AIAA - American Institute of Aeronautics and Astronautics, whose "mission is to address the professional needs and interests of the past, current, and future aerospace workforce and to advance the state of aerospace science, engineering, technology, operations, and policy to benefit our global society."
SFTE - The Society of Flight Test Engineers is a fraternity of engineers, whose principal professional interest is the flight testing of aerospace vehicles.
JETS: Junior Engineerings Technical Society - Aimed at high school students, this opganization provides an opportunity to contribute back to the field and educate and encourage young people about the profession.
AIChE - The American Institute of Chemical Engineers is the world's leading organization for chemical engineering professionals, with more than 40,000 members from 93 countries.
Sloan Career Cornerstone Center - Resource for anyone interested in exploring career opportunities in science, technology, engineering, mathematics, computing, and healthcare.