Vision and Leadership

INL Vision

Our vision is to change the world’s energy future and secure our nation’s critical infrastructure.

INL Vision

Our vision is to change the world’s energy future and secure our nation’s critical infrastructure.

INL Mission

Our mission is to discover, demonstrate and secure innovative nuclear energy solutions, other clean energy options and critical infrastructure.

Senior Leadership Team

Dr. John Wagner

Laboratory Director

Dr. David Teter

Deputy Laboratory Director for Management & Operations, Chief Operating Officer
Todd Combs

Dr. Todd Combs

Deputy Laboratory Director for Science & Technology, Chief Researcher Officer

Dr. Jess C. Gehin

Associate Laboratory Director – Nuclear Science & Technology
Crone

Mr. Ron Crone

Associate Laboratory Director – Materials and Fuels Complex
O'Kelly

Dr. Sean O’Kelly

Associate Laboratory Director – Advanced Test Reactor

Shannon Bragg-Sitton

Dr. Shannon Bragg-Sitton

Associate Laboratory Director — Energy and Environment Science and Technology

Mr. Zachary (Zach) Tudor

Associate Laboratory Director – National & Homeland Security Science & Technology
Iris Anderson

Ms. Iris Anderson

Chief Financial Officer & EXECUTIVE Director – Business Management
Shawn Hill

Mr. Shawn Hill

Executive Director – Facilities & Site Services
Kase Brock

Mr. Kase Brock

Executive Director – Safeguards and Security

Mr. Mark Holtermann

Chief Information Officer & Executive Director – Information Technology
Heidi Dillard

Ms. Heidi Dillard

CHIEF HUMAN RESOURCES OFFICER & EXECUTIVE DIRECTOR – HUMAN RESOURCES

Mr. Eric Papaioannou

Executive Director – Environment, Safety, Health & Quality
Revier

Mr. John Revier

executive Director – External Engagement and Communications
Kimberly Ross

Ms. Kimberly Evans Ross

General Counsel & Executive Director – Office of Risk Assurance & Compliance
Randall Hughes

Mr. Randy Hughes

Acting Executive Director – Counterintelligence and Senior Counterintelligence Officer

INL Senior Leadership Team Organizational Chart​

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Organizations and Directorates

Advanced Test Reactor Complex

The Advanced Test Reactor is the world’s premier nuclear test reactor. It provides unmatched, national priority nuclear fuel and materials testing capabilities for military, federal, university and industry partners and customers.

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This directorate is comprised of professionals in finance, contracts, project management and business systems who provide efficient and effective operations and business services that exceed customer expectations as well as an assurance system that safeguards the lab’s operational integrity. Business Management’s six divisions work as a team to enable the lab’s nationally important mission as the Department of Energy’s premier nuclear lab within a complex of 17 national labs. We are part of a community of labs that offers numerous opportunities for networking, training, mentorship and career development.

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The Counterintelligence Program protects classified and sensitive programs and information, personnel and assets from foreign intelligence collection and international terrorist activities; and to detect and deter trusted insiders who would engage in activities on behalf of a foreign intelligence service or foreign terrorist entity.​​

EES&T innovates in advanced energy systems that deliver resilient, reliable and affordable power to our nation’s energy infrastructure. The directorate develops unique technologies and capabilities to address the nation’s need for critical materials and works with industry to validate and scale their systems for commercial use.

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ESH&Q provides mission support for all aspects of INL’s key mission areas. The directorate is vital to accomplishing the lab’s mission by supporting day-to-day operations, program compliance and other support staff members.

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This directorate focuses on outreach and partnerships with regional organizations. The group includes Commercial Partnerships and Technology Transitions, Community and Regional Engagement, Governmental Affairs (state and federal), and Communications. This directorate was created as part of the Next-Level INL initiative and helps maximize mission outcomes and position INL for future success.

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This group provides a wide range of facility and support services across the laboratory. These services include facility management, sitewide utility operations, logistics, property management, infrastructure planning, engineering and construction services, fleet management and logistics, precision machining, calibration services, landfill operations, and food services.

