Vice Chair, ORNL Corporate Fellow Council (2025–current)

Senior Advisor (2024–current), ORNL

Corporate Fellow (2021 – current), ORNL

Serve as a corporate fellow council member and lead research in the area of experimental condensed matter physics to understand and discover emergent quantum phenomena in oxide thin films and heterostructures.

Program Director, ORNL Materials Sciences and Engineering Program (2017–2024) 

Led 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.

Division Director, Materials Science and Technology Division (Interim, 2019) 

Led ORNL’s largest R&D division with over 250 staff with 15 research groups

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 –)

Conduct research on the physics of complex oxide thin films and heterostructures, and precision epitaxial 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)

Physics and materials science of ferroelectric thin films and devices for nonvolitile ferroelectric random access memories 

Advisor: Sung Ho Choh