Jensen began his career as an apprentice with furniture manufacturer Georg Petersens Møbelfabrik in Copenhagen, where he gained experience in the production of wooden furniture. After serving in the Danish Navy during the Second World War, he returned to Petersens before joining the FDB furniture company in 1949.
It was at FDB that Jensen began designing affordable modern furniture for the general public. He worked on projects such as folding chairs, sofa beds and coffee tables, all characterized by a simple, functional aesthetic.
In 1955, Jensen opened his own design studio and began working with furniture companies such as Selig and Zoumboulakis. His model 63 chair, created in 1963 for Selig, became an icon of modern Danish design, with its organic shape and curved backrest in teak or leather.
Jensen continued to design furniture throughout the 1960s and 1970s, working on projects for companies such as Bernstorffsminde Møbelfabrik and Leolux. He died in 1982, leaving behind an important legacy in the world of Danish design.