Heidi Marie Schellman (born 1957) is an American particle physicist at Oregon State University (OSU), where she heads the Department of Physics.

[3] At the University of Oregon, both her parents "were known for advancing the study of protein structure, folding and stability through techniques such as circular dichroism spectroscopy".

[7] Schellman began her career as a programmer at the Stanford Linear Accelerator (SLAC),[8] where she learned "she liked the mixture of theory and practice in experimental physics.

[8] In 2015, Schellman was elected vice chair of the Commission on Particles and Fields within the International Union of Pure and Applied Physics.

[11] She has collaborated on D-Zero and Tevatron experiments at Fermilab, researching the mass of top quarks and interactions of protons and anti-protons, and has extensively studied quantum chromodynamics perturbation theory.