 After graduating from college, Williams worked as a teacher in Montezuma Creek, Utah, on the Navajo Reservation.She worked at the Utah Museum of Natural History from 1986–96, first as curator of education and later as naturalist-in-residence.Williams has testified before Congress on women's health, committed acts of civil disobedience in the years 1987–1992 in protest against nuclear testing in the Nevada Desert, and again, in March 2003 in Washington, D.C., with Code Pink, against the Iraq War.