Program Director, ORNL Materials Sciences and Engineering Program (2017-current) 

Lead one of the largest DOE-BES-MSE portfolios involving approximately 100 scientific staff, postdoctoral researchers, graduate students, and research support staff; responsible for coordinating and leading the science and technology agenda for the DOE-BES to deliver research in the areas of quantum materials, quantum information science, soft matter, and structural materials.

Interim Director, Materials Science and Technology Division (2019)

Led ORNL’s largest R&D division with over 200 staff

Group Leader, Quantum Heterostructures Group (formerly Thin Films and Nanostructures) (2013-2020)

Led a research group  conducting  experimental research on correlated topological quantum materials and oxide heterostructures through precision synthesis and advanced spectroscopy 

R&D Staff (currently Corporate Fellow), Oak Ridge National Laboratory (2002 – current)

Conduct research on the physics of functional oxide thin films and heterostructures, and precision synthesis by pulsed later deposition

Postdoc (1999-2002), Max Planck Institute of Microstructure Physics, Halle/Saale, Germany

Physics of layered ferroelectric thin films and PLD synthesis of epitaxial ferroelectrics

Advisor: Prof. D. Hesse and Prof. U. Goesele

Ph.D. Korea University (1999)

Ferroelectric thin films and device applications for ferroelectric random access memories 

Advisor: Sung Ho Choh