Executives

Jay Jiang Yu
Founder, Executive Chairman and President
Jay Jiang Yu
Mr. Yu is a serial and leading U.S. advanced nuclear technology entrepreneur with 20 years of capital markets experience. He is a private investor in a multitude of companies and has advised a magnitude of company executives with corporate advisory services such as capital funding, mergers & acquisitions, structured financing, corporate restructuring, and other business development services geared at taking these companies to the next level. He is a self taught and private self investor, his relentless passion for international business has helped him develop key, strategic and valuable relationships throughout the world.
Mr. Yu leads the corporate structuring, capital financings, executive level recruitment, governmental relationships and international brand growth of NANO Nuclear Energy Inc. Previously, Mr. Yu worked as an Analyst part of the Corporate & Investment Banking Division at Deutsche Bank on Wall Street in New York City.
Mr. Yu is the founder and chairman of NANO Nuclear Energy Inc., a vertically integrated advanced portable microreactor technology company publicly listed on the NASDAQ Exchange. Under his leadership, NANO Nuclear Energy acquired one of the highest technology readiness level (TRL) and patented advanced microreactors in development, reached over $3 BILLION Market Capitalization in value, raised over $600 MILLION to date and became Wall Street’s Cinderella story of 2024 as the #1 Top IPO Performer. In 2021, Mr. Yu was honored as one of The Outstanding 50 Asian Americans in business. He is an active Philanthropist and the founder of a Non-Profit Organization that helps nurture New York City kids through sports and education. Mr. Yu worked and continued his studies at Columbia University after earning a BA in Psychology from City College of New York.

James Walker, BEng, MSc, CEng, CPhys, PEng
CEO & Board Member
James Walker, BEng, MSc, CEng, CPhys, PEng
Mr. Walker is a Nuclear Physicist and Nuclear Engineer, with experience in reactor core manufacturing facilities, primary and secondary reactor systems, and nuclear fuel reclamation plants. He has worked as a nuclear physicist and thermal-hydraulicist on the U.K. successor class of submarines, and was the U.K. Ministry of Defence subject matter expert for nuclear fuel reclamation.
Mr. Walker has extensive experience in engineering and project management across domains, such as mining engineering, mechanical engineering, construction, manufacturing, and infrastructure. Mr. Walker has executive experience with several public companies as well as financing, company structuring and organization.
Mr. Walker holds degrees in Mechanical Engineering, Mining Engineering, and Nuclear Physics and Engineering, as well as qualifications in Project Management and Accountancy. He is a Chartered Physicist with the Institute of Physics, a Charted Engineer with the IMechE, a Project Manager Professional with the APM, and a Professional Engineer in North America.

Jaisun Garcha, MBA, CPA, CGA
Chief Financial Officer
Jaisun Garcha, MBA, CPA, CGA
Jaisun Garcha has 20 years of experience in financial management, corporate governance, and risk management in both public and private companies, including high-growth and start-up stage organizations. He has taken several companies public through IPOs and RTOs and has been the CFO for multiple publicly traded companies in the last decade.
Senior Leaders

Oscar Leandro, MBA
VP of Corporate Development
Oscar Leandro, MBA
Oscar Leandro is an accomplished investment professional and entrepreneur with a robust track record in alternative investments and energy development. With a global perspective honed through diverse international experiences, Oscar brings a wealth of expertise in frontier market investments, corporate finance, and technology-driven ventures.
Oscar served as a Principal at Green Swan Capital, an alternative investment firm, focusing on innovative gas flaring reduction projects in frontier markets. His strategic vision and leadership have been instrumental in sourcing investment opportunities across Latin America. He has also held pivotal roles in financial advisory at Deloitte Consulting, contributing to major M&A transactions and valuations across various industries, and as a Summer Fellow at KAUST Investment Management Company, where he developed special situations investment strategies for one of the world’s largest endowments.
