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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:



In this informative conversation between Vanessa Snyder and Grace Bandong they discuss contaminant testing in hemp and CBD products and why it is important. Grace tells companies the importance of testing for contaminants and gives advice for when and what to test.


Eurofins presents a validation of USP <467> residual solvent methodology for testing on CBD and hemp-based products at the North American Chemical Residue Workshop.


Eurofins presents at AOAC Annual Meeting and Exposition in 2020 summarizing the modifications made to the AOAC Official Method 2018.11 for quantification of cannabinoids to include conversion of Δ9-THCA into Δ9-THC.


Eurofins develops and validates a versatile HPLC-UV/DAD method for analyzing twelve major cannabinoids in dried plant materials, concentrates and oils. Method was granted AOAC First Action OMA status (AOAC Official Method 2018.11).


In this presentation, USP and Eurofins Microbiology provided an overview of USP microbiology methods tests for microbial contamination in dietary supplements, CBD/hemp products, and probiotics. The session included an in-depth discussion regarding the importance of suitability testing, and a comparison of USP methodology to AOAC/FDA BAM methodology. USP also provided an update on new USP chapters and shared insight on what is on the horizon for USP methods.


This presentation is focused on potential hemp regulations and their related dietary supplement regulations.   Some topics during this discussion include section 321(ff)(3)(B) of the FD&C Act and its impact on hemp ingredients, new dietary ingredient requirements and preparation to meet federal regulations for dietary supplements, including dietary supplement Good Manufacturing Practices, should FDA or Congress recognize hemp extracts as lawful dietary ingredients.


Your CBD and hemp-derived multiple-use cosmetic and personal care products that contain preservatives need to be tested to assure the preservation, or antimicrobial action is adequate to fight the introduction of microorganisms.


Read this article to learn more about hemp contaminant testing and how you can be prepared to correctly test your hemp-derived products.


In this article, we will make the case for a testing program for your hemp business that you can implement today that will help prepare you for the regulations to come.


Choosing a reputable hemp testing lab can be difficult and time-consuming. We have put together a checklist of information your hemp company should consider when vetting and selecting a hemp testing partner.


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