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  • Executive Team

    John Carrington

    John Carrington, CEO and Director, he has a distinguished track record with over 25 years of proven leadership in technology, energy and industrial companies. John comes to Stem from thin film solar company MiaSole, the world’s largest CIGS-based thin film solar company globally where he was Chief Executive Officer and Director. Prior to MiaSole, John was Executive Vice President of Marketing and Business Development at First Solar where he grew the company revenue from $300 million to over $2 billion, opening markets in the US, Asia and Europe. John spent over 16 years at General Electric, most recently as General Manager and Chief Marketing Officer of the $7 billion GE Plastics global organization where he led global innovation, new technology efforts and product strategy. John was part of a small executive team that executed on the $12 billion sale of GE Plastics to SABIC in 2007. He is an alumnus of the University of Colorado.

    Karen Butterfield

    As Chief Commercial Officer, Karen is responsible for building and leading Stem’s commercial enterprise, including: strategy, policy, sales, marketing and product management. Her team at Stem has successfully deployed a large fleet of customer-sited storage with software and analytics that serve both commercial customers at the site and electric utilities and wholesale markets. Prior to joining Stem, she was a Managing Director in the commercial systems group at SunPower. Her teams successfully deployed large PV systems on DOD, DOE and VA facilities throughout the United States. Additionally, Karen led the key account efforts at SunPower with responsibility for Apple, Verizon, Macy’s and other Fortune 500 customers. Karen has consulted in utility-scale energy programs and spent 10 years at Honeywell Grid Solutions designing and delivering energy efficiency, demand response and smart metering programs. She currently serves as Treasurer on the board of directors of the Energy Storage Association ESA and holds a board seat on the SmartElectric Power Alliance (SEPA). Karen graduated from Bowdoin College with a BA in economics.

    Larsh Johnson

    As Chief Technology Officer, Larsh is leading hardware and software engineering to meet the needs of Stem's C&I, utility, and energy market customers. Prior to joining Stem, Larsh was Chief Technology Officer at Siemens Digital Grid, where he led technology development teams on products spanning from consumer metering, demand response and analytics to control center software and grid automation. He joined Siemens via the acquisition of eMeter, a Bay Area software company of which he was a co-founder and responsible for innovation and development of meter data management, analytics, and advanced smart grid applications. Prior to eMeter, he co-founded CellNet Data Systems, a pioneer in wireless networks for smart metering and distribution automation and now a unit of Landis+Gyr a Toshiba company. Larsh was a founding member of the DOE’s Gridwise Architecture Council (GWAC) and remains a Member Emeritus. He earned a B.S. and an M.S. in Mechanical Engineering from Stanford University.

    Bill Bush

    As Stem’s Chief Financial Officer, Bill manages the company’s corporate and project financing efforts. Bill was formerly CFO of Borrego Solar Systems Inc. for seven years where he helped the company achieve 10 times growth and profitability. He was previously CFO of Solar Semiconductor Inc., a leading private, vertically integrated manufacturer and distributor of high-quality PV modules and systems with operations in India. Bill has served as CFO and corporate controller for a numerous high growth solar, software and online media companies, and was a founder of Buzzsaw.com, a spinoff of Autodesk. Prior to his work with Buzzsaw.com, Bill served as corporate controller for Autodesk, Inc. His prior experience includes seven years in public accounting with Ernst & Young, and Price Waterhouse. Bill holds a BS in Business Administration from U.C. Berkeley and is a Certified Public Accountant.

    Polly Shaw

    As VP of Regulatory Affairs and Communications, Polly is responsible for expanding and leading Stem’s regulatory affairs and communications efforts. She has 24 years of clean, efficient energy policy experience in the U.S. and China. Formerly VP of External Affairs at SunEdison, she managed a team that helped win a range of supportive policies, including long-term extensions of the federal Investment Tax Credit, two 50% renewable portfolio standards, favorable net metering rules, and other policies. Previously, she was Senior Director of External Relations at Suntech America, and earlier Senior Regulatory Analyst at the California Public Utilities Commission where she managed the $2.2 billion California Solar Incentive program. Polly earlier served as a Program Officer at the Energy Foundation, and provided consulting support for EPA greenhouse gas programs while at ICF. She is on the board of the Interstate Renewable Energy Council and California Energy Storage Alliance, and has served on the board of the Solar Energy Industries Association and the Large-scale Solar Association. Polly holds a BA from Tufts University, a Certificate in Chinese Law from the University of London, and speaks English, French, Chinese and basic Spanish.

