Greg is an former US Air Force Officer and pilot, aerospace engineer, fighter/test pilot, MBA and NASA astronaut.
In 2008 he piloted STS-123 Endeavour, which was the 25th shuttle/station assembly mission. In addition to pilot duties aboard Endeavour, Johnson was a primary robotic arm operator, employing both the space shuttle and International Space Station robotic arms in support of numerous tasks throughout the mission.
Greg was also pilot of STS-134 Endeavour in 2011. This was the penultimate mission of NASA’s Space Shuttle Program and the final flight of space shuttle Endeavour. The 16-day mission was the 36th shuttle mission to the space station.
While at NASA, Johnson supported the Columbia Accident Investigation Board, was Chief of the Astronaut Safety Branch, Crew Representative for Crew Exploration Vehicle (CEV), a display designer for the Shuttle Cockpit Avionics Upgrade (CAU) program, Division Chief for External Communications/STEM, and was lead of ISS Visiting Vehicles Team before leaving NASA.
From 2013 – present day, Johnson is the President and Executive Director of the Centre for the Advancement of Science in Space (CASIS). The mission of CASIS is to maximise utilisation of the ISS National Laboratory by building commercial markets complementing NASA’s traditional projects to promote and facilitate new, innovative translational research, technology demonstration and STEM opportunities.
Greg is currently an aerospace consultant and STEM advocate.