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Researcher Profiles

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Portrait of a woman with dark hair and bangs wearing a green shirt, smiling slightly in front of a blurred abstract tree design.

Nina Gottschling is a Wigner Fellow at ORNL whose research focuses on uncertainty quantification, inverse problems, and photonic quantum computing, with an emphasis on mathematical accuracy bounds for AI and scientific computing. She bridges rigorous mathematics, simulation and experiment to advance computational and quantum technologies.

Researcher Sean Turner poses at Melton Hill Dam on the Clinch River

Sean Turner, a senior engineer at ORNL, uses large-sample deep learning and hydrology models to predict river temperatures nationwide and assess their impacts on interconnected hydropower and nuclear operations, despite limited observational data. His work focuses on integrating river and power grid models to improve energy reliability, inform infrastructure siting and support water–energy decision-making.

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Brian Anderson has led ORNL's Enrichment Science and Engineering Division since 2020, overseeing work in enrichment technologies and stable isotope production. The division supports national needs across security, research, medicine and industry while expanding its technical capabilities and workforce.

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What began as a plan to teach in a classroom eventually brought Shannon Cass to ORNL, where she teaches in a different way — by helping others understand the importance of security. As security operations lead for the Enrichment Science and Engineering Division, she works to protect both people and information while supporting the lab’s mission.

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Emory Collins’ six-decade career at ORNL began in 1965 and spanned major advances in isotope production, nuclear fuel cycle research, and national responses such as the Three Mile Island cleanup. As the lab’s longest-serving full-time employee, he continues to apply his deep technical expertise to modern isotope challenges, mentoring colleagues and contributing to programs that shape the nation’s nuclear science capabilities.

A woman with short curly hair smiles while standing outdoors in front of a pond. She is wearing a light blue floral sleeveless blouse and a necklace. Behind her, there is a small footbridge, green trees, and landscaped plants surrounding the water.

Building on ORNL’s legacy in health physics, Caleigh Samuels uses AI to modernize radiation dosimetry models. Her work provides federal agencies with the accurate data needed to strengthen nuclear safety.

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Philip Dee, a Eugene P. Wigner Distinguished Staff Fellow at ORNL, develops machine learning–augmented simulations to explore quantum many-body systems, bridging theory and experiment at the quantum frontier.

Joshua Vaughan standing by a machine at the MDF

Joshua Vaughan leads ORNL’s Manufacturing Robotics and Controls Group at the Manufacturing Demonstration Facility, where his team develops smarter, more flexible robotic systems to strengthen U.S. manufacturing. 

ORNL researcher Christi Johnson is reaching inside a cabinet

From racing dragsters at 145 miles per hour to leading advanced sensor research, Christi Johnson has built a career defined by precision, persistence and applied physics. Now a technical professional at Oak Ridge National Laboratory, she designs and tests cutting-edge technologies while mentoring the next generation of innovators.

Radiochemist in the lab with coat and equipment

Radiochemist Pavithra Kankanamalage is improving radioisotope separations at ORNL to boost their availability for cancer treatments and other medical uses. Her work also fulfills a childhood promise inspired by her grandfather’s battle with cancer.