    Mike Lindheim

    As Stem’s VP of Operations, Mike is responsible for overseeing Stem’s field deployment, manufacturing and supply chain. With over 30 years of leadership in the design and deployment of global infrastructure, Mike has excelled in identifying strategic growth areas, leading corporate expansion, and driving improved profitability. During his ownership and management at Schwartz-Lindheim Inc., a major California based electrical engineering and construction company, he led a team of 350 employees.

    David Erhart

    As VP of Engineering, David Erhart is responsible for Stem’s hardware and power electronics systems architecture. Prior to joining Stem, David was CTO at Quicknet Technologies, Inc., where he led an engineering team that created VoIP hardware, software and call processing systems. Previously, David was a lead software engineer at Altos Engineering Applications, where he developed maintenance applications for nuclear power plants. David graduated from the University of South Alabama with a BS in Electrical Engineering.

    Tad Glauthier

    As VP of Hawaii Operations, Tad is responsible for executing on Stem’s customer and utility-facing market development activities in Hawaii including Business Development, Marketing, Regulatory Affairs and Utility Relations. Prior to joining Stem, Tad worked at the Boston Consulting Group, where he specialized in growth strategies for Fortune 500 Companies. Tad graduated Phi Beta Kappa with a BA in English from Stanford University and received his MBA from Stanford's Graduate School of Business.

    Randy Palombi

    As VP of Sales, Randy is responsible for building and leading Stem’s direct and channel partner sales teams. Randy has over 25 years of experience in the energy industry, spanning: sales, marketing, business development and operations. Prior to joining Stem, he was a Vice President in Constellation’s Load Response organization, where he oversaw the sales and delivery of innovative energy management solutions for end-use customers, as well as utilities. Previously, Randy served in sales leadership positions at CPower, APX, and Sempra Utilities and led management consulting practices for PwC Consulting and eLoyalty. Randy graduated from California State Polytechnic University with a BS in Mechanical Engineering and earned his MBA from Pepperdine University.

    Prakesh Patel

    As VP of Capital Markets and Strategy, Prakesh leads Stem’s financing strategy and supports corporate fundraising initiatives. Prakesh has spent his career financing technology and energy ventures across a broad cross section of industries. He joins Stem from Angeleno Group, an energy and natural resources-focused private equity firm, where he helped to lead their investment in Stem. Previously, Prakesh built and managed a portfolio of private equity investments at Nova Capital and Deutsche Bank. His prior work also includes closing over $500 million of project finance at the International Finance Corporation (The World Bank Group). Prakesh has a BA from the University of California, Berkeley and an MBA from Yale University.

    Andrzej Skoskiewicz

    As VP of Product Engineering, Andrzej is responsible for defining Stem’s technical product and for manufacturing. Previously, Andrzej served as director of module engineering at GreenVolts, where he oversaw the design and commercialization of High Concentration Photovoltaic Modules (HCPV). Previously, Andrzej was director of product development at Nanosolar and worked as a project manager at IDEO, where he developed medical, automotive, and consumer electronics products. Andrzej holds a BS and MS in Mechanical Engineering from MIT.

    Board of Directors

    Zeb Rice

    Zeb Rice is co-founder and a managing partner of Angeleno Group, where he oversees investments in the areas of energy storage, renewables, carbon management, and lighting. Prior to this, he managed venture investing for News Ltd., a division of News Corporation. His portfolio included seed-through-expansion stage investments in high growth technology companies. Zeb received a BS Magna Cum Laude in Government and Economics from Bowdoin College.

    David Buzby

    David Buzby is the former Chairman and CEO of SunEdison, a leading solar services company in the US and Europe. David is a director of SunRun, the top US residential solar financing company. He has held board and senior management roles at a variety of cleantech companies. David earned a BA from Middlebury College and an MBA from Harvard University.

    Catherine Wainwright

    Catherine is Chief Operating Officer of RWE Supply & Trading’s Principal Investments fund. RWEST Principal Investments runs a broad based portfolio of asset and equity investments across the commodity trading spectrum. Catherine has 30 years’ experience in commodity trading and related asset, M&A and Principal Investment activities. She has led a number of major commercial transactions and acquisitions for RWE and was previously head of UK Structured Origination for RWE Supply & Trading. Catherine led RWEST's successful acquisition, biomass project development and the eventual sale of Lynemouth Power Station, including the award and EU state aid approval for a UK government contract. She acted as Chair of the Board of Directors of Lynemouth Power Limited for 3 years. Catherine holds a degree in Theoretical Physics from Durham University and a Masters in Business Administration from Birmingham University.

