Senior IT Maintenance Engineer

Introduction of KDDI Vietnam Corporation
KDDI Vietnam is the Vietnam branch of KDDI, the second largest telecommunications company in Japan, and aims to contribute to industrial development in Vietnam through the development of telecommunications and IT infrastructure for private companies and support for public projects.
KDDI Vietnam has more than 20 years of business history in Vietnam and has extensive experience in supporting Japanese companies mainly in the industrial sector.
Most of our clients are Japanese companies, but we also have clients from Korea and other nationalities, Vietnamese domestic companies, and the government. And we have branch offices in various countries in Southeast Asia, and we utilize these networks to support our clients' global expansion.
Role Overview
We are also seeking a Senior IT Maintenance Engineer who is a maintenance professional and has the potential to become a Maintenance Team Manager in the future.
This role requires deep understanding of IT maintenance, strong troubleshooting skills, and the ability to educate, guide, and lead team members, while ensuring high-quality customer support.
Key Responsibilities
Advanced IT Maintenance & Customer Success
Take responsibility for stable operation of complex customer IT environments
Handle high-level incidents and perform root cause analysis
Act as a key technical contact for customers during operations
Ensure system performance, availability, and security
Supported Technologies
Network & Security (Routing, Switching, Firewall, Wireless)
Microsoft Server platforms, Microsoft 365, Azure
Virtualization (Hyper-V, VMware)
Backup and storage solutions
Endpoint and physical IT infrastructure
Team Development & Leadership
Mentor and train junior maintenance engineers
Review incident handling and maintenance quality
Improve maintenance procedures, standards, and documentation
Coordinate maintenance tasks within the team
Gradually take responsibility for team management and quality control