Professor Arthur W. Lees has spent most of his career in the power generation industry. After completing his PhD in physics, he joined the Central Electricity Generating Board, initially developing FE codes then later resolving plant problems. After a sequence of positions he was appointed head of the Turbine Group for Nuclear Electric Plc. He moved to Swansea University in 1995, where his position was jointly funded by British Energy Plc and BNFL until August 2000. He was then appointed to a permanent chair within Swansea University. He is a regular reviewer of many technical journals and is currently on the editorial boards of the Journal of Sound and Vibration and Communications on Numerical Methods in Engineering. His research interests include structural dynamics, rotor dynamics, and heat transfer. Professor Lees is a Fellow of the Institution of Mechanical Engineers and a Fellow of the Institute of Physics.