When Bertmar resigned in 2006 , Zetterberg became chairman again .
Zetterberg was chairman at Carnegie between 2001 and 2002 , before stepping down to vice chairman behind former CEO Lars Bertmar .
When CEO resigned in 2006 , Zetterberg became chairman again .
Zetterberg was chairman at Carnegie between 2001 and 2002 , before stepping down to vice chairman behind former CEO Lars Bertmar .