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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:



Navigate pesticide MRLs with confidence. This guide explains pesticide maximum residue limits, key Maximum Residue Limits regulations, and how pesticide residue testing supports global compliance. Learn what food export MRL requirements mean for suppliers, brands, and QA teams to protect products and ensure market access.


Selecting the right microbiological testing method isn’t just about speed or cost. It’s about risk management, product integrity, and regulatory compliance. Click to read about the strengths and limitations of different methodologies essential to avoid false negatives, regulatory citations, or costly recalls.


Ensure pet food label accuracy with pet food safety testing, GMO screening, and ingredient authentication. Learn how to verify pet food label claims and meet global regulations.
Keywords: Blog Pet


In the world of dietary supplements and food testing, unexpected results like failed specifications, out-of-spec (OOS) results, or surprising contaminant detections can be unsettling, but they’re not uncommon. Here’s how to navigate the process when results don’t align with expectations.


When it comes to refrigerated and frozen foods, shelf-life testing isn’t just about timelines, it’s about protecting your brand, your label claims, and your consumer’s experience. In this Ask the Expert feature, Sam Wiesenfeld shares insights into the most common questions clients face when designing shelf-life testing protocols for refrigerated and frozen foods.


Learn how mycotoxins like aflatoxin and ochratoxin impact food safety, and why effective mycotoxin testing and monitoring are essential for reducing contamination risks.


When it comes to dietary supplement testing, one seemingly small detail can have outsized consequences: specifying the correct vitamin form. Understanding and communicating the exact vitamin form in your product is not just a technical necessity, it’s a strategic imperative in ensuring accurate results, timely reporting, and regulatory compliance.


Switching oil sources, or developing a new product with an alternative oil, requires more than a label change. It demands a holistic view of how the oil behaves in your product, how it interacts with other ingredients, and how it holds up over time. Click to learn about the key considerations.


In the world of dietary supplements, ingredient authenticity is directly linked to quality, compliance, safety, and consumer trust. With the complexity of botanical materials and the limitations of individual testing techniques, relying on a single method for identity verification can be risky. That’s where orthogonal methods come in. Read to learn more.


Discover how GLP-1 medications are reshaping consumer behavior and driving innovation in food, beverage, and supplement industries , ushering in the “smaller-appetite era” of nutrition and wellness.


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