Doctor of Medicine, Aarhus University, Denmark, 1982. Doctor of Philosophy, University Lund, Sweden, 2000.
Manager Swedish Knee Arthroplasty Register, Lund, Sweden, since 1997. Orthopedic surgeon Iceland University Hospital, Reykjavik, since 2000. General secretary Icelandic Orthopaedics Federation, Reykjavik, since 2006.
Editorial board member Acta Orthopaedics, Lund, since 2006. National delegate EFORT, Zurich, Switzerland, since 2006.
Married Elin Olafsdottir, December 31, 1986. Children: Asdis Lovisa Gretarsdottir, Gudridur Anna Gretarsdottir, Heidur Gretarsdottir.