 David began her career in 1975 holding several positions at the Sandia National Laboratories in Albuquerque, New Mexico.She served as an adjunct professor at the University of New Mexico teaching adaptive and digital signal, digital and microprocessor system design, and linear least-squares estimation.In 1986, she was employed as the supervisor of the Data Systems Development Organization, responsible for developing a remote controlled digital system for deployment of underground nuclear tests at the Nevada Test Site.