 Initially, she worked as a scientist in the Sensors Group under Dr. Antony Jeevarajan, researching and developing oxygen, carbon dioxide, and pH sensing techniques for monitoring the health of cell cultures that would be grown on the space shuttle or station.In 2002 she became a scientist with the Neurosciences Group under Dr. Bill Paloski, which studies the effects of space flight on balance control problems which astronauts experience upon return to Earth, and develops possible countermeasures that will help astronauts to adapt more quickly to both the microgravity of space and the 1-g environment on Earth.As of 2011, Hwang is working with the Integrated Science & Engineering (ISE) Group at Wyle's Houston office as Exercise Physiology and Countermeasures Project Manager.