Bob H

I am a senior data engineer with deep experience building and operating large-scale data platforms for ML and research. I have supported high-throughput training, evaluation, and production analytics for conversational models and helped scale data systems for mRNA vaccine research.

At OpenAI I worked on the data systems behind ChatGPT, owning pipelines that ingest multi-terabyte daily language datasets and building dataset versioning, validation, and lineage to ensure trustworthy training data. I partnered closely with researchers and ML teams to deliver feature-ready datasets, embedding and vector pipelines, and near-real-time streaming signals for safety and performance monitoring.

At Moderna I helped integrate experimental, genomics, and clinical data to enable reproducible research and predictive modeling in a regulated environment. I implemented data lineage, versioning, and auditability, and optimized availability and processing performance to accelerate analysis for vaccine R&D.

Earlier, I built enterprise healthcare data lakes and ETL pipelines with strong data quality and HIPAA-compliant controls while helping migrate systems toward cloud platforms. I focus on reliability, observability, cost efficiency, and enabling teams to trust and act on their data.