Aquarius is an international partnership mission. The key members and their roles are outlined below:
| Principal Investigator | Gary S.E. Lagerloef, Earth & Space Research (ESR) |
| Deputy Principal Investigator | David LeVine, Goddard Space Flight Center (GSFC) |
| Project Scientist | Tong (Tony) Lee of the Jet Propulsion Laboratory (JPL) |
| Aquarius Program Scientist | Eric J. Lindstrom (NASA HQ) |
| SAC-D PI | Sandra Torrusio of the Comision Nacional de Actividades Espaciales (CONAE), |
| Aquarius Operations Manager | Gene Feldman (GSFC) |
| SAC-D Operations Manager | Marcelo Oglietti (CONAE) |
| Sponsoring International Space Agencies |
