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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:



Discover how a leading brand overcame protein precipitation and visual separation issues in their dairy-based RTD coffee. Explore the innovative solutions implemented to stabilize the coffee-dairy matrix and ensure product consistency.


The demand for shelf-stable beverages continues to grow across categories, from juices and ready-to-drink teas to dairy-based and plant-based protein drinks. However, ensuring both safety and product integrity requires a clear understanding of processing methods, particularly as they relate to high-acid vs. low-acid beverages. This white paper outlines best practices for processing high-acid and low-acid beverages, common formulation challenges, and key factors for ensuring a safe, high-quality final product.


Precise instrument calibration is critical for maintaining accurate mass balance in dairy plants. As highlighted in this Eurofins Case Study, inconsistent calibration practices can disrupt the accuracy of milk-to-butterfat ratios, leading to substantial revenue losses during production.


In the product development process, scaling dairy-based systems takes more than a good formula—it takes a deep understanding of how everything works together.


November 2024 - Eurofins DQCI and Eurofins Microbiology Laboratories, Inc. are excited to announce the launch of an innovative new test for Avian Influenza A in raw milk, designed to safeguard dairy herds and ensure the health and safety of milk production. This test offers dairy farmers and processors a crucial tool to detect and manage avian flu outbreaks efficiently.
Keywords: News Dairy


In this on-demand webinar discover the strategies to address chemical contamination in Clean in Place (CIP) processes effectively. Original airdate April 17, 2024.


We are excited to announce the promotion of Dr. Dino Holmquist as the Chief Science Officer for the US Dairy industry. He brings over a decade of experience in dairy analytical testing and a strong commitment to food safety and quality assurance.
Keywords: News Dairy


This white paper will provide a brief overview of both prevention and investigation of spoilage. By focusing on principles, it will not be able to answer every question, but rather will illustrate questions to ask during product design and failure investigations.


Calibration standards are a necessary investment in reducing production risks and improving overall profit. How do you choose the right calibration frequency for your diary production?
Keywords: Video Dairy


One way to improve profitability is to reduce waste by not placing more of the valuable components in your products than is necessary. In the dairy industry, shrink may be seen when producing products with more protein and/or fat than may be required based on industry-determined minimum values.
Keywords: Blog Dairy


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