Geochemists are scientists who study the chemical composition of the Earth and its processes. They analyze rocks, minerals, soil, and water to understand how chemical elements interact and change over time. This information helps in areas like natural resource management, environmental protection, and understanding geological hazards. These professionals often use advanced techniques and instruments, such as mass spectrometers and chromatography, to conduct their research. Their work can contribute to fields like environmental science, petroleum geology, and mineral exploration, providing valuable insights into the Earth's systems and resources.