Back Nutzlastspezialist German Spécialiste de charge utile French 搭乗科学技術者 Japanese Pakar muatan Malay Especialista de carga (NASA) Portuguese Специалист по полезной нагрузке Russian 载荷专家 Chinese
A payload specialist (PS) was an individual selected and trained by commercial or research organizations for flights of a specific payload on a NASA Space Shuttle mission. People assigned as payload specialists included individuals selected by the research community, a company or consortium flying a commercial payload aboard the spacecraft, and non-NASA astronauts designated by international partners.
The term refers to both the individual and to the position on the Shuttle crew.