Caleb Marshall was born and raised in Greenville, MS, in the heart of the Mississippi Delta. He attended high school at the Mississippi School for Mathematics and Science and graduated in 2016. Afterwards he attended the Mississippi State University, where obtained a Bachelor of Science in Poultry Science with a Pre-Veterinarian concentration in 2021. During his undergraduate studies, he worked in several laboratories assisting with research under the advisement of Dr. Kelley Wamsley (Applied Poultry Nutrition), Dr. Wei Zhai (Basic/Applied Poultry Nutrition), and Dr. Li Zhang (Molecular Biology).

In 2021, he started as a Master student under Dr. Kelley Wamsley and conducted several poultry nutrition research trials and obtained a Certificate of Excellence in Research at the 2023 International Poultry Scientific Forum for his presentation abstract presentation “Sample size, selection criteria, and personnel impact on processing variance in nutrition research.” In the summer of 2023, he successfully defended his Master of Agriculture thesis entitled "Advancing poultry nutrition through statistical strategies to reduce experimental variation and novel protease enzyme research.”

Prior to starting his Ph.D. program (Jan. 2024; Poultry Nutrition and Data Analytics) at North Carolina State University under the advisement of Dr. Edgar Ovideo, Caleb joined the Stein Monogastric Nutrition Lab in July 2023. He joined the lab a visiting scholar for the opportunity to expand his knowledge of monogastric nutrition to include swine. During his time working in the Stein Lab, he hopes to improve his understanding of nutrient utilization and digestibility both of which are critical for effective diet formulation. He believes it is important to have a good understanding of pigs and poultry to one day help meet the common nutritional challenges faced by these species.