From 1982 to 1984 he received acting lessons at the Westfälische Schauspielschule in Bochum, but left without graduating.

Lohmeyer made his stage debut in the play called Was heißt hier Liebe at the Schauspielhaus Bochum.

Afterwards he performed at theatres in Düsseldorf, Stuttgart, Hamburg, and at the Schiller Theater in Berlin.

In 2009 he returned to the Schauspielhaus Bochum for a new stage version of the play Menschen im Hotel.

Loymeyer made his film debut in the comedy Tiger, Lion, Panther in 1988.