Profile

10+ years in database administration, operations, and product development across SQL Server and MongoDB production environments. Has held sole end-to-end ownership of a product database environment covering operations, security, monitoring, backup/recovery, HA/DR, and migrations. Resourceful and quick to adapt, with a wide technology range built up by solving real problems as they arose.

Brings a security-first mindset, building hardened internal tools and access controls where commercial options fall short. Goes beyond administration into engineering: TypeScript/Node.js services, event-driven workflows, n8n automation, and applied AI tooling for operational acceleration. Currently extending into AI agent development: agent harness engineering, bot integrations, and context-driven workflows across multiple LLM tools.

Maintains a personal homelab running 50+ self-managed Docker containers. Interested in CVE research and security of Linux and self-hosted tooling.

Drawn to constrained problems that need creative solutions. Comfortable owning complex cross-team projects: aligning teams, planning execution, preparing backup plans, and sharing knowledge through informal sessions or workshops.

Work History

Staff Product Database Administrator

– 4 yr 2 mo
LUMIPLUS Solutions

Sole DBA with full production access across 20+ MongoDB instances spanning multiple data centers.

Scope
  • Owned the full MongoDB lifecycle across all environments: deployment, monitoring, backup/recovery, HA/DR, and production troubleshooting.
  • Owned data services: ETL pipelines in Node.js/TypeScript, BI reporting on the Microsoft BI stack, and workflow automation with n8n.
  • Mentored new DBAs and authored technical documentation on MongoDB administration, HA/DR practices, and database access control.
  • Collaborated with cross-region DBA and DevOps partners on server management.
Impact
  • Cut deployment time from 30+ minutes to under 5 minutes; automated the deployment process for 100+ databases.
  • Led infrastructure and data migrations with no production incidents: two cross-IDC moves (2023: 2+ TB, 2025: 4+ TB) and a multi-application platform merge across 100+ collections.
  • Designed an in-house MongoDB BK/HA/DR system: data-bearing replica sets, physical and oplog backups, isolated backup nodes, and point-in-time recovery.
  • Built CompassWeb, a secure internal self-service MongoDB access tool with OAuth2 SSO and Unix socket isolation.

Senior Product Database Administrator

– 1 yr 9 mo
LUMIPLUS Solutions

Sole DBA of the product department, transitioned from SQL Server production operations into MongoDB with no prior experience.

Scope
  • Owned database infrastructure, data schema development, and early deployment tooling.
  • Collaborated with cross-functional product teams on data schema design and aggregation feature work.
Impact
  • Self-taught MongoDB from zero and deployed 3 production HA replica sets within 2 months of joining.
  • Executed major MongoDB version upgrades on production replica sets with no downtime via rolling upgrades.
  • Designed the database schema deployment workflow that became the foundation for the full automation system built during the Staff Product DBA period.

Senior Production Database Administrator

– 2 yr 3 mo
NEXCEL Solutions

Took on larger SQL Server infrastructure and tighter cross-region coordination on top of prior Production DBA work. First to bring new tech into the DBA stack (Ubuntu, MySQL, Neo4j, custom monitoring).

Scope
  • Owned full production SQL Server operations and DR cluster maintenance: schema review, feature deployments, and cross-environment work.
  • Owned database delivery on greenfield internal projects end-to-end, supporting adjacent areas as needed.
  • Coordinated tightly with the cross-region DBA team and local DevOps on a shared production environment.
Impact
  • Built the DBA team's primary SQL Server monitoring dashboard from scratch (typeperf + SQL Server + Grafana), covering all production instances; still in active use today.
  • Coordinated the database side of semi-annual DR drills across 3+ product teams: executed drill items, supported QA and dev teams in parallel, and reported real-time status to the drill PM.
  • Built a cross-DBMS data bridge between SQL Server, MySQL, and Neo4j via Linked Server, enabling live queries.

Production Database Administrator

– 7 mo
NEXCEL Solutions

Carried broader production-DBA scope across multiple projects, gatekeeping deployments alongside operations, scripting, and data-pipeline work.

Scope
  • Quality-gated production releases through pre-deployment T-SQL code reviews and performance tuning across multiple projects.
  • Co-maintained the SIT cluster alongside a cross-region team, growing from local test instances into broader monitoring and replication responsibilities.
Impact
  • Rebuilt inherited archive pipelines to process ~20M records reliably.
  • Initiated a pure-T-SQL monitoring visualization tool (SVG-chart emails) when no off-the-shelf tooling was adopted; precursor to the team's later Grafana stack.
  • Authored the team's T-SQL coding standard to anchor pre-deployment reviews and lift codebase quality across projects.

Database Administrator

– 1 yr 10 mo
NEXCEL Solutions

Started as Assistant DBA, growing into core database-development work across team projects.

Scope
  • Owned T-SQL development: stored procedures, views, functions, triggers, schema design, and performance tuning.
Impact
  • Delivered a configuration-system rebuild end-to-end: collapsed multi-row INT records into single-row BINARY encoding to eliminate lock escalation and deadlocks, then migrated 1M+ records to production in reviewed batches under senior DBA lead oversight with no incidents.
  • Leveled up code quality by bringing Git into the team's DBA workflow and applying T-SQL conventions and best practices.

Education & Certifications

Engineer's Degree
Computer Science
Ho Chi Minh City University of Technology (HCMUT)
2015