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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:



Are you struggling with positive environmental pathogen tests? This may indicate that your facility is suffering from microbial harborage sites. A harborage site is a growth niche in which bacteria or other microorganisms can reside and grow for months and possibly years.


Whether you're looking to monitor your workplace environment for coronavirus as a precautionary measure or as part of your sanitation verification due to known exposure to COVID-19, this Eurofins white paper will provide you the foundation and best practices you need to implement a thoughtful viral monitoring program and insights to crucial remediation strategies. Connect with our coronavirus response team today!


Equip yourself with the tools and information you need to implement effective environmental monitoring and control programs for viruses. Watch our webinar on best practices for virus environmental monitoring and remediation!


A large dairy product manufacturer expressed interest in an alternate PCR method for the detection of Genus Listeria in their environmental and product testing program due to recurring false-positive detections and high levels of environmental Genus Listeria positives in the recent past. Our objective was to compare the performance of two PCR based methods for Genus Listeria detection.


The experts at Eurofins have identified some key considerations for environment sample collection that will help ensure quality results. These quick tips will help you build a solid foundation for detecting facility risks as you conduct your environmental monitoring programs.


The success of such programs hinges not only on consistent implementation and testing, but also on the effective swabbing of your plant. Below are the top 5 mistakes our experts see plants make when sampling and submitting swabs and sponges for testing.


Watch this webinar to learn how quality and maintenance can work together, and gain insight to demonstrate ROI to your senior management for new equipment or upgrades within your plant.


In this webinar, Doug Marshall, Chief Science Officer at Eurofins Microbiology discusses an approach to zone 1 testing that recommends non-direct-contact surfaces simultaneously for pathogens and indicators, then building a correlation between quantitative indicator count and Salmonella or Listeria prevalence. Dr. Marshall will share insights on how companies are employing this approach, including exploration of the various philosophical and scientific rationales for zone 1 pathogen testing.


In this webinar, Dr. Douglas Marshall, Ph.D., Chief Scientific Officer of Eurofins Microbiology, outlines his most valuable tips for an effective environmental monitoring program.


Collecting environment samples in an aseptic manner is critical to ensuring the quality of the testing results. Eurofins Microbiology has updated our guide to effective environmental swabbing.


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