Nguyễn Kiến Doanh
Technical Lead
A seasoned IT professional with a decade of experience in building, managing, and optimizing critical IT infrastructures. Specializing in VoIP, Networking, and high-availability server systems.
Experience
Technical Lead
PLS INTEGRATED TECHNOLOGY SERVICES
2017 – Present
VoIP System:
- Setup and operate IP PBX systems.
- Support end users with Finnone system, Click2Call, Autocall, etc.
- Set up and manage GSM gateways (2G, 4G) such as Dinstar.
- Operate VoIP-related systems: OpenSIPS, Asterisk, FusionPBX, Elastix, etc.
- Conduct training sessions on VoIP topics.
- Manage core Linux systems.
- Design and operate VoIP system architectures.
- Research and optimize IP PBX solutions.
- Support end customers using phone number services from various providers.
- Monitor VoIP systems using Grafana and Prometheus.
Network & System Administration:
- Manage firewalls and network infrastructure for core voice systems.
- Build and operate monitoring systems with Grafana and Prometheus.
- Administer routers (Draytek) and wireless APs (Unifi, Aruba).
- Basic experience with Cisco networking devices.
- Manage physical servers (Dell, HP, IBM) and backup systems (NAS).
- Operate and manage VMware vSphere environments and SAN storage systems.
- Troubleshoot and coordinate with partners (e.g., Viettel IDC, FPT IDC).
- Manage and monitor bandwidth usage for MPLS and FTTH lines.
User & Customer Support:
- Experience with JIRA ticketing system.
- Experience with CRM platforms (Getfly, Tel4VN).
- Provide technical customer support.
- Assist users with Google Workspace (email), internet, and software-related issues.
IT Support
SOCON VIETNAM
2016 – 2017
- Support users with zimbra email, internet, and other issues.
- Install and configure computer hardware and software.
- Troubleshoot network, printer, and system problems.
- Monitor IT systems and report incidents.
- Manage user accounts and access permissions.
- Work with other IT teams or vendors to resolve issues.
- Perform regular data backups and manage IT inventory.
- Maintain and update technical documentation.
- Train users on the Bitrix24 system.
- Assist in setting up IT equipment for new employees.
- Manage access points/WiFi APs (TPLink, Viettel).
Skills
VoIP Systems
Asterisk
OpenSIPS
Linux Administration
Network Security
pfSense
VMware vSphere
System Monitoring
Grafana
Server Hardware
SAN/NAS Storage
IT Support
JIRA
CRM
Projects
SIP Server Implementation
Built high-performance SIP servers for enterprise clients.
VPBank, FE Credit, SmartNet
Call Center Support
Provided multi-platform support (macOS, Windows).
Promotec, Venesa, GalaxyDr
System Quality Assurance
Designed and executed test scenarios for new banking systems.
CIMB Bank
