Welcome to CDM Smith.

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.

Why are you a part of CDM Smith? CDM Smith lives and breathes our core value of technical excellence, and our matrix organization allows us to put the best and brightest people on every project no matter where they “reside” across the world. We have deep technical knowledge across the firm, and we focus on knowledge sharing and mentoring to ensure that we are bringing up the next generation of technical experts.

What’s a project or accomplishment that you’re particularly proud of, and why? We are nearly finished building a pilot plant for a PFAS-destruction treatment train using foam fractionation to concentrate PFAS from dilute water streams, electrochemical oxidation to destroy PFAS and a perchlorate polish to provide a complete solution for water treatment. Our approach has the potential to leverage synergistic technologies to provide a more sustainable solution for PFAS treatment.