D r. Hans J. Langer is a German self-made billionaire and a pioneer in the field of 3D printing and additive manufacturing. With a PhD in physics, he founded his company, EOS (Electro Optical Systems), in 1989. He has since built it into a world leader in the technology of direct metal laser sintering (DMLS) and polymer laser sintering, which are advanced forms of 3D printing for industrial applications.

EOS's high-end 3D printing machines are used to create complex, high-performance parts for a wide range of industries, including aerospace, medical, and automotive. He has been the visionary leader of the company, driving its technological innovation and its global expansion. The company remains privately held by him and his family. In addition to his core business, he is a prolific investor in other technology startups through his family office, Langer Group.