• Visiting professor in the Polar Ice Coring Office,
University of Alaska Fairbanks, US (1991-1994) • The head of International Science and Technology Center's projects (1994–2004) • Visiting lecturer in the Center of Theoretical Research, Facultad de Estudios Superiores Cuautitlan,
UNAM, Mexico (1996, 1998–2000) • Co-leader of the
CRDF (U.S. Civilian Research and Development Foundation) project (1996–1999) • Visiting lecturer in universities of Argentina: Master's program "Numerical Modelling for Environmental Problems", Facultad Regional de San Nicolas,
National Technological University and
National University of San Juan (1997–2002) ==References==