The Gravitational Astrophysics Laboratory of the NASA Goddard Space Flight Center is seeking a postdoctoral researcher to support a laboratory study of optical metrology systems for use in future space-based gravitational-wave missions such as the Laser Interferometer Space Antenna (LISA). The postdoc will lead the design, assembly, and test of a laboratory prototype of an interferometric measurement system that can measure the position, tip, and tilt of a moving target with picometer and nanoradian precision band. The position is offered through the Universities Space Research Association (USRA) and the Center for Research and Exploration in Space Science and Technology (CRESST). The position is offered for two years, with extension beyond two years dependent upon future funding and mutual agreement. The Goddard Space Flight Center is located in Greenbelt, MD, a suburb of Washington, DC. To learn more, please visit the job posting on the USRA website or contact the research supervisor, Dr. Ira Thorpe at firstname.lastname@example.org.