Oscar holds a Master of Business Administration and a Master of Arts in International Studies from The Wharton School and the Lauder Institute at the University of Pennsylvania. Awarded a prestigious merit-based fellowship, he conducted his master's thesis on the social and environmental impacts of electric vehicle supply chains. He led healthcare consulting projects in East Africa for the Wharton Global Health Volunteers and served as president of the Wharton Latin American Student Association. His international experiences are complemented by summer exchanges at the London School of Economics, Peking University, and Sciences Po Paris. Oscar is a Westerwelle Foundation Young Founder, a distinction awarded to outstanding entrepreneurs from emerging markets, and he earned a Global Competitiveness Leadership certificate from Georgetown University as part of a fellowship sponsored by Georgetown’s Latin American Board.

Gregory Sachs, PE
Gregory Sachs, PE

Ion C. Moraru, Ph.D.
Senior Vice President of Technology Legal Affairs
Ion C. Moraru, Ph.D.
Ion C. Moraru is a highly technical attorney with extensive experience as counselor and legal service provider. Mr. Moraru has worked with various clients operating in advanced technological and global industries developing sophisticated legal strategies to achieve business objectives.
Before joining NANO Nuclear Energy, Mr. Moraru worked as both law firm attorney and in-house attorney, and also founded a law firm. Mr. Moraru is admitted in the State of Illinois, and was selected to 2026 Illinois Rising Stars for excellence in practice. Mr. Moraru is also registered with the United States Patent and Trademark Office, and is admitted to the General Bar in the Northern District of Illinois.
Mr. Moraru completed his legal studies at Chicago-Kent College of Law of the Illinois Institute of Technology, and earned a Ph.D. in physics from Michigan State University. Mr. Moraru also worked as post-doctoral researcher in physics at the University of Illinois, Urbana-Champaign.
Diana Chung
Director of Human Resources
Diana Chung
Matthew Barry, CPA, CFA
Director of Investor Relations
Matthew Barry, CPA, CFA
Matt has over 10 years of experience in accounting, equity research and investor relations at both public and private companies. He began his career at Deloitte, where he audited the financial statements and internal controls of various public and private clients across various industries. Matt served as an equity research analyst at investment banks H.C. Wainwright and Cowen and Company, where he covered an aggregate portfolio of approximately 40 companies across both firms, creating complex financial models and analyzing a wide range of macroeconomic and industry data and trends. He later served as Manager of Investor Relations at Veeco Instruments Inc. (NASDAQ: VECO), a Nasdaq-listed global capital equipment provider, where he led the investor relations function. At Veeco, he successfully developed an in-house investor targeting program and was instrumental in attracting investment from multiple ideal long-only long-term oriented investors who initiated substantial positions in the company.
Matt earned his Certified Public Accountant (CPA) license in 2017 and Chartered Financial Analyst (CFA) designation in 2024. He holds a Bachelor of Business Administration in Accounting and a Master of Science in Taxation from Hofstra University where he received the FEI Top Accounting Student award.
Winston Chow, MBA, MPA
VP of Global Policy
Winston Chow, MBA, MPA
Mr. Winston Chow has led the international adoption of sustainable energy and infrastructure for almost two decades, financing and deploying over $2 billion in projects. Mr. Chow's career in the renewable energy space has helped build the world's largest solar power plant and provided access to clean energy for more than 37 million people. He has worked with governments and corporations for over 30 nations, spanning the U.S. and China, East and Southeast Asia, the Middle East, and North Africa. He brings extensive consulting and advocacy experience and networks with governments and energy industries throughout the developed and developing worlds.
Mr. Chow has served as Senior Advisor to the U.S. Department of Energy on East Asia, where he implemented two US-China Agreements on clean energy between Presidents Barack Obama and Hu Jintao. He's also worked across Asia and Africa as a diplomat for intergovernmental U.N. observer-organization, Global Green Growth Institute, to decarbonize China's global Belt and Road Initiative. The U.S. Department of Energy has bestowed two meritorious service awards for his work.
Mr. Chow has also led over $26 million in projects for the U.S. Agency for International Development (USAID), co-managing the U.S. Government's flagship clean energy development initiative in Southeast Asia. His work has catalyzed a joint partnership between the United States and Australian governments to drive energy infrastructure transition through Thailand, China, Vietnam, Laos, Cambodia, and Myanmar.
