The Sol Team

Our team is made up of leading experts in the solar industry across all critical disciplines including financiers, engineers, lawyers, project managers, asset managers, energy markets analysts, and policy analysts.

Get to know our leadership.


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George Ashton

Founder & Member of the Board
George Ashton, co-founder of Sol Systems, serves on Sol Systems’ Board of Advisors and Board of Directors. In his time…
Meet The Founder

Yuri Horwitz

Chief Executive Officer
Yuri Horwitz, co-founder and Chief Executive Officer of Sol Systems, oversees strategic growth and performance as well as investment strategy…
Meet The Founder

Executive Team

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Olga Bukharina

Vice President, Finance and Treasurer
Olga Bukharina is a member of the Accounting and Finance team, as a VP of Finance she is managing Treasury,…
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Jason Cimpl

Vice President, Trading
Jason Cimpl manages Sol Systems’ environmental commodities trading desk and the company’s SREC portfolio of 12,000+ solar assets. He oversees creation…
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Dan Diamond

Vice President, Project Management and Construction
Dan Diamond leads the Construction Team on negotiating, executing, and managing the PV Project EPC contracts. The team ensures projects…
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Hans Dyke

General Counsel
Hans Dyke joins Sol Systems as General Counsel. Prior to Sol, Hans worked at international law firm Bracewell LLP, where…
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Ray Henger

Chief Development Officer
Ray Henger serves as the Chief Development Officer and leads Sol Systems’ integrated development, finance and delivery teams. In his…
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Andrew Gilligan

Vice President, Sol International
Andrew Gilligan serves as the Vice President of Sol International. Previously, Mr. Gilligan led the Sol Systems’ investment team, working…
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James Machulak

Vice President, Asset Management
James Machulak is the Vice President of the Asset Management Department, where he oversees efforts to proactively manage risks associated…
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Phil Priolo

Vice President, Risk and Operations
Phil Priolo serves as the Vice President of Risk and Operations and leads the risk management and trading operations teams.…
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Patty Rollin

Senior Vice President, Utility-Scale Solar Development
Patty Rollin serves as the Senior Vice President of Utility-Scale Solar Development and leads Sol’s utility-scale solar development business unit.…
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Liz Weir

Chief Operating Officer
As Chief Operating Officer, Liz Weir focuses on organizational development and operational excellence for Sol Systems. Liz comes to Sol…
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Andrew Williams

Vice President, Policy & Corporate Affairs
Andrew Williams leads Sol’s growing Policy and Corporate External Affairs team as it creates and shapes renewable energy markets and…
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