Diplom-Ingenieur, Technology University Aachen, Germany, 1922. Postgraduate, Technology University Aachen, Germany.
Engineer Junkers Corporation, Germany, 1923-1933. Founder, managing director 1st unsubsidized airline systems Junkers Airlines Persia, Iran to Iraq, 1927-1933. Industrial adviser Shah Rheza Pahlevi of Iran, King Faisal I of Iraq.
Consultant engineer England, 1934-1938. Consultant engineer, principal consultant Board Economic Warfare, 1938-1942. With Eastern Aircraft division General Motors Corporation, 1942-1945.
Consultant engineer Defense Department for Berlin Airlift. Consultant for industrial projects in China Kicheng Bank of Shanghai. Designer 3-engine all-metal cargo plane, also transport plane.
Development of hydrogen engine. Consultant Safari aircraft project for underdeveloped countries, 1946-1956. Partner American Development Associates, New York City, 1950-1955.
Professor, head department mechanical engineering Stevens Institute of Technology, Hoboken, New Jersey, from 1957. Guest professor Technology University Berlin.
Member Afghan-American steering committee University Kabul. Served as bomber pilot German Air Force, World War I. Member American Society of Mechanical Engineers, American Institute of Aeronautics and Astronautics, Society Automotive Engineers, American Society Engineering Education, Royal Aeronautical Society, Royal Aeronautical Club, Society German Engineers, Science Society Aviation (Germany), Sigma Xi.
Married Charlotte Garris, March 1, 1932. 1 daughter, Kathleen (Mistress Donald Posner).