©  MWHA 2012 Made with Xara AEA Technology Rail, AMEY/Arcadis Vectra, Atkins, ARUP, BAe Systems, BR Research, British Railways Board, c2c Rail, Chiltern Railways, London Underground, Go-Ahead Group, GT Railway Maintenance, Halcrow, HSBC Rail, Interfleet Technology, London Underground, National Rail Supplies, Network Rail, OptiConsulting,Railway Safety & Standards Board, Redifon MEL, Scientifics Limited, Siemens Transportation Systems, Sotera Risk Solutions, Southern Railways, TCI Rail, Thales Land & Joint Systems and the Transport Research Laboratory. - selected clients only. Mark has worked with many large blue-chip clients as well as strategic rail authorities, train operating companies, rail maintenance companies and international consultancies.