JUSTIN
SEONYONG
LEE


Education


Harvard University

Master of Science, 2019 - Computational Science and Engineering

Columbia University

Bachelor of Science, magna cum laude 2017 - Applied Mathematics, Minor in Computer Science

Thomas Jefferson High School for Science and Technology

Advanced Studies Diploma 2013

Work Experience


Lila Sciences, Cambridge, MA but working remotely

   Staff Machine Learning Engineer (Jan. 2026 - Present)

Lila Sciences is building scientific superintelligence. I work on the AI research team that is developing Lila's foundation models for scientific discovery.

Cohere, New York, NY

   Senior Member of Technical Staff (June 2025 - Jan. 2026)

   Member of Technical Staff (Dec. 2023 - June 2025)

Cohere builds enterprise large language models (Command A, Command R7B) and multimodal embedding models. I was on the Applied Machine Learning team, where I trained custom LLMs for Cohere's clients for RAG, agentic, and multilingual use cases.

Among other efforts, I was the modeling lead for Cohere's partnership with LG CNS, the consulting and services division of the LG Corporation. Our team optimized LLMs for SOTA performance on both academic and custom Korean-language enterprise benchmarks. I was also on the core team that developed Command R7B Arabic, a SOTA 7-billion parameter LLM for English and Arabic use cases. Our report on this model was accepted to the AfricaNLP Workshop at ACL 2025.

Sumitomo Pharma America, New York, NY

   Senior Manager, Digital Innovation (Feb. 2020 - Nov. 2023)

Sumitomo Pharma (formerly Sumitovant) is a pharmaceutical company. I worked in Digital Innovation, a team of business-facing data scientists and software engineers. Some projects I deployed include:

• Search and visualization of document embeddings generated from large corpora of scientific abstracts
Applying sequence classification to information extraction from scientific abstracts
• an OCR tool that extracts scientific data from publications/reports

SimpleBet (now part of DraftKings), New York, NY

   Data Scientist (Jan. 2019 - Jan. 2020)

SimpleBet (acquired by DraftKings in 2024) was a startup developing predictive analytics for the sports betting industry. As a Data Scientist, I developed statistical models that predicted in-play (e.g. per at-bat/drive) and game outcomes in professional sports games, along with tools and techniques for evaluating the models in various settings.

Internships and Teaching


Harvard University, Cambridge, MA. Teaching Fellow, Data Science 1 (Fall 2018)

Perceptive Automata, Somerville, MA. Computer Vision and Data Science Intern (Summer 2018)

DecisionQ, Arlington, VA. Software Engineering Intern (Summer 2017, Winter 2018)

Morgan Stanley, New York, NY. Technology Summer Analyst (Summer 2015, Summer 2016)

PDT Partners, New York, NY. Summer Technology Analyst (Summer 2014)

    © 2026 Justin S. Lee