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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:



This poster discusses research with the purpose of demonstrating a proof of concept for a reliable methodology evaluating postbiotic materials as characterized by inanimate cells by flow cytometry.


This poster discusses research with the purpose to demonstrate proof of concept of the EPRI tool with real-world samples by comparing against a validated pathogen method and culture.


This poster discusses research with the purpose to evaluate the performance of a commercial real-time PCR Salmonella detection method with spice matrices having antimicrobial and PCR inhibitory properties and to determine if any method modifications are required to obtain acceptable results.


This white paper will provide a brief overview of both prevention and investigation of spoilage. By focusing on principles, it will not be able to answer every question, but rather will illustrate questions to ask during product design and failure investigations.


Mushroom toxicity comes from many sources, including the soil, processing, and the mushrooms themselves. This infographic outlines sources of contamination, as well as steps to take to minimize the risk of toxins entering the food chain.


This webinar presentation covers a background review of how we have come to report results as “presumptive”, the current state of rapid and confirmation testing, and possible future direction. Original airdate December 7, 2023.


In this on-demand webinar, Eurofins Microbiology Laboratories has partnered with Rheonix to explore the challenges centering around recurring Listeria in an environment, and to offer real answers to your nagging Listeria questions and limited industry resources. Original airdate November 14, 2023.


In this on-demand webinar, you will learn how to assess your microbiological food safety hazards related to these holding steps and determine if pathogen growth and/or toxin production may occur. We will discuss several case studies as well as different strategies you may employ to address these identified risks. Original airdate October 11, 2023.


Microbiological specifications are tools used to help manage risk in a food business. A specification defines the limits of acceptable and unacceptable conditions at important decision points in the manufacturing and distribution continuum, from ingredient specifications to final product specifications. In this white paper we will explore the types, uses, and creation of microbiological specifications.


In a recent webinar, experts answered some FAQs about probiotic enumeration, with a focus on the applications of flow cytometry to probiotic products. This blog provides an overview of the questions and answers, including the benefits of flow cytometry, how it compares to plate counts, and considerations for testing.


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