Founded in 1917, the American Association of Petroleum Geologists is currently the world's largest professional geological society. *About AAPG The membership of AAPG includes geologists, geophysicists, CEOs, managers, consultants, students and academicians. The purpose of the organization is to foster scientific research, advance the science of geology, promote technology and inspire high professional conduct. *How to Join There are several levels of membership. Read the various descriptions and requirements to see which one suits you. *Member Services The starting point of several membership services including the log-in to AAPG Members Only, recruiting program tools, contact information and quick access to the various divisions of AAPG. *Student Interests Student-focused news and announcements provide up-to-date information from within AAPG as well as links to other student chapters and the AAPG Student Expo. In fact, why not start a chapter on your campus?