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Technology Fellows

Technology Fellows have leading authority, both nationally and internationally, in their technical field. Each has made significant impact through technical excellence, expertise and knowledge transfer, and is committed to the development and coaching of colleagues. Fellows are selected by the TWI Executive Team.



Isabel Hadley

Isabel’s higher education was at Cambridge and Sheffield universities. She joined TWI in 1992 after working in several fields including nuclear engineering and offshore technology, and was promoted to Technology Fellow in 2012.

Isabel’s technical work focuses on the development of analytical flaw assessment techniques, and their application to safety-critical structures and pressure equipment. Chairing the committee that develops and maintains BS7910 (UK flaw assessment procedure), Isabel is a member of the R6 (UK nuclear assessment procedure) panel. She is also co-author of the European FITNET fitness-for-service procedure.

In 2016 Isabel took up the additional role of Royal Academy of Engineering Visiting Professor in Integrity Management at the University of Bristol.



John Wintle

John Wintle is a Mechanical Engineer, Consultant and leading authority on structural integrity and asset management of installations, welded structures and plant components. He has published many papers and best practice reports for the HSE and the Energy Institute on topics including risk-based inspection, management of ageing plant and asset life extension.

John has acquired significant international experience through his work on European projects, codes and standards committees and through other networks. He was appointed Fellow of the Institution of Mechanical Engineers in 2006, chairing its Pressure Systems Group from 2008 to 2012, and was awarded the Donald Julius Groen Prize for his contribution in 2019. He became a Fellow of The Welding Insitute in 2012 and is Visiting Professor at the University of Strathclyde.



Steve Maddox

Steve Maddox is an expert in the fatigue performance of welded components and structures. He received his PhD at London University, becoming a Chartered Engineer in 1981, a Fellow of the Welding Institute in 1988, a European Engineer in 1990, and Technology Fellow at TWI in 2008. From 1988 to 2007 Steve chaired IIW Commission XIII and was a Visiting Professor at Strathclyde University 2007 to 2012.

Awards for his contributions in fatigue research and the development of design standards include the Lidstone ESAB Gold Medal, the Lillicrap Medal, the IIW Paton Prize and Arata Award, the IMechE James Clayton Prize and The Welding Institute’s Brooker Medal. Steve has over 120 publications, including his book Fatigue strength of welded structures.

Bernadette Craster

Bernadette Craster

Bernadette Craster has worked as a research scientist on non-metallic materials for use in oil and gas applications since 1989. She joined TWI in 2012 and her specialism continues to be ageing of non-metallic materials through permeation processes from complex mixtures. She has contributed to journal publications and patents and now to the API 15 standard for liners and spoolable composites. Bernadette holds degrees from Trinity College, Dublin, the University of Bristol and completed her PhD while employed at Schlumberger Cambridge Research with Professor Chris Breen (Sheffield Hallam) as academic supervisor. 



Peter Mudge

Peter Mudge has been involved in research and development for non-destructive testing (NDT) at TWI since 1976. He is currently Technical Director at TWI group company Plant Integrity Ltd, and Professor Associate in the School of Engineering and Design at Brunel University.

A Chartered Engineer, Peter is a Fellow and past President of the British Institute of NDT, a Fellow of IoM3 and also of The Welding Institute. He sits on the main BSI Standards committee for NDT and is involved with ASME and NACE committees for guided wave testing of pipelines. Peter was awarded the Leslie Lidstone ESAB Gold Medal by the Welding Institute in 1989 for services to welding technology.



Richard Pargeter

Richard Pargeter has been working in the Materials Department at TWI since 1976. He was accepted as a Member of the Institution of Metallurgists in 1980 and given Chartered Engineer status shortly afterwards. Richard is also a Fellow of the Welding Institute, a European Welding Engineer, and a Registered Welding Materials Engineer Group 1.

Richard’s awards include the American Welding Society’s James F Lincoln Gold Medal, the American Welding Society A F Davis Silver Medal, and the Sir William J Larke Medal. He serves on several BSI Committees, and on IIW Sub Commissions on the Metallurgy of Weld Metal, and Metallurgical Studies of Fused Metal.



Mike Gittos

Mike Gittos joined the metallurgy laboratory at TWI in 1974 after gaining both first and masters degrees at Manchester University. Mike has managed many of TWI’s higher profile failure investigations including those assessing significant damage to high value assets.

A European Engineer, Mike is also a Senior Member of The Welding Institute and a Chartered Engineer. In 1993 he was awarded the A F Davis silver medal by the American Welding Society; in 1998 he received the Bengough Award from the Institute of Materials, and in 2010 he received the Commendation Award from TWI.



