Subsequently , he was involved in project planning at the Research Institute for Pig Iron Production and the Construction Institute at Unterwellenborn .
Between 1965 and 1990 Lippmann worked successively as an academic assistant , project engineer and group leader .
Subsequently , Lippmann was involved in project planning at the Research Institute for Pig Iron Production and the Construction Institute at Unterwellenborn .
Between 1965 and 1990 Lippmann worked successively as an academic assistant , project engineer and group leader .