Complex sentence: Following the dismissal of Bohn, an interim CEO was appointed, longtime Porsche employee, Heinz Branitzki, who served in that position until Wendelin Wiedeking became CEO in 1993.
Split into simpler sentences: Following the dismissal of Bohn, Heinz Branitzki, a longtime Porsche employee, was appointed as interim CEO. Branitzki served in that position until Wendelin Wiedeking became CEO in 1993.