Mike Troughton

Mike Troughton joined TWI in 1993 after gaining a PhD in Polymer Physics and working in the plastics industry for seven years. He is a Chartered Engineer and a Fellow of The Welding Institute.

Mike is chairman of the BSI committee for plastics welding, the European Welding Federation working group on plastics welders and the Welding Institute Technical Group on polymers. He is also the UK delegate on various CEN, ISO, AWS and ASME standards committees, and is the author of the Handbook of Plastics Joining – A Practical Guide.



Alan Taylor

Following a PhD in physics at Warwick University and post-doctoral work in chemistry at Brunel University, Alan joined the ceramics section of TWI in 1995.

His work is focused on advanced coatings based on inorganic-organic hybrids and nanomaterials. He has eight patents and over 30 published articles. Alan sits on the editorial board of the "Journal of Coating Science and Technology" and on the BSI Nanotechnology Standards Committee NTI/1. He is an expert consultant in the field of highly repellent surfaces for the NANOfutures and Value4Nano European initiatives.



David Howse

David Howse has more than 30 years’ experience in welding engineering, having worked on major projects relating to oil and gas, construction and infrastructure. He graduated in metallurgy from Leeds, later completing an EngD entitled ‘Improved productivity in fusion welding’ at Warwick, and has authored and contributed to more than 20 publications.

David joined TWI in 1994 as a senior project leader in the arcs section. He later spent time as section manager in lasers before, more recently, assuming a senior technical role in the Arc Processes, Fabrication and Welding Engineering section. David has provided technical support to many of TWI’s member companies and overseen a large number of research projects into various aspects of joining technology.



Ian Cooper

Ian is a Chartered Engineer with over 30 years’ experience in NDT. He joinied TWI in 2005 as a principal project leader at the specialist NDT centre in Port Talbot, specialising in NDT of composites. More recently his work has concentrated on advanced NDT methods and automated robotic inspection systems; he was promoted to Technology Fellow in 2015. A recognised expert in the inspection of composites and other difficult materials, he leads the highly successful IntACOM programme developing rapid automated inspection systems for complex geometries.

Ian is an Honorary Professor of Practice at the University of Wales, Trinity St David and is widely published in NDT and aerospace journals. He is vice chair of the BINDT technical committee and is active and influential on a number of other committees that guide the development, application, training and certification of NDT.



Charles Schneider

Charles Schneider has specialised in the reliability and theoretical modelling of NDT techniques since 1985, including 11 years with UK nuclear generating companies, and has played a leading role in the independent qualification of various ultrasonic inspections. He also undertakes statistical and probabilistic analysis, more generally, across various engineering disciplines at TWI, including the analysis of fatigue test data.

His more recent work includes the use of statistical methods to extrapolate corrosion mapping data both in time and to uninspected regions of large plant items. Charles has been closely involved with developing NDT guidance for BS 7910. An area of current interest is the extension of such guidance to the probabilistic assessment of structural integrity.

Colin Ribton

Colin Ribton

Colin Ribton is a Chartered Engineer, Chartered Physicist and a Fellow of the Institute of Physics. He graduated from The University of Nottingham with a joint honours degree in Pure and Applied Physics, before going on to gain a PhD from Brunel University on the subject of ‘Development of an Electron Beam Gun Design Optimisation Methodology’.

Having worked in Electron Beam with TWI since 1985, his work has seen him involved in the computer modelling of electron optics and high voltage components, the design of high voltage power supplies, the design and optimisation of radiation shielding, real-time control system architecture, magnetic systems, the design of digital and analogue electronics, and  the development of processes to manufacture major components in power generation, nuclear, aerospace and medical applications. Colin is on the organising committee of the Electron Beam Technologies biannual conference, is published widely on electron beam gun design and is the inventor or co-inventor on several granted patents, including the RF excited plasma gun and the array probe device for measuring electron beam intensity.

He has also project led TWI’s activities within European and UK government funded collaborative projects looking at higher productivity additive manufacture (3D printing) using electron beams for the aerospace industry.

Dave Harvey

Dave Harvey

Dave Harvey has worked at TWI since 1986, where he has played a leading role in establishing our expertise in thermally sprayed aluminium (TSA) as a means to mitigate the corrosion of welded carbon-steel and stainless steel structures in marine environments. He has also been instrumental in TWI’s work in the field of cold spray, supporting national and international research projects as well as delivering training courses in this area.

Working across departments, Dave has also helped establish new testing facilities and represented TWI at many conferences, seminars and workshops across a range of industry sectors. He became a Technology Fellow in 2018.

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