[2] Williams spent 35 years working for NBRI, which later became part of the Council for Scientific and Industrial Research (CSIR).
[2] Williams co-authored the 1973 Revised guide to soil profiling for civil engineering projects in Southern Africa[2] with Jere Jennings and Tony Brink.
This work was extended in the 1982 book Soil survey for engineering[3] co-authored with Tony Brink and Tim Partridge.
Williams, Terry Pidgeon and Peter Day also collaborated on a 1985 paper on expansive clays.
This has importance for South African slopes assessment, in contrast to the common overseas practice of using peak strength for analysing ‘first time’ slides.