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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:



What is spectroscopy? What is the difference between NIR vs. Mid IR? What are the benefits of NIR vs traditional wet chemistry? The team at Eurofins QTA answers these questions and more in this edition of our Ask An Expert blog about infrared spectroscopy.


Alicyclobacillus is a non-pathogenic spoilage bacteria that silently sours fruit juice products. With the ability to survive commercial pasteurization, Alicyclobacillus causes unpleasant odors in food products that make the products undesirable to consumers. Is your product at risk?


Foreign materials in products can be dangerous to consumers and damage a brand's reputation. At Eurofins, our team of experts is equipped to identify the cause of contamination and help come up with the ideal solution for you. The case study outlines our approach to identifying the source of microbial contamination in bottled juice, and how we work with clients to prevent future issues.


In this webinar attendees will learn about the technical, instrument, and regulatory considerations for chromatographic method feasibility, development, optimization, verification, validation also method transfer considerations. Original airdate October 20, 2022.


Foreign materials and off-odor or off-flavors in a product may result in loss of consumer trust or a damaged brand reputation. In the worst cases, these issues can be dangerous. The first step in eliminating foreign material and off-odor or off-flavor risk is understanding the sources of contamination, including packaging and production issues and chemical and microbial contamination. This blog explains the benefits of foreign material, off-odor, and off-flavor analysis, the sources of contamination, and the tests available for testing.


Food fraud is a widespread and worldwide problem. Watch this video to learn more about which products are most frequently impacted, and how it can impact your business.


We recently hosted a webinar titled "GC-MS Techniques for Troubleshooting Off-Flavor, Off-Odor, and Flavor Scalping in Foods and Beverages Webinar." This Q&A with Dr. Jamie Willems provides a deeper look in to common questions associated with GC-MS, contaminant detection, and out capabilities at Eurofins.


Natural and synthetic food dyes are used in almost all industries. Understanding the potential for dye adulteration is critical to knowing how and why products are affected. Furthermore, testing with a third-party lab can lead to standardized product coloration and reliable ingredient claims. This White Paper introduces the types of food dyes, the benefits of testing, types of tests, and considerations for choosing a third-party lab.


When a product doesn't taste or smell right, it is a good indicator of contamination or packaging and processing issues. GCMS analysis is reliable method for finding the cause of off-odor or flavor and getting your products back to normal! This infographic provides an overview and a case study of how GCMS is used for off-odor and flavor analysis.


This webinar discusses the risks of foreign materials in food, beverages, ingredients, dietary supplements, and ways to mitigate risks in your supply chain and production process. Also, analytical techniques for foreign material, unknown object isolation, and positive identification.   Original airdate August 17, 2022.


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