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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:



You walk the field, you pick some product, and you drop it off at the lab for testing. Not long after, you hear back your sample is presumptive. Now what?


Are you struggling with positive environmental pathogen tests? This may indicate that your facility is suffering from microbial harborage sites. A harborage site is a growth niche in which bacteria or other microorganisms can reside and grow for months and possibly years.


What species of microorganisms are present in your dairy products? Learn why you need microbiome monitoring for your dairy products.


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.


DNA sequencing is an important tool to identify all Probiotic organisms in a sample all in one assay. In this Scientific Poster, Eurofins scientists investigate a long-read sequencing method that accurately identifies probiotic organisms in complex samples recently presented at SHIFT 20.


In this poster, Eurofins describes how the utility of flow cytometry was expanded further by applying modifications to ISO 19344(B) in order to accurately quantify the yeast in the sample.


This analysis compares BACGene Real-Time PCR and BAX® System PCR Methods for the Detection of Salmonella in Pet Food.


In this case study learn more about how the unique Eurofins ExpressMicro service molded to meet the needs and became the preferred solution, saving both time and money for a leading food producer.


At Eurofins, ExpressMicro samples arrive at the lab in the early morning hours, six to eleven hours earlier than other labs—and we deliver results up to eight hours faster than standard next-day air shipping.


Eurofins Microbiology network has a one-stop-shop approach that allows you to work with one lab, receive one report, and one invoice saving you both time and money.
Keywords: Video Microbiology


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