The Management Committee

Information about the Management Committee

Chris Gaffney


since 15 Sep 2017 (chair at

Chris Gaffney is Head of Archaeological & Forensic Sciences at the University of Bradford. His doctoral research was conducted under Arnold Aspinall at Bradford on the Schlumberger resistance array, investigating its suitability for archaeological surveys. On leaving academia he worked in the commercial sector, including 18 years at GSB Prospection (in Bradford), which he led together with John Gater. And yes, he did appear in Time Team!

Gregory Tsokas


since 18 Sep 2015 , re-elected 15 Sep 2017

Gregory Tsokas is Professor of Exploration Geophysics since 12/2000 at the Geophysical Laboratory, School of Geology , University of Thessaloniki, Greece.

Chrys Harris


since 15 Sep 2017

Chrys is currently a Director of Magnitude Surveys Ltd, a social enterprise and specialist archaeological geophysics contractor to the community, public outreach and commercial sectors. Her passion for archaeological geophysics developed during her BA degree (Anthropology – emphasis in Archaeology) at Minnesota State University Moorhead in the United States. This lead her to pursue the specialised MSc in Archaeological Prospection at the University of Bradford in the United Kingdom.

Armin Schmidt

Honorary Secretary

since 15 Sep 2017

Although my earliest aspirations were to become an 'inventor' (a suitably broad job description), my fascination was always with history and ancient civilisations. However, in the end the natural sciences got the better of me and in 1982 I began to study Physics at the University of Technology Munich (Technische Universität München). One of the key events for me during that time was a seminar given by Helmut Becker in which he described the amazing results from archaeological prospection using Caesium magnetometers. I was hooked.

James Bonsall

Conference Secretary

since 15 Sep 2017

James is an archaeological geophysicist working in both the academic and private commercial sectors, with specialisms in the use of legacy data; 4D time-lapse assessments; the application of electromagnetic induction for the assessment of archaeological sites within challenging environments and variable geological backgrounds; induced polarisation, upland archaeology; conflict archaeology and archaeological deposits threatened by coastal erosion.

Immo Trinks

Conference Vice-Secretary

since 15 Sep 2017

Immo Trinks is the vice director of the  Ludwig Boltzmann Institute for Archaeological Prospection and Virtual Archaeology (LBI ArchPro) and key researcher of Propramme Line 2 - Archaeological Geophysical Prospection.

Kayt Armstrong


since 15 Sep 2017 (editor at

Kayt Armstrong is currently a PDRA on a landscape archaeology project at Durham University looking at the impacts of the Great Depression on the north east of England. She completed her BA at Southampton and went on to take an MSc there in Archaeological Computing, before doing her PhD in archaeological geophysics at Bournemouth University. Since then she has worked on landscape archaeological projects in Italy and on Crete, specialising in ‘difficult’ geophysical surveys in challenging environments, as well as a recent stint in commercial archaeology in the UK.

Paul Johnson

ISAP Fund Secretary

since 15 Sep 2017 (isap-fund at

Dr Paul Johnson studied for a BA in Archaeology at the University of Southampton, at which time he began his interest in archaeological geophysics, subsequently receiving an MA and PhD in Roman Archaeology from the same institution. During the course of these studies, in additition to working as a commerical archaeological geophysicist, he used geophysical survey and remote sensing as part of a number of projects at the Universities of Southampton and Cambridge, as well as for English Heritage, and the British School at Rome.

Paul Linford


since 1 Jan 2014 (treasurer at

Paul Linford is the leader of the archaeological geophysics team at Historic England, UK.

Rob Vernon


since 13 Sep 2003

Rob Vernon was born in Liverpool in 1945. He graduated in 1969 with a BSc (Hons) in geology from London University. Between 1969 and 1993 he held a variety of senior posts as a geologist in the British coal industry (deep mines), where he became familiar with downhole geophysical logging and seismic surveying. After leaving the coal industry, Rob gained an MSc in Archaeological Prospection in 1995, from the Department of Archaeological Sciences, University of Bradford where he continued to conduct part-time research on the geophysical responses produced by British smelting sites.