Pastor John Grunewald and his wife Michelle are both 1980 graduates of RHEMA Bible Training Center in Tulsa, Oklahoma, USA . This is where they met and married in October of 1980.

There they worked in several ministries in different capacities for a number of years. In 1989 they moved to Terre Haute , Indiana , USA and pastored a church for 4 years. In 1993 they started a Bible school in Heidelberg . Between 1993 and 1999 they travelled, ministered in the Bible school and in other European countries. In 1999 the decision was made to make Bonn the European headquarters for RHEMA Germany. John and Michelle have three children.