Born in 1960, Hans-Jürgen Rupertus holds a Dipl.-Betriebswirt (FH) business administration qualification from a German University of Applied Sciences (FH) and studied business administration with a specialization in taxation in Worms together with Ulrich Herzog. From 1987 to 1991, Hans–Jürgen Rupertus’ first job led him to a tax advising firm in Mannheim, where he provided tax advice mostly to small- to medium-sized companies of all legal forms.

After passing the tax advisor’s exam, he worked for a short time in the auditing and tax advising firm of Dr. Keiper und Partner in Mannheim in 1992, leaving shortly thereafter to start his own business by taking the reins of a smaller tax advising firm in Weinheim. In 2005, he merged his firm with Treuhand Heidelberg.