Meet the Team

We are a team of entrepreneurs, coders, finance experts and thought leaders, working toward a world filled with 100% clean energy for all. But our true measure of impact is reflected in the number of people prospering in the clean energy economy. We’re excited to build that world with you.

Billy Parish

Founder & CEO

A mission-driven entrepreneur, Billy has founded, invested in and advised many clean energy companies and organizations over the last 20 years. He was honored as one of Rolling Stone's 25 People Shaping the Future.

Patrick Moore

President & Chief Operating Officer

For the last 20 years, Patrick has grown and managed industry-leading consumer lending businesses, including Capital One and Toyota Financial Services. In each of his three prior COO positions, he launched and scaled successful point of purchase financing businesses, most recently in the home improvement channel.

Steve Controulis

Chief Financial Officer

Prior to joining Mosaic, Steve served as CFO for over a decade at Triton Container International Limited, the world’s largest container leasing company, and held various leadership positions within Triton for a total of eighteen years. Steve has also held leadership roles at GE Capital, Heller Financial and The First National Bank of Chicago.

Heather Houston

Vice President of People

Heather has extensive HR leadership experience in small, high growth companies. She has brought her HR expertise for more than 15 years to several leadership positions across a diverse set of organizations, including Five9, NanoGram, Zyomyx and Synplicity.

Nagaraju Bandaru

Chief Technology Officer

Nagaraju is a technology and product executive with over 20 years of experience in innovation, architecture, product delivery, and operations. He is an entrepreneurial technology leader and most recently led growth and transformation of market leading products at Intuit and Clarivate Analytics (formerly part of Thomson Reuters). He has delivered successful outcomes for startups, private equity, and large public companies by creating technology vision, strategy, and roadmaps.

Anitha Srinivasan

Vice President of Business Operations

Specializing in Business Operations, Anitha has over 14 years of experience in Enterprise Program and Process execution. She has extensive experience with execution leadership at fast-growing consumer lending businesses, holding prominent roles at Affirm, Capital One and Westlake Financial Services.

Wendy Zorick

Vice President of Risk

Wendy has deep experience executing transactions and partnering with investors in structured finance and consumer loans. Combining financial expertise with the risk and analytics background she built in student lending at Navient and Sallie Mae, she has facilitated more than $40 billion in funding activity through all parts of the credit cycle.

Lakshman Venkatesan

Vice President of Finance

With over 18 years’ experience, Lakshman brings a depth of expertise in financial planning, project finance, portfolio management and mergers and acquisitions. Prior to Mosaic, Lakshman worked at Spruce Finance, KPMG, Citibank and Pricewaterhouse Coopers.

Erin Talbot

Vice President & General Manager of Solar

Erin is responsible for solar strategy, pricing, messaging, value proposition, customer focus, product development, marketing, sales and partner integrations. Prior to joining Mosaic, Erin held roles as the Enterprise Chief Credit Officer for E*TRADE, Head of Enterprise Data Management for E*TRADE, and SVP, Product Manager for LightStream at SunTrust.

Dhanur Grandhi

Vice President of Product

Susan Comstock


Susan specializes in providing finance, accounting and operations expertise to high growth fintech, banking, asset management, broker/dealer, and technology focused businesses. Her career has been focused on creating and implementing accounting and general ledger processes, performing strategic risk and control assessments and developing GAAP and regulatory accounting policies to dealing with tactical issues like cash flow, bank to platform cash reconciliations, enterprise risk, balance sheet improvement, financial reporting, budgeting and forecasting, ERP systems and investor relations.

Alex Kaplan

Senior Director of Capital Markets

Alex leads Mosaic’s capital markets initiatives, including the development and management of revolving warehouse facilities, loan sale and direct origination partnerships, and Mosaic’s asset-backed securitization program. Prior to Mosaic, Alex held a leadership role in the structured finance and strategy group at SolarCity where he worked on tax equity, back-leverage, and ABS transactions, including the first-ever securitization of residential solar assets.

Board of Directors

Daniel Rosen

Founder & Chairman

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

Billy Parish


A mission-driven entrepreneur, Billy has founded, invested in and advised many clean energy companies and organizations over the last 20 years. He was honored as one of Rolling Stone's 25 People Shaping the Future.

Arjun Thimmaya


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.

Steven Kantowitz


Steven joined Warburg Pincus in 2012 and focuses on energy investments. Previously, he worked in the firm’s Energy group from 2012-2014 and in the energy investment banking group at Credit Suisse from 2010-2012.

Christopher Halmy


Joined Ally Financial in 2009 and served as its CFO from 2013 to 2018 leading the company through its financial restructuring to becoming a public company. Prior to Ally, he worked for Bank of America, MBNA, JP Morgan and Merrill Lynch in a variety of finance and treasury roles.