Dr. Kang Sun

Dr. Kang Sun

Chief Executive Officer & Board Director

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 Amprius (Nanjing) Co. Ltd. since 2017 and Amprius (Wuxi) Co. Ltd. since November 2014, both entities of which were spun off from Amprius 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 has 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.

Sandra Wallach

Sandra Wallach

Chief Financial Officer

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.

Jon Bornstein

Jon Bornstein

Chief Operating Officer

Mr. Bornstein has served as Amprius’ Chief Operating Officer since February 2015. Mr. Bornstein has also served as Amprius, Inc.’s Senior Director of Engineering since March 2013. Prior to joining Amprius, Inc., Mr. Bornstein served as Senior Director of Technology Development and Integration at Ampulse Corporation, where he led the development of a photovoltaic cell on flexible metal foil substrate. Mr. Bornstein has also previously served as a 260 Manager of Process Integration and Development at Intel Corporation and Director of Engineering Operations at Brion Technologies. Mr. Bornstein holds a M.S. degree in Materials Science from Stanford University and a B.S. degree in Chemistry from Antioch College.

Dr. Ionel Stefan

Dr. Ionel Stefan

Chief Technology Officer

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

Dr. Weijie Wang

Amprius Technologies Fellow

Dr. Wang pioneered the design and fabrication of the silicon nanowire anode.  He is responsible for nanowire development and manufacturing.

Aaron Bakke

Aaron Bakke

Senior Director of Manufacturing

Aaron has deep expertise in quality and manufacturing, with broad experience in the automotive and aerospace industries. He has a record of success in lean manufacturing, ERP implementation, quality assurance, and supply chain management. His dedication to excellence has resulted in globally recognized accomplishments in quality assurance.

Ronnie Tao

Ronnie Tao

Vice President of Business Development

Ronnie is an industry veteran with buyer and supply-side experience along with key strategic development and sale roles.  He successfully led market penetration efforts that span Fortune 500 to mid-size and small companies.  Ronnie has a wealth of experience in many market verticals including mobility, robotics, and consumer electronics.

Andrew Huie

Andrew Huie

Vice President of Infrastructure

Mr. Huie has served as Amprius’ Vice President of Infrastructure since September 2022, leading our high-volume manufacturing initiative as the company 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.