world’s largest property and casualty insurance networks.
In Japan, the IT services organization provides infrastructure, application, and technology support services to group companies, enabling reliable and innovative business operations.

Working Hours: 9:00 AM – 5:00 PM
Working Style: Hybrid Work ( WHF1 day/week)
Location: Tokyo, Japan
Holidays: Saturdays and Sundays, National holidays, Year-end and New Year holidays, Paid leave, Other special holidays
Benefits: Full social insurance coverage, Defined Contribution (DC) pension plan, Transportation allowance, technical training programs, Certification exam reimbursement/support program, Various employee benefits