In the private sector, Mr. Chow served as Senior Director for New York clean energy startup CleanEdison, building its government business across 48 States. He is Senior China Advisor on Energy, Environment and Social Impact to Al Gore-backed company, Globality Inc., and frequent news commentator on energy and environment for China Global Television Network. Mr. Chow holds a master's degree in public administration and a bachelor's in international politics from Columbia University in the City of New York, and an M.B.A. from the Kelley School of Business.
John G. Vonglis
Executive Director of Global Government Affairs
John G. Vonglis
Mr. Vonglis served as the Senate-confirmed Chief Financial Officer and Chief Risk Officer of the U.S. Department of Energy from 2017 to 2019. As CFO, John oversaw all financial matters for the Department of Energy. He was also appointed by the President as Acting Director of the Advanced Research Projects Agency-Energy (ARPA-E), a federal agency focused on advancing early-stage, high-potential, high-impact energy technologies while minimizing risk to taxpayers.
Prior to his tenure at the Department of Energy, John held several key roles at the Department of Defense from 2002 to 2009, initially as Director of Management Initiatives for the Under Secretary for Personnel and Readiness (P&R) and lastly as Acting Assistant Secretary (CFO) of the U.S. Air Force, where he also served as the first Chief Management Officer, performing the duties of the Under Secretary.
John’s private sector experience includes senior financial and operational roles at prominent advisory, aerospace/defense, financial services, and high-technology firms, such as Grumman Aerospace, The First Boston Corporation, PricewaterhouseCoopers, and IBM. Additionally, John is a Colonel in the U.S. Army Reserve and has advised the Army Cyber Institute at West Point. He holds a B.S. and M.B.A. from Fordham University and a Master’s in International Public Policy from The Johns Hopkins University School of Advanced International Studies (SAIS).
Technical Leaders
Alisha Kasam-Griffith
Chairman of Executive Advisory Board
Alisha Kasam-Griffith
Milos Atz
Chairman of Executive Advisory Board for Military and Defense
Milos Atz
Michael Montecalvo
Director of Licensing
Michael Montecalvo
Mr. Montecalvo has over 30 years of experience in the nuclear field including military, government, and industry. He began his nuclear career in the U.S. Navy as a Submarine Electrician, was an instructor at the S8G prototype and ended his enlistment aboard the USS Greeneville (SSN-772).
Mr. Montecalvo transitioned to the commercial nuclear industry with positions in Operations, Maintenance, Work Control, and Human Performance. He served as the Technical Assistant to two Chief Nuclear Officers and is a previously NRC licensed PWR Senior Reactor Operator and Shift Technical Advisor. While at the NRC he supported technical reviews and risk assessments for the operating reactor fleet and was involved in furthering advancement of risk-informed performance-based regulation. He has experience with advanced reactor licensing for both power reactors and non-power utilization facilities.
Mr. Montecalvo holds a B.S. degree in Applied Arts and Sciences from Rochester Institute of Technology and a B.S. degree in Nuclear Engineering Technology from Excelsior College. He is also a previous World Nuclear University Summer Institute Fellow.
Michael Norato
Director of Fuel Cycle Facilities and Infrastructure
Michael Norato
Dr. Norato has over 25 years of experience in chemical separations technologies involving used nuclear fuel and radioactive wasteprocessing, as well as experience in commercial nuclear industry regulation and nuclear facility decommissioning. His broad nuclear energy related background includes leadership positions at the Idaho National Laboratory (INL), U.S. Department of Energy Office of Environmental Management (DOE-EM), the U.S. Nuclear Regulatory Commission (NRC) and the Savannah River National Laboratory (SRNL).
Dr. Norato recently retired from INL, where he served as a Senior Advisor for Research Operations and Strategic Projects, after serving four years as Division Director for Fuel Cycle Science & Technology. His primary focus been the research and development of advanced technologies for nuclear fuel cycle and used nuclear fuel management, as well as other chemical and physical separations applications.