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This office is comprised of the laboratory’s risk management functions, including Contractor Assurance, Conflicts of Interest, Supply Chain Risk Management, Export Control, Privacy, and Corporate Investigations.

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This organization is vital to the lab’s operation and instrumental to meeting its energy and national security missions. This people-first organization provides the standards, processes, tools, coaching and decision support systems to attract, engage, develop and reward talent that ensures our laboratory performs at the highest level. It is also instrumental in building a culture that adheres to our laboratory’s values.

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This directorate deploys and maintains business applications, services, and infrastructure (servers, networks, storage), and monitors, optimizes, and troubleshoots systems performance while overseeing security and governance. Additionally, IT provides technology innovation, oversight, advisory and strategy for the lab.

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MFC is a prime testing center for advanced technologies associated with nuclear power systems. This complex is the nexus of research on new reactor fuels and related materials. As such, it contributes significantly to the development of increasingly efficient reactor fuels and the important work of nonproliferation.

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This directorate protects the nation’s critical infrastructures and prevents the proliferation of weapons of mass destruction. Within both areas, INL leverages its scientific expertise, engineering discipline and unique infrastructure to develop military, homeland security, energy and industry solutions.

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INL leads the nation’s research in advanced nuclear energy technology. Scientists and engineers in this directorate perform research, development and demonstration of nuclear reactor and nuclear fuel cycle technologies, nuclear fuels and materials, and advanced modeling and simulation and artificial intelligence.

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This directorate is responsible for programs that protect, control and account for INL security- and emergency-related interests. The functions include unarmed and armed protective forces; protective force training; live fire range operations; explosive breaching operations; physical security; personnel security; foreign visits and assignments; classification and declassification; classified matter protection and control; nuclear material control and accountability; operations security; security incidents and infractions; security investigations; performance testing; security education; human reliability program; vulnerability assessment analysis; design basis threat implementation; the Site Safeguards and Security Plan; emergency planning functions; emergency response; and communication functions.​

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Not finding what you are looking for? Please send your question to [email protected].

Battelle Energy Alliance Team Members

University Partners: MIT, The Ohio State University, North Carolina State University, University of New Mexico, and Oregon State University, University of Idaho, Idaho State University, and Boise State University.

INL is managed by Battelle Energy Alliance (BEA) for the Department of Energy’s Office of Nuclear Energy. BEA is a limited liability company wholly owned by Battelle.

Contact Information

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Idaho National Laboratory

Dr. John Wagner

Laboratory Director

Dr. John C. Wagner is the director of Idaho National Laboratory and president of Battelle Energy Alliance LLC. He is responsible for management and integration of a large, multipurpose laboratory that has a mission focused on nuclear energy, national and homeland security, and energy and environment science and technology. He manages this U.S. Department of Energy national laboratory of approximately 6,000 scientists, engineers and support staff members in multiple nuclear and nonnuclear experimental facilities, with an annual budget of more than $2 billion.

Wagner began serving as INL director in 2020. He has more than 25 years of experience performing research, and managing and leading research and development projects, programs and organizations.

Wagner’s experience is strongly aligned with INL’s programmatic portfolio. He has guided and helped implement INL’s nuclear energy strategy during an innovative and exciting time at the nation’s center for nuclear energy research and development. As a recognized expert in reactor and fuel cycle technologies, he is called upon frequently to advise in formulation of policies for nuclear fuel cycles and advanced reactors.

Wagner initially joined INL as chief scientist at the Materials and Fuels Complex in 2016 and served as associate laboratory director for Nuclear Science and Technology beginning in 2017. Prior to joining INL, he worked for nearly 17 years at Oak Ridge National Laboratory, where he held several research and leadership roles in reactor and fuel cycle technologies.

Wagner is a Fellow of the American Nuclear Society and the American Association for the Advancement of Science and recipient of the 2013 E.O. Lawrence Award. He has authored or co-authored more than 170 refereed journal and conference articles, technical reports, and conference summaries. He earned a bachelor’s in nuclear engineering from the Missouri University of Science and Technology in 1992, and master’s and doctorate degrees from the Pennsylvania State University in 1994 and 1997, respectively.

