Joseph Michael "Joe" Acabá (born May 17, 1967) is a Puerto Rican educator, hydrogeologist, and NASA astronaut. In May 2004 he became the first person of Puerto Rican heritage to be named as a NASA astronaut candidate, when he was selected as a member of NASA Astronaut Training Group 19. He completed his training on February 10, 2006, and was assigned to STS-119, which flew from March 15 to 28, 2009, to deliver the final set of solar arrays to the International Space Station. Acabá served as a flight engineer aboard the International Space Station, having launched on May 15, 2012. He arrived at the space station on May 17 and returned to Earth on September 17, 2012. Acaba returned to the International Space Station in 2017 as a member of Expedition 53/54. In 2023, Acaba was appointed the Chief of the Astronaut Office. Early years Acaba's parents, Ralph and Elsie Acabá, from Hatillo, Puerto Rico, moved in the mid-1960s to Inglewood, California, where he was born. They later moved to Anaheim, California. Since his childhood, Acaba enjoyed reading, especially science fiction. In school, he excelled in both science and math. As a child, his parents constantly exposed him to educational films, but it was the 8-mm film showing astronaut Neil Armstrong's Moon landing which really intrigued him about outer space. During his senior year in high school, Acaba became interested in scuba diving and became a certified scuba diver through a job training program at his school. This experience inspired him to further his academic education in the field of geology. In 1985, he graduated with honors from Esperanza High School in Anaheim. Education In 1990, Acaba received his bachelor's degree in geology from the University of California, Santa Barbara and in 1992, he earned his master's degree in geology from the University of Arizona. Acaba was a sergeant in the United States Marine Corps Reserve where he served for six years. He also worked as a hydrogeologist in Los Angeles, California. Acaba spent two years in the United States Peace Corps and trained over 300 teachers in the Dominican Republic in modern teaching methodologies. He then served as island manager of the Caribbean Marine Research at Lee Stocking Island in the Exumas, Bahamas. Upon his return to the United States, Acaba moved to Florida, where he became shoreline revegetation coordinator in Vero Beach. He taught one year of