Dr. Clint Geller joined Materials Design, Inc. in June of 2020. He is a recently retired Senior Advisor Scientist (previously called “Advisory Scientist”) with the Naval Nuclear Laboratory (Bettis site, near Pittsburgh), where he was employed for over 40 years. Clint received a PhD in physics in 1979 from the University of Illinois at Urbana, and a BS in physics in 1975 from the Cooper Union for the Advancement of Science and Art, in NY, NY. His PhD thesis was entitled “Correlated Hartree-Fock Band Structures for Transition Metals.”

Dr. Geller’s work experience has included research in:

• Zirconium alloy corrosion, hydriding, and thermal conductivity, including the optoelectronic properties of zirconia phases

• High temperature refractory metal creep properties

• Hydrogen retention in high-temperature solid moderator materials (YHx and Y-rare earth-Hx alloys)

• Thermionic, thermoelectric, and thermophotovoltaic energy conversion

• Optoelectronic properties of thermoelectric materials, III-V semiconductors, and large bandgap insulators

• Piezoelectric materials

• Rad-hard nuclear reactor sensors for the NASA Prometheus Project

• Fatigue, corrosion fatigue crack growth, and stress corrosion cracking in austenitic stainless steels and nickel based superalloys

Dr. Geller received four Westinghouse Corporate and/or Bettis Laboratory awards, and two United States patents for engineering and scientific achievements. While external publications were never a focus of his job, he has approximately forty external publications in technical fields ranging from the optoelectronic properties of solids, to thermophotovoltaic energy conversion devices, to fatigue and fracture of steels, to crystal plasticity and dislocation dynamics. He also taught the Applied Nuclear Physics Course thirteen times in the Bettis Reactor Engineering School, a graduate nuclear engineering program accredited through Penn State University.

To date, about half of Dr. Geller’s career has been spent as a materials modeler and half as a development engineer. Over his entire career, he has served as a highly effective bridge and liaison between the scientific and engineering development communities, combining technical expertise with communication skills. Dr. Geller has been a visionary computational toolmaker as well as a tool user, having stimulated and directed the development of new modeling tools for the scientific and engineering communities, including several aspects of MedeA. He has directed several multi-scale, multi-physics model development projects, including, most recently, the ongoing Environmentally Influenced Crack Evolution Modeling (EICEM) Program at NNL, on which he presented at the 2018 Materials Design, Inc. software user’s meeting in Pittsburgh. He also originated the current Advanced Materials Simulation Engineering Tool (AMSET) project. In all his endeavors, Dr. Geller has striven to maximize the value and utility of scientific research efforts to the sponsoring engineering development organizations. Dr. Geller maintains this same focus as an Materials Design, Inc. employee.