Mr. Kumpfmueller is a Senior Associate & Senior Tunnel Engineer with Dr. Sauer & Partners who he is working for since 15 years. He has gained practical experience through his involvement on international tunnelling and mining projects. Mr. Kumpfmueller started with the Dr. Sauer & Partners’ design office in Washington D.C., USA, before relocating to the UK in 2011. He has since worked on Crossrail, London Underground, Highspeed 2 and Network Rail projects. Mr. Kumpfmueller is currently working as the Principal Tunnel Engineer providing project management, technical support, design and consulting to the Woodsmith mine project in North Yorkshire.