Program executives are assigned to spacecraft development missions in the Science Mission Directorate (SMD). We represent the mission at NASA Headquarters (HQ) and to all of the stakeholders who continuously need data and make decisions about the mission. We serve as an advocate and an enforcer for each mission, which may be under development at a NASA field center or other external organization or in science operations. We continually oversee the progress made by the mission. We also ensure that the mission has access to all of the resources they need, and are prepared for the various stages of development and gate reviews between phases. We are the mission's eyes, ears and legs at NASA HQ. Currently, I am the Program Executive for LADEE, JUICE (the European Space Agency's JUpiter's ICy Moons Explorer), and Europa Clipper.