Joseph Callahan

Simple Solar Systems LLC provides solar electric energy installation services. It also engages in semiconductor manufacturer services. The company was founded by Joseph Callahan in 1998 and is headquartered in Boulder, CO.

The Solar Energy Industries Association (SEIA) is a leading organization in the transformation towards a clean energy economy. The non-profit company is based in Washington. The American company's goal is to achieve 30% of electricity generation through solar power by 2030. SEIA collaborates with its 1,000 member companies and other strategic partners to advocate for policies that create jobs and promote competition in the solar industry. Since 1974, SEIA has been the voice of solar energy in the United States, working with its members to promote pro-solar policies and advocate for the growth of solar nationwide. Abigail Ross Hopper has been the CEO of the company since 2017.