Mark Harris, Ph.D., M.B.A.
Managing Principal Scientist


Phone(281) 394-1567
Fax(832) 218-2756
LocationHouston, TX
Address23501 Cinco Ranch Blvd
Suite B226
Katy, TX 77494




Professional Profile

Dr. Mark Harris is a cofounder of ToxStrategies and has more than 25 years of experience in the areas of toxicology, human health risk assessment, and risk-based site investigations. He routinely applies his skills as a toxicologist and human health risk assessor to many types of projects, including designing, placing, and overseeing toxicology laboratory studies; and developing state-of-the-science toxicity values via the application of both default and more rigorous approaches such as benchmark modeling, application of weight-of-evidence techniques, and consideration of mode-of-action information. Other project experience includes estimating human exposures using a variety of approaches, including designing, implementing, and using data from biomonitoring studies; using complex data sets such as NHANES and conducting studies to gather human exposure information; modeling uptake and exposure via a variety of exposure pathways; and conducting both screening- level and complex site-specific risk assessments to quantify human health risks, including conduct of probabilistic risk assessments. Dr. Harris has a strong understanding of a wide variety of regulatory guidance documents that focus on human health risk assessment. He has substantial experience in dealing with regulatory agencies, ranging from implementation of administrative orders to developing site cleanup standards. Additionally, Dr. Harris has extensive experience in developing risk-based site investigations for both industrial and residential sites and in conducting source identification studies using both chemical fingerprinting techniques and historical records searches.

Dr. Harris is a co-author of more than 65 scientific journal articles and has participated in numerous technical seminars. He is a peer reviewer for several scientific journals, including the Journal of Soil and Sediment Contamination, Integrated Environmental Assessment and Management (IEAM), the Journal of Air and Waste Management, and Environmental Science and Technology (ES&T).