His musical teachers included Uwe Gronostay, Edgar Krapp, Wolfgang Schäfer and Heinz Werner Zimmermann.
He serves as a member of the advisory board for a concert series, Gallus-Konzerte, organised around the historic Dahm [de] organ of 1709 and focused on Baroque music.
[1][2] From 1994, Großmann has been a lecturer of Partitur- und Generalbass-Spiel (playing from the score and figured bass) at the Hochschule für Musik Mainz.
[1] In 2009, he played the organ of the Alte Oper in an anniversary concert of the International Choir Frankfurt, performing Mendelssohn's Paulus, with soloists including Jonas Kaufmann and Jan-Hendrik Rootering.
[5] The Referat Kirchenmusik under his leadership commissioned a new oratorio, Laudato si', which was performed in 2016 to celebrate the RKM's fiftieth anniversary.