Len Threadgold graduated in Civil Engineering from Liverpool University and, following research there, worked on airfield and bridge design and on construction sites. Since 1965, when he joined Cementation’s Site Investigation department, he has been deeply involved with the investigation of the ground onto, into or below which all Civil Engineering work is constructed; this is his passion. He joined Exploration Associates in 1973 as Chief Engineer and in 1979 he set up his own consultancy in Site Investigation and Geotechnical Engineering, expanding it to establish a consultancy in Hong Kong. In 1983 he established Geotechnics Limited and continues to work at their office in Coventry. The Company undertakes Site Investigation and Geotechnical Consultancy and is a leading independent specialist with additional offices in Chester, Exeter and Yorkshire.
Len has been Chairman of the ICE West Midlands, the Midland Geotechnical Society, has served on the Géotechnique Advisory Panel and on the committee of the BGS (now BGA) and AGS. He stimulated and chaired the working party that produced the AGS Format for software-independent transfer and storage of data on ground conditions. In 2017 he was awarded the John Mitchell Medal by the BGA and ICE “For excellence in geotechnical practice” and presented the associated lecture in January 2018. He is a member of the panel of RoGEP and is registered at Adviser level. He has written numerous articles, some papers and has done many presentations to professional groups and Universities.