According to the statement, Williams, since 2017, has served at the Defence Intelligence Agency (DIA) in Washington DC, as associate deputy director for Intelligence and Directorate for Operations, Xinhua news agency reported.
Williams has also been an adjunct associate professor at Georgetown University's School of Foreign Service since 2017, and was previously a senior adjunct professorial lecturer at American University's School of International Service from 2013 to 2016.
He earned his B.A. at the University of Pennsylvania in 1993 and M.A. at the George Washington University in 1996.
Afghan officials said earlier on Wednesday that more than 40 fighters had been killed in clash between government forces and the Taliban in the insurgency-battered nation over the past 24 hours.