Meet the Team

Accelerating the world
to 100% clean energy

    We are a team of entrepreneurs, coders, finance experts and changemakers. We want to create a world that is powered by abundant clean energy and owned by people like me and you. We’re excited to build that world with you.

    Mosaic Executive Team

  • Billy Parish

    Billy Parish

    Founder/Chief Executive Officer

    Founded and grew the Energy Action Coalition into the world’s largest youth clean energy organization (300k members).

  • Dan Rosen

    Dan Rosen


    Clean energy entrepreneur working in Israel and rural native communities in the Southwest. Recognized twice by Forbes as “30 under-30” for energy.

  • Mike McDermitt

    Mike McDermitt

    Chief Credit Officer

    Led the commercial & esoteric asset backed ratings team at Moody's Investors Service. Investment banker with Smith Barney (Citigroup predecessor).

  • Katya Baron

    Katya Baron

    Managing Director, Capital Markets

    Securitization and asset finance specialist with 15+ years of financial services experience. Investment banker and structurer at Sterne Agee, Barclays Capital and JPMorgan Securities.

  • Tony Bako

    Tony Bako

    Chief Operations Officer

    Former VP of Engineering at Cramster (acquired by Chegg), and VP of Engineering at Chegg.

  • Bruce Ledesma

    Bruce Ledesma

    EVP Corporate Development

    Former EVP/General Counsel at publicly traded global solar company (SunPower Corp, sold to Total S.A.) and financial services company (Barra, sold to Morgan Stanley).

  • Steve Controulis

    Steve Controulis

    Chief Financial Officer

    Served as CFO of Triton Container International Limited, the world’s largest container leasing company with $9 billion in assets, for 11 years. He also held leaderships roles at GE Capital, Heller Financial and The First National Bank of Chicago.

  • Shahzad Kazi

    Shahzad Kazi

    Chief Risk Officer

    With over 30 years of experience in risk management, he most recently oversaw over $100B in consumer and small business loans as Head of Consumer Credit at SunTrust Bank. Prior to SunTrust, he was Executive Vice President and Head of Risk Strategy at HSBC for North America and was responsible for identifying high risk segments and overseeing a $400 billion portfolio. He’s also held senior risk and credit roles at ABN-AMRO and Citibank.

  • Ted Fawcett

    Ted Fawcett

    Vice President of Sales

    Led nationwide residential solar sales and strategy for Admirals Bank and senior sales positions at Clean Power Finance and Sungevity.

  • Bobby Tzekin

    Bobby Tzekin

    Vice President of Product

    Over a decade of leadership experience with innovative financial technology companies. Former VP of Product at Lending Club and VP of Product at YapStone. Prior experience with PayPal and Bain & Company.

  • James Robinson

    James Robinson

    Vice President of Marketing

    Former VP of Creative Leadership and Brand Development at SolarCity and has delivered dozens of global campaigns for top brands including Amazon, Paramount Studios, Universal Studios, and Sony.

  • Amir Friedman

    Amir Friedman

    Vice President of Bank Partnerships

    Led bank partnerships at Prosper, over 15 years of financial services and capital markets experience at American Express, Prospect Capital, Bear Stearns, and Chevron.

  • Steve Kent

    Steve Kent

    Vice President of Loan Operations

    A seasoned financial services executive, creating order out of chaos with significant experience in the Renewable Energy sector.

  • Heather Houston

    Heather Houston

    Vice President of People

    Over 15 years of HR leadership experience in small high growth companies including Five9, NanoGram, Zyomyx and Synplicity.

  • Chris Phillips

    Chris Phillips

    Vice President of Home Improvement Lending

    Former VP of Finance and Corporate Development at SoFi. Previously private equity associate at Thomas H. Lee partners and investment banker at J.P. Morgan.

  • Chris Phillips

    Eric Watson

    General Counsel and Secretary

    Previously, Eric served as Deputy General Counsel of Social Finance, Inc. and provided legal support for all capital market activities. Over the 18 years preceding his Mosaic tenure, Eric served at Navient Corporation, has held various positions in the financial services sector, and practiced as a corporate attorney for a major global law firm.

  • Mosaic Board

  • Robert Kelly

    Robert Kelly

    Board Member

    Former CFO of SolarCity, Calera and Calpine. Raised over $51 Billion to finance clean energy projects.

  • Lisa Gansky

    Lisa Gansky

    Board Member

    Co-founder of Ofoto, an angel investor and author of the bestseller, ‘The Mesh: Why the Future of Business is Sharing’.

  • Tom Dinwoodie

    Tom Dinwoodie

    Board Member

    Solar pioneer and founder of PowerLight Corporation, which later merged with SunPower, where he served as CTO.

  • Saurabh N. Agarwal

    Saurabh N. Agarwal

    Board Member

    Joined Warburg Pincus in 2009 and focuses on the energy sector. Previously, he worked at McKinsey & Company in New Jersey and New Delhi, and Temasek Holdings in Mumbai.

  • Arjun Thimmaya

    Arjun Thimmaya

    Board Member

    Joined Warburg Pincus in 2008 and focuses on the financial services sector. Previously, he worked at Trimaran Capital, a New York based private equity fund, where over a six year period, he executed a variety of private equity investments.