About Us DBA Statement of Qualifications DBA Overview Officers Timothy C. Siegel, P.E., D.GE Senior Principal Engineer / CEO Paul J. Axtell, P.E., D.GE Senior Principal Engineer / COO W. Robert Thompson, III, P.E., D.GE Senior Principal Engineer / CFO Principals Dan A. Brown, Ph.D., P.E., D.GE – Chief Engineer and Senior Principal Steven D. Dapp, Ph.D., P.E., D.GE – Principal J. Erik Loehr, Ph.D., P.E. – Senior Principal Barry J. Meyer, P.E. – Senior Principal John P. Turner, Ph.D., P.E., P.G., D.GE – Senior Principal Other Engineers Andrew Boeckmann, Ph.D., P.E. Cody Coonradt, E.I. Dan Ding, Ph.D., P.E. Nathan E. Glinski, E.I. David S. Graham, P.E. Aaron B. Hudson, P.E. Alexia R. Leib, P.E. Mark Madgett, P.E. Robert M. Saunders, P.E. Will Shaffer, E.I. Sam Sternberg, P.E., D. GE. Benjamin J. Turner, Ph.D., P.E.