Dirk Jens Nonnenmacher

Dirk Jens Nonnenmacher (born 3 June 1963) was the CEO and chairman of HSH Nordbank. A trained mathematician, Nonnenmacher worked for several private banks before joining HSH Nordbank in 2007. He became chairman in November 2008, succeeding Hans Berger (banker) and left the bank in March 2011.

Biography
Nonnenmacher studied mathematics and medicine, before receiving his Ph.D. under supervision of Wolfgang Jurkat in 1990. He earned his habilitation in 1993.

On July 9, 2014, all defendants were acquitted, although the Criminal Chamber had proven intent, or at least conditional intent, but found that the defendants had not crossed the "gray zone towards criminal liability". In the oral statement of the reasons for the verdict, the Criminal Chamber stated that it considered all the elements of the crime of breach of trust to have been fulfilled in the case of the defendants in relation to the Omega 55 business, but that the breaches of duty were not "serious and evident" enough for a conviction.

On October 12, 2016, the 5th Criminal Senate of the Federal Court of Justice overturned the acquittals and referred the case back to the Hamburg Regional Court. It stated that the Regional Court had incompletely examined the breaches of duty. It thus upheld the prosecution, which had appealed against the acquittals. In June 2019, the trial was finally discontinued subject to conditions (payment of a fine of 1.5 million euros).