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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:



Eurofins Scientific was founded in 1987 with four employees to market a ground-breaking testing technology using Nuclear Magnetic Resonance to detect whether sugar had been added during the winemaking process to increase alcohol content. In the following years, the patented SNIF-NMR® technology was used to verify the origin and purity of several types of food and beverages and identify sophisticated fraud not detectable by other methods.


Bacillus consists of a wide range of species from pathogenic types to beneficial bacteria. Bacillus coagulans, specifically, is commonly used in various products due to its survivability of many processing conditions as well as long shelf life needs. So, how would you test for the pathogen, Bacillus cereus, in a product containing Bacillus coagulans? Our Principle Scientist, Megan Brown, discussed more on this topic and what to keep in mind.


When working with a third party testing laboratory, what should you do to get your sample ready? Daiona Newberry from our Eurofins Microbiology lab in Louisville, KY explains some items to keep in mind in this short video. Eurofins publishes our Ask an Expert Series weekly on our social media platforms.


What should you do when you get a positive result on a presumptive pathogen test? Anne Chi from our Southern California Eurofins Microbiology lab explains some next steps in this short video. Eurofins publishes our Ask an Expert Series weekly on our social media platforms.


Did you know the type of swab or sponge in your environmental monitoring program (EMP) is important in regards to the methods used for detection of pathogens? Camila Gadotti discusses this topic in this short video. Eurofins publishes our Ask an Expert Series weekly on our social media platforms.


There are many different types of PCR-based pathogen detection platforms in the industry. At Eurofins, we are often asked, how does our Eurofins BACGene compare to the most common alternative, Hygiena BAX? Michael Kaiser from our Eurofins Microbiology lab in Madison, WI discusses this topic in the short video. Eurofins publishes our Ask an Expert Series weekly on our social media platforms.


Formulating a new product can be exciting! But sometimes we are not sure of the effect this can have on growth of spoilage organisms during shelf life or risk of pathogenic bacteria. Martha Kimber from our Advance Microbiology Lab in Fresno, CA discusses this topic in this short video. Eurofins publishes our Ask an Expert Series weekly on our social media platforms.


Should you use a microbiological enumeration method that reports coliforms in colony forming units (CFU) per gram or most probable number (MPN) per gram? Which method is better? Abraham Gonzalez from our Southern California Eurofins Microbiology lab discusses this topic in this short video. Eurofins publishes our Ask an Expert Series weekly on our social media platforms.


Are ATP swabs adequate enough for monitoring environmental contamination in your facility? Our Chief Scientific Officer, Dr. Doug Marshall explains industry best practices and what might be the best approach. Eurofins publishes our Ask an Expert Series weekly on our social media platforms.


Should you be testing for Listeria species or Listeria monocytogenes? It is difficult question but one that Karissa Roadhouse from our Eurofins Microbiology lab in Louisville, KY helps us understand better in this short video. Eurofins publishes our Ask an Expert Series weekly on our social media platforms.


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