Forster studied speech sciences, German studies, social studies, political science and placed alongside 1. and 2. State exams and doctorate, and a speaker's examination (DGSS). He is a lecturer for German as a foreign language and oral communication at the University of Saarland in Saarbrücken.
Since 1998, he has been responsible for the module "Oral Communication" at the "Consulting" (Institute for Business Informatics, University of Saarbrücken). He also works as a communication trainer in companies, mainly in the IT sector. The overwhelming number of participants in his events are consultants, mostly at the end of 20 - 40.