1986 - 1993: Employed as a tax clerk and balance sheet accountant in the tax consulting firm Dr. Wehner und Partner, in Karlstadt and Würzburg respectively
1994 - 1997: Employed as a tax clerk and balance sheet accountant in the law firm Müllerklein & Sagasser, auditors and tax consultants, in Würzburg
1997 - 2015: Tax consultant and partner in the law firm Müllerklein & Schlereth, auditors and tax consultants, Würzburg
since 2016: Partner of PKS Stahl & Partner mbB