In 2007 Williams joined the faculty of the College of Graduate and Continuing Studies at Norwich University, where he is a Professor in the Master of Arts in Diplomacy (MDY) program.
During the Administration of Jimmy Carter, Williams served for two years (1976 to 1982) in Washington, D.C., as a policy analyst and then special consultant to the Nuclear Regulatory Commission on matters relating to international proliferation.
He devoted years of study to the facts of his cousin's killing and the court trial of her alleged murderer, writing a true crime book about the affair entitled Washed in the Blood.
Williams's book made his cousin Betty the subject of magazine and newspaper articles across the southwestern United States.
In addition to his academic appointment at Austin College, Williams also serves as the founding president of the Osgood Center for International Studies.