Professional astrologer with a focus on mundane astrology, has written several important books on the subject, his main profession is notary.
After studying law, he first worked for a publishing house and then as a judge at the Mannheim Regional Court. A serious illness, which could not be treated conventionally, brought him into contact with a spiritual healer in 1986, whose treatment allowed him to recover. However, such treatments were only permitted to doctors and alternative practitioners; in any case, the authorities and courts interpreted the law as such. Thereupon Firgau advocated for many years that spiritual healing does not require any examination and admission as a non-medical practitioner, and for this purpose participated in the foundation of the Dachverband Geistiges Heilen e.V. in 1995. (DGH). With a fundamental decision of the Federal Constitutional Court of 2 March 2004, it was able to achieve full success in this respect. From 1995 to 2008 Firgau was on the board of the Dachverband für geistiges Heilen e.V. (umbrella association for spiritual healing). (DGH), its first chairman from 1998 to 2002.
He has been a certified member of the German Astrologers Association (DAV) since 1999. From 2008 to February 2010 he headed the Economic and Mundane astrology Section of the DAV. He is a speaker at many professional congresses and author of books on this topic. Another focus of his interest is horary astrology on legal issues.
Today he works full-time as a notary public.