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Dr. David Teter

DEPUTY LABORATORY DIRECTOR FOR MANAGEMENT & OPERATIONS, CHIEF OPERATING OFFICER

Dr. David Teter became deputy laboratory director for management and operations and chief operating officer in April 2025. Prior to INL, Teter spent nearly 30 years at Los Alamos National Laboratory, where he had extensive experience in strategic planning, managing large-scale infrastructure projects, engaging stakeholders and managing people. After earning his doctorate in metallurgical engineering from the University of Illinois Urbana-Champaign, Teter joined Los Alamos as a postdoctoral researcher. He built his career in materials science, eventually overseeing 280 staff members as division leader of materials science and technology. He then dedicated his efforts to enabling research and development through efficient operations, becoming director of the Weapons Infrastructure and Planning Office at Los Alamos. Most recently, Teter served as associate laboratory director for infrastructure and capital projects at Los Alamos, managing a $1.2 billion annual portfolio and leading over 150 campus transformation projects. His leadership demonstrates excellence in project planning, management, execution and operational leadership. As INL scales up its research, development and demonstration activities to meet national and global needs, Teter guides transformation to modernize the lab’s infrastructure, improve and streamline processes, and develop the workforce to ensure success.

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Todd Combs

Dr. Todd Combs

Deputy Laboratory Director for Science & Technology, Chief Researcher Officer

Dr. Todd Combs became deputy laboratory director for Science and Technology and chief research officer at Idaho National Laboratory in June 2024. Prior to this role, he served as associate laboratory director for Energy and Environment Science & Technology (EES&T) since 2017. His research has included energy systems modeling and analysis for DOE, most recently related to critical materials supply chains; as well as the application of modeling and simulation to national and homeland security issues for DHS and the Department of Defense. Formerly the director of the Global Security Sciences Division at Argonne National Laboratory, he led a multidisciplinary research team of over 200 that found solutions to protect against, mitigate, respond to, and recover from a wide spectrum of national and global security threats. He served 14 months as Argonne’s interim associate laboratory director for Energy and Global Security. Earlier, he managed Argonne’s advanced grid modeling program for DOE, and Argonne’s relationship with the Department of Homeland Security Science and Technology Directorate. At Oak Ridge National Laboratory, he was an operations research scientist and served as group leader of the Transportation Planning and Decision Science group. He earned a doctorate in operations research and master’s degree in operations analysis from the Air Force Institute of Technology, and is a graduate of the U.S. Military Academy at West Point.

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Dr. Jess C. Gehin

Associate Laboratory Director – Nuclear Science & Technology

Dr. Jess Gehin became associate laboratory director for INL’s Nuclear Science & Technology (NS&T) Directorate in March 2021 after serving as chief scientist for the directorate since 2018. Over his 28-year career, he has built national strategies and priorities for nuclear energy, led complex projects and organizations, and developed strong relationships with senior leaders within INL, DOE and federal sponsors, and other laboratories, companies and universities. In support of the DOE Office of Nuclear Energy, he served as the national technical director for the DOE Microreactor Program. He expanded NS&T’s strategic direction and helped develop and establish key projects to build advanced reactors at INL such as the Department of Defense’s demonstration microreactor Project Pele, and the Microreactor Applications Research Validation and Evaluation (MARVEL) Project. Previously, he held research and leadership positions at Oak Ridge National Laboratory in nuclear reactor core physics, reactor core and system technologies, reactor modeling and simulation, and fuel cycle reactor applications. While at ORNL, he served as director of the Consortium for Advanced Simulation of Light Water Reactors. He earned a bachelor’s degree in nuclear engineering from Kansas State University, and master’s and doctoral degrees from the Massachusetts Institute of Technology. His was an associate professor at the University of Tennessee, is a Fellow of the American Nuclear Society, and has authored or co-authored more than 120 refereed journal and conference articles, technical reports and conference summaries.

