Tim Whittle graduated with a degree in Engineering Science from Cambridge University in 1979 and joined Flopetrol – a well testing company. Having gained field experience and developed pressure derivative analysis methods, he moved into consulting roles performing reservoir engineering and pressure transient analysis studies as well as teaching and developing software. For the last ten years, he worked at BG Group (now Shell) where his last role was Chief Reservoir Engineering Advisor and Group Technical Authority in Well Testing and Pressure Transient Analysis. A SPE Distinguished lecturer (2010-11), he is now an independent consultant and Visiting Professor at Imperial College where his research interest is Multi-well Deconvolution.