Swiss pharmaceutical, biotechnology and nutrition manufacturing company Lonza Group said on Tuesday that it has appointed a new chief executive officer. Wolfgang Wienand will join the company during the summer of 2024, the company said, succeeding Albert M Baehny, who has been acting as chief executive beside his role as chairman last year after the then-chief executive Pierre-Alain Ruffieux decided to step down. Wienand is currently chief executive of Siegfried Holding AG, a role he has held since 2019. Prior to that, he first served as chief scientific officer and then as chief strategy offi…