Our membership is divided into two categories: Green Building Advocates and Green Building Specialists. Green Building Advocates are companies and organizations that actively support the green building industry and want to demonstrate their commitment through CaGBC membership. Usually, Advocates do not require access to LEEDÂ® benefits and are not building owners. Advocates may include: Manufacturers, Retailers, Non-owner Tenants, Government Policy Departments, Utilities, Academic or Research Institutions, Industry Associations and other NGOs. Green Building Specialists are companies and organizations that benefit from the LEEDÂ® green building rating system for their sustainability projects and help maintain the continuous improvement of this system through their CaGBC membership. Specialists may include: Owners, Tenants, Landlords, Engineers, Architects, Designers, Developers, Contractors, Builders, Real Estate Brokers or Managers and Government.