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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:



This poster evaluates the microbiological safety of immersion method concentrated coffee, and single strength cold brew coffee processed by UHT. The results were used to determine if temperature controls for safety (TCS) should be required for these products during retail.


This poster discusses research with the purpose to validate enrichment concentration as a method for shortening enrichment times to 12 hours for Listeria testing in leafy greens.


This poster discusses research with the purpose to develop a molecular method that detects indicators of enteric pathogen contamination and requires less than six hours of enrichment.


This poster discusses research with the purpose to determine the main cause(s) of presumptive Listeria spp. environmental samples that fail to confirm by culture.


This poster discusses research with the purpose to evaluate an automated highly multiplexed PCR system for the characterization and molecular confirmation of presumptive environmental sample enrichments in comparison to cultural confirmation.


This Environmental Monitoring Guide focuses on why to have an environmental monitoring program (EMP), where and how to perform environmental monitoring with the Zone concept, evaluation of results and root cause analysis when out-of-spec environmental test results are found, and corrective actions to take based on root cause analysis.


Spices are known to have antimicrobial and PCR inhibitory components. This research validates the performance of the BACGene Salmonella spp. realtime PCR assay for detection of Salmonella in seven spice matrices and an additional nine spices via matrix verification.


This poster discusses research focused on the co-enrichment detection of Salmonella and STEC on produce matrices.


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.


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