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Crone

Mr. Ron Crone

Associate Laboratory Director – Materials and Fuels Complex

Mr. Ron Crone has more than 25 years of experience in engineering, management and technical leadership. He served as interim associate lab director for the Neutron Sciences Directorate at Oak Ridge National Laboratory. He was responsible for the management of the neutron sciences R&D portfolio, which includes the operation of the Spallation Neutron Source and the High Flux Isotope Reactor (HFIR). He began his career in the Reactor Engineering Group at the Davis-Besse Nuclear Power Station near Toledo, Ohio. He then worked at the Yankee Rowe Nuclear Power Station in Rowe, Massachusetts, as a reactor engineer and shift technical adviser. He moved to Tennessee and joined the staff of the HFIR in the Research Reactors Division (RRD) in January 1992. He holds a bachelor’s degree in nuclear engineering from the University of Cincinnati and a master’s degree in engineering from the University of Alabama at Huntsville.

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O'Kelly

Dr. Sean O’Kelly

Associate Laboratory Director – Advanced Test Reactor

Dr. Sean O’Kelly has served at Idaho National Laboratory for more than a decade and has over 40 years of experience in the nuclear field. His expertise spans research and test reactors, accelerator-driven subcritical systems, and nuclear instrumentation. Since 2008, he has chaired the International Atomic Energy Agency’s Technical Working Group on Research Reactors, representing the majority of the world’s research reactors.

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Shannon Bragg-Sitton

Dr. Shannon Bragg-Sitton

Associate Laboratory Director — Energy and Environment Science and Technology

Dr. Shannon Bragg-Sitton became associate laboratory director for INL’s Energy and Environment Science and Technology (EES&T) directorate in 2024. In this role, she oversees EES&T's 350-plus member team dedicated to a diverse energy agenda. She steers INL’s research efforts in microgrid systems, water treatment, critical materials, and chemical production while harnessing cutting-edge technology to integrate nuclear and other energy sources into the grid and industrial sector more efficiently. Shannon is an internationally esteemed leader in coupling nuclear energy with other advanced energy sources for optimal energy use and has been instrumental in advancing energy systems integration, ensuring generator profitability, and enhancing grid reliability and resilience. Her academic journey began at Texas A&M University, where she earned a bachelor's degree in nuclear engineering, followed by a master's degree in medical physics from the University of Texas at Houston, and culminating in master's and doctorate degrees in nuclear engineering from the University of Michigan. Her career also includes a tenure as an assistant professor of nuclear engineering at Texas A&M and a role at Los Alamos National Laboratory in space power and propulsion systems. Shannon's contributions have earned her the distinction of Fellow of the American Nuclear Society and the honor of winning the Department of Energy’s Secretary of Energy Achievement Award twice.

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Portrait: Zachary Tudor

Mr. Zachary (Zach) Tudor

Associate Laboratory Director – National & Homeland Security Science & Technology

Zachary (Zach) Tudor is the associate laboratory director of Idaho National Laboratory’s National and Homeland Security Science and Technology directorate, a major U.S. center for national security technology development and demonstration, employing over 800 scientists and engineers across more than $550 million in nuclear nonproliferation, critical infrastructure protection, and defense systems programs for the Department of Energy, Department of Defense, Cybersecurity and Infrastructure Security Agency, and the intelligence community. A retired U.S. Navy submarine electronics officer, he is the former chair of the International Information Systems Security Certification Consortium’s board of directors, a member of Virginia’s Commonwealth Cyber Initiative advisory board and the former vice chair of the Institute for Information Infrastructure Protection at George Washington University.

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Iris Anderson

Ms. Iris Anderson

Chief Financial Officer & EXECUTIVE Director – Business Management

Ms. Iris Anderson is the chief financial officer at Idaho National Laboratory with 29 years of experience in finance and accounting. As the CFO and executive director of Business Management at INL, she is responsible for the development and implementation of the laboratory’s financial strategy and planning. The CFO facilitates the linkage of the laboratory’s strategic objectives with institutional financial strategies and measurable goals. Before joining INL, Ms. Anderson served as the controller and manager of Financial Operations and had managed the Business Development & Analysis group at Pacific Northwest National Laboratory (PNNL). She served on PNNL’s Research Operations Council (ROC), as a member of the Brookhaven Laboratory Business & Audit Committee, and on the Battelle Pension Management Investment Committee. Previously, she held financial positions for US West NewVector Group and US Bank. The Tri-City Regional Chamber of Commerce honored her with the ATHENA International Award, which honors women for professional excellence, community service, leadership skills, and actively assisting other women in attaining professional excellence. She holds a B.A. in finance from the University of Washington.

