Dr. Tamzen Macbeth is an internationally recognized remediation expert specializing in the development, demonstration and implementation of innovative, cost-effective technologies for contaminated soil, sediment and groundwater. She has worked on over 100 government, private and international contaminated sites at the laboratory-scale, pilot-scale and full-scale levels. With experience bridging scientific and engineering R&D with the design and optimization of cost-effective cleanup programs, Tamzen has helped advance countless technologies within her field. In addition to her work at CDM Smith, Tamzen has published more than 100 technical papers, training manuals and guidance documents on remediation topics, as well as presented at seminars and international conferences to advance remediation technologies. She was also recognized with CDM Smith's President's Award for Innovation in 2016.