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  • Executive Team

    John Carrington

    As CEO and Director, John Carrington leads the energy storage and analytics movement at Stem. With more than 25 years of leadership experience at technology, energy and industrial companies, John comes to Stem from MiaSole, the world’s largest CIGS-based thin film solar company, where he was CEO 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 $250 million to more than $2 billion, and opened markets in the U.S., 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, 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, where he earned his bachelor's degree in marketing and economics.

    Larsh Johnson

    As Chief Technology Officer, Larsh Johnson leads hardware and software engineering to meet the unique 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 Department of Energy’s Gridwise Architecture Council (GWAC) and remains a member emeritus. He earned his B.S. and an M.S. in mechanical engineering from Stanford University.

    Mark Triplett

    Mark Triplett serves as Stem’s Chief Operating Officer, responsible for energy storage system deployments, supply chain, network operations, and utility programs. He also ensures effective deployment and usage of Stem’s energy storage systems and cutting-edge AI, AthenaTM. Mark brings more than 20 years of experience developing, selling and delivering complex technology solutions in energy storage, smart grid, renewable energy, DERS, utility operations, telecommunications, and enterprise software. Mark was most recently COO of Green Charge Networks, and earlier served as president of software and COO at UISOL, an Alstom-owned DRMS enterprise software application product exclusively for the utility industry. Mark has a B.S. in engineering from the United States Military Academy at West Point and an MBA from National University.

    Alan Russo

    Alan Russo serves as Chief Revenue Officer at Stem, leading the expansion of Stem’s markets in the U.S., Canada, Europe and Asia. Before joining Stem in 2018, he led sales and marketing for REC Solar, a wholly owned subsidiary of Duke Energy. Previously, Alan was Vice President of Strategic Accounts for Bloom Energy. During his 10-year tenure, he led the development and deployment of hundreds of fuel cell systems at critical facilities around the U.S. Earlier in his career, Alan also led Asia commercial operations for American Power Conversion, a Schneider Electric company, managing over 350 employees. Alan earned his B.S. in aerospace engineering from Boston University.

    Polly Shaw

    Polly Shaw has served as Stem’s Vice President of Regulatory Affairs and Communications since 2016. She has 25 years of clean energy and energy efficiency policy experience in the U.S. and China. Formerly Vice President 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 percent renewable portfolio standards, favorable net metering rules and other market-creating 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 Initiative. 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 has served on the board of the California Energy Storage Alliance, Solar Energy Industries Association, and the Large Scale Solar Association. Polly holds a B.A. from Tufts University, a Certificate in Chinese Law from the University of London, and speaks English, French, Chinese, and basic Spanish.

    David Gelinas

    As Vice President of Finance and Business Operations, David Gelinas is responsible for corporate finance, project finance and strategic initiatives. David has experience across a range of sustainable infrastructure technologies, having advised on over $1 billion of transactions as an investment banker at Greentech Capital Advisors and J.P. Morgan. David graduated with a B.A. from Cornell University with concentrations in economics and government.

    Julie Steury

    As Vice President of Programs and Customer Success, Julie Steury leads the execution of Stem’s grid service and utility programs and customer success organizations, driving Stem’s efforts to improve grid reliance and sustainability. Her program teams coordinate sales, installations, product development, and operations. The customer success teams are focused on improving Stem’s customer experience and supporting back office operations. Prior to joining Stem, Julie was Senior Director of R&D at Itron, where she led global software teams developing meter data collection and meter data management along with customer and grid analytics applications. She joined Itron via the acquisition of Silicon Energy, a bay area software pioneer in web-based enterprise energy management, where she led applications of an unbundled tariff engine and national rates content service. Julie earned a B.S. and an M.S. in operation research/mathematical sciences from Stanford.

    Patti Lusk

    Patti Lusk is the Vice President of Human Resources at Stem, responsible for all aspects of the human resource function, and serves as company liaison to the compensation committee of the board of directors. She also works with Stem’s outside partners with real estate, insurance/risk management, and environmental health and safety. Prior to joining Stem in 2015, Patti was Senior Vice President of Human Resources at Aurora Algae (acquired by Reliance Energy) where she was responsible for global human resources. Patti began her career at Nordstrom, serving as a human resource manager for more than ten years, and has held HR roles at NACCO Materials Handling Group, and the top HR role at Associated Chemist, NACCO Materials Handling Group, MathStar, Northwest Pump and Equipment and Energy Recovery Inc. Patti earned her B.S. in communications at Oregon State University and maintains certification as a Senior Professional in Human Resources (SPHR) through the Human Resource Certification Institute.

