In 1997 he gave his conducting debut with Pergolesi's "La serva padrona." Since then his international career has included concerts with the baroque ensemble Capella Savaria, the Hungarian Philharmonic Orchestra Debrecen, the Georgian Chamber Orcehstra Ingolstadt, and the Failoni Chamber Orchestra of the HUngarian State Opera Budapest. Since 2000 he has been a regular guest conductor at the Jewish Summer Festival in Budapest, where he conducted Mendelssohn's Violin Concerto with Igor Oistrakh in 2003. This concert was broadcast by Hungarian Radio and Hungarian Television.
In 2004 Daniel Grossmann founded the Ensemble28 which specializes in historical performance practices.
With this orchestra he performed Beethoven's Third Symphony in the hall where the world premiere took place
using 28 musicians in the exact instrumentation of the premiere orchestra.
In spring of 2005 his second CD appeared on Enja Records with works of Marc Neikrug and Viktor Ullmann.