Dr. Tomasson headed the northern division of the Institute of Freshwater Fisheries in 1983-1998, with a five-year interruption while he worked for the Icelandic International Development Agency in Malawi, first as an adviser to the SADC Regional Fisheries Training Programme, and later as a research consultant for stock evaluation on Lake Malawi. He has been the director of the UNU-FTP from its establishment in 1998
MSc, MEd, from Boston University and University of Massachusetts. A scientist at Marine Research Institute since 1993 and with the UNU-FTP since 1999 as the deputy director. His research interest is juvenile fish ecology and fisheries development.