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Shawn Hill

Mr. Shawn Hill

executive Director – Facilities & Site Services

Mr. Shawn Hill is the executive director of Facilities and Site Services (F&SS) at Idaho National Laboratory and has 39 years of experience in facilities operations, maintenance and training. With more than 700 employees, the F&SS organization is responsible for INL’s non-nuclear facilities, supporting infrastructure and infrastructure transformation programs, land management, bus operations, fire department, and expansive mission-enabling support and logistics services. During his career, he has held numerous management and leadership roles with the Department of Energy's Idaho Operations Office and INL starting in 1995. He was previously the reactor division director at the Materials and Fuels Complex. Prior to that, he was the Advanced Test Reactor operations division director, and he served as ATR's training manager, responsible for training all personnel at the ATR Complex and ensuring compliance with DOE orders for safe and efficient reactor operations. He served as a DOE-Idaho deputy federal project director, providing oversight of the Integrated Waste Treatment Unit project, and as a facility representative at the Idaho Nuclear Technology and Engineering Complex (INTEC). He is a veteran of the U.S. Navy's Nuclear Propulsion Program, having served as a submarine machinist mate aboard the USS Grayling. He holds a bachelor's of science in applied science and technology with a nuclear engineering technology emphasis from Thomas Edison State University.

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Kase Brock

Mr. Kase Brock

Executive Director – Safeguards and Security

Mr. Kase Brock is executive director of INL’s Safeguards and Security Directorate. He has over three decades of experience in the security realm and leads a team of more than 500 people. Safeguards and Security is responsible for programs that protect INL facilities, people, government property, and associated security interests, including special nuclear material, spent nuclear fuel, radioactive waste, classified and unclassified materials, security training, emergency communications, and the protective force. Brock was the senior advisor to the Safeguards and Security executive director at INL from 2019 to 2024. Before joining INL, he had a distinguished 21-year career as a U.S. Army Special Forces officer and served as an intelligence professional. He was awarded the Legion of Merit Medal, multiple Bronze Stars, the Purple Heart and many other military recognitions for his exceptional service. He holds a bachelor's in management from the United States Military Academy at West Point and a master’s degree in strategic security studies from the National Defense University. He also holds a professional certificate in nuclear security fundamentals from Texas A&M University.

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Mr. Mark Holtermann

Chief Information Officer & Executive Director – Information Technology

Mr. Mark Holtermann comes to Idaho National Laboratory with over 30 years of experience in information technology (IT), including the past 17 years within the energy and utilities industry. In his role at INL, he helps provide critical support to the lab’s research mission. INL relies on the Information Technology directorate for the tools, systems and capabilities that enable the lab’s daily tasks, as well as facilitating and protecting the vast amounts of data and information that flow daily across INL’s digital networks. In his career, Mark has delivered business-driven, customer-focused digital solutions, most recently as vice president for information technology and digitization at NAES Corporation. NAES is the power generation industry’s largest independent services provider, and the company operates and maintains more than 200 power generation facilities, spanning more than 96 gigawatts. He holds a bachelor’s degree in business administration from the University of Memphis and a master’s degree in international business administration from Nova Southeastern University.

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Heidi Dillard

Ms. Heidi Dillard

CHIEF HUMAN RESOURCES OFFICER & EXECUTIVE DIRECTOR – HUMAN RESOURCES

Heidi Dillard is Idaho National Laboratory’s chief Human Resources officer and executive director for Human Resources. In this role, she leads an organization focused on providing the standards, processes, tools, coaching and decision support systems to attract, engage, develop, and reward talent for over 6,400 researchers and support staff. Heidi has over two decades of experience in human resources, business operations and people management. Prior to joining INL in 2024, she served as the chief people officer for Federated Wireless in Arlington, Virginia, where she partnered with the Chief Executive Officer on all human capital functions and was instrumental in building a company culture focused on professionalism, collaboration and outcomes. She has also worked as the chief human resources officer for Phlow Corporation, a public-benefit pharmaceutical manufacturing company. Before that, she worked as the chief human resource officer for OneWeb Limited, a satellite telecommunications company focused on low earth orbit satellite connectivity. Heidi is a graduate of the United States Military Academy at West Point and served in the U.S. Army for over six years, leading soldier teams ranging from 30 to 1,200. She received her master’s degree in human resources management from Cornell University and completed the Executive and Leadership Coaching Certification Program at Columbia University in New York.

