Before LLB, Brenna was at consulting firm McKinsey & Company in Zurich and London for eight years, reaching the position of partner and head of the Swiss private banking and risk management practice. In this capacity, he advised private banks, cantonal banks, and major international banks in Switzerland and Europe on a wide range of strategic and operational questions. 

"In recent years, he has demonstrated his strategic strengths and his client orientation and will carry our broadly diversified business model into the future with great motivation and conviction on the basis of our values, together with a strong team,” Gabriela Nagel-Jungo, vice chairwoman of the board of directors, said of Brenna. 

Brenna studied at the Federal Institute of Technology Lausanne (EPFL) and at Carnegie Mellon University and Stanford University in the United States, obtaining his doctorate from the Federal Institute of Technology (ETH) Zurich in 2004. He is a Swiss and Italian citizen, and has been a resident of Liechtenstein since 2012. 

LLB thanked Urs Müller, who served as interim CEO of the LLB Group. He will continue to serve as deputy group CEO and focus again on managing the private and corporate clients division and the chairmanship of the board of directors of Bank Linth.

In November last year, the group announced that Georg Wohlwend had resigned as its chairman, due to criminal proceedings against him that were unrelated to his work at LLB Group. Wohlwend has firmly denied the allegations.