[1][2][3] On 15 July 1944, Williams married Mary Thorpe in Wellington, and the couple went on to have three children.
[1][3] Williams worked in the applied mathematics laboratory of the Department of Scientific and Industrial Research.
[1] During World War II, he worked at the University of California, Berkeley on the Manhattan Project in 1944–45 on the separation of uranium.
[3][4] After the war, he graduated from St. John's College, Cambridge with a Bachelor of Arts (1946) and PhD (1949).
[1] That year, he was appointed chair of the State Services Commission, based in Wellington, serving in that role until 1981.