Offermanns was born in
Merkstein on 24 October 1937. He studied chemistry at the
Rheinisch-Westfälische Technische Hochschule Aachen (RWTH Aachen). He worked on his doctoral thesis as assistant to
Friedrich Asinger on the border between organic and technical chemistry. After receiving his doctorate, he worked afterwards on industrial chemistry and pharmaceutical research at the
Degussa AG and at Degussa Antwerpen NV and Degussa Inc., New York. In 1976, Offermanns was appointed member of the management board of Degussa AG with the responsibility for research and development. Offermanns remained a member of the board until 2000. He managed the development and expansion of Degussa's research center in
Hanau-Wolfgang. He died in
Hanau on 24 November 2025, at the age of 88. == Honours ==