HI-STAC, Holtec International SMR Technical Advisory Council, consists of recognized industry leaders with a corporate nexus to Holtec International. HI-STAC provides Holtec’s executive leadership with input on the technical and commercial merits and weaknesses of the SMR-160 program. This august body of industry leaders reviews and critiques the SMR-160 at bi-annual meetings, challenging design and plant operational decisions, providing insightful advice and direction, and effectively informing the design development through the eyes of experienced owner/operators. Their experience, commitment and input to the SMR-160 program is invaluable.

HI-STAC Membership includes (in alphabetical order):

Chris Bakken

Chris Bakken

Executive Vice President of Nuclear Operations and Chief Nuclear Officer, Entergy Nuclear

Christopher “Chris” Bakken III is responsible for Entergy’s nuclear plants located in New York, Massachusetts, Vermont, Michigan, Louisiana, Mississippi and Arkansas, as well as the company’s management services to the Cooper Nuclear Station for the Nebraska Public Power District. 

Samuel L. Belcher

Senior Vice President, Operations, FirstEnergy Utilities

Sam Belcher is senior vice president, Operations, for FirstEnergy Utilities, a subsidiary of FirstEnergy Corp. Belcher joined the company as FENOC (FirstEnergy Nuclear Operating Company) senior vice president and chief operating officer in December 2012 from Constellation Energy Nuclear Group, where he was senior vice president, Site Operations.

Brad Berryman

Brad Berryman

Senior Vice President and Chief Nuclear Officer, Susquehanna Nuclear, LLC, Talen Energy

Brad Berryman serves as Talen Energy’s Senior Vice President and Chief Nuclear Officer, responsible for overseeing all aspects of the Company’s Susquehanna nuclear power plant, a two-unit, 2,500 megawatt facility in Salem Township, Luzerne County, Pennsylvania.

Tricia Breeger

President, Mitsubishi Electric Power Products, Inc.

Tricia Breeger is a 22-year employee of Mitsubishi Electric Power Products, Inc. (MEPPI) where she is recognized for her leadership, industry experience, and business acumen.  MEPPI, a US affiliate of the Mitsubishi Electric Corporation of Japan, serves the North American power systems, critical power, and rail transportation industries with electrical and electronic products, systems, and services. 

Young Choi

Senior Vice President and Chief Operating Officer, Nuclear Energy Group, Hyundai Engineering & Construction

Young Choi is Senior Vice President and Chief Operating Officer, Nuclear Energy Group, Hyundai Engineering & Construction (HDEC). He is responsible for managing all aspects of the HDEC’s Nuclear Business.

Stuart Crooks

Managing Director, Hinkley Point C

In a career spanning 34 years, Stuart Crooks has made a vital contribution to the UK’s nuclear energy industry. His vision, drive and commitment has seen HPC, one of Europe’s largest construction sites, make significant progress on schedule and to the exacting quality and safety standards required. 

Greg Cullen

Greg Cullen

Vice President, Energy Services and Development, Energy Northwest

Greg Cullen joined Energy Northwest in 1993 and currently holds the position of Vice President of Energy Services and Development.  In this capacity, Greg is responsible for the operation and maintenance of Energy Northwest’s non-nuclear generating plants and the instrument calibration and environmental testing labs.  

Dr. Stephan Werner Döhler

Stephan Werner Dohler, PhD

Consultant, HI-STAC

Dr. Stephan Werner Dohler is a member of the Management Board & Head of Division Nuclear Energy Axpo Power AG. He is also CEO Nuclear Power Plant Leibstadt AG & Nuclear Power Plant Beznau and Vice President Board of Directors ENERTRAG AG, Germany (wind power projects and power production, 800 MW installed).

José A. Gago


José A. Gago serves as the General Manager and CEO of ANAV, the operator of 3 PWR 1,000 MWe nuclear reactors (Ascó 1 & 2 and Vandellós II) at 2 sites in Tarragona (Spain), since May 2012, after joining ANAV in 2009, initially as its Fuel Manager, later on as the Quality Group Manager. 

David Hamilton

David Hamilton

Chief Nuclear Officer, Energy Harbor

David Hamilton is responsible for the oversite and the safe and reliable operation of three nuclear stations, providing over 33TWhrs of clean energy, in Ohio and Pennsylvania. David has a Master’s degree in Business Administration from the University of Delaware, a Bachelor’s degree in Nuclear Engineering from The Pennsylvania State University. 

Brian Heery

Brian Heery

President and Chief Executive Officer, MEPPI

Brian Heery is President and Chief Executive Officer for MEPPI. The company has two business groups, each with several operating divisions. The Power Systems Group primarily serves the electric utility markets with generation and substation products. The Public Utilities Group serves diverse markets with heavy electrical infrastructure products. Mr. Heery joined MEPPI in Houston TX in 1989 as a Region Manager for the Central United States.

