Stephan Mayer was born in 1973 in Burghausen.
1993 Higher education entrance qualification (Abitur) at the König-Karlmann Gymnasium in Altötting
1993 - 1997 Studied law at the Ludwig Maximilians University, Munich
Since 1993 Member of county executive board of the Medium and Small Business Union of the Christian Social Union (CSU)
Since 1996 Member of Neuötting town council and Altötting county council
1998 - 2000 Period of practical legal training in the Higher Regional Court Munich and Government of Upper Bavaria
2000 - 2009 Lawyer in the Salzberger, Reiter, Mandlsberger & Kollegen Mühldorf
Since 2002 Member of the German Bundestag and Deputy chairman of the CSU group on the county council Altötting
Since 2006 Deputy chairman of the Bavarian branch of the Union of Expellees
Since 2008 Member of the executive Committee of the Union of Expellees
2009 - 2018 Lawyer in the Nachmann Rechtsanwalts GmBH firm in Munich
Since 2010 President of the THW-Bundesvereinigung e. V.
Since 14.03.2018 Parliamentary State Secretary at the Federal Ministry of the Interior, Building and Community