Jack Wittman has been working as a groundwater scientist and hydrologist since the early 1980s. After several years in state and tribal government regulating mining and nuclear waste isolation, he conducted research applying new modeling techniques to well field design. In so doing, he is one of the co-inventors of a patented method for simulating radial collector wells. Prior to joining INTERA, Wittman was the national director of geosciences for Layne Christensen where he led a team of scientists and engineers that specialized in well field design and impact analysis.