| Position | Dates | Department     Institution | 
  
    | International Expert | 2000- | World Bank (Mission in Tunisia) | 
  
    | President | 1999-2009 | Virtuel-Age International Inc., Montréal, Canada | 
  
    | President | 1988-... | Steering Committee of ITS Conferences | 
  
    | Scientific Adviser | 1988-... | R&D Taxation services, Revenue Canada | 
  
    | Full Professor | 1989-... | Comp Sc and Op. Res, Univ. of Montreal | 
  
    | International expert | 1984- | United Nations New York | 
  
    | Associate professor | 1983-1989 | Comp Sc and Op. Res, Univ. of Montreal | 
  
    | Expert for Agence | 1982-1983 | Research division, Ministry of Industry-Paris | 
  
    | Associate professor | 1981-1982 | Computer Science. Univ of Nice | 
  
    | Assistant Prof | 1975-1981 | Computer Science, Univ of Tunis | 
  
    | Engineer | 1972-1974 | Research & Development I.B.M., France |