PI TAU SIGMAis the International Honor Society for Mechanical Engineers. Pi Tau Sigma members are chosen on a basis of sound engineering ability, scholarship service, leadership, and integrity. The Pi Tau Sigma mission is to strive to create better engineers through commitment to academic excellence and dedication to service. Pi Tau Sigma prides itself in the core values: Integrity (soundness of character and moral conduct), Service (serving the mechanical engineering profession and the community), and Leadership (fostering initiative through example in a professional manner). Pi Tau Sigma is a member of the Association of College Honor Societies. There are presently 178 collegiate chapters at universities in the United States, Puerto Rico, Mexico, and Qatar.