Career
After passing the Mittlere Reife, Manfred Ach took a traineeship from 1957 to 1961 for the higher non-technical administrative service at the social security office of Würzburg. From 1962 to 1966 he worked at the social security office of Nürnberg. Then from 1966 to 1970 he was employed at the social security authority of Bavaria in Munich, before transferring in 1970 to the government auditing office in Würzburg.
From 1991 to 1994 he was the head of this authority, now as an Oberregierungsrat (a senior civil service rank in Germany) in the senior administrative service (since 1989).
Later he was elected the deputy chairman of the local Christlich Soziale Union (Christian Social Union) association for the district Würzburg-Land. Foreign the Bavarian Landtag elections in 2008, he was no longer a candidate.