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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 also 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.  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
  • 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 and over 180 invited presentations, his scientific research and outreach interests focus on improving the microbiological quality and safety of foods.  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, former 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:



Third-party food safety testing is a surefire strategy to save money, boost quality, and increase profit margins. Find out how Eurofins can partner with your company.


For microbiology both quantity and quality matter, and microbiological testing methods are classified as being either quantitative or qualitative. Which category they fall into is based on what type of data is actually collected and reported.
Keywords: Blog Microbiology


Here we are in the third post of a series focusing on pet food, pet treat, and pet supplement testing considerations. We have explored guaranteed analysis and other testing considerations such as shelf life and microbes. This time around I’ll expand on a topic that people often view as less a food safety issue and more of a palatability issue: Rancidity.


If you are seeking your initial GFSI benchmarked certification and aren’t sure if you’re ready, a pre-assessment audit is a great tool to verify your preparedness. You can think of a pre-assessment as a “practice audit” that will provide an expanded review of your facility’s program and procedures as they relate to the audit scheme.


The success of such programs hinges not only on consistent implementation and testing, but also on the effective swabbing of your plant. Below are the top 5 mistakes our experts see plants make when sampling and submitting swabs and sponges for testing.


This series is focused on getting new pet food, pet treat, and pet supplement businesses headed down the right path.


Whether you’re considering selling your homemade pet treats or starting a new pet treat business, one of the first steps you may find yourself tasked with is determining what a guaranteed analysis is. Figuring out how to have a product tested and what information is pertinent can be intimidating – the information in this post is intended to get you started in the right direction.


Welcome to the first edition of the all-new DQCI blog! Stay tuned for additional installments that address pertinent topics for the milk producer and dairy manufacturing industries from our in-house experts.
Keywords: Blog Dairy


Although many genera of bacteria produce lactic acid as a primary or secondary end-product of fermentation, the term Lactic Acid Bacteria (LAB) is conventionally reserved for genera in the order Lactobacillales. LAB have many applications in food production and spoilage, all of which apply when considering when and how to test for lactic acid bacteria in food.


Meet Lorena Dean, a recently promoted business development specialist at Eurofins BioDiagnostics, is a world explorer with a passion for science, biology, and people.


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