Teja Andresen came into contact with music at an early age through domestic music-making and choral singing. He started playing the piano at the age of five, and at twelve his musical focus changed to double bass. He quickly became fascinated with the orchestra and joined both the Landesorchester Schleswig-Holstein and the Bundesjugendorchester.
Originally from Lübeck, he began his studies in 1989 in Hamburg with G. Dzwiza. He became a member of the Deutsch-Russische Philharmonie and a member of the Schleswig-Holstein Festival Orchestra under the direction of Leonard Bernstein. During his internship with the Hamburg State Orchestra, he attended master classes with Ludwig Streicher and Klaus Stoll, and won various foundation prizes; he became a permanent member of the Symphonieorchester des Bayerischen Rundfunks on April 1, 1995.