Andrzej Stewart is a Hardware Payload Systems Engineer, providing technical support to human research experiments aboard the International Space Station. He has previously served in flight operations for a wide variety of NASA missions, including the Spitzer Space Telescope, Juno, GRAIL, NASA's Mars orbiter fleet, and, most recently, Artemis I. He is also a 1st Lieutenant in the Civil Air Patrol, supporting CAP's Emergency Services mission as a Mission Pilot, Mission Check Pilot, and Airborne Photographer.

Andrzej earned degrees in Aerospace Engineering from the University of Texas at Austin and the Massachusetts Institute of Technology, and aspires to be a NASA astronaut. In pursuing that, he has served as the Flight Engineer of HERA C2M2, a two-week asteroid mission simulation at the Johnson Space Center; as Chief Engineering Officer of HI-SEAS IV, a year-long Mars simulation in Hawai'i; and as a test subject crewmember and Doppler/ultrasound technician for multiple Exploration Atmosphere studies in the 20-Foot Chamber at the Johnson Space Center.