Our Company
Leader in SREC Solar Financing
Sol Systems is a solar energy finance and development firm that was built on the principle that solar energy should be an economically viable energy solution. With thousands of customers and hundreds of partners throughout the United States, Sol Systems is the largest and oldest SREC aggregator. We provide homeowners, businesses, solar installers, and developers with sophisticated financing solutions that help make solar energy more affordable. Sol Systems also helps energy suppliers and utilities manage and meet their solar RPS requirements efficiently by providing them with access to diverse portfolios of SRECs.
Sol Systems Founders

Yuri Horwitz - President & CEO: Yuri Horwitz manages the largest and oldest SREC aggregation firm in the U.S. He founded Sol Systems to make solar energy an affordable option for homeowners and businesses and has succeeded by bridging the gap between traditional energy suppliers and the solar community.
In addition to managing and guiding his firm, Mr. Horwitz has helped to develop and implement solar RPS programs in multiple states. He regularly consults states and Public Utility Commissions on solar markets and SREC programs. Mr. Horwitz has been involved in the energy and environmental policy fields for the last decade. He has assisted clients with the development of wind and solar energy production facilities throughout the United States and has provided pro-bono legal assistance to a number of environmental non-profits, including the Chesapeake Bay Foundation, the Southern Environmental Law Center, and the Surfrider Foundation. Mr. Horwitz also designed one of the nation’s first community-owned solar power purchase agreements.
Mr. Horwitz holds a Juris Doctor from the University of Virginia School of Law and a dual BA from the College of William and Mary in Government and Environmental Studies.

George Ashton - Vice President and CFO: George Ashton co-founded Sol Systems and currently manages the financial and accounting operations. With several years experience in SREC markets, he manages a multi-megawatt SREC portfolio spanning more than 13 states in the Mid-Atlantic, North East, and Mid-West regions. He also leads the Commercial SREC Services group, working closely with developers, installers, and public/private financiers to create financeable solutions to get solar in the ground.
Mr. Ashton came to Sol Systems with more than a decade of investment, trading, and capital market analysis experience, working in the Capital Markets Group at Fannie Mae. There he managed more than $20 billion in asset purchases during his last year of employment and cultivated and developed business relationships with some of largest banks in the country and several Wall Street firms.
George Ashton has an MBA from the University of Maryland and a dual BS in Finance and Economics from the College of William and Mary. He was recently appointed to the Maryland Clean Energy Center by Governor O’Mally, he also serves on the Board of the Washington Jesuit Academy, a middle school for promising disadvantaged male youths.
Sol Systems Team
![]() |
Christine Cauley - Director of Portfolio Management: Christine Cauley joins Sol Systems with over a decade of experience in investment management. Immediately prior, Ms. Cauley worked as an Operations Manager and Equity Trader at Century Capital Management. There she actively traded Small, Mid, and Large Cap stocks and performed technical analysis to identify significant levels within stocks and markets to trade on for her team. She also has worked on the computer programming side during her time at Rhumbline Advisers Corporation where she automated the pooled fund reporting and accounting process by writing several scripts, batch files, recording macros, and designing a custom report that was disseminated to clients. Ms. Cauley holds a Master of Science from Boston University in Computer Information Systems. She graduated with honors from Bentley College with Bachelor of Science in Finance. |
![]() |
Ram Dobson - Programmer: Ram Dobson joins Sol Systems with over 6 years of experience developing web-based applications for businesses and the government. His core experience has been with Ruby, Rails, the web, and an agile, object-oriented design process. Immediately prior, he worked as a web application developer for the National Institute on Drug Abuse where he designed and developed database web backed applications using Perl, an ORM (DBlx::Class), and an MVC framework (Catalyst). Mr. Dobson holds a Bachelor of Mathematics from Temple University, with extensive Computer Science coursework. |
![]() |
Michael Gibson - Chief Technology Officer: Michael Gibson joins Sol Systems as an experienced software engineer and IT professional who specializes in web design and software development. Prior to becoming a member of the Sol Systems team, he worked as a software engineer with Ariadne Genomics, LLC, where he built systems to help the National Institute on Drug Abuse (NIDA) streamline their business and research processes. Mr. Gibson also carries more than 6 years of experience as a software consultant; he has worked with Falling Creek Design Group, a company which he helped found, and as an independent consultant. Mr. Gibson holds a Bachelor of Science in Computer Engineering from the University of Virginia. |
![]() |
