The world has lost a quiet pioneer of modern technology with the passing of Gladys West, a mathematician whose groundbreaking research played a critical role in the development of the Global Positioning System (GPS). West died at the age of 95, leaving behind a legacy that continues to shape daily life across the globe.

Born in rural Virginia, West grew up in a time when opportunities for women — especially Black women — in science and mathematics were limited. Through determination and academic excellence, she earned a degree in mathematics and went on to work at the Naval Surface Warfare Center in Dahlgren, Virginia. There, she became one of the few women and African American scientists contributing to advanced military and satellite research during the Cold War era.

West’s work focused on creating highly accurate mathematical models of the Earth’s shape, known as geodesy. Using early supercomputers, she helped develop precise calculations of the planet’s surface, data that became essential to satellite positioning technology. Those calculations laid the foundation for GPS, which today supports everything from navigation apps and agriculture to emergency response and aviation.

For decades, West’s contributions remained largely unknown to the public, as much of her work was conducted behind the scenes in government research. In later years, however, she received long-overdue recognition for her achievements, including induction into the U.S. Air Force Space and Missile Pioneers Hall of Fame. Educators and scientists often point to her story as an example of perseverance, innovation, and the impact of STEM education.

Today, GPS technology is woven into everyday life — guiding drivers, helping farmers map crops, assisting search-and-rescue teams, and even enabling the smartphones people carry in their pockets. Much of that progress can be traced back to the detailed calculations and scientific dedication of Dr. Gladys West.

As news of her passing spreads, tributes continue to highlight not only her scientific contributions but also the doors she helped open for future generations of women and minorities in science, technology, engineering, and mathematics. Her life’s work stands as a reminder that some of the most important advances in modern technology come from individuals whose names are only later recognized, even though their impact is felt worldwide.