Welcome to the CEM Exam Prep Center — your complete hub for preparing for the Certified Energy Manager (CEM) certification. Whether you are new to energy management or upgrading your professional skills, this page provides everything you need: study guides, free courses, topic explanations, and recommended resources. The CEM credential, awarded by the Association of Energy Engineers (AEE), is one of the world’s most recognized qualifications in energy management and efficiency. This page will help you build a strong foundation and prepare confidently for the exam.