• 2008 - 2009
  Sabbatical leave: TU-Berlin
  
  
• 2007 -
  Senior Research Fellow: Bioeng. Inst. Univ. of Auck.
  
  
• 2005 -
  Scientist: Fisher & Paykel Healthcare Ltd
  
  
• 2000 - 2001
  Sabbatical leave: Humboldt Universität zu Berlin
  
  
• 1993 - 2006
  Senior Lecturer: Dept Compuer Sci. Univ. of Auck.
  
  
• 1989 - 1992
  Director: TRL (UK) Ltd
  
  
• 1989 - 1990
  Humboldt Fellow: Inst. für Angewandte Physik der Johanne Wolfgang Goethe Universität, Frankfurt a.M.
  
  
• 1987 - 1988
  Post-doc Fellow: Victoria Univ. of Manchester, U.K.
  
  
• 1984 - 1986
  Lecturer: Dept. Electrical and Electronic Eng, Univ. of Auck.
  
  
• 1982 - 1983
  Lecturer: Dept. Elect. Eng, Univ. of Canterbury, Chch, NZ.
  
  
• 1978 - 1981
  Project Scientist: Division of Applied Sciences, Harvard.
  
  
• 1977 - 1978
  Exchange Student: Space Physics Research Lab., Univ. of Mich.