Doctor of Medicine, University Helsinki (Finland), 1965, Doctor of Philosophy, 1966. Postdoctoral fellow Wistar Institute, Philadelphia, 1967-1970. Resident in surgery U. Helsinki Hospital, 1971-1973, associate chief surgery, 1973-1979.
Assistant professor immunology U. Helsinki, 1970-1979.
Assistant professor surgery U. Oulu, Finland, 1973-1979. Professor transplantation surgery and immunology U. Helsinki and Helsinki U. Central Hospital, 1979.
Visiting professor U. Rene Descartes, Paris, 1974, Duke University, 1977, U. North Carolina, 1977, U. Adelaide, Australia, 1981.
Postdoctoral fellow Wistar Institute, Philadelphia, 1967-1970. Resident in surgery University Helsinki Hospital, 1971-1973. Assistant professor immunology University Helsinki, 1970-1979, University Oulu, Finland, 1973-1979.
Professor transplantation surgery and immunology University Helsinki and Helsinki University Central Hospital, since 1979. Professor clinical surgery and pathology University Calgary, Canada, since 2002. Visiting professor University Rene Descartes, Paris, 1974, Duke University, 1977, University North Carolina, 1977, University Adelaide, Australia, 1981.
Served to 1st lt Finnish Army Med Corps, 1960-1961.
Served to First lieutenant Finnish Medical Corps, 1960-1961, 95. Member Finnish Academy Sciences and Lettres, Scandinavian Society Immunology (board directors 1980-1985), American Association Immunologists, American Society Transplant Surgeons, International Society Heart Transplantation, The Transplantation Society (vice president 1988-1990, councillor 1992-1994, president-elect 1994-1996, president 1996), International Society Nephrology.
Son of Olavi K and Aili (Harjula) Häyry. 1 child Valtteri.