Suntegra Team

Oliver Koehler

CEO and Founder

Oliver Koehler has worked in the solar industry for over 15 years. Prior to founding Integrated Solar Technology (IST), Oliver worked at solar industry leaders such as SunPower Corporation and BP Solar where he served as the global Product Manager for cells and solar modules between 2001 and 2012. Prior to his career in solar, Oliver worked as a consultant at Deloitte & Touche and was an officer in the United States Army, where he attained the rank of Major. He has an MBA from the University of Washington and a BA from Brown University.


Deborah Lewis

Business Development Manager (West Coast)

Deborah Lewis brings experience from the solar, manufacturing legal, and financial and fields to her position at IST. Prior to joining IST, Deborah Lewis worked for six years with BIPV, Inc., a pioneer in the design, development and manufacturing of roof integrated solar panels. While at BIPV Inc, Deborah Lewis was instrumental in the development, marketing and sales of two roof-integrated solar panels. Prior to joining the solar industry, she managed a sheet metal manufacturing business and worked as a paralegal specializing in corporate formation and transactions. She also has a Series 7 Securities License.

Noah Siegel

Business Development Manager (NE & CAN)

Noah Siegel is a young professional with a passion for renewable energy and product innovation. After graduating Summa Cum Laude from Tulane University’s A.B. Freeman School of Business in 2013, Noah worked as a solar project developer focused on commercial solar development and off-grid solar street light projects. Noah is an active participant in a number of green energy focused networking groups in New York City and is currently studying for his NABCEP Certification. Noah is contributing to a number of developments at IST including dealer recruiting, product training, and marketing strategy.