Sep 01, 2009. /Lesprom Network/. Head of Holmen Skog, Björn Andrén, will retire on the 31 January, 2010, the company said. Since 1971 Björn Andrén has held many different positions within MoDo Skog and Holmen Skog. In 1984 he was appointed member of the management team of MoDo Skog and since 1997 he has held the position of Head of Holmen Skog. Holmen is a forest products group manufacturing and selling printing paper, paperboard and sawn timber. The Group also owns forest and power assets.