Born in Burg bei Magdeburg, Heinz Hennig was educated at the boarding school Musisches Gymnasium Frankfurt, namely by Kurt Thomas.
[1] He prepared the boys choir for the recording of Bach cantatas in a collaboration with Gustav Leonhardt, published as "Das Kantatenwerk" by Teldec.
[2] He also premiered works of composers such as Alfred Koerppen, who wrote in 1951 a youth opera Virgilius, der Magier von Rom that the choir performed successfully at the "Sängerfest" in Frankfurt.
[3] Heinz Hennig was a teacher for choral conducting at the Hochschule für Musik und Theater Hannover between 1962 and 1992, serving as the institute's vice president from 1970.
To celebrate the choir's 50th anniversary in 2000, Hennig conducted Bach's St Matthew Passion in a collaboration with the Thomanerchor, prepared by Georg Christoph Biller.