John Hubbard is a principal software engineer at NVIDIA, specializing in Linux kernel development, Open Source Software, and CUDA. He has worked at NVIDIA since just after the CUDA 1.0 release in 2007. Before that, he served eight years as an Unrestricted Line Officer in the U.S. Navy submarine force, culminating in a tour as Combat Systems Officer ("Weps") of the USS Bluefish (SSN 675).