Andrew Gilligan - Associate: Andrew Gilligan joins Sol Systems after completing his undergraduate education at Georgetown University. Mr. Gilligan served as the project leader for a student-run energy consulting team created to ease the solar procurement process for homeowners and businesses. He holds a Bachelor of Science in Science, Technology, and International Affairs, specializing in Energy studies, and also a certificate in Business Diplomacy from Georgetown. |
![]() |
Sudha Gollapudi - Director of Strategic Partnerships: Sudha Gollapudi comes to Sol Systems with over six years of experience in the renewable energy sector. Prior to joining our team, she worked as a Consultant for a renewable energy consulting company, working with large companies and organizations to improve their energy footprint. Ms. Gollapudi holds a Master’s in Environmental Management and a Certificate in Energy from Duke University’s Nicholas School of the Environment as well as a Certificate in International Development from Duke University’s Sanford School of Public Policy. She graduated with a Bachelor of Arts in Environmental Studies from Bates College. |
![]() |
Natacha Kiler - Director of Sales & Marketing: Natacha Kiler brings eight years of business development, sales, and marketing experience to Sol Systems. Previously, Ms. Kiler worked in Sales and Marketing for SunEdison, a pioneer in the solar energy services industry, where she helped generate more than 320 MW of sales pipeline. Ms. Kiler holds an MBA from the University of North Carolina - Chapel Hill with a concentration in Marketing and Sustainable Enterprise. She obtained a Bachelor of Arts degree in English from Vanderbilt University. |
![]() |
Anna Noucas - Associate: Anna joins Sol Systems after having worked as an intern for the Office of Senator Olympia J. Snowe (R-ME). Ms. Noucas graduated from Bowdoin College in Brunswick, ME with a Bachelor of Arts degree in Government and Legal Studies and Environmental Studies. While at Bowdoin, Anna worked for the Upward Bound program at Bowdoin College helping to provide access to college for low income and first generation college students in Maine. Additionally, Anna was a member of the Bowdoin Women’s Volleyball team and captained the team during her senior season. |
![]() |
Sara Rafalson - Associate: Sara Rafalson joins Sol Systems after having worked at the UNC Office of Waste Reduction and Recycling for three years. Prior experience includes a fellowship in the Office of the Secretary at the U.S. Department of the Interior and an internship at the Alaska Center for the Environment focusing on climate and energy legislation. Ms. Rafalson graduated from the University of North Carolina at Chapel Hill where she finished Phi Beta Kappa and highest distinction with a Bachelor of Arts in International Studies, Sustainability, and Spanish. |
![]() |
Caleb Thompson - Programmer: Caleb Thompson comes to Sol Systems with two years of previous software engineering experience. He specializes in enterprise application development and web development, and has experience in both the financial and defense industries -- including expertise in networking, artificial life programming, and signal processing. Previously, he worked as a Software Engineer at BIT Systems where he developed software solutions as prototypes for potential defense industry contracts. Mr. Thompson holds a Bachelors of Science in Software Engineering from the University of Advancing Technology in Tempe, Arizona. |
|
Daniel Yonkin – Director of Regulatory Affairs: Dan Yonkin comes to Sol Systems having spent the past two years within the Copernicus Institute for Sustainable Development as a Huygens Scholar in the Netherlands, researching policies to stimulate the deployment of renewable energy technologies. Additionally, while abroad, Dan worked briefly for a renewable energy consultancy researching European and American energy reform policies. Mr. Yonkin holds a MS in Sustainable Development specializing in energy policy and tradable permit markets from Utrecht University, where he graduated with highest honors. He graduated Phi Beta Kappa with a Bachelor of Arts in Geography and English from Vassar College. |
|
William Graves - Solar Analyst Intern: William Graves joins Sol Systems during his third year at American University, where he studies Business Administration and International Relations with a specialization in International Environmental Policy. Before joining Sol Systems, Mr. Graves interned at the District Department of the Environment, where he collaborated on the development and deployment of DC’s electric vehicle infrastructure. He has also worked at Affinity Lab. On campus, Mr. Graves is a mentor in a student organization that fosters social entrepreneurship and positive community change. |
|
|
Jessica Robbins - Solar Analyst Intern: Jessica Robbins joins Sol Systems during her senior year at Georgetown University, where she studies Science, Technology and International Affairs. Her academic focuses are energy and environmental studies with a certificate in international development. Ms. Robbins currently serves as the Secretary of Sustainability for Georgetown's student government. Additionally, she leads a project development team for Georgetown Energy, a student organization dedicated to bringing efficiency and renewable energy to campus. Jessica brings her energy policy research to Sol Systems and looks forward to gaining experience in solar finance. |