At DOE-EM, he served as Director of the Office of Operations and Processes, as well as Acting Director of the Office of Major Construction and Modifications where he provided leadership and developed mission strategies, policy, and guidance for complex-wide engineering operations and processes, as well as to major construction projects and facility modifications to support EM’s mission. His NRC experience spanned the spectrum from lead chemical safety reviewer for the MOX Fuel Fabrication Facility license application, to component engineering reviews for new BWRs, to contract management, to nuclear materials facility decommissioning. Dr. Norato has extensive knowledge of the entire nuclear fuel cycle as well as experience in the commercial regulatory regime and all aspects of licensing, constructing, and regulating nuclear fuel cycle facilities, He also has broad knowledge of fuel cycle research development and demonstration at all scales and TRL levels. Dr. Norato holds BS, MS and PhD degrees in Chemical
David Tiktinsky
Head of Fuel Cycle Facility Licensing
David Tiktinsky
Mr. Tiktinsky has been an Senior Nuclear Regulatory Licensing Specialist and advisor to some of the most well known advanced nuclear technology companies in the nation. In this role, he assisted current and new applicants and licensees in licensing nuclear fuel cycle and medical isotopes facilities regulated by the Nuclear Regulatory Commission (NRC). Mr. Tiktinsky previously had 39 years of licensing and project management experience working for the NRC. He has extensive knowledge of the commercial regulatory regime and all aspects of licensing, constructing, and regulating nuclear fuel cycle and medical isotopes facilities. His experience and knowledge can benefit NRC applicants and licensees seeking to successfully navigate the NRC fuel cycle related licensing process in an effective and efficient manner.
Mr. Tiktinsky has extensive knowledge in implementing review guidance from NUREG-1520, the Standard Review Plan for Fuel Cycle Facilities License Applications. His 39-year NRC career included Project Management of complicated fuel cycle facility licensing actions including commercial and government sponsored activities, and medical isotope facilities. It also included evaluations of security aspects of radioactive material facilities after the attacks of 9/11/01, certification of radioactive material transportation packages, and high-level nuclear waste disposal.
Mr. Tiktinsky has a B.S. degree in Mining Engineering from the University of Arizona.
Advisors
Massimiliano Fratoni
Professor
Senior Director and Head of Reactor Design
Massimiliano Fratoni
Massimiliano Fratoni is Xenel Distinguished Professor and Chair in the Department of Nuclear Engineering at the University of California, Berkeley (UCB). He received a Laurea in Nuclear Engineering from Università di Roma “La Sapienza” (Italy), and a MSc and a PhD from the University of California, Berkeley. Prior to joining the Nuclear Engineering Department at UCB, he held a Research Scientist position at the Lawrence Livermore National Laboratory and a faculty position at The Pennsylvania State University.
Prof. Fratoni’s main research interests are in sustainable nuclear energy through advanced reactors and advanced fuel cycles. His research is focused on developing innovative engineering solutions that will facilitate the widespread deployment and adoption of advanced nuclear energy technologies. Prof. Fratoni is author of more than 200 publications in the areas of advanced reactors and advanced fuel cycles. He received the American Nuclear Society Early Career Reactor Physicist Award (2018) and the Untermyer & Cisler Reactor Technology Medal (2024).
Peter Hosemann
Professor
Head of Nuclear Reactor Design and Materials
Peter Hosemann
Professor and Former Department Chair of Nuclear Engineering Department in UC Berkeley. Prof. Hosemann’s career started at the Montanuniversitaet Leoben in Austria where he received his Ph.D. and MS degree in Material Science. He joined Los Alamos National Laboratory in 2005 as a graduate research assistant and continued as a Post doc from 2008-2010 before joining UC Berkeley’s nuclear engineering department.
Prof. Hosemann had numerous research stays at the Paul Scherrer Institute in Switzerland and Los Alamos National Laboratory. His research features experimental material science for extreme environments, especially nuclear environments. His focus is on structural materials used for nuclear components (fission, fusion, spallation, etc.) while developing a basic understanding of the materials degradation processes and resulting consequences to engineering application.