Marshall McCue is a comparative physiologist with expertise in nutritional physiology and bioenergetics in humans and animal models. He has published over 60 peer reviewed papers (over 30 of which involve stable isotopes) and edited the book, Comparative Physiology of Fasting, Starvation, and Food Limitation. During his academic career McCue developed several new experimental approaches to study nutrient flux in vivo using stable isotope tracers to answer fundamental questions about how and when organisms assimilate, allocate, mobilize, and oxidize their energy resources.

McCue is an associate editor for the journals Comparative Biochemistry and Physiology and Physiological and Biochemical Zoology and has been a member of the APS since 2002. In 2018 McCue joined Sable Systems International to develop a multiplexed system capable of real-time stable isotope analyses. He now oversees the research team and tests pre- and post-development products.