U.S. Green Building Council

The U.S. Green Building Council (USGBC) is a non-profit organization committed to expanding sustainable building practices. USGBC is composed of more than 15,000 organizations from across the building industry that are working to advance structures that are environmentally responsible, profitable, and healthy places to live and work. Members includes building owners and end-users, real estate developers, facility managers, architects, designers, engineers, general contractors, subcontractors, product and building system manufacturers, government agencies, and nonprofits.

The USGBC is the creator of "LEED", or Leadership in Energy and Environmental Design. LEED certification is required of most individuals wanted to work in the field of green building. The Green Job Bank has a database of LEED training programs and certification, so you can easily find the one that suits you.