Mark Johns, Ph.D., P.G., L.H.G.
About Mark Johns, Ph.D., P.G., L.H.G.
Mark Johns, Ph.D., P.G., L.H.G., is an Environmental Scientist and Principal Scientist/Office Director at Exponent, Inc., with over 21 years of experience. He specializes in environmental mediation, expert testimony, and innovative cost analysis for environmental remediation projects.
Work at Exponent
Mark Johns, Ph.D., P.G., L.H.G. has been employed at Exponent, Inc. since 2003, serving as an Environmental Scientist Principal Scientist and Office Director. In this role, he oversees various environmental projects and provides expert guidance on complex environmental issues. His responsibilities include directing large environmental studies and ensuring compliance with regulations such as CERCLA, TSCA, and RCRA. His tenure at Exponent spans over 21 years, during which he has contributed significantly to the field of environmental science.
Education and Expertise
Mark Johns holds a Bachelor of Science degree in Oceanography and Geology from the University of Washington, where he studied from 1973 to 1977. He furthered his education at Texas A&M University, earning a Ph.D. in Oceanography, Geology, and Marine Geotechnique from 1979 to 1984. His academic background provides a strong foundation for his expertise in environmental science, particularly in areas related to environmental remediation and site cleanups.
Background
Mark Johns has extensive experience in the field of environmental science, particularly in site remedial activities and cleanups across various regions, including the U.S., South America, Australia, and Europe. His work involves mediating environmental cases with values up to $150 million and serving as an expert witness on matters related to environmental transport and fate. He has been a charter member of the AAPG Division of Environmental Geosciences since 1993, reflecting his commitment to the advancement of environmental geosciences.
Achievements
Throughout his career, Mark Johns has developed innovative cost analysis tools that utilize Monte Carlo uncertainty simulations. These tools are designed to evaluate probabilities and sensitivities in environmental remediation projects. His contributions to the field include providing expert testimony on the appropriateness of remedial cleanup costs in various environmental media, showcasing his role as a key figure in environmental science and remediation.