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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:



Acai (Euterpe oleracea) is widely used in dietary supplements and functional foods for its antioxidant-rich profile and its role in supporting healthy aging and overall wellness. As demand increases, so does the risk of adulteration. Learn how Eurofins can protect your product integrity and brand claims.


A dietary supplement manufacturer submitted a finished capsule product and associated raw materials for identity verification testing. The materials were labeled and supplied as Astragalus membranaceus root. Learn how our Eurofins team assisted with this request.


Breeding improvements, shifting growing regions, climate variability, fertilizer practices, and processing changes can alter the balance of proteins, oils, moisture, and minor constituents in canola materials. Keep reading to learn how Eurofins can help you tackle these problems when they arise.


In this Case Study, learn how Eurofins QTA helped a client dramatically improve quality control, reduce waste, and optimize kiln performance.


A food entrepreneur developed an innovative line of ambient, shelf stable pouched snack products that required a full retort process to achieve commercial safety and stability. While interest from retailers and distributors grew quickly, the brand faced a major obstacle - their manufacturing facility was still under construction, leaving them unable to produce at the volume needed to scale. Keep reading to learn how Eurofins can help.


A supplement manufacturer added methylcobalamin (Vitamin B12) to a product, expecting to meet label claims. However, testing revealed only ~50% of the claimed amount, triggering an out-of-spec (OOS) result. Read to learn how Eurofins Supplement Testing resolved the unexpected results.


A client submitted a batch of Turmeric Powder (Curcuma longa rhizome) for routine identity and quality verification. The samples were were expected to match the fingerprint of authentic turmeric reference materials. Learn how Eurofins detected detected adulteration in the client's submitted sample.


After months of fine-tuning flavor, texture, and active ingredients, a new nutritional formula was ready for scale-up. This case study explores the successful transition from lab-scale to full-scale production—preserving product integrity across thousands of gallons.


As a widely used culinary and medicinal herb, oregano is expected to meet strict botanical specifications. Read our case study to learn how Eurofins analysts used HPTLC and microscopy to uncover botanical adulteration in an oregano sample submitted for identity verification and quality assessment.


Explore a real-world OOS case study where collaborative investigation revealed formulation challenges as the root cause. Learn how targeted troubleshooting helped a client improve product consistency and manufacturing protocols.


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