Julia Rosolovsky Greer is a materials scientist and is the Ruben F. and Donna Mettler Professor of Materials Science, Mechanics and Medical Engineering at the California Institute of Technology (Caltech).

[7] Greer attended the Massachusetts Institute of Technology (MIT) for college, where she received a Bachelors of Science in Chemical Engineering and a minor in Advanced Music Performance in 1997.

[10] For her dissertation, titled "Size dependence of strength of gold at the micron scale in the absence of strain gradients,"[11] Greer worked with materials scientist William D. Nix studying the mechanical properties of nanopillars.

[10] After her PhD, Greer pursued postdoctoral studies at the Palo Alto Research Center (PARC) from 2005-2007.

[10] Her lab is now harnessing strategies in nanofabrication for applications ranging from improving lithium-ion batteries to developing biomedical devices.