Jeremy Marsh was born in the Bronx, New York, and raised in Westchester County. He attended the Horace Mann School before enrolling at Boston College, where he graduated with honors in Biology and a minor in Mathematics. He later pursued his medical education at the Albert Einstein College of Medicine in the Bronx.

Jeremy began his research in brain cancer as an undergraduate at Boston College and continued his work in the field during his time at Einstein. He has presented his research at numerous scientific conferences, published in high-impact journals, and contributed to the book Cancer as a Metabolic Disease.