Funny you should ask. The title topic links back to one person, Lillian Gilbreth, who earned the first Ph.D. in I/O Psychology. She was also an engineer whose consulting led GE to create the foot pedal trash can and put shelves in refrigerators. She and her husband had 12 children, two of whom wrote the movie Cheaper by the Dozen. So what does an I/O Psychologists do and why do you need one?