Đình Mác Lưu

Experienced System Engineer specializing in Linux, virtualization, storage, and cloud infrastructure. Proven ability to troubleshoot critical systems, automate operations, and maintain high availability environments. Experienced in building and operating self-hosted Kubernetes environments with GitOps, CI/CD automation, and observability platforms.

Deputy IT Infrastructure Lead / Infrastructure Engineer - Saigon Precision

(2026-03)

• Designed, implemented, and optimized enterprise monitoring systems using Zabbix and Grafana deployed via Docker Compose and Ansible
• Developed custom monitoring dashboards in Grafana without using prebuilt templates, including customized visualization for infrastructure, servers, and network devices.
• Implemented real-time network topology and bandwidth monitoring using Grafana Network Weathermap plugin to visualize traffic flow and connectivity between network devices.
• Customized Zabbix metrics, monitoring parameters, triggers, and alert thresholds to improve infrastructure observability, monitoring accuracy, and incident detection efficiency.
• Integrated monitoring and alerting systems with Microsoft Teams using Teams Workflows and webhook-based notification pipelines.
• Managed and maintained firewall systems, VMware virtualization infrastructure, Active Directory, VPN systems, Microsoft Intune (basic administration), and internal IT infrastructure services.
• Manage virtual machines and migrate them from VMWare on-premise to a CMC cloud environment.
• Managed backup and disaster recovery operations using Veeam Backup & Replication, including offsite backup strategies with S3-compatible object storage.
• Monitored backup integrity, retention policies, and recovery validation procedures to ensure infrastructure reliability and business continuity.
• Administered VMware virtual machines running Oracle Database and Microsoft SQL Server workloads, including monitoring, maintenance, and operational support.
• Managed IT asset inventory including PCs, network devices, and server room equipment.
• Coordinated daily operations and technical support activities for the helpdesk team.
• Proposed and implemented operational improvements, technical documentation, and team upskilling initiatives to improve troubleshooting capability and infrastructure management efficiency.

Systems Deployment Engineer - Thi Thien Solutions Technology Corporation

(2023-11 - 2026-03)

• Deploying SQL Server Failover Cluster Instance (FCI): Configured high availability for SQL Server 2022 on Windows Server 2022 across 2-node clusters.
• Storage Management (HPE MSA 2060): Implemented iSCSI Direct Attach, MPIO, and Storage Tiering (SSD/HDD) to optimize performance and redundancy.
• Disaster Recovery: Successfully restored critical database services by reconfiguring SAN volumes and Cluster nodes after a major storage hardware failure.
• Recovered ESXi 8 root access for Post Office General Hospital, restoring critical hospital systems after 10 days of outage within 2 hours, preventing further operational disruption.
• Recovered ESXi 7 password for Vietsovpetro Resort Ho Tram, helping the resort's system to resume operation (processing time (Downtime less than 1 hour).
• Resolved HA synchronization issues on a production HPE SimpliVity cluster for Saigon Giai Phong Newspaper.
• Troubleshoot and replaced server, SAN, and tape library hardware, ensuring minimal service downtime.
• Install, configure, test, and troubleshoot customer systems including VMware, Proxmox, Linux, Windows Server, and domain controllers.
• Install and configure Servers, SANs, and Tape Libraries.
• Performing troubleshooting tasks such as password reset and IP reset for IBM flash systems (v5000, v7000, v3700).
• Diagnosed and resolved complex hardware/software issues for SAN storage systems (Dell, IBM, 3PAR, MSA) ensuring 99.9% system uptime.
• Troubleshot and rebuilt RAID arrays following disk failures, ensuring data integrity and system recovery.
• Handling firewall, switch, and network issues for customers, including server
• Supporting Hung Vuong Hospital in installing and configuring VMWare ESXi 8. Installing and configuring Oracle Linux and Oracle database.
• Installed CUDA drivers and configured TensorFlow, PyTorch, and Jupyter Notebook with GPU support for AI/ML workloads.
• Support rebuilding RAID for customers

Freelance System Engineer - Freelance

(2025-04 - 2025-04)

Short-term engagement (April 2025) and short-term engagement (October 2025):

• Troubleshot Kubernetes cluster issues preventing worker nodes from joining the cluster.
• Restored production workloads by redeploying existing Kubernetes manifests and configurations.
• Troubleshot OpenStack deployment issues during installation using Kolla-Ansible.
• Investigated service startup failures, configuration errors, and dependency issues during deployment.
• Assisted in redeploying existing OpenStack configurations to successfully complete the deployment and bring services online.

IT Systems Specialist - Delta Engineering Corporation (Now is DEC Engineering Joint Stock Company)

(2020-09 - 2022-04)

• Deploy, upgrade, and configure network devices (WiFi, cameras, switches, routers, NAS, servers, thin clients).
• Implement a system for monitoring devices in a network using Zabbix, Grafana
• Implementing a CEPH distributed storage system for use with OpenStack and Proxmox.
• Deploy and operate the OpenStack system.
• Deployment and administration of Proxmox cluster systems.
• Installed Apache Guacamole Remote gateway.
• Deploy and operate a domain controller system.
• Build and operate a private cloud with Nextcloud and integrate SSO with ADFS.
• Integrated ADFS for Microsoft Office 365.
• Implement VDI using Windows Server for centralized storage with a thin client device for end users.
• Deploying and operating VMWare ESXi, Vcenter
• Configure firewall devices (Sophos, Fortinet, pfSense)
• Update the system with the latest patches.
• implemented High Availability (HA) architectures for MariaDB and PostgreSQL databases using HAProxy, Galera Cluster, and Patroni to ensure fault tolerance, load balancing, and automatic failover.
• Maintained computers, network devices, cameras and servers
• Server management, virtual machines, and data backup and restore
• Automated routine system administration tasks using Bash and Python, reducing manual effort by 80%.
• Write deployment documentation for administrators and user guides.
• Supported resolved network-related issues.
• Perform other tasks assigned by superiors.

System Operation - Berjaya Gia Thinh Investment Technology Joint Stock Company

(2019-01 - 2019-12)

System operation for Vietlott - Main responsibilities:

• Monitoring and checking the server and service systems.
• Perform daily and weekly backups to tape.
• Sent reports to relevant departments.
• Relocated tapes to PDC and DRC.
• Managed start and close systems for Vietlott.
• Installed mail server on CentOS 6.
• Operated OSS (Online Sell Server) on OpenVMS.
• Performing system operation tasks during lottery draws.

Operator (NOC) Trainee - ONLINE MOBILE SERVICES JOINT STOCK COMPANY (MoMo)

(2018-01 - 2018-08)

Main responsibilities

• Monitored servers and services (Nagios, Grafana, Web).
• Supported various departments (Customer Care, Product Development, Distribution System, Promotion).
• Performing tasks such as logging errors, handling user-reported or system-recorded issues.
• Monitors the company's network, keeps systems and services running and has no problems.
• Experience the work environment of the business