Registered with the attorneys' registry of Zurich
German, English, French, Italian
- Dr. iur., University of Basel (1977)
- Attorney at law, Zurich (1973)
- M.B.A., INSEAD, Fontainebleau (1971)
- M.C.L., University of Michigan Law School (1970)
- Lic.iur., University of Zurich (1969)
- Foundation of the law firm ALTENBURGER in 1978
- Sandoz AG, Basel, Strategic marketing (1972-1975)
- Zurich Bar Association (ZAV)
- Swiss Bar Association (SAV)
- International Bar Association (IBA)
- American Bar Association (ABA)
- International Fiscal Association, Swiss Branch
- Vice-President, International Fiscal Association, Liechtenstein Branch
- Board of the Tax Chapter of the Swiss-American Chamber of Commerce
- Visiting professor for permanent education at the University of St. Gallen
- The International Academy of Estate and Trust Law