1984 - 1986: University of Basel, Switzerland, studies in Mathematics, Philosophy and Physics.

1986 - 1990: University of Zürich, Switzerland, studies in Mathematics and Computer Science.

November 1990: M.S. in Mathematics at the University of Zürich, Switzerland (advisor Prof. Hans Läuchli).

November 1994: Dr.sc.math., ETH-Zürich, Switzerland.

Supervisor: Prof. Dr. Haim Judah (Bar-Ilan University, Israel).

Jury: Prof. H. Läuchli, Prof. E. Engeler, Prof. W. Hunziker.

July 1991 - October 1995: Assistant of mathematics at the ETH Zürich (Switzerland).

April 1997 - September 1997: Assistant of mathematics at the ETH Zürich (Switzerland).

October 2000 - March 2001: Professorship replacement in Mathematics at the University of Basel (Switzerland).

March 2001 - June 2005: Lecturer at

*Queen's University Belfast*(Northern Ireland).Since 2009: Lehrbeauftragter at the

*University of Zürich*(Switzerland).

November 1995 - April 1997: Post-doctorate research grant from the

*Swiss National Science Foundation*(Schweizerischer Nationalfonds) for research in set theory at the*University of Caen*(Normandy, France).November 1997 - September 1998: Post-doctorate research grant from the

*Institut d'Estudis Catalans*for research in set theory at the*Centre de Recerca Matemàtica*in Bellaterra (Barcelona, Spain).November 1998 - September 2000: Post-doctorate research grant from the

*Swiss National Science Foundation*(Schweizerischer Nationalfonds) for research in set theory at the*University of California at Berkeley*(California, U.S.A.).

Since October 1997: Reviewer of the

*Mathematical Reviews*.Member of the

*Association for Symbolic Logic*, the*London Mathematical Society*, the*Irish Mathematical Society*, the*American Mathematical Society*, and of the*Swiss Mathematical Society*.