Doctor of Philosophy, University Bonn, Germany, 1954. Docent, University Bonn, Germany, 1960. Doctor (honorary), University Tbilisi, Georgia, 1988.
Doctor (honorary), University Innsbruck, Austria, 1994. Doctor (honorary), University Cork, Ireland, 1999.
Assistant professor University Münster, Germany, 1956-1960, associate professor Germany, 1964-1966, professor Germany, 1966. Private docent University Bonn, 1960-1964, professor, 1974-1994, professor emeritus, since 1994. Professor University Bochum, Germany, 1966-1974.
Honorary professor Pedagogical University, Tbilisi, 1996. Director Sprachwiss. Institute, University Bochum, 1966-1974, dean faculty of philology, 1973-1974. Director Sprachwiss. Institute, University Bonn, 1974-1994.
(Format Hardcover German Subject Language Arts Disciplines)
Committee member Unesco: Celtic Cultures, Paris, since 1984, editor History and Culture of the Celts, 1986. Member Berliner Georgische Gesellschaft, Berlin, since 1994. Member correspondent Société Roumaine d'Études Indo-Européennes, Bucarest, 2001.
Fellow Georgian Academy of Sciences (foreign). Member Indogermanische Gesellschaft (honorary), International Society Dialectology and Geolinguistics.
Married Doris Buchholz, January 19, 1957. Children: Susanne, Ulrich.