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Mr. Eric Papaioannou

Executive Director – Environment, Safety, Health & Quality

With more than 34 years of experience, Mr. Eric Papaioannou leads INL’s Environment, Safety, Health & Quality Directorate. Previously, he led INL’s Materials and Fuels Complex (MFC) Operations, Maintenance, Infrastructure and Fabrication Division where he was responsible for operations in all of MFC’s nuclear and radiological facilities. He began his career in the United States Naval Nuclear Propulsion Program, joined Argonne National Laboratory-West in 1998 as an operator in the Fuel Conditioning Facility, spent seven years as a criticality safety engineer, and then moved into progressing roles in nuclear operations. He holds a bachelor’s degree in physics with an emphasis in health physics from Idaho State University.

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Revier

Mr. John Revier

EXECUTIVE DIRECTOR – EXTERNAL ENGAGEMENT AND COMMUNICATIONS

Mr. John Revier is the executive director of INL’s External Engagement and Communications directorate. In this role, he helps make INL an innovation leader and strong partner to governments, academia and industry across the region and beyond. His focus on the externally facing elements and activities at the laboratory helps INL speak with a single voice to external audiences. Prior to this role, he served for seven years as the director of State and Regional Government Affairs for INL, where he was the primary interface for the laboratory with the state of Idaho, local governments and other stakeholders within the region. Before joining INL, Revier served for over 14 years as Idaho Rep. Mike Simpson’s legislative director and deputy chief of staff. Prior to that, he worked for Minnesota Sen. Rod Grams in both his state and Washington, D.C., offices. Revier is a native Minnesotan and graduate of Mankato State University.

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Kimberly Ross

Ms. Kimberly Evans Ross

General Counsel & Executive Director – Office of Risk Assurance & Compliance

Ms. Kimberly Evans Ross leads an organization focused on protecting the laboratory’s people, property and mission by identifying existing and emerging risks, managing risks to minimize unplanned events, and providing information and analysis to inform decisions. Prior to joining INL in 2014, Kimberly’s legal practice included complex commercial litigation, civil RICO and employer defense litigation. In addition to managing the Office of General Counsel and the Office of Risk, Assurance and Compliance, Kimberly also serves as a subject matter expert in employment law, corporate governance and strategic risk management. Her research activities include developing an effective compliance program to improve workflow efficiencies and minimize organizational risk, and legal compliance hurdles for employers with remote workers across the country. She received a bachelor’s degree in English with distinguished honors from Boise State University, and a Juris Doctor with honors from University of North Carolina at Chapel Hill.

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Randall Hughes

Mr. Randall Hughes

Acting Executive Director – Counterintelligence and Senior Counterintelligence Officer

Mr. Randy Hughes, acting executive director for Counterintelligence and senior counterintelligence officer, leads Idaho National Laboratory’s counterintelligence team. He has a wealth of experience in conducting counterintelligence and criminal investigations, risk assessments and mitigation strategies, program management, policy development, and protecting critical technologies and information. Hughes also leads INL’s Office of Internal Investigations. He brings extensive relevant experience, having recently served as executive director of Safeguards and Security for six years and previously leading INL's Counterintelligence Office from 2010 to 2018. Before joining INL, Hughes was a special agent in the Naval Criminal Investigative Service (NCIS), where he gained extensive experience in matters related to security, law enforcement, counterintelligence and counterterrorism. He retired from NCIS after 21 years of distinguished service in numerous locations, including duty stations in the Middle East, Europe and Asia-Pacific regions. While in federal service, he served in field and senior management positions.

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