This guide explains some of the requirements for the Doctor of Philosophy (PhD) Degree in Mechanical Engineering and Aerospace Engineering. The information provided here supplements the NMSU Graduate School requirements for Doctoral Degrees, which are the minimum requirements. The department's research in the broad area of Solid Mechanics focuses on material science engineering needs. A combination of theoretical, computational and experimental approaches establish connections with processing, microstructure, and microscopic properties. Current funded projects include investigations into nanocomposites and materials for fuel cells.