Deke Welling


Deke has over 16 years’ experience in the energy industry with an emphasis on renewables and energy efficiency. Prior to entering the renewables sector, Deke was the CEO of Welling Resources, an energy development company focused on the exploration of oil and natural gas reserves in the U.S. It was this experience that lead him into the renewables sector and help leading a charge for more sustainable resources. Additionally, Deke has served as the CEO of Circle L Solar, Inc., a top 100 solar installer in the United States since 2016. Through his leadership, Circle L Solar has grown in revenue from $600,000 in 2016, to over $11,000,000 in 2018 resulting in being named Entrepreneur of Year for the Energy Industry by the American Business Awards® in 2019. Deke has also held a Registered Representative status obtaining both his Series 22 & 63 licenses through FINRA and has over 10 years’ experience in the finance and investments within the energy industry.

Shaun Sierra


Shaun has over 18 years of C-Level management experience, with 12 years in the energy industry. Prior to Co-Founding CLS Sustainable, Inc, Shaun served as Co-Founder and Chief Development Officer for Circle L Solar, Inc. As head of Development, Shaun created strategic partnerships with other installers, manufacturers, financial institutions and distributors that helped propel a growth rate of over 1,500% within three years. Shaun also has served as President of Quanah Energy, an energy development organization that focuses on the acquisition and divesture of energy related properties throughout the United States, facilitating the A&D of over 100,000 acres for energy development.

Kevin Warren


Kevin Warren is a solar veteran with over 12 years of experience in the field. Through his career, Kevin has originated, designed and/or engineered over 26 MW of PV installations ranging from small commercial to utility scale projects throughout Texas, California, Colorado and North Carolina. Kevin holds a Photovoltaic Technical Sales Professional Certification from the North American Board of Certified Energy Practitioners and certifications from Solar Energy International in PV Installation, PV Technical Sales, PV battery based design, PV design and engineering, and PV operations and maintenance. Along with PV expertise Kevin is a LEED Green Building associate, a certified building analyst from the Building Performance Institute, a Certified Renewable Energy Professional from the Association of Energy Engineers, and holds a designation in High-Performance Sustainable Buildings from the BOMI Institute. Kevin studied Electrical Engineering at the University of Texas at Arlington.

Jeff Shawn


Jeff has over 15 years’ experience and expertise in the solar industry. Since 2003, Jeff has been a pioneer in the solar industry for the state of Louisiana having created the state’s first photovoltaic (PV) integration company, Gulf South Solar. Jeff is a North American Board of Energy Practitioners (NABCEP) Certified PV Installation Professional (#031409-126) and a Master Electrician. Jeff has his B.S. in Engineering Technology from Louisiana State University with a Minor in Electrical Engineering. Jeff has also helped author the Louisiana Renewable Energy Development Act of 2003 (Net Metering), authored several articles on solar, energy efficiency, sustainability and emergency power in several publications, created and taught the NABCEP certified solar program for Baton Rouge Community College, and was named ‘Solar Hero” by the American Solar Energy Society in April of 2010.