A GNSS (Global Navigation Satellite System) job involves working with satellite-based positioning, navigation, and timing technologies. Professionals in this field develop, maintain, and improve GNSS systems for applications such as surveying, mapping, transportation, and autonomous vehicles. They may work with GPS, Galileo, GLONASS, or BeiDou systems to ensure accurate and reliable location-based services. Roles can range from software development and signal processing to hardware engineering and data analysis, depending on the industry and specialization.