1968 PhD - University of Geneva

Jan. 65 - Mar. 69 CERN ( European Center for Nuclear Research)

Mar. 69 - Apr. 70 DESY (Deut Elektronen-Synchrotron)

Apr. 70 - Apr. 71 CNRC (Conseil Nat. de Rech. du Canada)

May. 71 - Feb. 73 LBL ( Lawrence Berkeley Laboratory)

Mar. 73 Lumonics, Inc

Aug. 74 CEA-Saclay (Commission énergie atom.)

1976 - Mar. 77 Dep. Radiology - Cantonal Hospital cantonal

Mar. 77 - Jul. 77 NIH (Nat'l Inst. of Health)

Sep. 77 - Mar. 78 Inst. Biomed.-. ETHZ/UNI-ZH

Mai 73 - Apr. 78 SIN (Swiss  Inst. for Nuclear Research)

Apr. 78 - Apr. 00 Swiss Federal Office of Energy