Johnny Greco
Applied Scientist at NVIDIA
Earth, Texas, United States
Summary
🤩
RockstarJohnny Greco is a Principal Research Scientist with a decade of experience applying advanced ML and data science to production problems across startups and research institutions. He transitioned from a PhD in Astrophysics at Princeton into industry roles where he led R&D and applied science teams at companies like Gretel.ai, CalypsoAI, and Radiology Partners before joining NVIDIA. Johnny combines deep academic rigor with hands-on engineering—building privacy-preserving synthetic-data solutions, ML-driven healthcare analytics, and agent-based systems—while mentoring teams and shaping research-to-product roadmaps. Based in Columbus, Ohio, he’s equally comfortable prototyping novel algorithms and driving production-ready deployments, and brings an unusual blend of cosmology-trained quantitative thinking to practical AI engineering.
10 years of coding experience
Github Skills (60)
data-generation10
pytorch10
python10
astronomy10
core-library10
machine-learning10
multimodal10
astrophysics10
llm10
astropy10
audio10
nvidia10
deep-learning10
natural-language-processing10
nlp10
Programming languages (3)
Github contributions (5)
NVIDIA-NeMo/DataDesigner
Nov 2025 - Jul 2026
🎨 NeMo Data Designer: Generate high-quality synthetic data from scratch or from seed data.
Contributions:8 releases, 221 reviews, 53 PRs in 7 months
synthetic-dataagentic-aidata-augmentationdata-generationllm
johnnygreco/nerb
Mar 2022 - Mar 2022
Contributions:30 commits, 7 PRs, 117 pushes in 3 days
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