He succeeds Tapio Engström, who is leaving the company as of October 19. Engström also served as a member of the company's executive management group.
Koivumäki currently is in charge of Glaston's operations in North America. Before moving to the United States, he worked as Glaston's Group Treasurer from 2006 to 2009 and as managing director of a Finnish subsidiary of Glaston from 2004 to 2006.
With this promotion, Koivumäki will become a member of Glaston's executive management group and will report to president and CEO Arto Metsänen.