Amprius was founded
Silicon anode design finalized
kWH scale manufacturing started
Secured our first sales
Completed IPO, began trading on NYSE
Launched MWh scale expansion and GWh-scale contract manufacturing partnerships
We’re energizing purposeful innovation across industries.
Our dedicated team tirelessly pursues breakthroughs—setting new standards in battery technology.
Meet the minds that advance battery technology.
Dr. Sun has served as Amprius’ President and Chief Executive Officer since February 2017 and as a director on the Amprius Board since December 2016. Dr. Sun has also served as President, Chief Executive Officer and a director of Amprius, Inc. since March 2010. He also has served as a director of Berzelius (Nanjing) Co., Ltd. (formerly known as Amprius (Nanjing) Co., Ltd.) since 2017 and Apex (Wuxi) Co., Ltd. (formerly known as Amprius (Wuxi) Co., Ltd.) from November 2014 to November 2023, both entities of which were spun off from Amprius, Inc. in 2022. Prior to joining Amprius, Inc., Dr. Sun led two business ventures in the renewable energy space, serving as President and Chief Operating Officer of JA Solar Co. Ltd., a manufacturer of high-performance photovoltaic products, and as chairman and Chief Executive Officer of RayTracker Inc., an advanced solar tracking system company that was acquired by First Solar Inc. Prior to that, he held senior executive positions in several large business enterprises and technology start-ups, including Vice President and General Manager at Honeywell International Inc. and Vice President of Technology at Canon Production Printing (formerly Oce, N.V.). Dr. Sun holds a Ph.D. in Chemistry from Brown University, an M.S. degree in Chemistry from the University of Georgia and a B.S. degree in Chemistry from Nanjing University, China.
Ms. Wallach has served as Amprius’ Chief Financial Officer since August 2021. Prior to joining Amprius, Ms. Wallach served as the Chief Financial Officer of Identiv, Inc., a publicly held authentication and security solutions company from February 2017 to August 2021. Prior to that, she served as Vice President of Finance for MiaSole, a thin film solar technology company, from June 2013 to February 2017. Ms. Wallach has also previously served as Chief Financial Officer of UBM Tech, a wholly owned subsidiary of UBM LLC, and Vice President of Finance at Juniper Networks, Inc., and has held different financial management positions with Intuit. Prior to Intuit, Ms. Wallach served as Chief Financial Officer of General Electric’s (GE) Industrial Systems, Drives & Controls division. Ms. Wallach holds a B.A. degree in Economics and Public Policy from the University of California at Berkeley.
Mr. Stepien is President and has served as a director on the Amprius Board since May 2025. He brings more than 35 years of leadership experience in energy storage, advanced manufacturing and technology innovation. Prior to joining Amprius, Tom served as CEO of South 8 Technologies, where he led the commercialization of liquefied gas electrolytes for lithium-ion batteries. Previously, he was an Operating Partner at KCK Group, a private equity firm focused on industrial technologies; co-founded and led Primus Power, a long-duration stationary energy storage company; and spent over a decade at Applied Materials, where he held roles of increasing responsibility in software, operations and general management. Tom earned bachelor’s and master’s degrees in mechanical engineering from MIT. He is an Independent Director of Euro Manganese (TSX-V and ASX: EMN), where he chairs the Sustainability Committee and is a member of the Technology Committee. He attended Stanford Law School's Directors College, an executive program on board responsibilities, corporate governance and legal frameworks. Tom is passionate about teamwork, customer success and lifelong learning.
Dr. Stefan has served as Amprius’ Chief Technology Officer since August 2015. Dr. Stefan is a recognized expert in electrochemistry and energy storage and leads Amprius’ scientific research and development activities for advancing lithium ion cell performance. Dr. Stefan has also served as a Senior Scientist at Amprius, Inc. since November 2009 and as Director of Battery Technology since November 2012. Prior to joining Amprius, Inc., Dr. Stefan was a Scientist Electrochemist at Nanosys Inc. Dr. Stefan holds a Ph.D. in Chemistry from Case Western Reserve University, a M.S. degree in Electrochemistry and Analytical Chemistry from Babes-Bolyai University, and a B.S. degree in Chemistry from Babes-Bolyai University.
Dr. Weijie Wang, a pioneer in silicon nanowire anode technology, has played a pivotal role in advancing the capabilities of high-energy density lithium-ion batteries. Dr. Wang leads the fundamental research and scaling efforts that drive the company’s innovation in energy storage. With extensive experience in research and development in the semiconductor industry, Dr. Wang brings a deep understanding of condensed matter physics and its application to next-generation battery technologies.
Mr. Bakke oversees Amprius’ domestic manufacturing and operational strategy. He brings deep expertise in quality systems and manufacturing, with extensive experience across the automotive and aerospace sectors. Known for driving operational excellence, he has led successful initiatives in lean manufacturing, ERP deployment, supply chain optimization, and quality assurance, contributing to globally recognized performance benchmarks.
Mr. Tao is an industry veteran with buyer and supply-side experience along with key strategic development and sales roles. He successfully led market penetration efforts that span Fortune 500 to mid-size and small companies. Mr. Tao has a wealth of experience in many market verticals including mobility, robotics, and consumer electronics.
Mr. Huie has served as Amprius’ Vice President of Infrastructure since September 2022, leading the Company’s high-volume manufacturing initiative as it begins to scale its production capacity. He focuses on factory planning, facility development, and regulatory compliance. Prior to joining Amprius, Mr. Huie served as the Director of Facilities for Panasonic Energy of North America at Tesla’s first Gigafactory in Sparks, NV. He was instrumental in the site selection and development plans of Panasonic Energy’s Gigafactory in De Soto, Kansas aiming to advance the EV industry in the US. Previously Mr. Huie has held different senior management positions for expansions of critical infrastructures at The Jackson Laboratory, Xyratex International, Jacobs Engineering Group, Optisolar, and NEC Electronics America. Mr. Huie is a Certified Facility Manager and holds a B.S. degree in Mechanical Engineering from CSU, Chico.
Ms. Jiang brings more than a decade of experience in the legal industry to Amprius. For seven years, she was an associate at Wilson Sonsini Goodrich and Rosati, counseling both public and private companies on corporate and transactional legal proceedings. Prior to that, she was an associate at Davis Polk and Wardell, serving as counsel for various public offerings and capital markets deals. She received her J.D. from the University of Michigan Law School, graduating cum laude.
Our company culture fosters innovation through teamwork. We’re agile and proactive in adapting to market changes. Our customer-first approach aligns our priorities and resources, promoting collaboration within our organization and with our partners.
We embrace curiosity and strive for excellence to lead meaningful change.
We’re motivated to accelerate purposeful progress every day.
Integrity fuels every decision, action, and relationship.
We’re driven by ideas that inspire and power our mission.
Through internal and external collaborations, we energize the future.
Collaboration and trust are core to our culture, driving our success.
