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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:



Eurofins presents at AOAC 2020 Virtual Annual Meeting & Exposition. Adulteration to fruit juices has been a long-standing problem in food processing. While analytical tests exist to detect cheaper juices in more expensive ones, an ongoing problem arises when lime juice is blended with lemon juice. Due to their chemical similarities, this requires new in-depth methods.


In this poster, Eurofins describes how the utility of flow cytometry was expanded further by applying modifications to ISO 19344(B) in order to accurately quantify the yeast in the sample.


This analysis compares BACGene Real-Time PCR and BAX® System PCR Methods for the Detection of Salmonella in Pet Food.


To address the industrial needs for rapid and economic analysis of steviol glycoside products we developed and validated a method. This method has the potential to be adapted as an industrial standard for the rapid and economic analysis for testing steviol glycosides.


This poster describes the method development of Retinyl Acetate and Retinyl Palmitate by Supercritical Fluid Extraction and Chromatography.


This poster describes the method development of the AOAC First Action 2018.16 Method: Sugar Profile by High-Performance Anion Exchange Chromatography.


This scientific poster demonstrates the importance of appropriate HPLC columns when analyzing Vitamin C in serums.


This scientific poster discusses the influence of various modes of detection and sample preparation for Vitamin K analysis.


This paper discusses the theory behind supercritical fluids, key method information, and the benefits to testing fat soluble vitamins in supplements as well as mycotoxins in food products by this unique and green chemistry methodology.


This poster—originally presented at IFT’s annual 2019 meeting—seeks to determine the robustness of LAMP pathogen assays by testing wide variations in temperature, incubation time, and other conditions, to facilitate efficient laboratory operation in “real world” conditions.


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