Taber MacCallum is the co-founder, Chief Executive Office and Chief Technology Officer of Paragon Space Development Corporation
Taber was the Principal Investigator on four microgravity experiments on the Space Shuttle, Mir Space Station and International Space Station using Paragon's patented Autonomous Biological System, a long duration plant and aquatic animal life support system and has supported numerous other biological experiments on the Space Shuttle and International Space Station. He conceived and is involved in the design of a Mars space suit portable life support system technology funded by NASA, life support and thermal control systems for commercial manned orbital and suborbital spacecraft, as well as hazardous environment life support technology for U.S. Navy divers. In 2008, Popular Science named MacCallum Inventor of the Year.
Prior to Paragon, he was a founding member of the Biosphere 2 Design, Development, Test and Operations team, and a crew member in the first two-year mission. He was granted a patent  for the analytical systems of Biosphere 2. MacCallum was responsible for the design, implementation and operation of the atmosphere and water management systems as well as the self-contained paperless analytical laboratories for Biosphere 2 that tested air, water, soil and tissue. As a crew member he served as Safety Officer, Assistant Medical Officer and Analytical Chemist, responsible for operation of all the analytical systems and much of the medical analysis and health monitoring systems.
MacCallum’s training for Biosphere 2 led him to work on a research vessel, eventually holding every level of command, sailing to over 40 ports and over 30,000 miles around the world. Training in Singapore, he became certified as a Dive Controller and Advanced Open Water Diving Instructor. He served as Dive Master for a project to reintroduce two captive dolphins to the wild.