Donald Wyman Vasco is a senior scientist at the Lawrence Berkeley National Laboratory, recognized for his contributions to the development and application of asymptotic techniques to the modeling and inversion of fluid flow and geophysical data. Dr Vasco is the recipient of the Society of Petroleum Engineers' Cedric K. Ferguson Certificate for the best peer-reviewed paper of 1999, and has authored or co-authored over 100 peer-reviewed articles on geophysical and hydrological inverse methods and modeling techniques.