Before she studied, Jongerius completed an apprenticeship as a carpenter (graduated in 1993). Through her studies she became a member of Droog Design. This designer collective was based in Amsterdam. "Jongeriuslab", her own company, was already established in her final year. Besides her office in Rotterdam there is also one in Berlin. Besides design, Hella is also active as a lecturer. She taught industrial design in Eindhoven from 1998 to 1999 and product design in Berlin from 2005 to 2012. Her works have been shown in exhibitions worldwide, including in London, Paris and New York.
Her clients include IKEA, Danskina, Maharam and Vitra.