Stora Enso has appointed Tuomas Hallenberg as the head of the company's forestry division and a member of the group's management team. He will join Stora Enso in the last quarter of the year.    Hallenberg succeeds Per Lyrvall , who will retire in March next year.    Hallenberg has a master's degree in Forestry and an MBA. Currently, he works as a director of real estate development at Metsähallitus. Between 1998 and 2014, he worked at UPM in various management positions, mainly in wood procurement and forestry operations.   ...