Sandia Energy > Programs > Renewable Energy > Photovoltaics > Staff Bios > Ashley Maes, Ph.D. Ashley Maes Postdoctoral Appointee, Chemical Engineering Ashley Maes is a postdoctoral appointee working with the Photovoltaics (PV) and Materials Technology Department at Sandia National Laboratories. Her interests include module materials characterization and reliability. Currently, she is working on several projects in the DuraMAT consortium related to encapsulant and backsheet materials. Dr. Maes has a PhD in Chemical Engineering from Colorado School of Mines, where her research focused on water and ion transport in polymer membranes for fuel cell applications.