Principal Systems Engineer (T-04 level): Educational background in psychology, human factors, user experience, graphic design, industrial design, or HCI-related field from an accredited university, and at least 8 years of related experience with a bachelors degree; OR at least 6 Years of relevant experience with a master's degree; OR 4 Years with a PhD degree. Principal Systems Engineer (T-03 level): Educational background in psychology, human factors, user experience, graphic design, industrial design, or HCI-related field from an accredited university, and at least 5 years of related experience with a bachelors degree; OR at least 3 Years of relevant experience with a master's degree; OR 1 Year with a PhD degree.