National Aeronautics and Space Administration
Mr. Arnold is an astronaut at NASA. After completing his graduate work at University of Maryland in Marine Science he began his career as an Oceanographic Technician at the U.S. Naval Academy. Mr. Arnold went on to teach science to middle and high school students nationally and internationally for the next 15 years. In 2004 he was selected as a Mission Specialist by NASA and in August 2007, he completed aquanaut training and served as a mission specialist on a joint NASA-NOAA mission, NEEMO 13 (NASA Extreme Environment Mission Objectives), where he lived and worked in and around Aquarius - the world’s only undersea laboratory. In 2009 Arnold was a crew member on the launch of the Discovery, which included a mission to the International Space Station.