Rex Sumsion
Software Engineer at Health Catalyst Inc
Summary
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SeniorRex Sumsion is a Director-level AI engineer with 8 years of experience building reliable, large-scale ML and data platforms and leading cross-functional teams. He combines a Georgia Tech MS in Computer Science (Machine Learning) with hands-on expertise in MLOps, LLMOps, DataOps, PySpark, Terraform, and AWS to deliver resilient SaaS RAG products and multi-cloud deployments. Rex led technical direction on an $80M+ AWS migration for a trillion-dollar asset manager and drove a 9x increase in delivery efficiency through automation and best practices. He’s known for zero-production-outage engineering of enterprise AI services and for designing AI agent architectures that are model-provider agnostic. Beyond technical delivery, he builds high-performing teams, aligns engineering with product strategy, and pioneers responsible-AI practices that improve model efficiency and data quality. Based in Utah, he pairs deep technical craft with mentorship and a practical focus on making AI systems auditable and production-ready.
9 years of coding experience
Github Skills (23)
r10
machine-learning10
crossword9
python8
perl8
chatgpt7
typescript7
ai7
openai6
anthropic6
gemini6
metaprogramming6
generative-ai6
open-source6
llm6
Programming languages (3)
Github contributions (5)
byubrg/CAMDA_CMAP_Challenge
Jan 2018 - Jul 2018
Contributions:42 commits, 25 PRs, 20 pushes in 5 months
glenrs/WishBuilder
Feb 2018 - Mar 2018
Please visit this page for a description of this project:
Contributions:62 pushes, 32 branches in 1 month
visitjavascript
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