Kelvin Henderson

Senior Vice President and Chief Nuclear Officer, Duke Energy

Kelvin Henderson serves as senior vice president and chief nuclear officer for Duke Energy. He is responsible for the safe and efficient operation of the nation’s largest regulated nuclear generating fleet. Kelvin brings more than 26 years of experience to the position and a deep knowledge of nuclear operations. A native of Zion, Ill., Kelvin earned a Bachelor of Science degree in mechanical engineering from Bradley University in Peoria, Ill. 

Andrew Kadak, PhD

Consultant, HI-STAC

Dr. Kadak has led license renewal of operating reactors, systematic evaluation of older plants to allow them to demonstrate compliance to new regulations, financial rate proceedings to assure adequate capital for safe operation, innovative fuel purchase agreements, high level nuclear waste disposal, and storage solutions.

Petro Kotin

Acting President of SE NNEGC “Energoatom”

Petro Kotin is Acting President of SE NNEGC “Energoatom.” He was awarded with the award pins “Honorary Worker of Nuclear Energy”, “Excellence in Nuclear Energy” and honors “For a significant contribution to the development of nuclear energy in Ukraine”.

Maria Korsnick

Maria Korsnick

Chief Operating Officer, NEI

Maria Korsnick is an acclaimed nuclear engineer with a long record of service to the nuclear power industry. She is NEI’s chief operating officer. In this role, she is responsible for the Government Affairs, Strategic Planning and Policy, Suppliers and International Programs, Nuclear Generation and Communication divisions.

Marilyn Kray

Marilyn C. Kray

Vice President, Nuclear Technology and Strategy, Exelon Generation

Marilyn Kray is responsible for leading major initiatives related to current and advanced reactor designs to create growth opportunities that leverage Exelon’s nuclear operations competency.  These initiatives include pursuing operational service agreements both domestically and internationally as well as engaging with advanced reactor developers to evaluate potential business opportunities and future deployment of the technology.

Shane Lies

Chief Operating Officer, NEI

Shane Lies is senior vice president and chief nuclear officer, responsible for oversight of American Electric Power’s Donald C. Cook Nuclear Plant in Bridgman, Michigan. Cook is a dual-unit nuclear site with a total generating capacity of 2,150 megawatts. He reports to Lisa Barton, AEP executive vice president and chief operating officer.

Chris Mudrick

Chris Mudrick

Executive Vice President and Chief Nuclear Officer, Bruce Power

Chris Mudrick has more than 33 years of experience in the nuclear power industry. Prior to joining Bruce Power, Chris held the role of Senior Vice-President, East Operations, at Exelon Nuclear, and Chief Operating Officer, Constellation Energy Nuclear Group. In this role, he was responsible for 10 of Exelon’s 21 nuclear reactors at six sites in the United States.

Dominique Minière

Dominique Minière

Chief Strategic Officer, Ontario Power Generation

Dominique Minière is responsible for developing, planning, executing and managing the strategy for the business to achieve mid to long-term growth opportunities including new electricity generation, decommissioning strategies and provision of other services in the nuclear industry.

Yuriy O. Nedashkovskiy

Yuriy O. Nedashkovskiy

Consultant, HI-STAC

Yuriy Nedashkovskiy is the former President of Energoatom. From 1983 to 2000, he worked at the Khmelnytsky Nuclear Power Plant, where he passed the career path from lineman of border equipment to Director General of station. In 1983 he graduated from the Odessa Polytechnic Institute majoring in “Nuclear Plants and Installations” specialization.

Ken Peters

Luminant Senior Vice President and Chief Nuclear Officer

Ken Peters is the Chief Nuclear Officer for Vistra Energy/Luminant.  Peters is responsible for the safe, reliable and cost-effective operation of the Comanche Peak nuclear power plant, in compliance with federal, state and local laws and regulations.  

Dr. Tony Williams

Dr. Tony Williams has more than 35 years of experience in the nuclear industry. He is currently head of nuclear fuel for the Swiss Electricity Utility Axpo Power AG, the company responsible for the general- and fuel-management of the two Beznau PWR units and the Leibstadt BWR in Switzerland.

Holtec International officers responsible to manage the activities of the HI-STAC:

Pierre Paul Oneid

Senior Vice President and Chief Nuclear Officer
Secretary, HI-STAC

Pierre Paul Oneid is the Senior Vice President and Chief Nuclear Officer of Holtec International. Mr. Oneid is also the corporate executive responsible for the Nuclear Power Division and the Heat Transfer Division. He also serves as the Chairman of the Holtec International’s Executive Committee.

Tom Marcille

Vice President of Reactor Technologies
Deputy Council Secretary, HI-STAC

Tom Marcille is Vice President of Reactor Technologies at Holtec International with the ultimate responsibility to develop and license SMR-160, a unique and innovative passive light water reactor system for the emerging global power markets.