Ethan Rosenthal

Ethan Rosenthal, PhD

Data Science Consulting


My goal is to empower your company to extract value from your data. Please reach out at - I would love to hear from you.

I offer a range of services for companies of all sizes. Whether you are an early-stage startup who has heard the buzz about data science but is unsure of how it works in practice or you are a mature company with an established data team and more projects than people, let’s talk.

As a PhD-trained physicist who subsequently spent years building and deploying production machine learning systems from scratch, I cover the broad spectrum of modern data science from mathematical modeling to production-ready software engineering. My key service areas include:

  • Machine Learning Products
  • Optimization and Automation
  • Analytics
  • Data Strategy and Vision
  • Recruiting and Hiring


Ethan Rosenthal, PhD is a New York City based data science consultant who empowers companies to extract value from their data. Prior to consulting, Ethan led a team of scientists, analysts, and engineers at Dia&Co, an online personal styling service. He was the founding member of the Data team which grew to 30+ people at a company that scaled from 70 to 700 employees during his tenure. In that time, he built numerous data applications to automate solutions to problems involving recommendations, logistics, deep learning, and more. Before Dia&Co, Ethan worked as a Data Scientist at Birchbox and earned a PhD in Physics from Columbia University building atomic-resolution microscopes to study superconductors.