Jonathan Gammon is Non-Executive Director and Advisor at Instrumentation and Monitoring (I&M) specialists Geotechnical Observations Limited (GeO). He is a Chartered Civil Engineer and Chartered Geologist with almost forty-five years of international construction experience working for consultants and contractors.

Jonathan was Design Manager and Resident Engineer for West Rail (now part of the Tuen Ma Line) in Hong Kong and Sub-Surface Design Manager for the Reference Design of Dublin Metro North (now Dublin Metrolink) in Ireland. In the UK, his experience includes Crossrail, Thameslink (Blackfriars Station Redevelopment), 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 before working for more than two years on Phase One of the High Speed Two (HS2) railway between London and Birmingham as Head of Ground Investigations. Retiring from full-time work at the end of July 2017, he was Technical Director for Tunnelling and Geotechnics at CH2M (now Jacobs).

He is a UK Representative on the ISSMGE’s Technical Committee TC220 (Field Measurement in Geomechanics). At the end of 2019, he was responsible for establishing AGS’s Instrumentation and Monitoring Working Group (I&MWG; www.ags.org.uk). Together with GeO Owner and Managing Director, Andrew Ridley, Jonathan has provided a series of half-day training courses about I&M for the Geological Society.