John Arthur (Jay) Mullis II serves as the Manager of the U.S. Department of Energy’s Oak Ridge Office of Environmental Management (OREM). He has served in this position since November 2017. Mullis is responsible for safely executing the environmental cleanup of the 30,000-acre Oak Ridge Reservation, which entails successfully managing the cleanup of the East Tennessee Technology Park, the Oak Ridge National Laboratory, and the Y-12 National Security Complex. He oversees environmental cleanup and stewardship, decontamination and decommissioning activities, waste processing and management, surveillance and maintenance programs, historic preservation efforts, and procurement and contract functions.

He also recently served as the Acting Associate Principal Deputy Assistant Secretary for Regulatory and Policy Affairs (APDAS) in the Office of Environmental Management (EM) from November 2021 through January 2023. The office provides technical and policy support in the planning and field execution of EM waste and materials disposition, soil and groundwater remediation, and deactivation and decommissioning of EM facilities. He also provided leadership on matters related to regulatory affairs defined by law or negotiated or stipulated compliance agreements. 

Before serving as the OREM Manager, he also served as the Acting Manager and Deputy Manager beginning in February 2015. In this capacity, he helped direct and support the office's division directors and federal project directors to ensure federal oversight and progress conducting environmental cleanup across the Oak Ridge Reservation.

Prior to his selection as Deputy Manager, he was the Acting Deputy Manager and Director of the Engineering, Safety and Quality Division for OREM.

He also worked about nine years in the Naval Nuclear Propulsion program at Charleston Naval Shipyard with the balance of his service working for DOE in various assignments related to environmental restoration, decontamination and decommissioning, and waste management activities. He has led or been a member of numerous audits and assessments, including Conduct of Operations and Conduct of Maintenance assessments.

Mullis holds a bachelor’s degree in electrical engineering from The Citadel, the Military College of South Carolina, and he is a licensed Professional Engineer in the state of South Carolina. He completed extensive training and was qualified as a nuclear engineer while working for the Navy at the Charleston Naval Shipyard and has been a fully certified Facility Representative for the DOE.