As a full-time opera singer, Hens had a short and unimpressive career; he sang in Belgrade,
Bangkok, Tokyo, Barcelona and New York (no idea at which venues). He was also the lead singer of a jazz fusion band.
Rather sooner than later, he began devising and directing experimental musical performances involving classical music; quite
interesting stuff, though probably not exactly for opera lovers. For instance, he got refugees and right-wing anti-refugee
activists to performing Verdi's Requiem together. He taught completely deaf people to sing, and had them appear in concert.
Many projects like that. And he managed an Amsterdam off-opera troupe, the OTA. That didn't exclude that he occasionally sang
in his own productions, but not necessarily so. Unfortunately, he didn't refrain from also teaching voice.
Reference: the websites of Hens and the OTA, which latter is also the source for the picture.