    Gabe Schwartz

    As Vice President of Product Marketing and Sales Operations, Gabe Schwartz leads strategic positioning, go-to-market, and sales enablement activities in order to drive adoption of Stem’s solution by leading businesses, institutions and utilities. Before joining Stem in 2014, he spent three years at EnerNOC managing marketing strategy and execution for their demand response and energy intelligence software businesses. Prior to EnerNOC, Gabe supported partnership development at electric vehicle innovator Better Place and implemented several strategic and operational improvement initiatives as a management consultant for Bank of America. Gabe earned his MBA from the Haas School of Business at UC Berkeley and his B.S. in economics from the University of California, San Diego.

    David Erhart

    As Vice President of Hardware Engineering, David Erhart manages Stem’s hardware and power electronics systems architecture, key aspects of Stem’s industry-leading energy storage technology. Prior to joining Stem, David was Chief Technology Officer 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. In addition to his role at Stem, David currently serves as a board director of the MESA Standards Alliance and leads the SunSpec Alliance Inverter Working Group. David graduated from the University of South Alabama with a B.S. in electrical engineering.

    Tad Glauthier

    As Vice President of Hawaii Operations, Tad Glauthier is responsible for executing 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 B.A. in English from Stanford University and received his MBA from Stanford’s Graduate School of Business.

    Randy Palombi

    As Vice President of Sales, Randy Palombi leads Stem’s direct and channel partner sales teams, expanding Stem’s customer base. 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 B.S. in mechanical engineering and earned his MBA from Pepperdine University.

    Prakesh Patel

    As Vice President of Capital Markets and Strategy, Prakesh Patel leads Stem’s financial strategy and supports corporate fundraising initiatives, and has helped secured more than $200 million in financing for Stem. Prakesh has spent his career financing technology and energy ventures at the cross section of multiple 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 B.A. from UC Berkeley and an MBA from Yale University.

    Andrzej Skoskiewicz

    As Vice President of Product Engineering, Andrzej Skoskiewicz is responsible for defining and executing Stem’s technical product and manufacturing. Previously, Andrzej served as Director of Module Engineering at GreenVolts, where he oversaw the design and commercialization of high concentration photovoltaic modules (HCPV). Earlier, 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 B.S. and M.S. in mechanical engineering from MIT.

    Board of Directors

    Jorge A. Acevedo

    Jorge Acevedo is senior vice president, Generation Innovation and Strategy, for Exelon’s commercial subsidiary Constellation. He is responsible for Constellation’s strategic direction and overall innovation strategy. Additionally, he leads Constellation Technology Ventures, Exelon’s venture investing arm and has led investments in XL Hybrids, Ouster and Precision Hawk. He also oversees market development and strategic transactions. Previously, he was Senior Vice President, Retail Strategy, overseeing retail pricing, analytics, sales strategy and acquisitions, sales operations, and dedicated support for Constellation’s power and gas business. Prior to that, he led financial planning and analysis for Constellation’s wholesale trading and retail business segments. Acevedo earned his bachelor’s and master’s degrees in accounting from the University of South Florida.

    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 has been starting, building and investing in “impact” businesses for the last 27 years with an emphasis on renewable energy generation, energy storage/grid services, wastewater treatment and e-commerce. Together these activities have created over $3.5 billion of shareholder value. He currently sits on the Board of Cambrian Innovation, Leading Edge Crystal Technologies, Paragon Power and Stem, as well as being a member of the Investment Committee at the PRIME Coalition. He has in the past been a founding investor and director of SunRun (NASD:RUN), SunEdison (NYSE: SUNE), Valueclick (NASD:VCLK), Brilliant Light Power, Bright Plain Renewable Energy, Prevalent Power, Resource Holdings and Best Internet. David has an MBA from the Harvard Business School and a BA from Middlebury College.

    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.

    Anup Jacob

    Anup Jacob is a co-Founder and Managing Director of Activate Capital and has been investing over 19 years in energy, water and industrial technology businesses. Anup has served on multiple private and public company boards and chaired audit and compensation committees. Previously he was Managing Partner, Masdar Capital, (green investment arm of Abu Dhabi government); Associate Director, Mubadala Capital; Co-founder and Partner, Virgin Green Fund; Partner, Aqua International (a TPG fund). Anup holds a BA with honors in Economics from the University of Chicago.

    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.

    Olivia Steedman

    Ms. Steedman is a Managing Director within the Infrastructure and Natural Resources (INR) Group at Ontario Teachers’ Pension Plan (OTPP). INR manages a C$25b global portfolio of direct equity investments in both greenfield and brownfield infrastructure assets and natural resources businesses. Before joining OTPP, Ms. Steedman was an Assistant Vice-President in the project finance and privatization group at PricewaterhouseCoopers. She also practiced civil engineering at Marshall Macklin Monaghan. A Professional Engineer and Chartered Professional Accountant, Olivia earned a B.Sc. in Civil Engineering from Queen’s University and has an ICD.D certification from the Institute of Corporate Directors.


    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.