He already sang in a boys' choir. For his vocal studies, he went to Frankfurt, Stuttgart and Milano; already as a
student, he focused on lied interpretation.
In opera, he basically spent his career in Frankfurt (debut in 1983), with "excursions" to Gelsenkirchen and Hamburg, and guest
appearances in Antwerp, Innsbruck, Montpellier, Cairo or Karlsruhe. He sang a few "classical" roles like Don Ottavio, Tamino,
Almaviva, Verdi's Fenton (but also, at the Sanssouci festival in Potsdam 2001, Max, a courageous choice); and a lot of baroque
opera, notably Ulisse in Monteverdi's Ritorno d'Ulisse in patria.
Baroque music (oratorios) was one of his specialties also in concert, where the far more important part of his career took place;
the other specialty was lied. As a concert tenor, he gained considerable international prominence. I totally fail to understand
why: he combines Fischer-Dieskau's ultra-dry sound with an extremely thin voice and no top at all. No, thanks.
Reference: Kutsch & Riemens
Source for the picture (© Jean-Baptiste Millot): Christoph Prégardien's website