 He is qualified as a Space Shuttle and Space Station Robotic Arm Operator, Capsule Communicator (CAPCOM), and Instructor Astronaut for Extravehicular activity (EVA) training at the Neutral Buoyancy Laboratory.In July 2006, Feustel served as an aquanaut during the mission aboard the Aquarius underwater laboratory, living and working underwater for seven days.In October 2006, Feustel was announced as a crew member for STS-125, the final Hubble servicing mission by the Space Shuttle.