Derek Tyner is the Lead MEP (Mechanical, Electrical and Public Health) Engineer for the Crossrail Chief Engineers Group. He is responsible for programme wide Technical Assurance activities covering all Stations, Shafts and Portals and Linewide MEP Systems. He manages a team of highly experienced MEP Engineers who perform the assurance reviews of all Contractors MEP design and installation works. Derek has worked for 30 years in the Engineering and Construction industry, the last 20 years exclusively on major rail infrastructure projects. Derek has worked on Crossrail, in the Chief Engineers Group, since 2009.