    Go Mizoguchi

    Go Mizoguchi is a General Manager at Mitsui & Co. (USA) where he oversees the firm’s infrastructure businesses in the Americas. He has extensive experience in the origination, development and acquisition of energy projects worldwide, including the acquisition of a 680 megawatt (MW) Canadian renewable energy portfolio--with the arrangement of approximately $800 million in project financing—and an investment in Astoria Energy LLC’s 75 MW gas-fired power plant in the Queens borough of New York City. Go holds a Master’s degree in Electrical Engineering from the University of Tokyo and an MBA from the Massachusetts Institute of Technology.

    Paul Leggett

    Paul Leggett is a Managing Director and member of the investment team at Mithril Capital Management, where he holds board roles with portfolio companies in sectors ranging from robotics to enterprise SaaS, energy and space services. He is also an appointee to the U.S. Department of Energy’s Hydrogen and Fuel Cell Technical Advisory Committee (HTAC). Prior to Mithril, Paul helped lead Morgan Stanley’s Clean Technology investment banking team and was a member of the firm’s Environmental Committee. Previously, he held roles in the firm's Global Mergers & Acquisitions and Global Sustainable Finance teams. Paul received a BA in Political Economy from Tulane University and a MBA from the Darden School of Business at the University of Virginia.

    Michael Smith

    Michael Smith leads Constellation Technology Ventures (CTV), the venture capital investing arm of Exelon Corp., where he oversees CTV’s portfolio of investments in the energy technology space. Mike has worked in various legal, regulatory and commercial roles in the US and European energy sectors and has a strong background in the strategic development and implementation of renewable and sustainable energy product offerings. Mike earned a Bachelor of Arts degree from the University of Miami and a JD from the Duke University School of Law.

    Advisors

    Michael W. Allman

    Mike Allman is an accomplished CEO and Chairman with a highly successful career growing, restructuring, and optimizing business strategy and operations in both the corporate world and with a top-tier global consulting firm. Since 1998, Mike has held a number of leadership positions with Sempra Energy, a $33 billion Fortune 300 energy services holding company in San Diego, CA. His most recent position was Chairman, President and CEO of Southern California Gas Company, the $4 billion, largest natural gas distribution company in the United States. Previously Mike was President and CEO of Sempra Generation, a $2 billion electric generation business. Earlier, Mike had an 11 year career at The LEK/Alcar Consulting Group, holding Partner-level business development and consulting roles in the U.S., Europe, and South Africa. Mike received an MBA with Finance specialization from The University of Chicago Booth School of Business, and a B.S. in Chemical Engineering from Michigan State University.

    T. J. Glauthier

    T. J. Glauthier has had a distinguished career in areas related to energy and the environment. He served as Deputy Secretary of the U.S. Department of Energy. He spent over twenty years in management consulting. He was President and CEO of the Electricity Innovation Institute, an affiliate of EPRI. He is currently a director at Union Drilling, Inc., EnerNOC, and two private companies. He serves on advisory boards for Solazyme, Babcock & Wilcox, Stanford, the Lawrence Berkeley Lab, and the National Academy of Sciences. Mr. Glauthier holds an AB in Mathematics from Claremont McKenna College and an MBA from Harvard Business School.

    Jim Detmers

    Jim Detmers is the former Vice President, Operations of the California Independent System Operator Corporation (CAISO), where he was responsible for the reliable and compliant operation of the transmission system that delivered electricity to over 30 million Californians. Jim was employed at CAISO for 13 years, leading the organization through start-up and establishment of wholesale power markets. Before joining CAISO, Mr. Detmers worked for Pacific Gas and Electric in leadership roles within the Electric Transmission and Distribution Operations divisions. He has also worked for the Modesto Irrigation District and Westinghouse Electric Corporation. Mr. Detmers received his Bachelor of Science in Electrical Engineering from the California Polytechnic State University, San Luis Obispo in 1986. Mr. Detmers is a former board member of the Western Electricity Coordinating Council and Western Systems Coordinating Council.

    Dennis R. Capozza

    Dennis R. Capozza is a founding principal of University Financial Associates LLC and is the Dykema Professor of Business Administration in the Ross School of Business at the University of Michigan. Dr. Capozza earned a B.A. degree from the University of Pennsylvania and a Ph.D. (Economics) from Johns Hopkins University. He has also served on the faculties at the Massachusetts Institute of Technology, the University of British Columbia and the University of Southern California. Dr. Capozza pioneered the use of forecasting to optimize grid level energy consumption in individual and aggregated loads.