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The Human Factors and Ergonomics Society is an international multidisciplinary professional association of more than 4,500 members in 58 countries. Its members include psychologists, engineers, designers, scientists, and usability professionals, all of whom have a common interest in designing systems and equipment to be safe and effective for the people who operate and maintain them.

Members are employed in industries, universities and colleges, government agencies, consulting firms, military research centers, public utilities, and other settings. More than 40% hold a doctoral degree, a third hold a master's degree, and about 15% have a bachelor's degree (as the highest degree held in all categories). Students make up about 15% of the total membership.

Anyone with an interest in the field may join HFES. HFES offers several categories of membership, all of which have the same member benefits.