Luke Swain - Principal Route Engineer (Geotechnics), West Coast Mainline Route, Network Rail. Over the past 13 years, I have been responsible for managing Geotechnical assets on the busy West Coast and Chiltern Mainline railways and have overseen the delivery of a large and complex portfolio of Geotechnical projects. This is a role that constantly offers the chance to meet new people and develop new skills. As a Geologist by background, I love to build and interrogate ground models to understand ground risk.