Mary deFlaun, Ph.D., BCES

Mary deFlaun is a Senior Principal Environmental Scientist based in New Jersey with more than 20 years of experience focused on the development and implementation of in situ remediation technologies.

Mary has practical experience bringing in situ remediation technologies addressing recalcitrant organics and metals from bench and pilot scale applications to practical field applications. She has applied technologies such as biostimulation and bioaugmentation to impacted soil and groundwater at locations throughout the eastern United States, including six CERCLA-regulated sites. Her work on in situ groundwater remediation technologies and the demonstration of Monitored Natural Attenuation (MNA) has recently led her to focus on the emerging issues associated with subsurface vapor intrusion from groundwater.

To advance the state of the practice, Mary continues her participation in groups such as the Interstate Technology & Regulatory Council's (ITRC) BioDNAPL group, where she is involved in developing the "Bioremediation of Chlorinated Ethene DNAPL" technical guidance document for state environmental regulators. Applying her expertise in the degradation of chlorinated organic compounds and heavy metals remediation, she is collaborating with Princeton University on a U.S. Department of Defense (SERDP) technology demonstration program involving biostimulation for the in situ sequestration of arsenic. Mary has been recognized by the U.S. Department of Energy for her work in the Subsurface Science Program, and for her work with the Natural and Accelerated Bioremediation Research (NABIR) Programs, and by DOE's Office of Science for her leadership of the field research program on bioaugmentation at Oyster, Virginia. She received the Thomas Alva Edison Patent Award from the Research and Development Council of New Jersey for her work on two patents in the degradation of MTBE.

Contact Mary deFlaun at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1-609-895-1400.

Career Summary: Mary deFlaun, Ph.D., BCES

  • Education: Ph.D., Oceanography, University of South Florida, 1987; M.S., Oceanography, University of Maine, 1982; B.S., Biology, Beloit College, 1978
  • Practice Areas: Contaminated Site Assessment and Cleanup
  • Disciplines: Microbiology, Environmental Sciences
  • Specialties: Groundwater Assessment and Remediation; Specialized In Situ Treatment Technology; Vapor Intrusion; Brownfields Redevelopment Planning and Design

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