Human Factors Engineers and Ergonomists focus on optimizing the design of products, systems, and environments to enhance user experience and performance. They analyze how people interact with technology and workspaces, aiming to improve usability, comfort, and safety. Responsibilities include conducting user research, performing ergonomic assessments, developing design guidelines, and testing prototypes. They collaborate with multidisciplinary teams to create solutions that reduce user errors and enhance productivity, ensuring that designs accommodate the physical and cognitive abilities of users.