former technical director of tunnelling and geotechnics at CH2M (retired),
Jonathan Gammon retired at the end of July 2017, at which time he was Technical Director for Tunnelling and Geotechnics at CH2M.
A Chartered Civil Engineer and Chartered Geologist, he had almost forty-five years of international construction experience working for consultants and contractors. In the UK, his tunnelling experience encompassed a broad range of projects, from the Cooling Water Outfall Tunnel for the Redcar Steelworks in the 1970s to the River Humber Tunnel and related works currently under construction. He has been responsible for the investigation, specification, procurement, implementation, instrumentation and monitoring, and maintenance of tunnels.
Jonathan was Design Manager and Resident Engineer for tunnel and underground station works for West Rail in Hong Kong and was Sub-Surface Design Manager for the Reference Design of Dublin Metro North in Ireland. His experience in London includes Crossrail, Thameslink (Blackfriars Station Redevelopment), Tideway Tunnels, and the Northern Line Extension (for which he was the Expert Witness, Engineering at the Public Inquiry). He was Design Project Manager for the Bond Street Station Upgrade in Central London.
Jonathan spent more than two years working on High Speed Two (HS2) as Head of Ground Investigations. The scope of that work included tunnels and related works of varying configurations and lengths in widely differing ground conditions over the 230km length of Phase One of HS2 between London and Birmingham.
As well as continuing to be a member of the British Tunnelling Society, Jonathan remains actively involved with the UK Chapter of the Hong Kong Institution of Engineers and the UK Branch of Engineering New Zealand, of which he is a Fellow.