May 04, 2009. /Lesprom Network/. Seppo Parvi will join Ahlstrom to take on the position of CFO and a member of the Corporate Executive Team, as the company informed Lesprom Network. He will start at Ahlstrom on May 25, 2009 and will be based at Ahlstrom Corporation’s Head Office in Helsinki. Ahlstrom is a global leader in the development, manufacture and marketing of high performance fiber-based materials: nonwovens and specialty papers.