Professionals with CRSS-E fill a unique role among health and human service professionals by filling a need for professionals with specialized supported employment skills and training. They work in a variety of settings, using a combination of strategies and recognizing the need to provide quality services to the public. ICB, a voluntary credentialing system, provides the CRSS-E based on a combination of experience, education and training, and supervised practical experience. The Illinois Model is the basic document that describes the rationale and competencies of the credentialing process for the CRSS-E. ICB recognizes that professionals with CRSS-E are educated in a wide range of areas, utilize many different approaches and techniques, and bring to the field diverse personal and professional experiences. The endorsement system is designed to accommodate and evaluate these professionals.