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Douglas L. Marshall

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Douglas L. Marshall, PhD, CFS

Douglas L. Marshall, PhD, CFS

Chief Scientific Officer

Dr. Marshall is Chief Scientific Officer with Eurofins Microbiology Laboratories, Inc., a division of the global life sciences company Eurofins Scientific.  He is co-founder and Director of the Food Safety Institute, LLC, an integrated consulting and analytical services company affiliated with the Eurofins network of companies.  He is Technical Director for the Refrigerated Foods Association and Microbiology Task Force Chair for the American Spice Trade Association.  His former positions include the following:

  • Associate Dean and Professor of Public Health, College of Natural and Health Sciences, University of Northern Colorado
  • Adjunct Professor with the Colorado School of Public Health and Colorado State University
  • Professor of Food Science, Nutrition, and Health Promotion at Mississippi State University
  • Assistant Professor of Food Science at Louisiana State University
  • Contributing Editor for the peer-reviewed scientific journal Food Microbiology
  • Four consecutive terms on the editorial board of the Journal of Food Protection

He is a frequent volunteer and consultant to trade associations, NIH, WHO, FAO, USDA, and other government agencies and private companies.  His research and expertise has been featured in popular press venues such as Consumer’s Reports, Fine Cooking, USA Today, Fitness, Health, Men’s Health, Chemtech, Nature Science Updates, and ASM Journal Highlights.  He is a frequently invited speaker and a prolific book chapter writer. With over 250 publications, over 300 invited presentations, and over 100 workshops delivered, his scientific research and outreach interests focus on improving the microbiological quality and safety of foods, with emphasis on meat, poultry, seafoods, and produce.  Among these was the completion of the 4 volume Handbook of Food Science, Technology, and Engineering, which he Co-Edited.  He has been the recipient of a number of awards for his scholarly efforts including the Mississippi Chemical Corporation Award of Excellence for Outstanding Work, the International Association for Food Protection Educator and Harold Barnum Industry Awards.  He is a Fellow and former member of the Board of Directors of the Institute of Food Technologists, inaugural Chair of the International Food Science Certification Commission, and former member of the Board of Directors of the American Spice Trade Association. 

On a personal note, early in his career he served as a deck hand on an Alaskan fishing vessel (well before Deadliest Catch) and prefers to spend his free time lost on a trail in the Colorado Rocky Mountains.

Below are resources from Douglas:



Developing a product requires careful consideration of storage, transport, and retail conditions. Spoilage organism testing helps determine the risk of bacterial spoilage under different conditions. Additionally, spoilage testing can be added to routine microbiology testing to ensure continued product quality and safety.


Indicator organisms are groups of microbes that are correlated with other groups. In other words, the presence of one indicates the presence of another. So, indicator testing detects a small group of pathogens instead of running over 30 tests to look for all potential harmful groups. This reduces testing times and costs.


Which food labeling rule applies to your food product? Learn more about USDA and FDA Food Labeling guidelines, coverage, and differences.


PFAS have valuable uses and extreme chemical stability, but can lead to adverse health outcomes. Learn why PFAS testing in foods is now becoming an essential need for your food and supplement products in the market.


Validated methods are essential to reliable botanical testing. Method validation and development ensures analytical approaches are applicable to specific ingredients and provide accurate results. The process of method development and validation are outlined.


Botanical reference materials play a critical role in herbal product testing. Learn about the importance of botanical reference materials, and how choosing a lab with a large reference material library impacts analytical outputs.


In 2016, the FDA updated the Daily Value (DV) and Reference Daily Intake (RDI) for several nutrients, including Vitamin E. The RDIs are published by the National Academy of Medicine (NAM) and based on the Recommended Dietary Allowances (RDA) of α-Tocopherol, as it is the only form of Vitamin E maintained in the blood and has biological activity. Thus, Vitamin E per NLEA regulations (or mg label claim) is defined as milligrams α-Tocopherol. Review this fact sheet for more information about reporting Vitamin E per the regulations.


Manufacturing microwave food or Ready-to-Heat (RTH) products have compelling benefits and challenges. Learn more about the chemistry of how microwave technology works, applications in the food industry, and how testing is an important piece when manufacturing or selling these products.


What is food chemistry and how it is important in the food industry? Learn more about the basics of this food science discipline and the main components that are studied and testing for food ingredient an product quality and safety.


High-Pressure Processing is a food processing technology that enables food safety while maintaining food quality. Learn how this high-pressure technology contributes to food science and testing to help support HPP processing and HPP food safety.


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