Henry is son of parents of Croatian & Hungarian origin, resident in Berlin and Zagreb.

Most of his early years he spent in Zagreb. At the end of 70's he's been a member of Croatian legendary rock band „Hamatri“, which collaborated with Radio Television Zagreb (Zarko Cernjul) and Zvonko Spisic, „Novi Fosili“.

Because of his passion for contemporary music, at the beginning of 80's he first went to London and then to Berlin, where he immediately started to work with many international musicians and visual artists on different music productions: 

Among others with Potch Potschka (Spliff, Nina Hagen Band), Danny Deutschmark (Klaus Lage Band), F.J. Krüger (Ideal), Paul Lukas (Element of Crime), Reggie Worthy (Ike & Tina Turner, Peter Maffay etc.), Zam Johnson (Stevie Wonder, Tom Petty, etc.), Mack Goldsbury (Frank Sinatra, Cher, etc.). At that time he also worked on different film music broadcast productions for German television.

Since 2000 his work is mostly in the field of new media. He have been specialized in web design and web programming. Because of his passion for contemporary music, since 2007, with the support of leading music-software production companies and legendary "Neuen und Avantgarde Musik", he is permanently updating his own contemporary music "Sound Of Cities". Here are represented artists such as Hans Joachim Irmler (Faust), Daevid Allen (Gong, Soft Machine), Amon Düül II, Dieter Moebius (Cluster), Prof. Paulo C. Chagas (Former sound director and composer-in-residence at the Studio for Electronic Music at WDR Radio Cologne with Karlheinz Stockhausen.), Oscar Wiggli, Francois Bayle (From 1966 - 1997 director of the Groupe de Recherches Musicales / GRM and the Institut national de l'audiovisuel / INA.), Prof. Silvio Foretic, to name just few.

From 2012 he spent more and more time with a collecting of modern Art, and also started the "Art Agency" which is presenting only few exceptionalI Artists. 

After a few years of break in music activities, in 2020 he started again to play and to compose in a brighter spectrum of musical environments. In this period he developed some classical creations, like "For Constance", and the compositions for the Jazz Orchestra he's still working on.

In 2025 he's been working on the production of the 1'st album "Prisilna Budnost" / "Forced Vigilance" by the Croatian band Gnoma Cirkus.

In the player: "Blitze"  2003 Composed, performed by Henry Stag with Lars Rudolph on the trumpet