Harald Hoeren began his musical career with the Cologne Camerata. As harpsichordist and on the fortepiano he has made over fifty recordings of music from the early Baroque to the Viennese Classical periods. In addition to his activities as a soloist, he has devoted himself as a member of Trio 1790 to chamber music repertoire from the early classical to the early romantic periods.

Concert tours have taken him to almost all the countries of Europe, to Asia, and to North and South America. His collaboration with the Cologne Chamber Orchestra has continued for many years, during which he has appeared as a soloist and ensemble-player in many concerts and recordings. In 1983 and 1990 he was Guest Professor at the University of the Philippines in Manila. Since 1984 he has led a class for historical keyboard instruments at the Frankfurt am Main Musikhochschule, were he was appointed Professor in 1999.