Gregory has spent the last few years as a regular contributor to Bitcoin. He was a founding author to the bitcoin.org documentation, which is now widely utilized. He has worked extensively on the open source wallet GreenAddress, improving the privacy, security, and UX of the wallet. Now, at Blockstream, he is working on the core Bitcoin technology in addition to user-facing applications and proof of concepts. He is a Machine Learning Scientist by training, specializing in computer vision and statistical natural language processing, including deep learning systems. He holds a M.S. in Computer Science at the University of Maryland, and resides in his alma mater’s state. When given free-time he likes to cook, play board games, and get outdoors when he can.