SG

Sivakumar Gandhirajan

Database Engineering Leader | Multi‑Cloud | HA/DR, Hybrid Governance, and AI‑enabled Data Platforms

Azure Database Administrator Google Cybersecurity Professional MongoDB Atlas Admin
Azure Admin AssociateAzure AI FundamentalsSnowPro Associate

Featured Win

SQL + AI Datathon Winner

ClinIQ

SQL-native clinical intelligence RAG app that answers natural-language questions with grounded evidence from PubMed and ClinicalTrials.gov.

Built independently for the SQL + AI Datathon using SQL Server 2025 native vector search, FastAPI, Data API Builder, and GitHub Models. The core design kept semantic retrieval and structured filtering in one SQL-centric system, which made the architecture simpler, easier to reason about, and more reliable.

View ClinIQ on GitHub
Personal project built independently and designed to make clinical retrieval more practical with SQL-native vectors.
Grounded answers with citations across the full workflow
Semantic search and relational filtering in the same SQL system
Embeddings kept close to operational data for simpler retrieval
Personal hackathon project at the intersection of SQL, AI, and clinical intelligence
SQL Server 2025FastAPIData API BuilderGitHub ModelsPubMedClinicalTrials.gov

Database Engineer

  • Modernized 30+ SQL servers/400+ DBs to SQL Server 2022; Always On AG, TDE, TLS 1.2+; >$70K/year savings.
  • Migrated a 5-node MariaDB Galera cluster to AWS RDS via Terraform; low-downtime cutover; ~$35K/year cost reduction.
  • Enabled hybrid governance with Azure Arc (ATP, Vulnerability Assessment, best-practice checks) across on‑prem DBs.
  • Architected Azure PostgreSQL Hyperscale (Citus) MPP for geospatial analytics; ARM-provisioned and tuned for bursty workloads.

Recent Impact

SQL Server modernization
HA/DRCost savings
30+ servers / 400+ DBs

Upgraded to SQL Server 2022 with Always On AG, TDE, TLS 1.2+; improved RTO/RPO and unlocked >$70K/year savings.

MariaDB to AWS RDS
IaCMigration
~$35K/year savings

Terraform-orchestrated migration from 5-node Galera to managed RDS; low-downtime cutover and automated operations.

Hybrid governance via Arc
GovernanceSecurity
ATP + VA enforced

Centralized Defender/ATP and Vulnerability Assessment across on-prem DBs with Azure Arc for secure posture.

Azure Postgres Hyperscale
AnalyticsPerformance
Geospatial MPP

Provisioned Citus for bursty analytics; ARM-based deployment and tuning for risk modeling workloads.

Let's Connect

Open to discussing database architecture, AI engineering, or new opportunities.

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