NESEA advances the adoption of sustainable energy practices in the built environment. The Northeast Sustainable Energy Association (NESEA) is the nation's leading regional membership organization promoting sustainable energy solutions. For more than thirty-five years, NESEA has supported and inspired a growing network of sustainable energy and sustainable building professionals committed to responsible energy use. NESEA is committed to advancing three core elements: a multi-disciplinary network of professionals, sustainable energy solutions for the built environment, and proven results in the field. The Association operates primarily in the 10 Northeastern states, from Maine to Washington DC.