Nat is co-founder and CEO of Flatiron Health, where he oversees all initiatives across provider solutions, life sciences, medical oncology, business development, sales operations and other corporate functions.

Before co-founding Flatiron Health, Nat was co-founder and CEO of Invite Media, an advertising technology company based in NYC. Invite Media built the industry's first enterprise advertising platform for buying and optimizing online media in real-time. Invite Media was acquired by Google in 2010.

Prior to Invite Media, Nat started numerous internet companies and also worked at Say Media and First Round Capital. An active angel investor, Nat has invested in over 30 technology startups throughout the country, including Bell Biosystems, Breakthrough, Care at Hand, DocPhin, Doctor Evidence, Genomera, Meddik, Oscar, and Predilytics.

Nat earned a Bachelor of Science degree cum laude in Economics with concentrations in Entrepreneurship and Marketing from The Wharton School of the University of Pennsylvania.