Dominik was born in Kreuzlingen, a small town near Zurich, Switzerland, where he grew up with his four sisters and one brother. Since he was born to a German mother and an Austrian father (his grandfather was the Austrian archivist and historian Dr. Meinrad Tiefenthaler), he never held Swiss citizenship, but remained an Austrian-German national.

He received his MD from the Medical School of the University of Zurich, Switzerland. After two years of practice in the neurosurgical program at the Cantonal Hospital in St. Gallen, Switzerland, he moved to New York City to pursue a career in acting.

He completed William Esper’s two-year Professional Program, Shane Ann Younts’ two-year Program for Voice and Speech, and John Dapolito's Master Class for the Working Actor.

He lives part-time in London and in New York City. And how great is that.