LEED Professional Credentials distinguish building professionals with a thorough understanding of green building practices and principles and the LEED Green Building Rating System. There are now two categories of LEED Professional Credentials: LEED Green Associates; and LEED Accredited Professionals. The LEED Green Associate credential is intended for professionals who want to demonstrate green building expertise in non-technical fields of practice. LEED Accredited Professionals (LEED APs) have demonstrated the knowledge and skills to successfully steward the LEED certification process. LEED APs can specialize in several areas, corresponding to the LEED rating systems for Building Design and Construction, Interior Design and Construction, Homes, Operations and Maintenance, and Neighborhood Design.