Human factors engineers design furniture, facilities, and environments that provide optimal benefits for human beings. This includes addressing concepts like total systems performance and problems related to those theories. Your responsibilities often center on addressing issues of ergonomics and creating solutions. Your duties may include designing and testing new machines or systems for optimal comfort and training operators to take advantage of the innovations you create. You may also have consultation responsibilities, advising management on ways to improve workplace environments to emphasize health, safety, and comfort.