Functionality is the basis of the work
Corinna Kretschmar-Joehnk was born in November 1966 in Bielefeld. She completed her studies with a degree in the field of Interior Design in 1993. Since 2003, she has been the Managing Partner of JOI-Design GmbH in Hamburg.
Peter Joehnk was born in July 1957 in Kronach / Upper Franconia. In 1981, he attained his "Diplom" degree in Interior Design, and in 1983 he successfully completed distance learning studies as a Building Biologist. Since 2003, Peter Joehnk has been the Managing Director of JOI-Design GmbH in Hamburg.