Tarbell was respunsible for SolarCity's new product development and deployment. He also serves as Venture Partner at AiiM Partners. He led SolarCity's efforts to bring new money-saving energy technologies and products to customers. Prior to joining SolarCity, he was responsible for product development at MiaSole, a thin-film solar module manufacturer in Silicon Valley. He has also led the sustainable product design offering at IDEO in Palo Alto, and worked at the clean tech venture capital firm Nth Power in San Francisco. He has a BS in mechanical engineering from Cornell University, an MS in mechanical engineering design from Stanford University, and an MBA from Stanford University. He supports GRID Alternatives, a non-profit organization that installs affordable solar energy systems for families in need.