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Management Team

Thomas M. Zarrella

President and CEO

Thomas Zarrella was appointed CEO and President of SustainX in July 2010. Prior to joining SustainX, he was President and CEO of GT Solar International. Before joining GT Solar, Zarrella headed Schott Solar AG's manufacturing operations in Billerica, MA, where he was instrumental in transforming the research and development oriented company into a full-scale manufacturer of photovoltaic products. Zarrella previously directed manufacturing and North American Operations for Instron Corporation. He also held corporate positions at several companies, including Revere Corporation, Sprague Meter (Textron, Inc.), and Sikorsky Aircraft (United Technologies). Zarrella also holds a bachelor of science degree in mechanical engineering from the University of Connecticut and master's degree in business administration from the University of Bridgeport.


David Beatty

Vice President, Engineering

David Beatty joined SustainX as VP of Engineering in March, 2011. Prior to joining SustainX, he was VP of Engineering at IdaTech, a manufacturer of reformer-based PEM fuel-cell systems for the Telecom backup power market. There his primary product challenge was the development of a commercially viable product, starting from an early prototype. He implemented a structured product development process to drive improvements in component and subsystem manufacturability and reliability, while reducing the cost of a reformer-based 5 kW fuel-cell system by 50%. Prior to this, he was VP of Engineering at Active Power, where he developed an 85 kW thermal and compressed air energy storage system, from concept to production release. His previous experience includes the development of variable-nozzle turbochargers and hydraulic fuel injection systems at Honeywell and Caterpillar, and commercial nuclear plant cooling system analyses at Babcock and Wilcox. Mr. Beatty holds BSME and MSME degrees from the University of Illinois at Urbana-Champaign, and holds nine U.S. patents.


Richard Brody

Vice President, Business Development

Richard Brody, Ph.D., joined SustainX as VP of Business Development in January, 2012. Prior to joining SustainX, he was Vice President Business Development at PowerGenix, where he was responsible for market and product strategy, as well as key relationships, for the automotive, stationary storage, and industrial battery markets. Richard has over two decades of experience in technology-based international business development and government policy. Prior to PowerGenix, he held senior positions in United Technologies Corporation (UTC), including Vice President International Business Development at UTC Power, where he established the company’s clean and renewable power generation business in Asia and Europe. Prior to that, Richard was President of UTC’s corporate office in Moscow and chairman of the board of the American Chamber of Commerce in Russia. Before joining UTC, he served in the White House as Russia foreign policy advisor to Vice President Al Gore and held positions related to international technology policy at the Department of Commerce and the Congressional Office of Technology Assessment. Richard holds a Ph.D. and Master's degree from the University of Michigan and a bachelor's degree from Columia University.


Dax Kepshire

Vice President and General Manager

As SustainX’s Vice President and General Manager, Dax Kepshire, Ph.D. is responsible for managing the company’s day-to-day operations and is an active participant in developing the company's strategic direction. In 2007, while pursuing a doctorate at Dartmouth’s Thayer School of Engineering, he co-founded SustainX and served as its President until 2010. During that time Dr. Kepshire secured a total of $11M in Series A and non-dilutive funding, assembled the core engineering team, forged relationships with strategic partners, and positioned the company as a world leader in compressed air energy storage. Prior to founding SustainX, his primary focus at Thayer was on medical device engineering; most notably the development of technologies for image guided neurosurgery and small-animal molecular imaging. Dr. Kepshire holds an M.S. and Ph.D from the Thayer School of Engineering, he is the lead author of six peer-reviewed scientific publications, and is named as an inventor on two published US patent applications.


David Neafus

Chief Financial Officer

David Neafus, CPA, Chief Financial Officer, came to SustainX with 14 years experience providing executive services, specializing in interim executive management, IPOs, turnarounds, strategic analysis, and mergers and acquisitions. As CFO of GlycoFi he presided over the company’s $400M acquisition by Merck; as VP of Finance at Alnylam Pharmaceuticals, he led the company to a successful IPO. His experience also includes a period as Chief Financial Officer of Infinity Pharmaceuticals.