GEWEX is part of a larger scientific research program but also operates its own activities. It is one of the four core projects of the World Climate Research Programme, WCRP. WCRP’s Joint Scientific Committee, or JSC, is the body that develops the scientific agenda for WCRP and its projects, including GEWEX.

GEWEX receives guidance externally from the JSC, while internally its Scientific Steering Group (SSG) takes those recommendations and sets a more detailed course for the program. The International GEWEX Project Office helps to carry out the plans created by the Scientific Steering Group.